:root,
[data-theme="dark"] {
  --bg-main: #0b1120;
  --bg-card: #151f32;
  --bg-card-elevated: #1e293b;
  --bg-subtle: rgba(255, 255, 255, 0.04);
  --border-color: rgba(148, 163, 184, 0.16);
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --primary: #38bdf8;
  --primary-dark: #0284c7;
  --primary-glow: rgba(56, 189, 248, 0.18);
  --accent: #a855f7;
  --accent-glow: rgba(168, 85, 247, 0.18);
  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.14);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.14);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --shadow-card: 0 8px 24px -4px rgba(0, 0, 0, 0.45);
}

[data-theme="light"] {
  --bg-main: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-elevated: #f8fafc;
  --bg-subtle: rgba(15, 23, 42, 0.04);
  --border-color: rgba(15, 23, 42, 0.12);
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --primary: #0284c7;
  --primary-dark: #0369a1;
  --primary-glow: rgba(2, 132, 199, 0.12);
  --accent: #7e22ce;
  --accent-glow: rgba(126, 34, 206, 0.12);
  --success: #16a34a;
  --success-bg: rgba(22, 163, 74, 0.12);
  --danger: #dc2626;
  --danger-bg: rgba(220, 38, 38, 0.12);
  --warning: #d97706;
  --warning-bg: rgba(217, 119, 6, 0.14);
  --shadow-card: 0 6px 20px -4px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Noto Sans Sinhala', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

.app-shell {
  max-width: 720px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.hidden {
  display: none !important;
}

/* ================= TOP HEADER ================= */
.top-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-text h1 {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.2;
  display: flex;
  align-items: center;
  gap: 6px;
}

.badge-sl {
  font-size: 0.68rem;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--primary-glow);
  color: var(--primary);
  border: 1px solid var(--primary);
}

.brand-text p {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card-elevated);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.15s, background 0.15s;
}

.icon-btn:active {
  transform: scale(0.94);
}

.pill-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: var(--bg-card-elevated);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.8rem;
  cursor: pointer;
}

/* ================= VIEWS ================= */
.view {
  flex: 1;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ================= HERO CARD ================= */
.hero-card {
  background: linear-gradient(145deg, var(--bg-card), var(--bg-card-elevated));
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.hero-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--primary-glow);
  color: var(--primary);
  margin-bottom: 8px;
}

.hero-card h2 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.hero-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 14px;
}

.stat-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 10px 8px;
  text-align: center;
}

.stat-val {
  display: block;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary);
}

.stat-lbl {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.quick-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 480px) {
  .quick-actions {
    grid-template-columns: 1fr;
  }
}

.quick-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: var(--text-primary);
  transition: transform 0.15s, border-color 0.2s;
}

.quick-btn.primary {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.16), rgba(2, 132, 199, 0.08));
  border-color: rgba(56, 189, 248, 0.35);
}

.quick-btn.accent {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.16), rgba(126, 34, 206, 0.08));
  border-color: rgba(168, 85, 247, 0.35);
}

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

.q-icon {
  font-size: 1.5rem;
}

.q-text strong {
  display: block;
  font-size: 0.86rem;
}

.q-text small {
  font-size: 0.74rem;
  color: var(--text-muted);
}

/* ================= MODE EXPLAINER ================= */
.mode-explainer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 540px) {
  .mode-explainer {
    grid-template-columns: 1fr;
  }
}

.mode-chip {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  border-radius: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}

.chip-icon {
  font-size: 1.35rem;
  line-height: 1;
  margin-top: 2px;
}

.mode-chip strong {
  display: block;
  font-size: 0.84rem;
  margin-bottom: 2px;
}

.mode-chip p {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ================= SEARCH & FILTER CONTROLS ================= */
.controls-bar {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
}

.search-box input {
  width: 100%;
  padding: 11px 38px 11px 40px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.88rem;
  outline: none;
}

.search-box input:focus {
  border-color: var(--primary);
}

.clear-btn {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
}

.filter-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

.filter-tabs::-webkit-scrollbar {
  display: none;
}

.filter-tab {
  white-space: nowrap;
  padding: 7px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-tab.active {
  background: var(--primary);
  color: #0b1120;
  border-color: var(--primary);
  font-weight: 700;
}

/* ================= PAPERS GRID ================= */
.papers-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.paper-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s;
}

.paper-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
}

.paper-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.paper-num-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 9px;
  border-radius: 8px;
  font-size: 0.73rem;
  font-weight: 800;
  background: var(--primary-glow);
  color: var(--primary);
  margin-bottom: 4px;
}

.paper-title {
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.3;
}

.paper-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.paper-score-badge {
  padding: 4px 10px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--success-bg);
  color: var(--success);
  white-space: nowrap;
}

.paper-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-pill {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.paper-mode-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.mode-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 11px 12px;
  border-radius: 12px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s, filter 0.15s;
}

.mode-btn:active {
  transform: scale(0.97);
}

.mode-btn.exam-btn {
  background: linear-gradient(135deg, #0284c7, #2563eb);
  color: #ffffff;
}

.mode-btn.test-btn {
  background: var(--bg-card-elevated);
  border-color: var(--primary);
  color: var(--primary);
}

/* ================= QUIZ VIEW ================= */
#quizView {
  padding-bottom: 84px;
}

.quiz-subheader {
  position: sticky;
  top: 63px;
  z-index: 30;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 10px 12px;
  box-shadow: var(--shadow-card);
}

.quiz-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.quiz-mode-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--bg-subtle);
}

.timer-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border-radius: 20px;
  background: var(--warning-bg);
  color: var(--warning);
  font-weight: 800;
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
}

.timer-pill.urgent {
  background: var(--danger-bg);
  color: var(--danger);
  animation: pulseUrgent 1s infinite;
}

@keyframes pulseUrgent {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.timer-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

.live-score-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  font-size: 0.84rem;
}

.palette-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card-elevated);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
}

.progress-track {
  width: 100%;
  height: 6px;
  background: var(--bg-subtle);
  border-radius: 99px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 99px;
  transition: width 0.25s ease;
}

/* ================= QUESTION CONTAINER ================= */
.question-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.q-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.q-badge-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.q-number-badge {
  font-size: 0.86rem;
  font-weight: 800;
  padding: 4px 11px;
  border-radius: 8px;
  background: var(--primary);
  color: #0b1120;
}

.q-paper-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}

.q-actions-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tool-chip {
  padding: 5px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.tool-chip.flagged {
  background: var(--warning-bg);
  color: var(--warning);
  border-color: var(--warning);
}

.q-instruction-box {
  background: var(--bg-card-elevated);
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.inst-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.inst-content {
  white-space: pre-line;
}

.q-diagram-card {
  background: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: 14px;
  padding: 10px;
  text-align: center;
}

.diagram-img-wrapper {
  position: relative;
  cursor: zoom-in;
  display: inline-block;
  max-width: 100%;
}

.diagram-img-wrapper img {
  max-width: 100%;
  max-height: 360px;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
}

.zoom-hint {
  display: inline-block;
  margin-top: 6px;
  font-size: 0.72rem;
  color: #475569;
  font-weight: 600;
}

.q-stem-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow-card);
}

.q-stem-text {
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.65;
  white-space: pre-line;
}

/* ================= OPTIONS LIST ================= */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 13px 15px;
  border-radius: 14px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
}

.option-btn:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--bg-card-elevated);
}

.option-btn:active:not(:disabled) {
  transform: scale(0.99);
}

.opt-label {
  min-width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.84rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.opt-text {
  flex: 1;
  line-height: 1.45;
}

.opt-status-icon {
  font-size: 1.1rem;
  margin-left: auto;
}

/* Option States */
.option-btn.selected {
  border-color: var(--primary);
  background: var(--primary-glow);
}

.option-btn.selected .opt-label {
  background: var(--primary);
  color: #0b1120;
  border-color: var(--primary);
}

.option-btn.correct {
  border-color: var(--success);
  background: var(--success-bg);
}

.option-btn.correct .opt-label {
  background: var(--success);
  color: #ffffff;
  border-color: var(--success);
}

.option-btn.wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.option-btn.wrong .opt-label {
  background: var(--danger);
  color: #ffffff;
  border-color: var(--danger);
}

/* ================= DIRECT INPUT ================= */
.direct-input-box {
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: 14px;
  padding: 12px 14px;
}

.direct-input-box label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.direct-input-row {
  display: flex;
  gap: 8px;
}

.direct-input-row input {
  flex: 1;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card-elevated);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
}

.btn-secondary {
  padding: 9px 14px;
  border-radius: 10px;
  border: 1px solid var(--primary);
  background: var(--primary-glow);
  color: var(--primary);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
}

/* ================= INSTANT FEEDBACK CARD ================= */
.feedback-card {
  border-radius: 16px;
  padding: 15px 16px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-card-elevated);
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.feedback-card.is-correct {
  border-color: var(--success);
  background: var(--success-bg);
}

.feedback-card.is-wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.feedback-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.96rem;
  margin-bottom: 6px;
}

.feedback-answer-line {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feedback-explanation {
  font-size: 0.86rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  line-height: 1.55;
}

/* ================= STICKY QUIZ FOOTER ================= */
.quiz-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 35;
  max-width: 720px;
  margin: 0 auto;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.nav-btn {
  padding: 11px 16px;
  border-radius: 12px;
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.12s;
}

.nav-btn:active:not(:disabled) {
  transform: scale(0.96);
}

.nav-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.nav-btn.primary {
  background: var(--primary);
  color: #0b1120;
}

.nav-btn.secondary {
  background: var(--bg-card-elevated);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.nav-btn.danger {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger);
}

.nav-btn.ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 10px;
}

/* ================= RESULTS VIEW ================= */
.results-hero-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 22px 18px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.results-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--primary-glow);
  color: var(--primary);
  margin-bottom: 6px;
}

.results-hero-card h2 {
  font-size: 1.15rem;
  margin-bottom: 16px;
}

.score-circle-wrap {
  position: relative;
  width: 148px;
  height: 148px;
  margin: 0 auto 14px;
}

.score-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: var(--bg-subtle);
  stroke-width: 10;
}

.ring-fill {
  fill: none;
  stroke: var(--primary);
  stroke-width: 10;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.8s ease;
}

.score-center-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.score-pct {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.1;
}

.score-fraction {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.grade-pill {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--success-bg);
  color: var(--success);
  margin-bottom: 16px;
}

.results-metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}

@media (max-width: 440px) {
  .results-metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.metric-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 10px 6px;
}

.m-val {
  display: block;
  font-size: 1.15rem;
  font-weight: 800;
}

.m-lbl {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.results-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.results-actions-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.action-btn {
  padding: 12px 16px;
  border-radius: 12px;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
}

.action-btn.primary {
  background: var(--primary);
  color: #0b1120;
}

.action-btn.secondary {
  background: var(--bg-card-elevated);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.action-btn.accent {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--text-primary);
}

.action-btn.danger {
  background: var(--danger);
  color: #ffffff;
}

.full-width {
  width: 100%;
}

/* ================= REVIEW LIST ================= */
.review-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.review-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.review-filter-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.r-tab {
  padding: 6px 13px;
  border-radius: 18px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.r-tab.active {
  background: var(--primary);
  color: #0b1120;
  border-color: var(--primary);
  font-weight: 700;
}

.review-questions-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.review-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.review-item.status-correct {
  border-left: 4px solid var(--success);
}

.review-item.status-wrong {
  border-left: 4px solid var(--danger);
}

.review-item.status-skipped {
  border-left: 4px solid var(--warning);
}

.review-item-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 700;
}

.review-q-text {
  font-size: 0.92rem;
  font-weight: 600;
  white-space: pre-line;
}

.review-ans-compare {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.82rem;
}

.ans-pill {
  padding: 4px 10px;
  border-radius: 8px;
  font-weight: 600;
}

.ans-pill.user-correct {
  background: var(--success-bg);
  color: var(--success);
}

.ans-pill.user-wrong {
  background: var(--danger-bg);
  color: var(--danger);
}

.ans-pill.user-skipped {
  background: var(--warning-bg);
  color: var(--warning);
}

.ans-pill.official {
  background: var(--primary-glow);
  color: var(--primary);
}

.review-exp {
  font-size: 0.82rem;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  padding: 9px 11px;
  border-radius: 10px;
}

/* ================= MODALS ================= */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(0, 0, 0, 0.72);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.modal-sheet {
  width: 100%;
  max-width: 720px;
  max-height: 82vh;
  background: var(--bg-card);
  border-top-left-radius: 22px;
  border-top-right-radius: 22px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1rem;
}

.modal-header p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.palette-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.palette-legend span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot.answered { background: var(--success); }
.dot.current { background: var(--primary); }
.dot.flagged { background: var(--warning); }
.dot.unanswered { background: var(--border-color); }

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(46px, 1fr));
  gap: 8px;
  overflow-y: auto;
  padding: 4px 2px;
  max-height: 48vh;
}

.p-cell {
  height: 42px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card-elevated);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.84rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.p-cell.answered {
  background: var(--success-bg);
  border-color: var(--success);
  color: var(--success);
}

.p-cell.wrong-cell {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger);
}

.p-cell.current {
  outline: 2px solid var(--primary);
  font-weight: 800;
}

.p-cell.flagged::after {
  content: "🚩";
  position: absolute;
  top: -4px;
  right: -2px;
  font-size: 0.65rem;
}

/* Lightbox Modal */
.lightbox-backdrop {
  align-items: center;
  padding: 12px;
}

.lightbox-container {
  width: 100%;
  max-width: 900px;
  max-height: 92vh;
  background: var(--bg-card);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.lightbox-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 700;
  font-size: 0.88rem;
}

.lightbox-body {
  overflow: auto;
  padding: 10px;
  background: #ffffff;
  text-align: center;
}

.lightbox-body img {
  max-width: 100%;
  height: auto;
}

/* Dialog Modal */
.modal-dialog {
  margin: auto 16px;
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dialog-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 6px;
}

/* Search Results Section */
.search-results-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 14px;
}

.section-header h3 {
  font-size: 0.92rem;
  margin-bottom: 10px;
  color: var(--primary);
}

.search-results-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 340px;
  overflow-y: auto;
}

.search-hit-card {
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--bg-card-elevated);
  border: 1px solid var(--border-color);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.search-hit-card:hover {
  border-color: var(--primary);
}

.search-hit-meta {
  font-size: 0.73rem;
  color: var(--primary);
  font-weight: 700;
}

.search-hit-text {
  font-size: 0.84rem;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}


/* ================= RS. 1500 PAYWALL & PREMIUM STYLES ================= */
.premium-pill {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(234, 88, 12, 0.15));
  border-color: rgba(245, 158, 11, 0.5);
  color: var(--warning);
}

.premium-pill.unlocked {
  background: var(--success-bg);
  border-color: var(--success);
  color: var(--success);
}

.premium-promo-banner {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.16), rgba(168, 85, 247, 0.14));
  border: 1.5px solid rgba(245, 158, 11, 0.45);
  border-radius: 18px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-card);
}

.promo-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(245, 158, 11, 0.22);
  color: var(--warning);
  margin-bottom: 6px;
}

.promo-left h3 {
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 4px;
}

.promo-left p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.promo-cta-btn {
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, #f59e0b, #ea580c);
  color: #ffffff;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}

.paper-card.locked-paper {
  border-color: rgba(245, 158, 11, 0.28);
  position: relative;
}

.paper-free-badge {
  padding: 4px 10px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
  white-space: nowrap;
}

.paper-lock-badge {
  padding: 4px 10px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.45);
  white-space: nowrap;
}

.mode-btn.locked-btn {
  background: var(--bg-card-elevated);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: var(--warning);
}

/* Paywall Modal Sheet */
.paywall-sheet {
  max-height: 90vh;
}

.paywall-tag {
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--warning);
  letter-spacing: 0.04em;
}

.paywall-scroll-body {
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 4px;
}

.price-hero-box {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.14), rgba(56, 189, 248, 0.1));
  border: 1.5px solid rgba(245, 158, 11, 0.4);
  border-radius: 14px;
  padding: 14px;
}

.price-main {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 10px;
}

.price-main .currency {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--warning);
}

.price-main .amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.price-main .period {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.paywall-perks {
  list-style: none;
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.student-id-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card-elevated);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 10px 14px;
}

.student-id-card small {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.student-id-card strong {
  font-size: 1.05rem;
  color: var(--primary);
  letter-spacing: 0.04em;
}

.bank-details-card,
.slip-upload-card,
.unlock-code-card {
  background: var(--bg-card-elevated);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 13px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bank-details-card h4,
.slip-upload-card h4,
.unlock-code-card h4 {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--text-primary);
}

.bank-note {
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.bank-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  background: var(--bg-card);
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
}

.bank-grid span {
  color: var(--text-muted);
}

.acc-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.mini-copy-btn {
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid var(--primary);
  background: var(--primary-glow);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
}

.slip-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.slip-form input[type="text"] {
  width: 100%;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
}

.file-drop-label {
  display: block;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1.5px dashed var(--primary);
  background: var(--primary-glow);
  color: var(--primary);
  text-align: center;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.slip-status-banner {
  margin-top: 4px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--warning-bg);
  color: var(--warning);
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.unlock-input-row {
  display: flex;
  gap: 8px;
}

.unlock-input-row input {
  flex: 1;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: monospace;
  font-size: 0.98rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.unlock-feedback {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 10px;
  border-radius: 8px;
}

.unlock-feedback.ok {
  background: var(--success-bg);
  color: var(--success);
}

.unlock-feedback.err {
  background: var(--danger-bg);
  color: var(--danger);
}