:root {
  --ink: #0b221a;
  --ink-light: #243d34;
  --muted: #577066;
  --muted-light: #7e968d;
  
  --green: #0b6b4f;
  --green-hover: #07563e;
  --green-dark: #053b2a;
  --green-light: #e8f5ef;
  --green-soft: #f0f8f4;
  --green-border: rgba(11, 107, 79, 0.16);
  --green-glow: rgba(11, 107, 79, 0.22);
  
  --accent: #10b981;
  --accent-warm: #d97706;
  --cream: #fbfaf6;
  --paper: rgba(255, 255, 255, 0.95);
  --paper-solid: #ffffff;
  --line: rgba(11, 34, 26, 0.08);
  --line-strong: rgba(11, 107, 79, 0.18);
  
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(11, 34, 26, 0.04);
  --shadow-md: 0 8px 24px rgba(11, 34, 26, 0.06);
  --shadow-lg: 0 16px 40px rgba(11, 107, 79, 0.08);
  --shadow-elevated: 0 24px 60px rgba(11, 107, 79, 0.12);
  
  --font-main: "Hind Siliguri", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 255, 255, 0.96), transparent 32%),
    radial-gradient(circle at 90% 40%, rgba(235, 248, 240, 0.8), transparent 40%),
    linear-gradient(135deg, #f7f5ef 0%, #ebf4ee 100%);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: 16px; /* Prevents auto-zoom on iOS Safari */
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  touch-action: manipulation;
}

button:active {
  transform: scale(0.98);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* BACKGROUND GLOWS */
.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
  z-index: -1;
}
.glow-one {
  width: 500px;
  height: 500px;
  right: -160px;
  top: 60px;
  background: rgba(89, 190, 144, 0.13);
}
.glow-two {
  width: 380px;
  height: 380px;
  left: -150px;
  bottom: -60px;
  background: rgba(231, 190, 82, 0.1);
}

/* MAIN SHELL CONTAINER */
.shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 80px;
  padding-bottom: calc(80px + env(safe-area-inset-bottom, 0px));
}

/* TOPBAR */
.topbar {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
  gap: 12px;
  position: relative;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.brand-mark {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #ffffff;
  background: linear-gradient(135deg, var(--green) 0%, var(--accent) 100%);
  font-size: 24px;
  font-weight: 700;
  box-shadow: 0 6px 18px rgba(11, 107, 79, 0.25);
  transition: transform 0.2s ease;
}

.brand:hover .brand-mark {
  transform: scale(1.05);
}

.brand strong {
  display: block;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1.2;
  white-space: nowrap;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.install-app-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, #0b6b4f 0%, #047857 100%);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(11, 107, 79, 0.25);
  transition: all 0.2s ease;
}

.install-app-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(11, 107, 79, 0.35);
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.install-app-btn[hidden] {
  display: none !important;
}

.change-class-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--green-border);
  background: var(--green-light);
  color: var(--green);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.change-class-btn:hover {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
  box-shadow: 0 4px 12px rgba(11, 107, 79, 0.2);
}

.change-class-btn[hidden] {
  display: none !important;
}

.change-class-icon {
  font-size: 15px;
  line-height: 1;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.9);
  padding: 7px 13px;
  border-radius: var(--radius-full);
  color: var(--ink-light);
  font-size: 12.5px;
  font-weight: 600;
  backdrop-filter: blur(10px);
  white-space: nowrap;
}

.status-pill i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #d97706;
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.18);
  flex-shrink: 0;
}

.status-pill.ready i {
  background: #10b981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.22);
}

/* CLASS GATE / WELCOME LANDING */
.class-gate {
  width: min(840px, 100%);
  margin: 36px auto 0;
  padding: 44px 36px;
  border-radius: var(--radius-xl);
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-elevated);
  text-align: center;
  backdrop-filter: blur(20px);
}

.class-gate-copy {
  margin-bottom: 30px;
}

.class-gate h1 {
  margin: 10px 0 0;
  font-family: Georgia, "Hind Siliguri", serif;
  font-size: clamp(28px, 4.5vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
}

.class-gate h1 em {
  color: var(--green);
  font-style: normal;
  background: linear-gradient(135deg, var(--green) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.class-gate-copy p {
  max-width: 580px;
  margin: 12px auto 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.class-table {
  display: grid;
  gap: 14px;
  text-align: left;
}

.class-table-row {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 16px;
  align-items: center;
  width: 100%;
  padding: 16px 20px;
  background: var(--paper-solid);
  color: var(--ink);
  border: 1.5px solid var(--line);
  border-radius: var(--radius-lg);
  font: inherit;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  text-align: left;
}

.class-table-row:hover {
  border-color: var(--green);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  background: #ffffff;
}

.class-table-row:active {
  transform: scale(0.99);
}

.class-table-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--green-light);
  font-size: 26px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.class-table-row:hover .class-table-icon {
  transform: scale(1.08);
}

.class-table-row strong {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.class-table-row small {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-top: 3px;
}

.class-table-row b {
  color: var(--green);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: var(--green-light);
  transition: all 0.2s ease;
}

.class-table-row:hover b {
  background: var(--green);
  color: #ffffff;
}

/* HERO SECTION */
.hero {
  text-align: center;
  padding: 40px 0 28px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--green-light);
  color: var(--green);
  border: 1px solid var(--green-border);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, "Hind Siliguri", serif;
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.035em;
  font-weight: 700;
}

.hero h1 em {
  color: var(--green);
  font-style: normal;
  background: linear-gradient(135deg, var(--green) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-copy {
  width: min(600px, 100%);
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.6;
}

/* STEP 1: CLASS NAVIGATION TABS */
.class-navigation {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.class-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.92);
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  text-align: left;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  position: relative;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.class-card:hover {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  background: #ffffff;
}

.class-card.active {
  background: linear-gradient(135deg, #0b6b4f 0%, #064e3b 100%);
  border-color: #0b6b4f;
  color: #ffffff;
  box-shadow: 0 10px 28px rgba(11, 107, 79, 0.28);
  transform: translateY(-2px);
}

.class-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 22px;
  background: var(--green-light);
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.class-card.active .class-card-icon {
  background: rgba(255, 255, 255, 0.2);
}

.class-card-info {
  flex: 1;
  min-width: 0;
}

.class-title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.25;
}

.class-subtitle {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.class-card.active .class-subtitle {
  color: rgba(255, 255, 255, 0.85);
}

.class-card-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  opacity: 0;
  transform: scale(0.6);
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.class-card.active .class-card-check {
  opacity: 1;
  transform: scale(1);
}

/* MAIN ASK STUDIO CARD */
.ask-card {
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.95);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-elevated);
  backdrop-filter: blur(24px);
  position: relative;
}

/* ROW 1: VERSION SELECTOR BAR */
.version-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--green-soft);
  border: 1px solid var(--green-border);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  margin-bottom: 18px;
  gap: 12px;
  flex-wrap: wrap;
}

.version-label-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.version-icon {
  font-size: 17px;
  line-height: 1;
}

.version-heading {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.version-pills {
  display: inline-flex;
  background: rgba(255, 255, 255, 0.85);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  gap: 3px;
  flex-wrap: nowrap;
  max-width: 100%;
}

.version-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 0;
  background: transparent;
  color: var(--ink-light);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.version-pill:hover {
  background: rgba(11, 107, 79, 0.08);
  color: var(--green);
}

.version-pill.active {
  background: var(--green);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(11, 107, 79, 0.25);
}

.version-pill .flag {
  font-size: 14px;
  line-height: 1;
}

.version-status {
  font-size: 12px;
  font-weight: 700;
  color: var(--green);
  background: var(--green-light);
  border: 1px solid var(--green-border);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* ROW 2: SUBJECT QUICK CHIPS (Smooth App-Style Scroll Dock) */
.subject-chips-section {
  background: var(--paper-solid);
  border: 1px solid var(--green-border);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.chips-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 8px;
}

.chips-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.chips-hint {
  font-size: 11.5px;
  color: var(--muted);
  font-weight: 500;
}

.subject-chips-scroll-wrap {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 3px 2px 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(11, 107, 79, 0.25) transparent;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x proximity;
}

.subject-chips-scroll-wrap::-webkit-scrollbar {
  height: 4px;
}
.subject-chips-scroll-wrap::-webkit-scrollbar-track {
  background: transparent;
}
.subject-chips-scroll-wrap::-webkit-scrollbar-thumb {
  background: rgba(11, 107, 79, 0.2);
  border-radius: 10px;
}

.subject-chips-list {
  display: flex;
  gap: 8px;
  flex-wrap: nowrap;
  width: max-content;
}

.subject-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1.5px solid var(--green-border);
  background: #f8fbf9;
  color: #1f4538;
  padding: 8px 15px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 600;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
  scroll-snap-align: start;
}

.subject-chip span {
  font-size: 15px;
  line-height: 1;
}

.subject-chip:hover {
  border-color: var(--green);
  background: var(--green-light);
  color: var(--green);
  transform: translateY(-1px);
}

.subject-chip.active {
  background: linear-gradient(135deg, #0b6b4f 0%, #064e3b 100%);
  color: #ffffff;
  border-color: #0b6b4f;
  box-shadow: 0 4px 14px rgba(11, 107, 79, 0.28);
  font-weight: 700;
}

/* ROW 3: FILTERS (BOOK & CHAPTER DROPDOWNS & PRACTICE) */
.filters-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.filter-field label {
  display: block;
  margin-bottom: 7px;
}

.field-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-light);
  font-size: 13px;
  font-weight: 700;
}

.field-label span {
  color: var(--green);
}

.field-icon {
  font-size: 15px;
}

.select-wrapper {
  position: relative;
}

select {
  width: 100%;
  height: 48px;
  border: 1.5px solid var(--line-strong);
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 0 40px 0 14px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  outline: none;
  transition: all 0.18s ease;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%230b6b4f' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

select:hover {
  border-color: rgba(11, 107, 79, 0.35);
}

select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(11, 107, 79, 0.12);
}

/* ROW 4: QUESTION STUDIO */
.ask-form-layout {
  display: flex;
  flex-direction: column;
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 6px;
}

.question-label {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.char-hint {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.question-box-wrapper {
  background: #ffffff;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-lg);
  padding: 4px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
  display: flex;
  align-items: flex-end;
}

.question-box-wrapper:focus-within {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(11, 107, 79, 0.12);
}

.question-box-wrapper.drag-over {
  border-color: var(--accent);
  background: rgba(16, 185, 129, 0.08);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
}

textarea {
  width: 100%;
  min-height: 84px;
  resize: vertical;
  border: 0;
  outline: 0;
  padding: 10px 88px 10px 14px;
  color: var(--ink);
  background: transparent;
  font-size: 15.5px;
  line-height: 1.6;
  font-family: inherit;
}

.input-actions-cluster {
  position: absolute;
  right: 8px;
  bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 2;
}

.image-upload-btn,
.voice-mic-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--green-border);
  background: var(--green-light);
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  font-size: 16px;
  box-shadow: var(--shadow-sm);
}

.image-upload-btn:hover,
.voice-mic-btn:hover {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
  transform: scale(1.08);
  box-shadow: 0 4px 12px rgba(11, 107, 79, 0.25);
}

.voice-mic-btn.is-recording {
  background: #ef4444 !important;
  border-color: #dc2626 !important;
  color: #ffffff !important;
  animation: micPulseWave 1.2s infinite;
}

@keyframes micPulseWave {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5); }
  70% { transform: scale(1.08); box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.voice-mic-btn.unsupported {
  opacity: 0.35;
  cursor: not-allowed;
}

/* IMAGE PREVIEW CONTAINER */
.image-preview-container {
  margin-top: 10px;
}

.image-preview-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(16, 185, 129, 0.25);
  background: linear-gradient(135deg, rgba(238, 248, 243, 0.95), rgba(220, 245, 233, 0.7));
  box-shadow: 0 3px 10px rgba(11, 107, 79, 0.06);
  animation: fadeIn 0.2s ease;
}

.image-preview-thumb {
  width: 52px;
  height: 52px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(11, 107, 79, 0.2);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  background: #ffffff;
}

.image-preview-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.image-preview-name {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.image-preview-tag {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--green);
}

.image-remove-btn {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(220, 38, 38, 0.2);
  background: #ffffff;
  color: #dc2626;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.16s ease;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.image-remove-btn:hover {
  background: #dc2626;
  color: #ffffff;
  border-color: #dc2626;
  transform: scale(1.1);
}

/* ANSWER IMAGE BADGE */
.answer-image-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #e8f5ef, #d1fae5);
  border: 1px solid rgba(16, 185, 129, 0.28);
  color: var(--green-dark);
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 14px;
}

textarea::placeholder {
  color: #94aca2;
  font-size: 14.5px;
}

/* FORM BOTTOM BAR */
.form-bottom-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 14px;
  gap: 14px;
  flex-wrap: wrap;
}

.examples-container {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
  min-width: 0;
}

.examples-tag {
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
  white-space: nowrap;
}

.examples-list {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.example-btn {
  border: 1px solid var(--green-border);
  background: #f4f9f6;
  color: #2c5447;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  transition: all 0.16s ease;
  cursor: pointer;
  white-space: nowrap;
}

.example-btn:hover {
  border-color: var(--green);
  color: var(--green);
  background: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(11, 107, 79, 0.1);
}

.submit-ask-btn {
  height: 48px;
  min-width: 150px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  border: 0;
  border-radius: var(--radius-md);
  padding: 0 22px;
  background: linear-gradient(135deg, #0b6b4f 0%, #064e3b 100%);
  color: #ffffff;
  font-size: 15.5px;
  font-weight: 700;
  box-shadow: 0 6px 20px rgba(11, 107, 79, 0.28);
  transition: all 0.2s ease;
  cursor: pointer;
  flex-shrink: 0;
}

.submit-ask-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(11, 107, 79, 0.35);
  background: linear-gradient(135deg, #0d7b5b 0%, #075641 100%);
}

.submit-ask-btn:active {
  transform: scale(0.98);
}

.submit-ask-btn:disabled {
  opacity: 0.65;
  transform: none;
  cursor: wait;
}

.btn-arrow {
  font-size: 18px;
  line-height: 1;
  transition: transform 0.18s ease;
}

.submit-ask-btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* RESULTS LAYOUT */
.result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.8fr);
  gap: 20px;
  margin-top: 26px;
}

.answer-card, .sources-card {
  border: 1px solid var(--green-border);
  border-radius: var(--radius-xl);
  background: var(--paper);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
}

.answer-card {
  padding: 26px;
  position: relative;
  overflow: hidden;
}

.answer-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--green), var(--accent), #38bdf8);
}

.card-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  gap: 12px;
  flex-wrap: wrap;
}

.card-heading-left {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: 0;
}

.card-heading .icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: #ffffff;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #0b6b4f 0%, #10b981 100%);
  font-size: 19px;
  box-shadow: 0 4px 14px rgba(11, 107, 79, 0.28);
  flex-shrink: 0;
}

.card-heading p, .sources-heading p {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.card-heading small, .sources-heading small {
  color: var(--muted);
  font-size: 12px;
  display: block;
  margin-top: 3px;
  font-weight: 500;
}

.card-heading-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.tts-answer-btn,
.print-answer-btn,
.save-answer-btn,
.copy-answer-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(11, 107, 79, 0.2);
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink-light);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 2px 6px rgba(11, 34, 26, 0.04);
  white-space: nowrap;
}

.tts-answer-btn {
  background: linear-gradient(135deg, rgba(236, 253, 245, 0.95), rgba(209, 250, 229, 0.95));
  color: var(--green-dark);
  border-color: rgba(16, 185, 129, 0.35);
}

.tts-answer-btn:hover,
.print-answer-btn:hover,
.save-answer-btn:hover,
.copy-answer-btn:hover {
  background: linear-gradient(135deg, #0b6b4f 0%, #08563e 100%);
  color: #ffffff;
  border-color: #0b6b4f;
  transform: translateY(-1.5px);
  box-shadow: 0 4px 14px rgba(11, 107, 79, 0.25);
}

.tts-answer-btn.is-active {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  color: #ffffff;
  border-color: #047857;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
  animation: pulseSpeaking 2s infinite ease-in-out;
}

@keyframes pulseSpeaking {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
}

.save-answer-btn.is-saved {
  background: linear-gradient(135deg, #0b6b4f 0%, #10b981 100%);
  color: #ffffff;
  border-color: #0b6b4f;
  box-shadow: 0 4px 12px rgba(11, 107, 79, 0.2);
}

.copy-answer-btn.copied {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  border-color: #10b981;
}

/* TTS AUDIO LECTURE PLAYER BAR */
.tts-player-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin: 14px 0 16px;
  padding: 10px 16px;
  background: linear-gradient(135deg, rgba(236, 253, 245, 0.95), rgba(240, 253, 244, 0.95));
  border: 1.5px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(11, 107, 79, 0.08);
  animation: slideDownFade 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDownFade {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tts-player-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.tts-ctrl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--green-border);
  background: #ffffff;
  color: var(--green-dark);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.18s ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.tts-ctrl-btn:hover {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
  transform: scale(1.05);
}

.tts-wave-container {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  height: 22px;
  padding: 0 4px;
}

.tts-wave-bar {
  width: 3.5px;
  height: 4px;
  border-radius: 3px;
  background: var(--green);
  transition: height 0.18s ease;
}

.tts-player-bar.is-playing .tts-wave-bar:nth-child(1) { animation: ttsWave 0.65s ease-in-out infinite 0.1s; }
.tts-player-bar.is-playing .tts-wave-bar:nth-child(2) { animation: ttsWave 0.65s ease-in-out infinite 0.35s; }
.tts-player-bar.is-playing .tts-wave-bar:nth-child(3) { animation: ttsWave 0.65s ease-in-out infinite 0.18s; }
.tts-player-bar.is-playing .tts-wave-bar:nth-child(4) { animation: ttsWave 0.65s ease-in-out infinite 0.45s; }
.tts-player-bar.is-playing .tts-wave-bar:nth-child(5) { animation: ttsWave 0.65s ease-in-out infinite 0.22s; }

@keyframes ttsWave {
  0%, 100% { height: 4px; }
  50% { height: 20px; }
}

.tts-status-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tts-status-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
}

.tts-progress-time {
  font-size: 11px;
  color: var(--muted);
  font-weight: 600;
}

.tts-player-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tts-speed-selector {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.7);
  padding: 3px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--green-border);
}

.tts-speed-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
}

.tts-speed-btn {
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink-light);
  font: inherit;
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tts-speed-btn:hover {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green-dark);
}

.tts-speed-btn.active {
  background: var(--green);
  color: #ffffff;
}

.tts-close-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 0;
  background: rgba(0, 0, 0, 0.06);
  color: var(--ink-light);
  font-size: 12px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tts-close-btn:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #dc2626;
}

.voice-mic-btn.is-recording {
  background: #ef4444 !important;
  border-color: #dc2626 !important;
  color: #ffffff !important;
  animation: micPulse 1.2s infinite ease-in-out;
}

@keyframes micPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5); }
  50% { box-shadow: 0 0 0 10px rgba(239, 68, 68, 0); }
}

.flashcard-speak-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--green-border);
  background: #ffffff;
  color: var(--green-dark);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.18s ease;
}

.flashcard-speak-btn:hover {
  background: var(--green-light);
  border-color: var(--green);
  transform: translateY(-1px);
}

.followup-msg-speak-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid var(--green-border);
  background: #ffffff;
  color: var(--green-dark);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: all 0.15s ease;
}

.followup-msg-speak-btn:hover {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
}

/* PERSONAL LEARNING LAYER */
.learning-hub-btn, .save-answer-btn, .feedback-btn, .note-save-btn {
  border: 1px solid var(--green-border);
  background: #fff;
  color: var(--green-dark);
  border-radius: var(--radius-sm);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.account-btn { border: 0; background: transparent; color: var(--ink-light); font: inherit; font-size: 12px; font-weight: 700; cursor: pointer; white-space: nowrap; }
.learning-hub-btn {
  padding: 7px 11px;
  font-size: 12px;
}
.study-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: -4px 0 20px;
  padding: 11px 14px;
  border: 1px solid var(--green-border);
  background: rgba(236, 248, 241, .7);
  border-radius: var(--radius-md);
}
.study-summary > div { display: flex; align-items: baseline; gap: 7px; }
.study-summary span { color: var(--muted); font-size: 12px; }
.study-summary strong { color: var(--green-dark); font-size: 17px; }
.study-summary button { margin-left: auto; border: 0; background: transparent; color: var(--green); font: inherit; font-size: 12px; font-weight: 700; cursor: pointer; }
.answer-learning-tools {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.feedback-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 500;
}
.feedback-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid var(--green-border);
  background: #ffffff;
  color: var(--green-dark);
  cursor: pointer;
  transition: all 0.18s ease;
  box-shadow: var(--shadow-sm);
}
.feedback-btn:hover {
  background: var(--green-light);
  border-color: var(--green);
  transform: translateY(-1px);
}
.feedback-btn.is-selected {
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--green-hover));
  border-color: var(--green);
  box-shadow: 0 3px 10px rgba(11, 107, 79, 0.2);
}
.personal-note-label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink-light);
  font-size: 13px;
  font-weight: 700;
}
#personalNote {
  width: 100%;
  min-height: 72px;
  padding: 12px 14px;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: #fff;
  font: inherit;
  font-size: 14px;
  line-height: 1.6;
  resize: vertical;
  transition: all 0.2s ease;
}
#personalNote:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
}
.note-save-btn {
  margin-top: 10px;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: 1px solid var(--green-border);
  background: var(--green-soft);
  color: var(--green-dark);
  cursor: pointer;
  transition: all 0.18s ease;
  box-shadow: var(--shadow-sm);
}
.note-save-btn:hover {
  background: var(--green);
  color: #ffffff;
  border-color: var(--green);
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(11, 107, 79, 0.2);
}
.learning-dialog { width: min(760px, calc(100% - 24px)); }
.study-plan-dialog { width: min(560px, calc(100% - 24px)); }
.plan-streak { display:flex; align-items:center; justify-content:space-between; gap:12px; margin:16px 0; padding:14px; border-radius:var(--radius-sm); background:linear-gradient(135deg,#fff3d7,#eef9f3); color:var(--ink); }
.plan-streak strong { font-size:17px; }.plan-streak span,.plan-reminder-note { color:var(--muted); font-size:12px; }
.study-plan-tasks { display:grid; gap:9px; }.study-plan-task { display:grid; grid-template-columns:28px 1fr; gap:3px 10px; align-items:center; width:100%; padding:13px; border:1px solid var(--line); border-radius:var(--radius-sm); background:#fff; color:var(--ink); text-align:left; font:inherit; cursor:pointer; }.study-plan-task > span { grid-row:span 2; color:var(--green); font-size:22px; }.study-plan-task strong { font-size:14px; }.study-plan-task small { color:var(--muted); font-size:11px; }.study-plan-task.done { border-color:var(--green-border); background:var(--green-soft); }.plan-reminder-btn { display:block; width:100%; margin-top:16px; padding:11px; border:1px solid var(--green-border); border-radius:var(--radius-sm); background:var(--green); color:#fff; font:inherit; font-size:13px; font-weight:700; cursor:pointer; }.plan-reminder-note { display:block; margin-top:8px; text-align:center; }
.learning-tabs { display: flex; gap: 6px; margin-bottom: 12px; border-bottom: 1px solid var(--line); }
.learning-tab { border: 0; border-bottom: 2px solid transparent; padding: 8px 10px; background: transparent; color: var(--muted); font: inherit; font-size: 13px; font-weight: 700; cursor: pointer; }
.learning-tab.active { color: var(--green); border-bottom-color: var(--green); }
.learning-list { display: grid; gap: 9px; min-height: 120px; max-height: 56vh; overflow: auto; }
.learning-item { width: 100%; padding: 13px; text-align: left; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; cursor: pointer; }
.learning-item:hover { border-color: var(--green); }
.learning-item strong, .learning-item small { display: block; }
.learning-item strong { color: var(--ink); font-size: 14px; }
.learning-item small { margin-top: 5px; color: var(--muted); font-size: 11.5px; }
.learning-item .learning-note { color: var(--green-dark); }
.learning-empty { margin: auto; color: var(--muted); text-align: center; font-size: 14px; }
.clear-learning-btn { display: block; margin: 15px 0 0 auto; border: 0; background: transparent; color: #a4493d; font: inherit; font-size: 12px; font-weight: 700; cursor: pointer; }
.learning-dialog-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.learning-dialog-actions .clear-learning-btn { margin: 15px 0 0; }
.report-btn { margin-top: 15px; padding: 7px 10px; border: 1px solid var(--green-border); border-radius: var(--radius-sm); background: var(--green-soft); color: var(--green); font: inherit; font-size: 12px; font-weight: 700; cursor: pointer; }
.account-dialog { width: min(460px, calc(100% - 24px)); border-radius: 20px; padding: 24px; }
.account-tabs { display: flex; gap: 8px; margin-bottom: 18px; border-bottom: 1.5px solid var(--line); padding-bottom: 2px; }
.account-tab { border: 0; border-bottom: 2.5px solid transparent; padding: 8px 14px; background: transparent; color: var(--muted); font: inherit; font-size: 14px; font-weight: 700; cursor: pointer; transition: all 0.18s ease; }
.account-tab:hover:not(.active) { color: var(--ink); }
.account-tab.active { color: var(--green); border-bottom-color: var(--green); }
.account-form { display: grid; gap: 8px; }
.account-form label { color: var(--ink-light); font-size: 13px; font-weight: 700; }
.account-form input { height: 44px; padding: 0 14px; border: 1.5px solid var(--line-strong); border-radius: 12px; font: inherit; font-size: 14.5px; transition: all 0.18s ease; }
.account-form input:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 4px rgba(11, 107, 79, 0.12); }
.account-submit { min-height: 46px; margin-top: 10px; border: 0; border-radius: 12px; background: linear-gradient(135deg, var(--green), var(--green-hover)); color: #fff; font: inherit; font-size: 15px; font-weight: 700; cursor: pointer; transition: all 0.18s ease; box-shadow: 0 4px 14px rgba(11, 107, 79, 0.25); }
.account-submit:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(11, 107, 79, 0.32); }
.account-submit:disabled { opacity: .7; cursor: wait; transform: none; }
.account-message { min-height: 20px; margin: 4px 0 0; color: #a4493d; font-size: 12.5px; font-weight: 600; }
.account-message.is-success { color: var(--green); }
.account-member-icon { width: 46px; height: 46px; display: grid; place-items: center; margin: 8px 0 14px; border-radius: 50%; background: var(--green-light); color: var(--green); font-size: 22px; font-weight: 800; }
.account-member-copy { color: var(--muted); line-height: 1.65; font-size: 14px; }
.account-member-copy strong { color: var(--ink); font-size: 15px; }
.account-logout { width: 100%; background: #fff; color: #a4493d; border: 1px solid #eccbc6; box-shadow: none; }
.account-logout:hover { background: #fdf5f4; border-color: #a4493d; box-shadow: 0 4px 12px rgba(164, 73, 61, 0.12); }
.analytics-panel { margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--line); }
.analytics-heading { display: flex; justify-content: space-between; align-items: start; gap: 16px; }
.analytics-heading h2 { margin: 0; font-size: 21px; }
.analytics-content { margin-top: 15px; color: var(--muted); font-size: 14px; }
.analytics-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.analytics-stats > div { padding: 14px; border: 1px solid var(--green-border); border-radius: var(--radius-sm); background: var(--green-soft); }
.analytics-stats strong, .analytics-stats span { display: block; }.analytics-stats strong { color: var(--green); font-size: 23px; }.analytics-stats span { margin-top: 3px; font-size: 12px; }
.analytics-columns { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 18px; }.analytics-columns h3 { margin: 0 0 8px; color: var(--ink); font-size: 14px; }.analytics-columns ul { padding: 0; margin: 0; list-style: none; }.analytics-columns li { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px solid var(--line); font-size: 12px; }.analytics-columns b { color: var(--green); }

.answer-text {
  padding: 18px 2px 2px 0;
  font-size: 16.5px;
  line-height: 1.8;
  max-height: 680px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(11, 107, 79, 0.3) transparent;
  color: var(--ink);
  word-break: break-word;
}

.answer-text p {
  margin: 0 0 14px;
}

.answer-text p:last-child {
  margin-bottom: 0;
}

.answer-text strong {
  color: #074533;
  font-weight: 700;
}

.answer-text em {
  font-style: italic;
  color: var(--ink-light);
}

.answer-text .answer-h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--green);
  margin: 18px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.answer-text .answer-h3 {
  font-size: 18px;
  font-weight: 700;
  color: #0d543e;
  margin: 16px 0 8px;
}

.answer-text .answer-h4 {
  font-size: 16px;
  font-weight: 700;
  color: #1a4235;
  margin: 14px 0 6px;
}

.answer-text .answer-hr {
  border: 0;
  border-top: 1px dashed var(--line);
  margin: 18px 0;
}

.answer-text ul.answer-list {
  margin: 8px 0 16px 0;
  padding-left: 0;
  list-style: none;
}

.answer-text ul.answer-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  line-height: 1.75;
}

.answer-text ul.answer-list li::before {
  content: "•";
  position: absolute;
  left: 2px;
  top: 0;
  color: var(--green);
  font-size: 20px;
  line-height: 1.2;
}

.answer-text ol.answer-num-list {
  margin: 8px 0 16px 0;
  padding-left: 22px;
}

.answer-text ol.answer-num-list li {
  margin-bottom: 8px;
  padding-left: 4px;
  line-height: 1.75;
}

.answer-notice {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(239, 250, 245, 0.95), rgba(220, 245, 233, 0.7));
  color: var(--green-dark);
  font-size: 13.5px;
  line-height: 1.6;
  border: 1px solid rgba(16, 185, 129, 0.28);
  box-shadow: 0 4px 12px rgba(11, 107, 79, 0.05);
}

.answer-notice.is-warning {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  color: #92400e;
  border: 1px solid #fcd34d;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.1);
}

/* SOURCES SECTION */
.sources-card {
  padding: 22px;
  align-self: start;
  position: sticky;
  top: 18px;
  max-height: 720px;
  overflow-y: auto;
}

.sources-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.source-count-badge {
  min-width: 32px;
  height: 32px;
  padding: 0 8px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #e6f7ef 0%, #d1fae5 100%);
  color: var(--green);
  font-weight: 700;
  font-size: 13.5px;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.source-item {
  width: 100%;
  display: block;
  text-align: left;
  border: 1px solid rgba(11, 107, 79, 0.14);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.95);
  color: inherit;
  padding: 15px 16px;
  margin-top: 12px;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(11, 34, 26, 0.04);
  position: relative;
  overflow: hidden;
}

.source-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background 0.2s ease;
}

.source-item:hover {
  border-color: rgba(16, 185, 129, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(11, 107, 79, 0.1);
}

.source-item:hover::before {
  background: linear-gradient(to bottom, var(--green), #10b981);
}

.source-item strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
}

.source-item span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--green);
  font-size: 12px;
  font-weight: 600;
  margin-top: 6px;
  padding: 3px 8px;
  background: var(--green-soft);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(11, 107, 79, 0.1);
}

.source-item p {
  margin: 9px 0 0;
  color: #4b6159;
  font-size: 13px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* EMPTY STATE */
.empty-state {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  text-align: left;
  padding: 48px 16px 10px;
  color: var(--muted);
}

.empty-state h2 {
  margin: 0 0 4px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 700;
}

.empty-state p {
  margin: 0;
  font-size: 14.5px;
}

.book-orbit {
  width: 64px;
  height: 64px;
  border: 1.5px solid var(--green-border);
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.book-orbit span {
  font-size: 28px;
  color: var(--green);
}

.hidden {
  display: none !important;
}

/* DIALOG / MODAL (MOBILE FRIENDLY BOTTOM SHEET ON MOBILE) */
dialog {
  width: min(880px, calc(100% - 24px));
  max-height: 90vh;
  max-height: 90dvh;
  margin: auto;
  border: 0;
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.35);
  background: #f7f5ed;
  color: var(--ink);
  overflow-y: auto;
  position: fixed;
  inset: 0;
}

dialog::backdrop {
  background: rgba(7, 25, 20, 0.7);
  backdrop-filter: blur(8px);
}

.dialog-close {
  position: absolute;
  right: 16px;
  top: 16px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: #ffffff;
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  box-shadow: var(--shadow-md);
  display: grid;
  place-items: center;
  cursor: pointer;
  z-index: 10;
  transition: transform 0.18s ease;
}

.dialog-close:hover {
  transform: scale(1.1);
  color: #b33e35;
}

.dialog-title {
  padding: 0 48px 16px 0;
}

.dialog-title strong {
  display: block;
  font-size: 18px;
  font-weight: 700;
}

.dialog-title small {
  display: block;
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 2px;
}

#pageImage {
  width: 100%;
  border-radius: var(--radius-md);
  display: none;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  object-fit: contain;
}

.page-loading {
  min-height: 240px;
  display: grid;
  place-items: center;
  color: var(--muted);
  background: #ffffff;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
}

.page-text-fallback {
  display: block;
  max-height: 60vh;
  overflow-y: auto;
  padding: 20px;
  white-space: pre-wrap;
  text-align: left;
  line-height: 1.75;
  color: var(--ink);
  background: #ffffff;
  border-radius: var(--radius-md);
  font-size: 15px;
}

/* ADMIN DASHBOARD */
.admin-shell {
  max-width: 1080px;
}
.admin-login-layout {
  min-height: calc(100vh - 150px);
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
  padding: 40px 20px 60px;
}
.admin-login-intro {
  max-width: 540px;
}
.eyebrow {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--green);
  font-weight: 800;
  margin-bottom: 12px;
}
.admin-login-intro h1, .admin-dashboard h1 {
  margin: 0;
  font-family: Georgia, "Hind Siliguri", serif;
  font-size: clamp(32px, 4.5vw, 54px);
  letter-spacing: -0.04em;
  line-height: 1.1;
}
.admin-login-intro h1 em {
  color: var(--green);
  font-style: normal;
}
.admin-login-intro > p {
  max-width: 460px;
  margin: 18px 0 24px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}
.admin-trust {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--green-border);
  border-radius: var(--radius-md);
}
.admin-trust > span {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--green);
  color: #ffffff;
  font-weight: 800;
  font-size: 13px;
}
.admin-trust strong {
  font-size: 13px;
  display: block;
}
.admin-trust small {
  color: var(--muted);
  font-size: 11.5px;
  display: block;
}
.admin-card {
  padding: 30px;
  border-radius: var(--radius-xl);
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-elevated);
}
.admin-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  background: var(--green-light);
  font-size: 22px;
  margin-bottom: 16px;
}
.login-panel h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.02em;
}
.login-panel p {
  margin: 6px 0 18px;
  color: var(--muted);
  font-size: 14.5px;
}
.admin-input-label {
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-light);
  margin-bottom: 6px;
}
.admin-card input {
  width: 100%;
  height: 46px;
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius-md);
  padding: 0 14px;
  margin-bottom: 16px;
  background: #ffffff;
  transition: all 0.18s ease;
}
.admin-card input:focus, .provider-input input:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(11, 107, 79, 0.12);
}
.ask-button {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: var(--radius-md);
  color: #ffffff;
  background: linear-gradient(135deg, var(--green) 0%, var(--green-dark) 100%);
  font-size: 15.5px;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(11, 107, 79, 0.25);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.ask-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(11, 107, 79, 0.32);
}
.form-message {
  min-height: 20px;
  color: #b33e35 !important;
  font-size: 13px;
  font-weight: 600;
  margin-top: 10px;
}
.admin-dashboard {
  margin: 32px 0 60px;
  padding: 34px;
  border-radius: var(--radius-xl);
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-elevated);
}
.admin-dashboard-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}
.admin-dashboard-head p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
}
.secondary-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  color: var(--ink-light);
  padding: 8px 14px;
  font-weight: 700;
  font-size: 13.5px;
  border: 1.5px solid var(--line-strong);
  background: #ffffff;
  border-radius: var(--radius-sm);
  transition: all 0.18s ease;
}
.secondary-button:hover {
  border-color: var(--green);
  color: var(--green);
}
.admin-info-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 22px 0 20px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--green-soft);
  color: #3b5c51;
  font-size: 13px;
  border: 1px solid var(--green-border);
}
.info-dot {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--green);
  color: #ffffff;
  font-weight: 700;
  font-size: 12px;
}
.provider-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.provider-card {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 14px;
  background: #ffffff;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-md);
  transition: all 0.18s ease;
}
.provider-card:hover {
  border-color: var(--green);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.provider-card.is-set {
  border-color: rgba(11, 107, 79, 0.3);
}
.provider-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  font-size: 17px;
  font-weight: 800;
  background: #edf7f2;
  color: var(--green);
}
.provider-icon.groq { background: #fff1df; color: #d87520; }
.provider-icon.openai { background: #e8f4ee; color: #16724f; }
.provider-icon.anthropic { background: #f6eee6; color: #815a3c; }
.provider-icon.router { background: #eef0ff; color: #5365ba; }
.provider-icon.deepseek { background: #edf4ff; color: #3470b9; }
.provider-icon.mistral { background: #fff0e9; color: #e6642e; }
.provider-icon.custom { background: #f2effa; color: #7557a6; }
.provider-copy { min-width: 0; }
.provider-copy strong { font-size: 14px; display: block; }
.provider-copy small {
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  margin-top: 2px;
}
.provider-state {
  color: var(--green);
  background: var(--green-light);
  border-radius: var(--radius-full);
  padding: 4px 8px;
  font-size: 10.5px;
  font-weight: 700;
  white-space: nowrap;
}
.provider-card:not(.is-set) .provider-state {
  color: #66776f;
  background: #f0f3f1;
}
.provider-input {
  grid-column: 1 / -1;
  position: relative;
  margin-top: 4px;
}
.provider-input input {
  width: 100%;
  height: 40px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  font-size: 13px;
  background: #fbfdfc;
}
.provider-input small {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
}
.admin-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
}
.save-button {
  width: auto;
  padding: 0 22px;
}

/* =========================================================
   RESPONSIVE DESIGN BREAKPOINTS (TABLET & MOBILE OPTIMIZED)
   ========================================================= */

/* Tablets & Small Laptops (max-width: 880px) */
@media (max-width: 880px) {
  .shell {
    width: min(100% - 24px, 880px);
  }
  
  .result-layout {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  
  .sources-card {
    position: static;
    max-height: none;
    overflow: visible;
  }
  
  .answer-text {
    max-height: none;
  }
  
  .admin-login-layout {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 30px 10px 48px;
  }
  
  .admin-login-intro {
    text-align: center;
    margin: 0 auto;
  }
  
  .admin-login-intro > p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .provider-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile Screens (max-width: 768px) */
@media (max-width: 768px) {
  .shell {
    width: calc(100% - 20px);
    padding-bottom: 60px;
  }

  /* Topbar Mobile */
  .topbar {
    min-height: 64px;
    padding: 10px 0;
  }

  .brand {
    gap: 10px;
    white-space: pre-line;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 20px;
    border-radius: 11px;
  }

  .brand strong {
    font-size: 16.5px;
  }

  .brand small {
    font-size: 11px;
    max-width: 160px;
  }

  .change-class-btn {
    padding: 6px 10px;
    font-size: 12px;
    gap: 4px;
  }

  .status-pill {
    padding: 6px 10px;
    font-size: 11.5px;
  }
  
  .status-pill span {
    display: none; /* Icon-only status dot to save space on mobile */
  }

  /* Hero Mobile */
  .hero {
    padding: 24px 0 18px;
  }

  .hero-badge {
    font-size: 11.5px;
    padding: 5px 12px;
    margin-bottom: 10px;
  }

  .hero-copy {
    font-size: 15px;
    margin-top: 10px;
  }

  /* Class Gate Mobile */
  .class-gate {
    margin-top: 16px;
    padding: 24px 16px;
    border-radius: var(--radius-lg);
  }

  .class-gate-copy p {
    font-size: 14.5px;
    margin-top: 8px;
  }

  .class-table-row {
    grid-template-columns: 44px 1fr auto;
    gap: 12px;
    padding: 13px 14px;
    border-radius: var(--radius-md);
  }

  .class-table-icon {
    width: 44px;
    height: 44px;
    font-size: 22px;
    border-radius: 11px;
  }

  .class-table-row strong {
    font-size: 16px;
  }

  .class-table-row small {
    font-size: 11.5px;
  }

  .class-table-row b {
    padding: 6px 10px;
    font-size: 12px;
  }

  /* Class Navigation Cards Mobile */
  .class-navigation {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 16px;
  }

  .class-card {
    padding: 10px 8px;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 6px;
    border-radius: var(--radius-md);
  }

  .class-card-icon {
    width: 36px;
    height: 36px;
    font-size: 18px;
    border-radius: 10px;
  }

  .class-title {
    font-size: 13.5px;
    white-space: nowrap;
  }

  .class-subtitle {
    font-size: 10.5px;
  }

  .class-card-check {
    display: none;
  }

  /* Ask Card Mobile */
  .ask-card {
    padding: 18px 14px;
    border-radius: var(--radius-lg);
  }

  /* Version Bar Mobile */
  .version-bar {
    padding: 10px 12px;
    gap: 10px;
  }

  .version-label-wrap {
    width: 100%;
    justify-content: space-between;
  }

  .version-pills {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    padding: 2px;
  }

  .version-pill {
    padding: 6px 4px;
    font-size: 11.5px;
    gap: 4px;
  }

  .version-pill .flag {
    font-size: 12px;
  }

  .version-status {
    width: 100%;
    text-align: center;
    padding: 4px 8px;
    font-size: 11.5px;
  }

  /* Subject Chips Mobile */
  .subject-chips-section {
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
  }

  .chips-header {
    margin-bottom: 8px;
  }

  .chips-title {
    font-size: 12px;
  }

  .chips-hint {
    font-size: 10.5px;
  }

  .subject-chip {
    padding: 6px 12px;
    font-size: 12.5px;
  }

  /* Filters Mobile */
  .filters-grid {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 16px;
  }

  select {
    height: 46px;
    font-size: 14.5px;
    border-radius: var(--radius-sm);
  }

  /* Question Input Mobile */
  .question-header {
    margin-bottom: 6px;
  }

  .question-label {
    font-size: 12.5px;
  }

  .char-hint {
    font-size: 11px;
  }

  .question-box-wrapper {
    border-radius: var(--radius-md);
  }

  textarea {
    min-height: 80px;
    font-size: 15px;
    padding: 8px 10px;
  }

  /* Form Bottom Bar & Buttons Mobile */
  .form-bottom-bar {
    margin-top: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .examples-container {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .examples-list {
    flex-wrap: nowrap;
    width: max-content;
  }

  .submit-ask-btn {
    width: 100%;
    height: 48px;
    font-size: 16px;
  }

  /* Results Card Mobile */
  .answer-card {
    padding: 18px 14px;
    border-radius: var(--radius-lg);
  }

  .card-heading {
    padding-bottom: 12px;
  }

  .card-heading p {
    font-size: 15.5px;
  }

  .copy-answer-btn {
    padding: 5px 10px;
    font-size: 12px;
  }

  .learning-hub-btn { padding: 6px 8px; font-size: 11px; }
  .study-summary { gap: 8px; padding: 10px; }
  .study-summary > div { flex-direction: column; gap: 0; }
  .study-summary button { font-size: 11px; }
  .answer-learning-tools { margin-top: 16px; }
  .learning-dialog { width: calc(100% - 16px); }

  .answer-text {
    font-size: 15.5px;
    line-height: 1.75;
  }

  .answer-text .answer-h2 {
    font-size: 18px;
  }

  .answer-text .answer-h3 {
    font-size: 16.5px;
  }

  .sources-card {
    padding: 16px 14px;
    border-radius: var(--radius-lg);
  }

  .source-item {
    padding: 12px;
    border-radius: var(--radius-sm);
  }

  /* Empty State Mobile */
  .empty-state {
    flex-direction: column;
    text-align: center;
    padding: 32px 10px 10px;
    gap: 14px;
  }

  .empty-state h2 {
    font-size: 18px;
  }

  .empty-state p {
    font-size: 13.5px;
  }

  /* Dialog Modal Mobile (Bottom Sheet Style) */
  dialog {
    width: calc(100% - 16px);
    max-height: 92vh;
    max-height: 92dvh;
    border-radius: var(--radius-lg);
    padding: 18px 14px;
    margin-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  }

  .dialog-close {
    width: 36px;
    height: 36px;
    font-size: 20px;
    right: 12px;
    top: 12px;
  }

  .dialog-title {
    padding-right: 40px;
  }

  .dialog-title strong {
    font-size: 16px;
  }

  .dialog-title small {
    font-size: 12px;
  }

  .page-text-fallback {
    padding: 14px;
    font-size: 14px;
  }

  /* Admin Dashboard Mobile */
  .admin-dashboard {
    margin-top: 18px;
    padding: 20px 14px;
    border-radius: var(--radius-lg);
  }

  .admin-dashboard-head {
    display: block;
  }

  .admin-dashboard-head .secondary-button {
    margin-top: 14px;
  }

  .admin-actions {
    display: block;
  }

  .save-button {
    width: 100%;
    margin-top: 12px;
  }

  .login-panel {
    padding: 22px 16px;
  }
}

/* Extra Small Phones (max-width: 400px e.g. iPhone SE, compact Android) */
@media (max-width: 400px) {
  .shell {
    width: calc(100% - 16px);
  }

  .brand strong {
    font-size: 15px;
  }

  .brand small {
    display: none;
  }

  .class-table-row b {
    display: none;
  }

  .class-card {
    padding: 8px 4px;
  }

  .class-title {
    font-size: 12px;
  }

  .class-subtitle {
    display: none;
  }

  .version-pill {
    font-size: 10.5px;
    padding: 5px 2px;
  }

  .version-pill .flag {
    display: none;
  }
}

/* KaTeX Mathematical Formulas Styling */
.katex-display {
  margin: 14px 0 !important;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 6px 0;
}

.katex {
  font-size: 1.1em !important;
  text-rendering: auto;
}

/* Print Stylesheet */
@media print {
  .glow,
  .topbar,
  .class-navigation,
  .ask-card,
  .empty-state,
  .sources-card,
  .answer-learning-tools,
  .card-heading-actions,
  dialog {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .shell {
    width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }
}

/* THEME TOGGLE BUTTON */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-size: 17px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
}

.theme-toggle-btn:hover {
  border-color: var(--green);
  transform: scale(1.08);
  box-shadow: 0 4px 14px rgba(11, 107, 79, 0.22);
}

/* FOLLOW-UP QUESTIONS (CONVERSATIONAL STREAM) */
.followup-box {
  margin-top: 26px;
  padding: 22px 24px;
  background: linear-gradient(135deg, rgba(240, 253, 244, 0.9) 0%, rgba(236, 253, 245, 0.6) 100%);
  border: 1.5px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.06);
  position: relative;
  backdrop-filter: blur(10px);
}

.followup-title {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.followup-title span {
  font-size: 15px;
  font-weight: 700;
  color: var(--green-dark);
  display: flex;
  align-items: center;
  gap: 6px;
}

.followup-title small {
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 500;
}

.followup-stream {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 4px;
}

.followup-msg {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  animation: fadeIn 0.25s ease;
}

.followup-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 14px;
  background: #ffffff;
  border: 1.5px solid var(--green-border);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
  flex-shrink: 0;
  margin-top: 2px;
}

.followup-bubble {
  flex: 1;
  padding: 13px 18px;
  border-radius: 18px;
  font-size: 14.5px;
  line-height: 1.7;
}

.followup-msg.user-msg .followup-bubble {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(11, 107, 79, 0.08));
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--ink);
  font-weight: 500;
}

.followup-msg.ai-msg .followup-bubble {
  background: #ffffff;
  border: 1px solid rgba(11, 107, 79, 0.12);
  color: var(--ink);
  box-shadow: 0 4px 14px rgba(11, 34, 26, 0.04);
}

.followup-loading {
  color: var(--muted);
  font-style: italic;
  font-size: 13.5px;
}

.followup-form {
  display: flex;
  gap: 10px;
  align-items: center;
  width: 100%;
}

.followup-form input {
  flex: 1;
  width: 100%;
  min-width: 0;
  height: 48px;
  padding: 0 20px;
  border: 1.5px solid rgba(11, 107, 79, 0.22);
  border-radius: var(--radius-full);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  font-size: 14.5px;
  outline: none;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.03);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.followup-form input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.15), inset 0 1px 2px rgba(0, 0, 0, 0.02);
}

.followup-form input::placeholder {
  color: var(--muted-light);
  font-size: 13.5px;
}

.followup-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 48px;
  padding: 0 22px;
  border-radius: var(--radius-full);
  border: 0;
  background: linear-gradient(135deg, #0b6b4f 0%, #10b981 100%);
  color: #ffffff;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(11, 107, 79, 0.25);
  flex-shrink: 0;
}

.followup-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(11, 107, 79, 0.35);
  filter: brightness(1.06);
}

.followup-submit-btn:active {
  transform: translateY(0);
}

/* QUIZ & FLASHCARD TRIGGERS & MODALS */
.filter-field-quiz {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.interactive-btns-row {
  display: flex;
  gap: 8px;
  width: 100%;
}

.quiz-trigger-btn,
.flashcard-trigger-btn {
  height: 48px;
  flex: 1;
  border: 1.5px solid #10b981;
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  color: #065f46;
  border-radius: var(--radius-md);
  font: inherit;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  padding: 0 10px;
}
.exam-trigger-btn { border: 1px solid #c7d9ea; background: #edf6ff; color: #175d91; border-radius: var(--radius-sm); padding: 9px 12px; font: inherit; font-size: 13px; font-weight: 700; cursor: pointer; }
.exam-trigger-btn:hover { background: #175d91; color: #fff; }
.mock-trigger-btn,.cq-trigger-btn { border: 1px solid #e7d4a6; background: #fff8e7; color: #8a6010; border-radius: var(--radius-sm); padding: 9px 12px; font: inherit; font-size: 13px; font-weight: 700; cursor: pointer; }
.mock-trigger-btn:hover,.cq-trigger-btn:hover { background:#8a6010;color:#fff; }
.progress-dialog { width: min(720px, calc(100% - 24px)); }
.progress-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 12px 0 22px; }
.progress-stats > div { padding: 14px; border: 1px solid var(--green-border); border-radius: var(--radius-sm); background: var(--green-soft); }.progress-stats strong,.progress-stats span{display:block}.progress-stats strong{font-size:22px;color:var(--green)}.progress-stats span{font-size:12px;color:var(--muted)}
.progress-section { margin-top: 20px; }.progress-section h3{font-size:15px;margin:0 0 9px}.progress-row{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:13px}.progress-row strong{margin-left:auto;color:var(--green)}.progress-bar{width:120px;height:7px;border-radius:99px;background:#e5ece8;overflow:hidden}.progress-bar i{display:block;height:100%;background:var(--green);border-radius:inherit}
.progress-section h4{margin:1.1rem 0 .55rem;color:var(--muted);font-size:.84rem}.progress-row.weak-topic{background:#fff8e8;border-color:#f4d890}

.flashcard-trigger-btn {
  border-color: #3b82f6;
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  color: #1e40af;
}

.quiz-trigger-btn:hover {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #ffffff;
  border-color: #059669;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.3);
}

.flashcard-trigger-btn:hover {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: #ffffff;
  border-color: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.3);
}

/* Refined study dashboard and revision controls */
.study-summary { display:grid; grid-template-columns:repeat(4,minmax(92px,1fr)) auto auto auto; gap:9px; padding:12px; border:1px solid rgba(13,125,91,.16); background:linear-gradient(110deg,rgba(236,248,241,.94),rgba(247,252,249,.9)); box-shadow:0 12px 30px rgba(12,87,61,.06); }
.study-summary > div { display:flex; flex-direction:column; justify-content:center; min-height:50px; gap:2px; padding:7px 11px; border-radius:12px; background:rgba(255,255,255,.72); }.study-summary strong{font-size:18px;letter-spacing:-.3px}.study-summary button{margin-left:0;padding:9px 11px;border:1px solid transparent;border-radius:11px;background:transparent;white-space:nowrap;transition:transform .18s ease,background .18s ease,box-shadow .18s ease}.study-summary button:hover{transform:translateY(-1px);background:#fff;box-shadow:0 5px 14px rgba(10,93,66,.1)}.study-summary #openStudyPlanBtn{color:#fff;background:linear-gradient(135deg,#087d5b,#055c46);box-shadow:0 5px 13px rgba(5,92,70,.18)}
.filter-field-quiz{position:relative;overflow:hidden;padding:12px;border:1px solid rgba(13,125,91,.12);border-radius:16px;background:linear-gradient(145deg,#f7fcf9,#eef8f3)}.filter-field-quiz::after{content:"✦";position:absolute;right:12px;top:7px;color:rgba(7,125,91,.18);font-size:42px;line-height:1;pointer-events:none}.filter-field-quiz .field-label{margin-bottom:10px}.interactive-btns-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.interactive-btns-row>button{display:flex;align-items:center;min-height:60px;height:auto;gap:8px;padding:8px 9px;border-radius:12px;text-align:left;white-space:normal;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}.interactive-btns-row>button:last-child{grid-column:span 2}.interactive-btns-row>button:hover{transform:translateY(-2px);box-shadow:0 8px 16px rgba(11,80,61,.14)}.interactive-btns-row>button>span:last-child{display:grid;gap:1px}.interactive-btns-row b{font-size:12px;line-height:1.12}.interactive-btns-row small{color:currentColor;opacity:.68;font-size:10px;line-height:1.1}.practice-icon{display:grid;place-items:center;flex:0 0 31px;width:31px;height:31px;border-radius:10px;background:rgba(255,255,255,.7);font-size:16px}.quiz-trigger-btn{background:linear-gradient(135deg,#eafbf4,#d7f5e7)}.exam-trigger-btn{background:linear-gradient(135deg,#eef7ff,#dbeeff)}.mock-trigger-btn{background:linear-gradient(135deg,#fff8e7,#ffefbf)}.cq-trigger-btn{background:linear-gradient(135deg,#fff5ed,#ffe5d3);color:#a14e18;border-color:#f2c49f}.flashcard-trigger-btn{background:linear-gradient(135deg,#eff5ff,#dce9ff)}
.practice-studio{margin:-4px 0 20px}.practice-studio .interactive-btns-row{grid-template-columns:repeat(5,minmax(0,1fr));gap:9px}.practice-studio .interactive-btns-row>button{min-height:64px}.practice-studio .interactive-btns-row>button:last-child{grid-column:auto}@media (max-width:860px){.practice-studio .interactive-btns-row{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:560px){.practice-studio .interactive-btns-row{grid-template-columns:repeat(2,minmax(0,1fr))}.practice-studio .interactive-btns-row>button:last-child{grid-column:span 2}}
.practice-panel-v2{margin:0 0 20px;padding:14px 16px 16px;border:1px solid #d8eae1;border-radius:18px;background:linear-gradient(135deg,#f4fbf7,#eef8f3);box-shadow:0 8px 24px rgba(7,93,66,.05)}.practice-panel-head{display:flex;align-items:center;gap:9px;margin-bottom:12px}.practice-panel-head>span{display:grid;place-items:center;width:31px;height:31px;border-radius:10px;background:#dff3e8;font-size:16px}.practice-panel-head strong,.practice-panel-head small{display:block}.practice-panel-head strong{color:#173d30;font-size:14px}.practice-panel-head small{margin-top:1px;color:#729084;font-size:11px}.practice-action-grid{display:grid!important;grid-template-columns:repeat(5,minmax(0,1fr))!important;gap:9px!important}.practice-action-grid .practice-action{display:flex!important;align-items:center!important;min-width:0!important;min-height:68px!important;height:auto!important;gap:9px!important;padding:10px!important;border:1px solid #d8e9e1!important;border-radius:13px!important;background:#fff!important;color:#174c3a!important;text-align:left!important;white-space:normal!important;box-shadow:0 2px 5px rgba(12,75,57,.04)!important}.practice-action-grid .practice-action:hover{transform:translateY(-2px)!important;box-shadow:0 8px 16px rgba(12,75,57,.12)!important}.practice-action-grid .practice-action>span:last-child{display:grid!important;gap:2px!important}.practice-action-grid .practice-action b{font-size:12px!important}.practice-action-grid .practice-action small{font-size:10px!important;color:#70867c!important}.practice-action-grid .practice-icon{flex:0 0 33px!important;width:33px!important;height:33px!important;background:#eff8f3!important}.practice-action-grid .mock-trigger-btn{background:#fffbef!important;border-color:#f1dfae!important}.practice-action-grid .cq-trigger-btn{background:#fff7f1!important;border-color:#f1d2bb!important}.practice-action-grid .flashcard-trigger-btn{background:#f3f7ff!important;border-color:#d4e0f7!important}@media (max-width:900px){.practice-action-grid{grid-template-columns:repeat(3,minmax(0,1fr))!important}}@media (max-width:600px){.practice-action-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}.practice-action-grid .practice-action:last-child{grid-column:span 2!important}}
@media (max-width:980px){.study-summary{grid-template-columns:repeat(4,minmax(78px,1fr))}.study-summary button{grid-column:span 1;padding-inline:8px;font-size:11px}}@media (max-width:680px){.study-summary{grid-template-columns:repeat(2,1fr)}.study-summary button{grid-column:span 1;text-align:left}.interactive-btns-row{grid-template-columns:repeat(2,minmax(0,1fr))}}

.quiz-dialog {
  width: min(680px, calc(100% - 24px));
  border-radius: var(--radius-xl);
  padding: 26px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-elevated);
  color: var(--ink);
}

.quiz-header {
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.quiz-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--green);
  background: var(--green-light);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 6px;
}

.quiz-header h3 {
  margin: 0 0 12px 0;
  font-size: 18px;
  color: var(--ink);
}

.quiz-progress-bar {
  width: 100%;
  height: 7px;
  background: var(--line-strong);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.quiz-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--green), #10b981);
  transition: width 0.35s ease;
}

.quiz-meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--muted);
}

.quiz-loading {
  text-align: center;
  padding: 40px 20px;
  font-size: 15px;
  color: var(--muted);
}

.quiz-question-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 18px;
  line-height: 1.5;
}

.quiz-options-list {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.quiz-option-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius-md);
  font: inherit;
  font-size: 15px;
  text-align: left;
  cursor: pointer;
  transition: all 0.18s ease;
}

.quiz-option-btn:hover:not(:disabled) {
  border-color: var(--green);
  background: var(--green-soft);
  transform: translateX(3px);
}

.option-badge {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--green-light);
  color: var(--green);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
}

.quiz-option-btn.is-correct {
  background: #ecfdf5 !important;
  border-color: #10b981 !important;
  color: #065f46 !important;
  font-weight: 700;
}

.quiz-option-btn.is-correct .option-badge {
  background: #10b981 !important;
  color: #ffffff !important;
}

.quiz-option-btn.is-wrong {
  background: #fef2f2 !important;
  border-color: #ef4444 !important;
  color: #991b1b !important;
}
.quiz-option-btn.is-selected { border-color: #175d91; background: #edf6ff; }

.quiz-option-btn.is-wrong .option-badge {
  background: #ef4444 !important;
  color: #ffffff !important;
}

.quiz-explanation-box {
  background: var(--green-soft);
  border: 1px solid var(--green-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 18px;
}

.feedback-badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 700;
  margin-bottom: 6px;
}

.feedback-badge.correct {
  background: #10b981;
  color: #fff;
}

.feedback-badge.wrong {
  background: #ef4444;
  color: #fff;
}

.quiz-explanation-box p {
  margin: 6px 0;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.6;
}

.quiz-explanation-box small {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.quiz-next-btn {
  width: 100%;
  height: 46px;
  border: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--green), var(--green-hover));
  color: #fff;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quiz-next-btn:hover {
  box-shadow: 0 4px 14px rgba(11, 107, 79, 0.3);
}

.quiz-result-card {
  text-align: center;
  padding: 24px 12px;
}

.quiz-result-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.quiz-result-card h3 {
  font-size: 22px;
  color: var(--ink);
  margin: 0 0 10px 0;
}

.quiz-result-score {
  font-size: 20px;
  font-weight: 800;
  color: var(--green);
  margin: 0 0 10px 0;
}

.quiz-result-msg {
  font-size: 15px;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto 24px auto;
  line-height: 1.6;
}

.quiz-result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.quiz-retry-btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--green);
  background: var(--green-light);
  color: var(--green);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.quiz-retry-btn:hover {
  background: var(--green);
  color: #fff;
}

.quiz-done-btn {
  padding: 10px 24px;
  border-radius: var(--radius-md);
  border: 0;
  background: var(--ink-light);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

/* ========================================================
   🗂️ 3D FLASHCARDS MODAL & ANIMATIONS
   ======================================================== */
.flashcard-dialog {
  width: min(640px, calc(100% - 24px));
  border-radius: var(--radius-xl);
  padding: 26px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-elevated);
  color: var(--ink);
}

.flashcard-header {
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.flashcard-header h3 {
  margin: 0 0 10px 0;
  font-size: 18px;
  color: var(--ink);
}

.flashcard-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}

.flashcard-hint-text {
  font-size: 12px;
  color: var(--green);
  font-weight: 600;
}

.flashcard-stage {
  perspective: 1200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 10px 0;
}

.flashcard-card {
  width: 100%;
  min-height: 250px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

.flashcard-card.is-flipped {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  border: 1.5px solid var(--green-border);
}

.flashcard-front {
  background: linear-gradient(145deg, var(--paper-solid), #f3faf6);
  color: var(--ink);
}

.flashcard-back {
  background: linear-gradient(145deg, #f0fdf4, #e6f7ef);
  color: var(--ink);
  transform: rotateY(180deg);
  border-color: var(--green);
}

.flashcard-face-tag {
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--green);
  margin-bottom: 12px;
}

.flashcard-text {
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--ink);
  font-weight: 600;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.flashcard-flip-hint {
  font-size: 12px;
  color: var(--muted);
  text-align: right;
  margin-top: 14px;
}

.flashcard-face small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 8px;
}

.flashcard-controls {
  display: flex;
  gap: 12px;
  width: 100%;
  justify-content: space-between;
  align-items: center;
}

.flashcard-nav-btn {
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.flashcard-nav-btn:hover:not(:disabled) {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-soft);
}

.flashcard-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.flashcard-flip-btn {
  padding: 10px 22px;
  border-radius: var(--radius-md);
  border: 0;
  background: linear-gradient(135deg, var(--green), var(--green-hover));
  color: #ffffff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(11, 107, 79, 0.2);
}

.flashcard-flip-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(11, 107, 79, 0.35);
}

/* ========================================================
   🌙 DARK MODE PALETTE & OVERRIDES (HIGH CONTRAST & CLEAN)
   ======================================================== */
[data-theme="dark"] {
  --bg: #071510;
  --paper: #0c1f19;
  --paper-solid: #0e241d;
  --ink: #f0faf5;
  --ink-light: #c2e5d7;
  --muted: #8bb3a1;
  --muted-light: #648a79;
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(52, 211, 153, 0.3);
  --green: #10b981;
  --green-hover: #059669;
  --green-dark: #34d399;
  --green-light: rgba(16, 185, 129, 0.18);
  --green-soft: rgba(16, 185, 129, 0.1);
  --green-border: rgba(52, 211, 153, 0.3);
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.5);
  --shadow-elevated: 0 12px 36px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] body {
  background: radial-gradient(circle at 10% 0%, rgba(16, 185, 129, 0.08), transparent 35%),
              linear-gradient(135deg, #07140f 0%, #0a1c15 100%);
  color: var(--ink);
}

[data-theme="dark"] .hero h1 {
  color: #ffffff;
}

[data-theme="dark"] .hero h1 em {
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .hero-copy {
  color: #a7cfbe;
}

[data-theme="dark"] .ask-card,
[data-theme="dark"] .answer-card,
[data-theme="dark"] .sources-card {
  background: #0d221b;
  border-color: rgba(52, 211, 153, 0.22);
  color: var(--ink);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
}

[data-theme="dark"] .card-heading p,
[data-theme="dark"] .sources-heading p {
  color: #ffffff !important;
}

[data-theme="dark"] .card-heading small,
[data-theme="dark"] .sources-heading small {
  color: #8bb3a1 !important;
}

[data-theme="dark"] .answer-text {
  color: #f3fcf8 !important;
}

[data-theme="dark"] .answer-text strong {
  color: #34d399 !important;
}

[data-theme="dark"] .source-item {
  background: #091a14;
  border-color: rgba(255, 255, 255, 0.09);
  color: var(--ink);
}

[data-theme="dark"] .source-item:hover {
  background: #0d251d;
  border-color: #10b981;
}

[data-theme="dark"] .source-item strong {
  color: #34d399 !important;
}

[data-theme="dark"] .source-item p {
  color: #b0d4c5 !important;
}

[data-theme="dark"] .source-item span {
  color: #34d399 !important;
}

[data-theme="dark"] .raw-quote-box,
[data-theme="dark"] .book-quote-box {
  background: #06130e !important;
  border-color: rgba(52, 211, 153, 0.3) !important;
  color: #e6f7ef !important;
}

[data-theme="dark"] .raw-quote-box p,
[data-theme="dark"] .book-quote-box p {
  color: #d1fae5 !important;
}

[data-theme="dark"] .action-btn {
  background: #091a14 !important;
  border-color: rgba(52, 211, 153, 0.25) !important;
  color: #d1fae5 !important;
}

[data-theme="dark"] .action-btn:hover {
  background: #10b981 !important;
  color: #ffffff !important;
  border-color: #10b981 !important;
}

[data-theme="dark"] .audio-bar {
  background: #071510 !important;
  border-color: rgba(52, 211, 153, 0.35) !important;
  color: #e6f7ef !important;
}

[data-theme="dark"] .audio-label {
  color: #34d399 !important;
}

[data-theme="dark"] .stat-pill,
[data-theme="dark"] .stats-card {
  background: #0c2019;
  border-color: rgba(255, 255, 255, 0.09);
  color: var(--ink);
}

[data-theme="dark"] .stat-pill strong {
  color: #34d399;
}

[data-theme="dark"] .class-card {
  background: #0a1914;
  border-color: rgba(255, 255, 255, 0.09);
  color: #f0faf5;
}

[data-theme="dark"] .class-card .class-subtitle {
  color: #8bb3a1;
}

[data-theme="dark"] .class-card.active {
  background: linear-gradient(135deg, #059669 0%, #047857 100%);
  color: #ffffff;
}

[data-theme="dark"] .subject-chip {
  background: #091913;
  border-color: rgba(52, 211, 153, 0.2);
  color: #c5ead9;
}

[data-theme="dark"] .subject-chip:hover {
  background: #0e2920;
  color: #34d399;
  border-color: #34d399;
}

[data-theme="dark"] .subject-chip.active {
  background: #10b981;
  color: #ffffff;
  border-color: #10b981;
}

[data-theme="dark"] .followup-box {
  background: #071711 !important;
  border-color: rgba(52, 211, 153, 0.3) !important;
}

[data-theme="dark"] .followup-title span {
  color: #34d399 !important;
}

[data-theme="dark"] .followup-title small {
  color: #8bb3a1 !important;
}

[data-theme="dark"] .followup-msg.ai-msg .followup-bubble {
  background: #0d221b !important;
  color: #f3fcf8 !important;
  border-color: rgba(52, 211, 153, 0.2) !important;
}

[data-theme="dark"] .followup-msg.user-msg .followup-bubble {
  background: rgba(16, 185, 129, 0.22) !important;
  color: #ffffff !important;
  border-color: rgba(52, 211, 153, 0.45) !important;
}

[data-theme="dark"] select,
[data-theme="dark"] textarea,
[data-theme="dark"] .question-box-wrapper,
[data-theme="dark"] .quiz-option-btn,
[data-theme="dark"] .learning-item,
[data-theme="dark"] #personalNote,
[data-theme="dark"] .account-form input {
  background: #071610 !important;
  color: #f0faf5 !important;
  border-color: rgba(255, 255, 255, 0.12) !important;
}

[data-theme="dark"] select option {
  background: #0d221b;
  color: #f0faf5;
}

[data-theme="dark"] .status-pill {
  background: rgba(12, 31, 25, 0.9);
  color: #e6f7ef;
}

[data-theme="dark"] .version-pills {
  background: rgba(9, 23, 18, 0.85);
}

[data-theme="dark"] .version-pill {
  background: #0a1c16;
  color: #c5ead9;
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .version-pill.active {
  background: #10b981;
  color: #ffffff;
}

[data-theme="dark"] .citation-tag {
  background: rgba(16, 185, 129, 0.18) !important;
  color: #34d399 !important;
  border-color: rgba(52, 211, 153, 0.4) !important;
}

[data-theme="dark"] .quiz-trigger-btn {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(5, 150, 105, 0.25) 100%);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.4);
}

[data-theme="dark"] .flashcard-trigger-btn {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(37, 99, 235, 0.25) 100%);
  color: #60a5fa;
  border-color: rgba(59, 130, 246, 0.4);
}

[data-theme="dark"] .flashcard-front {
  background: linear-gradient(145deg, #0d1e19, #091512);
  color: #f0faf5;
}

[data-theme="dark"] .flashcard-back {
  background: linear-gradient(145deg, #0e271f, #0a1f18);
  border-color: #10b981;
  color: #f0faf5;
}

[data-theme="dark"] .example-btn {
  background: rgba(16, 185, 129, 0.1);
  color: #9fccb8;
  border-color: rgba(52, 211, 153, 0.2);
}

[data-theme="dark"] .glow-one {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, transparent 70%);
}

[data-theme="dark"] .glow-two {
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08) 0%, transparent 70%);
}

@media (max-width: 860px) {
  .filters-grid {
    grid-template-columns: 1fr;
  }
}