/* ============================================================================
   LNAT PLATFORM MASTER STYLESHEET (lnat_style.css)
   Law Admissions Testing Architecture - Modern, Dark Luxury & High Performance
   ============================================================================ */

:root {
  --bg-main: #080c14;
  --bg-surface: #0f172a;
  --bg-card: #131e36;
  --bg-card-hover: #192746;
  --bg-input: #17233f;
  --border-subtle: #1e293b;
  --border-accent: #334155;
  --border-highlight: #3b82f6;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #f59e0b;
  --accent-gold: #fbbf24;
  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --danger: #ef4444;
  --success: #10b981;
  --warning: #f59e0b;

  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-display: 'Syne', sans-serif;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 20px rgba(56, 189, 248, 0.2);
}

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

html, body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #7dd3fc;
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.cat-nav, .lnat-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 28px;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  font-size: 1.6rem;
  filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.4));
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
  color: #fff;
}

.brand-pill {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.nav-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 8px;
  transition: all 0.2s;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   LAYOUT CONTAINERS & HERO
   ========================================================================== */
.cat-container, .lnat-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
}

.hero-section {
  text-align: center;
  padding: 48px 16px 28px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.3);
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: 2.7rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 16px;
  color: #fff;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 760px;
  margin: 0 auto 24px;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #fff;
  border-color: #3b82f6;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
  transform: translateY(-1px);
  color: #fff;
}

.btn-accent {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #fff;
  border-color: #fbbf24;
}

.btn-accent:hover {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  transform: translateY(-1px);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--text-secondary);
}

.btn-outline.active {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 700;
}

.btn-secondary {
  background: #334155;
  color: #fff;
  border-color: #475569;
}

.btn-secondary:hover {
  background: #475569;
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.4);
  color: #f87171;
}

.btn-danger:hover {
  background: #ef4444;
  color: #fff;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.78rem;
  border-radius: 8px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: 12px;
}

/* ==========================================================================
   CARDS & GRIDS
   ========================================================================== */
.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.blueprint-meta-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background: rgba(19, 30, 54, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  margin-bottom: 24px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.blueprint-meta-strip span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.blueprint-meta-strip strong {
  color: #fff;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.cat-card, .lnat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.25s ease;
}

.cat-card:hover, .lnat-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-tag {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.tag-diag {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.tag-lock {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.tag-unlocked {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin: 6px 0 10px;
  line-height: 1.3;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex-grow: 1;
  margin-bottom: 16px;
}

.card-meta-row {
  display: flex;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.card-meta-row span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   EXAM RUNNER INTERFACE (TEST SCREEN)
   ========================================================================== */
.exam-body {
  overflow: hidden;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  background: #0b1120;
  border-bottom: 1px solid var(--border-subtle);
  height: 60px;
  flex-shrink: 0;
}

.exam-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.exam-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
}

.timer-box {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-gold);
}

.timer-box.timer-urgent {
  background: rgba(239, 68, 68, 0.2);
  border-color: #ef4444;
  color: #ef4444;
  animation: pulseUrgent 1s infinite alternate;
}

@keyframes pulseUrgent {
  from { transform: scale(1); }
  to { transform: scale(1.04); }
}

.exam-section-strip {
  display: flex;
  background: #090e1a;
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 16px;
  gap: 6px;
  overflow-x: auto;
  flex-shrink: 0;
}

.section-pill {
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}

.section-pill.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.06);
}

.section-pill.completed {
  color: var(--accent-emerald);
}

/* 2-Column Split Exam Layout */
.exam-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  flex-grow: 1;
  overflow: hidden;
  height: calc(100vh - 100px);
}

.exam-main {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-subtle);
  overflow: hidden;
  background: #090e1a;
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.6);
  flex-shrink: 0;
}

.q-meta-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
}

.question-content {
  flex-grow: 1;
  overflow-y: auto;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* For tests with no split passage (e.g. essay or single pane) */
.question-content.single-pane {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.passage-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 20px 24px;
  line-height: 1.8;
  font-size: 0.98rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  height: auto;
  overflow: visible;
}

.passage-panel h4 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  margin-bottom: 10px;
  color: var(--accent-gold);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 8px;
}

.question-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

.q-prompt-card {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-accent);
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.q-prompt-text {
  font-size: 1.12rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.5;
  letter-spacing: -0.2px;
}

.options-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.option-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-accent);
  transform: translateX(2px);
}

.option-item.selected {
  background: rgba(56, 189, 248, 0.12);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 1px var(--accent-cyan);
}

.option-radio {
  margin: 0;
  width: 17px;
  height: 17px;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

.option-key {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--accent-cyan);
  min-width: 24px;
}

.option-text {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.45;
}

/* Essay Editor Styling */
.essay-editor-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 10px 0;
}

.essay-prompt-box {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 12px;
  padding: 16px 20px;
}

.essay-prompt-selector {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.prompt-choice-card {
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.9rem;
}

.prompt-choice-card:hover {
  border-color: var(--border-accent);
}

.prompt-choice-card.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent-blue);
  font-weight: 600;
}

.essay-textarea {
  width: 100%;
  min-height: 380px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  padding: 20px;
  resize: vertical;
  outline: none;
  transition: border-color 0.2s;
}

.essay-textarea:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.essay-stats-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding: 6px 12px;
  background: var(--bg-surface);
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
}

/* Navigation bottom bar */
.question-nav-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-top: 1px solid var(--border-subtle);
  background: #0b1120;
  flex-shrink: 0;
}

/* Sidebar Question Palette */
.exam-sidebar {
  background: #0f172a;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.candidate-summary {
  padding: 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 12px;
}

.legend-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-badge {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.72rem;
  color: #fff;
}

.legend-badge.answered { background: var(--success); }
.legend-badge.not-answered { background: var(--danger); }
.legend-badge.not-visited { background: #334155; color: #94a3b8; }
.legend-badge.marked { background: var(--accent-indigo); }
.legend-badge.ans-marked { background: #8b5cf6; border: 2px solid var(--success); }

.palette-container {
  flex-grow: 1;
  overflow-y: auto;
  padding: 14px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  align-content: start;
}

.palette-btn {
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1px solid transparent;
  background: #1e293b;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.palette-btn:hover {
  background: #334155;
  color: #fff;
}

.palette-btn.current {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 1px;
}

.palette-btn.answered { background: var(--success); color: #fff; }
.palette-btn.not-answered { background: var(--danger); color: #fff; }
.palette-btn.marked { background: var(--accent-indigo); color: #fff; }
.palette-btn.ans-marked { background: #8b5cf6; color: #fff; position: relative; }

/* ==========================================================================
   MODALS & POPUPS
   ========================================================================== */
.modal-overlay, .modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-overlay.show, .modal-backdrop.show {
  display: flex;
}

.modal-card, .grant-modal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-accent);
  border-radius: 16px;
  padding: 28px;
  max-width: 540px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  animation: modalEnter 0.2s ease-out;
}

@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.modal-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* ==========================================================================
   TABLES (ADMIN & DASHBOARD)
   ========================================================================== */
.cat-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.cat-table th {
  background: #131d33;
  color: var(--text-secondary);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.5px;
}

.cat-table td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

.cat-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--accent-cyan);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MOBILE & TABLET)
   ========================================================================== */
@media (max-width: 900px) {
  .hero-title {
    font-size: 2rem;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .exam-layout {
    grid-template-columns: 1fr;
    height: auto;
    overflow-y: auto;
  }
  .exam-sidebar {
    height: 350px;
    border-top: 1px solid var(--border-subtle);
  }
  .question-content {
    grid-template-columns: 1fr;
    padding: 16px;
  }
  .passage-panel {
    max-height: 280px;
  }
}