/*
Theme Name: ExamTracker Pro
Theme URI: https://examtracker.in
Author: ExamTracker
Author URI: https://examtracker.in
Description: A clean, modern MCQ practice platform theme for JEE, NEET, UPSC and competitive exam preparation. Features real-time quiz engine, subject-wise filtering, performance analytics, and a stunning new-age UI.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: examtracker-pro
Tags: education, quiz, mcq, exam, competitive, jee, neet, dark, modern
*/

/* ============================================
   CSS CUSTOM PROPERTIES — DESIGN TOKENS
   ============================================ */
:root {
  /* Primary Palette — Deep Indigo + Electric Cyan */
  --clr-bg:          #0a0e1a;
  --clr-bg-2:        #0f1526;
  --clr-surface:     #141b2d;
  --clr-surface-2:   #1a2340;
  --clr-border:      rgba(255,255,255,0.07);
  --clr-border-glow: rgba(82,170,255,0.25);

  --clr-primary:     #52aaff;
  --clr-primary-dim: rgba(82,170,255,0.15);
  --clr-accent:      #00e5b0;
  --clr-accent-dim:  rgba(0,229,176,0.12);
  --clr-warn:        #ff7043;
  --clr-warn-dim:    rgba(255,112,67,0.15);
  --clr-gold:        #ffd54f;

  --clr-text:        #e8eaf0;
  --clr-text-2:      #8892b0;
  --clr-text-3:      #4a5578;

  /* Typography */
  --font-display:    'Syne', sans-serif;
  --font-body:       'DM Sans', sans-serif;
  --font-mono:       'JetBrains Mono', monospace;

  /* Sizing */
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  32px;

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg:  0 24px 64px rgba(0,0,0,0.5);
  --glow-primary: 0 0 24px rgba(82,170,255,0.3);
  --glow-accent:  0 0 24px rgba(0,229,176,0.3);

  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--clr-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--clr-accent); }

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

ul { list-style: none; }

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.badge-primary  { background: var(--clr-primary-dim); color: var(--clr-primary); border: 1px solid rgba(82,170,255,0.2); }
.badge-accent   { background: var(--clr-accent-dim);  color: var(--clr-accent);  border: 1px solid rgba(0,229,176,0.2); }
.badge-warn     { background: var(--clr-warn-dim);    color: var(--clr-warn);    border: 1px solid rgba(255,112,67,0.2); }
.badge-gold     { background: rgba(255,213,79,0.12);  color: var(--clr-gold);    border: 1px solid rgba(255,213,79,0.2); }
.badge-easy     { background: rgba(0,229,176,0.12);   color: var(--clr-accent);  border: 1px solid rgba(0,229,176,0.2); }
.badge-medium   { background: rgba(255,213,79,0.12);  color: var(--clr-gold);    border: 1px solid rgba(255,213,79,0.2); }
.badge-hard     { background: var(--clr-warn-dim);    color: var(--clr-warn);    border: 1px solid rgba(255,112,67,0.2); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--clr-primary);
  color: #0a0e1a;
  box-shadow: 0 4px 20px rgba(82,170,255,0.35);
}
.btn-primary:hover {
  background: #7dc4ff;
  color: #0a0e1a;
  box-shadow: 0 6px 28px rgba(82,170,255,0.5);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
}
.btn-ghost:hover {
  background: var(--clr-surface);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}

.btn-accent {
  background: var(--clr-accent);
  color: #0a0e1a;
  box-shadow: 0 4px 20px rgba(0,229,176,0.3);
}
.btn-accent:hover {
  background: #33ebbf;
  color: #0a0e1a;
  transform: translateY(-1px);
}

.btn-sm { padding: 8px 16px; font-size: 0.82rem; }
.btn-lg { padding: 16px 32px; font-size: 1rem; border-radius: var(--radius-lg); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.section-sub {
  color: var(--clr-text-2);
  font-size: 1.05rem;
  max-width: 540px;
  line-height: 1.7;
}

.card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.card:hover {
  border-color: var(--clr-border-glow);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--clr-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 32px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 900;
  color: #0a0e1a;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--clr-text);
}

.logo-text span { color: var(--clr-primary); }

#site-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}

#site-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--clr-text-2);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

#site-nav a:hover,
#site-nav .current-menu-item a {
  color: var(--clr-text);
  background: var(--clr-surface);
}

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

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: var(--transition);
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  #site-nav {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--clr-bg-2);
    border-bottom: 1px solid var(--clr-border);
    padding: 16px;
    display: none;
  }
  #site-nav.open { display: block; }
  #site-nav ul { flex-direction: column; }
  #site-nav a { padding: 12px 16px; }
  .header-actions .btn { display: none; }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 100px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(82,170,255,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(0,229,176,0.07) 0%, transparent 50%);
  pointer-events: none;
}

.hero-grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 6px 16px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: 100px;
  font-size: 0.82rem;
  color: var(--clr-text-2);
}

.hero-eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  color: var(--clr-text-2);
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.hero-stat {
  text-align: center;
}

.hero-stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--clr-text);
}

.hero-stat-num span { color: var(--clr-primary); }

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--clr-text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--clr-border);
}

/* ============================================
   EXAM CATEGORY STRIP
   ============================================ */
.exam-strip {
  padding: 24px 0;
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
  overflow: hidden;
  background: var(--clr-bg-2);
}

.exam-strip-track {
  display: flex;
  gap: 12px;
  animation: scroll-track 30s linear infinite;
  width: max-content;
}

.exam-strip-track:hover { animation-play-state: paused; }

.exam-chip {
  flex-shrink: 0;
  padding: 8px 20px;
  border-radius: 100px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--clr-text-2);
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.exam-chip:hover, .exam-chip.active {
  background: var(--clr-primary-dim);
  border-color: rgba(82,170,255,0.35);
  color: var(--clr-primary);
}

@keyframes scroll-track {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ============================================
   SECTION COMMONS
   ============================================ */
.section { padding: 80px 0; }
.section-header { margin-bottom: 48px; }
.section-header.centered { text-align: center; }
.section-header.centered .section-sub { margin: 12px auto 0; }

/* ============================================
   SUBJECTS GRID
   ============================================ */
.subject-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: block;
}

.subject-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient, linear-gradient(90deg, var(--clr-primary), var(--clr-accent)));
  opacity: 0;
  transition: var(--transition);
}

.subject-card:hover::before { opacity: 1; }

.subject-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.subject-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.subject-card p {
  font-size: 0.83rem;
  color: var(--clr-text-2);
  margin-bottom: 16px;
}

.subject-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
}

.subject-count {
  color: var(--clr-text-3);
}

/* ============================================
   QUESTION CARD (MCQ)
   ============================================ */
.question-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.question-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--clr-border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

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

.question-id {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--clr-text-3);
}

.question-body {
  padding: 24px;
}

.question-text {
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--clr-text);
  margin-bottom: 28px;
}

/* MathJax override for dark theme */
.MathJax, .mjx-chtml, mjx-container {
  color: var(--clr-text) !important;
}

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

@media (max-width: 560px) {
  .options-grid { grid-template-columns: 1fr; }
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface-2);
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
  width: 100%;
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.5;
}

.option-btn:hover:not(:disabled) {
  border-color: var(--clr-primary);
  background: var(--clr-primary-dim);
  transform: translateX(2px);
}

.option-btn.selected {
  border-color: var(--clr-primary);
  background: var(--clr-primary-dim);
}

.option-btn.correct {
  border-color: var(--clr-accent);
  background: var(--clr-accent-dim);
  color: var(--clr-text);
}

.option-btn.incorrect {
  border-color: var(--clr-warn);
  background: var(--clr-warn-dim);
  color: var(--clr-text);
}

.option-btn:disabled {
  cursor: default;
}

.option-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  min-width: 30px;
  border-radius: 8px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-mono);
  transition: var(--transition);
}

.option-btn.selected .option-label {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: #0a0e1a;
}

.option-btn.correct .option-label {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #0a0e1a;
}

.option-btn.incorrect .option-label {
  background: var(--clr-warn);
  border-color: var(--clr-warn);
  color: #fff;
}

.question-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.result-indicator {
  display: none;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
}

.result-indicator.correct-msg { color: var(--clr-accent); display: flex; }
.result-indicator.incorrect-msg { color: var(--clr-warn); display: flex; }

/* ============================================
   SOLUTION PANEL
   ============================================ */
.solution-panel {
  display: none;
  margin-top: 16px;
  padding: 20px;
  border-radius: var(--radius-md);
  background: rgba(82,170,255,0.05);
  border: 1px solid rgba(82,170,255,0.15);
  border-left: 3px solid var(--clr-primary);
}

.solution-panel.show { display: block; }

.solution-panel h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--clr-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.solution-panel .solution-content {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--clr-text-2);
}

.solution-panel .solution-content b { color: var(--clr-text); }
.solution-panel .solution-content ul { padding-left: 20px; margin-top: 8px; }
.solution-panel .solution-content li { margin-bottom: 6px; list-style: disc; }

/* ============================================
   QUIZ MODE PAGE
   ============================================ */
.quiz-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items: start;
}

@media (max-width: 1024px) {
  .quiz-layout { grid-template-columns: 1fr; }
}

.quiz-progress-bar {
  height: 4px;
  background: var(--clr-surface-2);
  border-radius: 2px;
  margin-bottom: 28px;
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  border-radius: 2px;
  transition: width 0.4s ease;
}

.quiz-sidebar {
  position: sticky;
  top: 88px;
}

.quiz-sidebar-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
}

.quiz-sidebar-card h4 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--clr-text-2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.q-palette {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}

.q-palette-btn {
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1.5px solid var(--clr-border);
  background: var(--clr-surface-2);
  color: var(--clr-text-2);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-mono);
}

.q-palette-btn:hover { border-color: var(--clr-primary); color: var(--clr-primary); }
.q-palette-btn.answered { background: var(--clr-accent-dim); border-color: var(--clr-accent); color: var(--clr-accent); }
.q-palette-btn.current { background: var(--clr-primary-dim); border-color: var(--clr-primary); color: var(--clr-primary); }
.q-palette-btn.skipped { background: var(--clr-warn-dim); border-color: var(--clr-warn); color: var(--clr-warn); }

.quiz-timer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: var(--clr-surface-2);
  margin-bottom: 16px;
}

.timer-icon { font-size: 1.2rem; }

.timer-display {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--clr-text);
}

.timer-display.warning { color: var(--clr-warn); animation: blink 1s ease-in-out infinite; }

@keyframes blink { 50% { opacity: 0.5; } }

.quiz-score-mini {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 16px;
}

.score-mini-item {
  text-align: center;
  padding: 10px 6px;
  border-radius: var(--radius-sm);
  background: var(--clr-surface-2);
}

.score-mini-num {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
}

.score-mini-num.correct { color: var(--clr-accent); }
.score-mini-num.incorrect { color: var(--clr-warn); }
.score-mini-num.unattempted { color: var(--clr-text-3); }

.score-mini-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--clr-text-3);
  margin-top: 2px;
}

/* ============================================
   RESULTS PAGE
   ============================================ */
.result-hero {
  text-align: center;
  padding: 60px 24px;
}

.result-ring {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto 32px;
}

.result-ring svg {
  transform: rotate(-90deg);
}

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

.result-ring-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--clr-text);
  line-height: 1;
}

.result-ring-label {
  font-size: 0.72rem;
  color: var(--clr-text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.result-stats-row {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin: 32px 0;
}

.result-stat { text-align: center; }

.result-stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.result-stat-num.g { color: var(--clr-accent); }
.result-stat-num.r { color: var(--clr-warn); }
.result-stat-num.b { color: var(--clr-primary); }

.result-stat-label {
  font-size: 0.78rem;
  color: var(--clr-text-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 4px;
}

/* ============================================
   LEADERBOARD TABLE
   ============================================ */
.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
}

.leaderboard-table th {
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--clr-text-3);
  padding: 12px 16px;
  border-bottom: 1px solid var(--clr-border);
}

.leaderboard-table td {
  padding: 14px 16px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--clr-border);
  vertical-align: middle;
}

.leaderboard-table tr:last-child td { border-bottom: none; }

.leaderboard-table tr:hover td {
  background: var(--clr-surface-2);
}

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  font-weight: 800;
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.rank-1 { background: rgba(255,213,79,0.2); color: var(--clr-gold); }
.rank-2 { background: rgba(176,190,197,0.2); color: #b0bec5; }
.rank-3 { background: rgba(161,108,72,0.2); color: #a16c48; }

/* ============================================
   FEATURE SECTION
   ============================================ */
.feature-item {
  display: flex;
  gap: 20px;
  padding: 28px;
}

.feature-icon-wrap {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.feature-item h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.feature-item p {
  font-size: 0.88rem;
  color: var(--clr-text-2);
  line-height: 1.65;
}

/* ============================================
   FOOTER
   ============================================ */
#site-footer {
  background: var(--clr-bg-2);
  border-top: 1px solid var(--clr-border);
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--clr-text-2);
  margin-top: 12px;
  line-height: 1.7;
  max-width: 260px;
}

.footer-col h5 {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-2);
  margin-bottom: 16px;
}

.footer-col ul li { margin-bottom: 10px; }

.footer-col ul a {
  font-size: 0.88rem;
  color: var(--clr-text-3);
  transition: var(--transition);
}

.footer-col ul a:hover { color: var(--clr-text); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid var(--clr-border);
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--clr-text-3);
}

/* ============================================
   SEARCH BAR
   ============================================ */
.search-wrap {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: 16px 56px 16px 20px;
  border-radius: var(--radius-xl);
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.search-input::placeholder { color: var(--clr-text-3); }

.search-input:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 4px var(--clr-primary-dim);
}

.search-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--clr-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0a0e1a;
  font-size: 1rem;
  transition: var(--transition);
}

.search-btn:hover { background: var(--clr-accent); }

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  font-size: 0.88rem;
  font-weight: 500;
  min-width: 260px;
  animation: toast-in 0.3s ease;
  box-shadow: var(--shadow-md);
}

.toast.success { border-color: rgba(0,229,176,0.3); }
.toast.error   { border-color: rgba(255,112,67,0.3); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============================================
   LOADING SKELETON
   ============================================ */
.skeleton {
  background: linear-gradient(90deg, var(--clr-surface) 25%, var(--clr-surface-2) 50%, var(--clr-surface) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ============================================
   FILTER TABS
   ============================================ */
.filter-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 4px;
  background: var(--clr-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  width: fit-content;
}

.filter-tab {
  padding: 8px 18px;
  border-radius: calc(var(--radius-md) - 2px);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--clr-text-2);
  cursor: pointer;
  border: none;
  background: none;
  transition: var(--transition);
  font-family: var(--font-body);
}

.filter-tab:hover { color: var(--clr-text); }

.filter-tab.active {
  background: var(--clr-primary);
  color: #0a0e1a;
}

/* ============================================
   PERFORMANCE CHART AREA
   ============================================ */
.perf-chart-wrap {
  padding: 24px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
}

.mini-bar-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 80px;
  margin-top: 16px;
}

.bar-col {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: var(--clr-primary-dim);
  border: 1px solid rgba(82,170,255,0.2);
  transition: var(--transition);
  position: relative;
}

.bar-col:hover {
  background: var(--clr-primary);
  cursor: pointer;
}

/* ============================================
   RESPONSIVE OVERRIDES
   ============================================ */
@media (max-width: 480px) {
  .hero { padding: 60px 0 48px; }
  .section { padding: 56px 0; }
  .quiz-sidebar { position: static; }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  #site-header, #site-footer, .quiz-sidebar { display: none; }
  body { background: #fff; color: #000; }
  .question-card { border: 1px solid #ccc; page-break-inside: avoid; }
}