/* ========================================
   KPSS TARİH TEST MERKEZİ — Design System
   ======================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800;900&family=Inter:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  /* Colors */
  --primary: #0f1c2e;
  --primary-dark: #0a1420;
  --secondary: #142030;
  --surface: #0f3460;
  --surface-light: #1a4a7a;
  --accent: #e2b714;
  --accent-light: #f5cc2a;
  --accent-glow: rgba(226, 183, 20, 0.25);
  --success: #10b981;
  --success-light: #34d399;
  --error: #ef4444;
  --error-light: #f87171;
  --warning: #f59e0b;
  --text-primary: #f1f1f8;
  --text-secondary: #9898b8;
  --text-muted: #52526e;
  --glass-bg: rgba(255,255,255,0.03);
  --glass-border: rgba(255,255,255,0.07);
  --glass-shadow: 0 8px 40px rgba(0,0,0,0.4);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Fonts */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  scroll-padding-top: 70px;
}

body {
  font-family: var(--font-body);
  background: linear-gradient(160deg, #0f1c2e 0%, #111f35 50%, #0d1a2a 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Page-load fade in */
body.page-ready {
  animation: pageEnter 0.5s ease both;
}

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

/* Scroll-reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(0.4,0,0.2,1), transform 0.6s cubic-bezier(0.4,0,0.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Animated Background ---------- */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-animation::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 20% 50%, rgba(15, 52, 96, 0.6) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(226, 183, 20, 0.08) 0%, transparent 40%),
              radial-gradient(ellipse at 50% 80%, rgba(22, 33, 62, 0.8) 0%, transparent 50%);
  animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
  0% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(-2%, 1%) rotate(1deg); }
  66% { transform: translate(1%, -1%) rotate(-0.5deg); }
  100% { transform: translate(-1%, 2%) rotate(0.5deg); }
}

/* Floating particles */
.particle {
  position: fixed;
  border-radius: var(--radius-full);
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 0.15; }
  90% { opacity: 0.15; }
  100% { transform: translateY(-100vh) rotate(720deg); opacity: 0; }
}

/* ---------- Layout ---------- */
.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.main-content {
  flex: 1;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

/* ---------- Header / Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(14, 14, 30, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(226, 183, 20, 0.12);
  padding: 0.7rem 0;
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
  transition: background var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(10, 10, 22, 0.98);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text-primary);
}

.navbar-logo {
  font-size: 2rem;
  filter: drop-shadow(0 0 8px rgba(226,183,20,0.4));
}

.navbar-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.navbar-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.navbar-subtitle {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 500;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.navbar-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  position: relative;
  padding: 4px 0;
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 2px;
  transition: width var(--transition-normal);
}

.navbar-links a:hover,
.navbar-links a.nav-active {
  color: var(--text-primary);
}

.navbar-links a:hover::after,
.navbar-links a.nav-active::after {
  width: 100%;
}

.nav-stat-pill {
  background: rgba(226, 183, 20, 0.1) !important;
  border: 1px solid rgba(226, 183, 20, 0.25) !important;
  border-radius: 999px !important;
  padding: 4px 14px !important;
  font-size: 0.8rem !important;
  font-weight: 700 !important;
  color: var(--accent) !important;
  letter-spacing: 0.5px;
  cursor: default !important;
}

.nav-stat-pill::after {
  display: none !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
  transition: all var(--transition-fast);
  align-items: center;
}

.hamburger:hover {
  background: rgba(226,183,20,0.1);
  border-color: rgba(226,183,20,0.3);
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile overlay */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 150;
  backdrop-filter: blur(4px);
}

/* ---------- Hero Section ---------- */
.hero {
  text-align: center;
  padding: var(--space-3xl) 0 var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(226,183,20,0.08) 0%, transparent 70%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 39px,
      rgba(226,183,20,0.03) 39px,
      rgba(226,183,20,0.03) 40px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 39px,
      rgba(226,183,20,0.03) 39px,
      rgba(226,183,20,0.03) 40px
    );
  pointer-events: none;
  z-index: 0;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: var(--space-lg);
  backdrop-filter: blur(10px);
  animation: fadeInDown 0.8s ease;
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: var(--radius-full);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.5; }
}

.hero h1 {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.1;
  margin-bottom: var(--space-md);
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 50%, var(--accent) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s linear infinite;
}

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

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  animation: fadeInUp 0.8s ease 0.4s both;
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  display: inline-flex;
  justify-content: center;
  gap: 0;
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s ease 0.6s both;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-xl);
  padding: var(--space-sm);
  backdrop-filter: blur(20px);
}

.stat-item {
  text-align: center;
  padding: var(--space-sm) var(--space-xl);
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0; top: 20%; height: 60%;
  width: 1px;
  background: rgba(255,255,255,0.08);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-top: 2px;
  font-weight: 500;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(0,0,0,0.35);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  border-color: rgba(226, 183, 20, 0.22);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(226,183,20,0.12);
  transform: translateY(-4px);
}

/* ---------- Category Cards Grid ---------- */
.categories-section {
  padding: var(--space-xl) 0 var(--space-3xl);
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.7rem;
  margin-bottom: var(--space-xl);
  text-align: center;
  letter-spacing: -0.5px;
}

.section-title span {
  color: var(--accent);
  position: relative;
}

.section-title span::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 2px;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
}

/* Category Card */
.category-card {
  padding: var(--space-xl) var(--space-xl) var(--space-lg);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 16px rgba(0,0,0,0.3);
  transition: transform 0.35s cubic-bezier(0.34,1.2,0.64,1),
              box-shadow 0.35s ease,
              border-color 0.35s ease;
  will-change: transform;
}

/* Top accent bar */
.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--card-accent, linear-gradient(90deg, var(--accent), var(--accent-light)));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0.9;
}

/* Shine sweep on hover */
.category-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.04) 50%, transparent 60%);
  background-size: 200% 100%;
  background-position: -100% 0;
  transition: background-position 0.6s ease;
  pointer-events: none;
}

.category-card:hover::after {
  background-position: 200% 0;
}

.category-card:hover {
  transform: translateY(-7px) scale(1.01);
  box-shadow: 0 20px 50px rgba(0,0,0,0.45), 0 0 0 1px var(--card-border, rgba(226,183,20,0.2));
  border-color: var(--card-border, rgba(226,183,20,0.2));
}

.category-icon {
  font-size: 2.4rem;
  margin-bottom: 2px;
  display: block;
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1);
  will-change: transform;
}

.category-card:hover .category-icon {
  transform: scale(1.15) rotate(-4deg);
}

.category-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  line-height: 1.3;
}

.category-info {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: auto;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.category-info .count {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.category-info .count .icon {
  font-size: 0.85rem;
}

/* Category progress bar */
.category-progress {
  width: 100%;
  height: 2px;
  background: rgba(255,255,255,0.05);
  border-radius: 2px;
  overflow: hidden;
}

.category-progress-fill {
  height: 100%;
  background: var(--card-accent, linear-gradient(90deg, var(--accent), var(--accent-light)));
  border-radius: 2px;
  transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
}

/* ---------- Ad Container ---------- */
.ad-container {
  display: none !important;
}

.ad-container.leaderboard {
  max-width: 728px;
  min-height: 90px;
}

.ad-container.medium-rectangle {
  width: 300px;
  min-height: 250px;
}

.ad-container.large-rectangle {
  max-width: 336px;
  min-height: 280px;
}

.ad-container.mobile-banner {
  max-width: 320px;
  min-height: 100px;
}

.ad-container.skyscraper {
  width: 300px;
  min-height: 600px;
}

.ad-container.in-feed {
  max-width: 100%;
  min-height: 120px;
}

.ad-label {
  position: absolute;
  top: 4px;
  left: 8px;
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.5;
}

/* Reklam kodu eklenmemişken kutuları gizle */
.ad-container.ad-placeholder-hidden {
  display: none !important;
}

/* ---------- Test Page ---------- */
.test-wrapper {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  min-width: 0;
}

/* Progress Bar */
.progress-container {
  margin-bottom: var(--space-xl);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

.progress-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 999px;
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: progressShine 2s linear infinite;
}

@keyframes progressShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Timer */
.timer {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}

.timer.warning {
  color: var(--error);
  animation: timerPulse 1s ease-in-out infinite;
}

@keyframes timerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Question Card */
.question-card {
  padding: var(--space-2xl);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.5s ease;
}

.question-number {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
}

.question-text {
  font-size: 1.15rem;
  line-height: 1.7;
  font-weight: 500;
  margin-bottom: var(--space-xl);
  color: var(--text-primary);
}

/* Options */
.options-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0.9rem var(--space-lg);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  text-align: left;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-primary);
  line-height: 1.55;
  position: relative;
  overflow: hidden;
  width: 100%;
  will-change: transform;
}

.option-btn:hover:not(:disabled):not(.correct):not(.wrong) {
  background: rgba(226,183,20,0.05);
  border-color: rgba(226,183,20,0.25);
  color: var(--text-primary);
  transform: translateX(5px);
  box-shadow: -3px 0 0 var(--accent);
}

.option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(226,183,20,0.12);
  color: var(--accent);
  font-weight: 800;
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  border: 1px solid rgba(226,183,20,0.25);
}

.option-btn:hover:not(.correct):not(.wrong) .option-letter {
  background: rgba(226,183,20,0.22);
  color: var(--accent-light);
  border-color: rgba(226,183,20,0.5);
}

.option-text {
  position: relative;
  z-index: 1;
  flex: 1;
  min-width: 0;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* Option States */
.option-btn.selected {
  border-color: rgba(226,183,20,0.5);
  background: rgba(226,183,20,0.07);
  color: var(--text-primary);
  box-shadow: -3px 0 0 var(--accent);
}
.option-btn.selected .option-letter {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
}

.option-btn.correct {
  border-color: rgba(16,185,129,0.5);
  background: rgba(16,185,129,0.08);
  color: var(--text-primary);
  pointer-events: none;
  box-shadow: -3px 0 0 var(--success);
}
.option-btn.correct .option-letter {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}

.option-btn.wrong {
  border-color: rgba(239,68,68,0.5);
  background: rgba(239,68,68,0.08);
  color: var(--text-primary);
  pointer-events: none;
  box-shadow: -3px 0 0 var(--error);
}
.option-btn.wrong .option-letter {
  background: var(--error);
  color: #fff;
  border-color: var(--error);
}

.option-btn.disabled {
  pointer-events: none;
  opacity: 0.55;
}

/* Explanation Box */
.explanation-box {
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  background: rgba(226, 183, 20, 0.05);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  animation: fadeInUp 0.4s ease;
  display: none;
}

.explanation-box.show {
  display: block;
}

.explanation-box h4 {
  color: var(--accent);
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
}

.explanation-box p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Navigation Buttons */
.nav-buttons {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.7rem var(--space-xl);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

/* Ripple */
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.12), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.btn:hover::after { opacity: 1; }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  color: #0d0d1a;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(226,183,20,0.25);
}
.btn-primary:hover {
  box-shadow: 0 6px 28px rgba(226,183,20,0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.1);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-1px);
}

.btn-success {
  background: linear-gradient(135deg, var(--success), var(--success-light));
  color: #fff;
  box-shadow: 0 4px 16px rgba(16,185,129,0.25);
}
.btn-success:hover { box-shadow: 0 6px 24px rgba(16,185,129,0.4); transform: translateY(-2px); }

.btn-danger {
  background: linear-gradient(135deg, var(--error), var(--error-light));
  color: #fff;
  box-shadow: 0 4px 16px rgba(239,68,68,0.25);
}

.btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-lg {
  padding: 0.9rem var(--space-2xl);
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

/* ---------- Interstitial Ad Page ---------- */
.interstitial-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 20, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-xl);
  animation: fadeIn 0.3s ease;
}

.interstitial-overlay.active {
  display: flex;
}

.interstitial-content {
  text-align: center;
  max-width: 500px;
}

.interstitial-timer {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-top: var(--space-md);
}

.interstitial-close {
  margin-top: var(--space-md);
}

/* ---------- Result Page ---------- */
.result-wrapper {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

/* Score Circle */
.score-section {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.score-circle-container {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 0 auto var(--space-xl);
}

.score-circle {
  width: 200px;
  height: 200px;
  transform: rotate(-90deg);
}

.score-circle-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.05);
  stroke-width: 10;
}

.score-circle-fill {
  fill: none;
  stroke-width: 10;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.score-circle-fill.success {
  stroke: var(--success);
}

.score-circle-fill.warning {
  stroke: var(--warning);
}

.score-circle-fill.danger {
  stroke: var(--error);
}

.score-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.score-percent {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 3rem;
  line-height: 1;
}

.score-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* Score Stats */
.score-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.score-stat {
  text-align: center;
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-md);
  min-width: 120px;
}

.score-stat.correct {
  background: rgba(0, 184, 148, 0.1);
  border: 1px solid rgba(0, 184, 148, 0.2);
}

.score-stat.wrong {
  background: rgba(214, 48, 49, 0.1);
  border: 1px solid rgba(214, 48, 49, 0.2);
}

.score-stat.empty {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.score-stat-number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2rem;
  display: block;
}

.score-stat.correct .score-stat-number {
  color: var(--success);
}

.score-stat.wrong .score-stat-number {
  color: var(--error);
}

.score-stat.empty .score-stat-number {
  color: var(--text-muted);
}

.score-stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Result Title */
.result-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.8rem;
  margin-bottom: var(--space-sm);
}

.result-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Review Section */
.review-section {
  margin-top: var(--space-2xl);
}

.review-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: var(--space-lg);
}

.review-item {
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

.review-item.is-correct {
  border-left: 3px solid var(--success);
}

.review-item.is-wrong {
  border-left: 3px solid var(--error);
}

.review-item.is-empty {
  border-left: 3px solid var(--text-muted);
}

.review-question {
  font-weight: 500;
  margin-bottom: var(--space-sm);
  font-size: 0.95rem;
}

.review-answer {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.review-answer .correct-text {
  color: var(--success);
  font-weight: 600;
}

.review-answer .wrong-text {
  color: var(--error);
  font-weight: 600;
}

/* Action buttons */
.result-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  flex-wrap: wrap;
}

/* Share buttons */
.share-section {
  text-align: center;
  margin-top: var(--space-xl);
}

.share-title {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.share-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.1rem;
  text-decoration: none;
}

.share-btn:hover {
  background: rgba(226, 183, 20, 0.15);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-2xl) 0 var(--space-xl);
  border-top: 1px solid rgba(255,255,255,0.06);
  margin-top: var(--space-3xl);
  background: rgba(8,8,20,0.5);
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.footer-brand-icon {
  font-size: 1.5rem;
  opacity: 0.7;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-divider {
  width: 100%;
  max-width: 300px;
  height: 1px;
  background: rgba(255,255,255,0.05);
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-align: center;
}

.footer-text a {
  color: var(--accent);
  text-decoration: none;
}

/* ---------- Adblock Warning ---------- */
.adblock-warning {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(253, 203, 110, 0.15);
  border: 1px solid rgba(253, 203, 110, 0.3);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-xl);
  color: var(--warning);
  font-size: 0.9rem;
  z-index: 999;
  display: none;
  backdrop-filter: blur(10px);
  text-align: center;
  max-width: 90%;
  animation: fadeInUp 0.5s ease;
}

.adblock-warning.show {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ---------- Question Number Bubbles ---------- */
.question-bubbles {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-xs);
  justify-content: flex-start;
  overflow-x: auto;
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.question-bubbles::-webkit-scrollbar {
  height: 6px;
}

.question-bubbles::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 99px;
}

.q-bubble {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

.q-bubble.active {
  background: var(--accent);
  color: var(--primary);
  border-color: var(--accent);
}

.q-bubble.answered {
  background: rgba(226, 183, 20, 0.15);
  border-color: rgba(226, 183, 20, 0.3);
  color: var(--accent);
}

.q-bubble:hover {
  border-color: var(--accent);
  transform: scale(1.1);
}

/* ---------- Sidebar Layout ---------- */
.content-with-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-xl);
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 80px;
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

.animate-fadeIn { animation: fadeIn 0.5s ease; }
.animate-fadeInUp { animation: fadeInUp 0.5s ease; }
.animate-scaleIn { animation: scaleIn 0.5s ease; }

/* Stagger children */
.stagger-children > * {
  animation: fadeInUp 0.5s ease both;
}
.stagger-children > *:nth-child(1) { animation-delay: 0.05s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.15s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.25s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(7) { animation-delay: 0.35s; }
.stagger-children > *:nth-child(8) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(9) { animation-delay: 0.45s; }
.stagger-children > *:nth-child(10) { animation-delay: 0.5s; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--primary);
}

::-webkit-scrollbar-thumb {
  background: var(--surface);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--surface-light);
}

/* ---------- Selection ---------- */
::selection {
  background: rgba(226, 183, 20, 0.3);
  color: var(--text-primary);
}

/* ---------- Toast Notification ---------- */
.toast {
  position: fixed;
  top: var(--space-xl);
  right: var(--space-xl);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 2000;
  animation: fadeInDown 0.4s ease, fadeIn 0.4s ease;
  max-width: 400px;
}

.toast.success {
  background: rgba(0, 184, 148, 0.15);
  border: 1px solid rgba(0, 184, 148, 0.3);
  color: var(--success);
}

.toast.error {
  background: rgba(214, 48, 49, 0.15);
  border: 1px solid rgba(214, 48, 49, 0.3);
  color: var(--error);
}

.toast.info {
  background: rgba(226, 183, 20, 0.15);
  border: 1px solid rgba(226, 183, 20, 0.3);
  color: var(--accent);
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 1024px) {
  .content-with-sidebar {
    display: block;
  }

  .sidebar {
    display: none;
  }

  .ad-container.skyscraper {
    display: none;
  }
}

/* Mobile */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .test-wrapper {
    padding: var(--space-lg) 0;
  }

  .stats-bar {
    gap: var(--space-lg);
  }

  .stat-number {
    font-size: 1.5rem;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .question-card {
    padding: var(--space-lg);
  }

  .score-stats {
    flex-direction: column;
    align-items: center;
  }

  .score-stat {
    width: 100%;
    max-width: 250px;
  }

  .result-actions {
    flex-direction: column;
    align-items: center;
  }

  .nav-buttons {
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
    gap: var(--space-md);
  }

  .nav-buttons .btn {
    flex: 1;
    justify-content: center;
    padding: var(--space-md) var(--space-sm);
    font-size: 0.9rem;
  }

  .hamburger {
    display: flex;
  }

  .navbar-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 72%;
    max-width: 280px;
    height: 100dvh;
    background: rgba(10, 12, 28, 0.98);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-left: 1px solid rgba(226,183,20,0.15);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 80px var(--space-xl) var(--space-xl);
    z-index: 160;
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -20px 0 60px rgba(0,0,0,0.5);
  }

  .navbar-links.mobile-open {
    right: 0;
  }

  .mobile-menu-overlay.active {
    display: block;
  }

  .navbar-links li {
    width: 100%;
  }

  .navbar-links a {
    font-size: 1.05rem;
    font-weight: 600;
    padding: var(--space-md) 0;
    display: block;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    color: var(--text-secondary);
  }

  .navbar-links a:hover {
    color: var(--accent);
  }

  .navbar-links a::after {
    display: none;
  }

  .nav-stat-pill {
    margin-top: var(--space-md) !important;
    border: none !important;
    background: none !important;
    padding: 0 !important;
    font-size: 0.9rem !important;
    color: var(--text-muted) !important;
    font-weight: 500 !important;
    border-bottom: none !important;
  }

  .q-bubble {
    width: 40px;
    height: 40px;
    font-size: 0.9rem;
  }

  .option-btn {
    padding: var(--space-md);
    font-size: 0.95rem;
  }

  .ad-container.leaderboard {
    max-width: 320px;
    min-height: 50px;
  }
}

/* Small mobile */
@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .question-text {
    font-size: 1rem;
  }

  .option-btn {
    padding: var(--space-sm) var(--space-md);
  }

  .score-circle-container {
    width: 160px;
    height: 160px;
  }

  .score-circle {
    width: 160px;
    height: 160px;
  }

  .score-percent {
    font-size: 2.5rem;
  }

  .options-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Print ---------- */
@media print {
  .ad-container,
  .navbar,
  .footer,
  .bg-animation,
  .particle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }
}

/* ---------- Shuffle Toggle Switch ---------- */
.shuffle-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s ease 0.5s both;
}

.shuffle-container {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
}

.shuffle-container:hover {
  border-color: rgba(226, 183, 20, 0.4);
  box-shadow: 0 0 15px rgba(226, 183, 20, 0.1);
}

.shuffle-label {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.shuffle-container:hover .shuffle-label {
  color: var(--text-primary);
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.1);
  transition: .4s;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.slider::before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-muted);
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: rgba(226, 183, 20, 0.2);
  border-color: var(--accent);
}

input:checked + .slider::before {
  transform: translateX(20px);
  background-color: var(--accent);
}

/* ---------- Modal Selection Panel ---------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 5, 15, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  padding: var(--space-md);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background: rgba(13, 18, 40, 0.98);
  border: 1px solid rgba(226,183,20,0.2);
  box-shadow: 0 25px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04) inset;
  border-radius: var(--radius-xl);
  overflow: hidden;
  transform: scale(0.92) translateY(16px);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: rgba(255,255,255,0.02);
  flex-shrink: 0;
}

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.modal-close-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: rgba(214,48,49,0.15);
  border-color: rgba(214,48,49,0.3);
  color: var(--error);
}

.modal-body {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  overflow-y: auto;
  flex: 1;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
}

.config-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.config-group label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.config-group label::before {
  content: '';
  display: block;
  width: 3px;
  height: 12px;
  background: var(--accent);
  border-radius: 2px;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.config-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  line-height: 1.4;
}

.config-card:hover {
  border-color: rgba(226, 183, 20, 0.35);
  background: rgba(226, 183, 20, 0.05);
  color: var(--text-primary);
}

.config-card.active {
  background: rgba(226, 183, 20, 0.12);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 20px rgba(226, 183, 20, 0.12), 0 0 0 1px rgba(226,183,20,0.1) inset;
  font-weight: 700;
}

/* Range Inputs */
.range-inputs {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-xs);
}

.range-inputs input {
  flex: 1;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  text-align: center;
}

.range-inputs input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.range-helper {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.modal-footer {
  padding: var(--space-lg);
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: flex-end;
}

.modal-footer .btn {
  width: 100%;
}

/* ---------- Ad Gate (Index Page) ---------- */
.ad-gate-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,5,15,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.ad-gate-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.ad-gate-content {
  width: 100%;
  max-width: 440px;
  background: rgba(13,18,40,0.98);
  border: 1px solid rgba(226,183,20,0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  box-shadow: 0 30px 80px rgba(0,0,0,0.7);
  transform: scale(0.9);
  transition: transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
}

.ad-gate-overlay.active .ad-gate-content {
  transform: scale(1);
}

.ad-gate-icon {
  font-size: 3rem;
  line-height: 1;
  filter: drop-shadow(0 0 16px rgba(226,183,20,0.4));
}

.ad-gate-title {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.3rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.ad-gate-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 340px;
}

.ad-gate-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: 100%;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  text-align: left;
}

.ad-gate-step {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.ad-gate-step.done {
  color: var(--success);
}

.ad-step-num {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(226,183,20,0.1);
  border: 1px solid rgba(226,183,20,0.3);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.ad-gate-step.done .ad-step-num {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.ad-gate-sponsor-btn {
  width: 100%;
  font-size: 1rem;
}

.ad-gate-sponsor-btn.visited {
  opacity: 0.6;
  pointer-events: none;
}

#ad-gate-start-btn {
  width: 100%;
}

#ad-gate-start-btn:not(:disabled) {
  animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 4px 16px rgba(16,185,129,0.3); }
  50%       { box-shadow: 0 8px 32px rgba(16,185,129,0.55); }
}

.ad-gate-status {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: -var(--space-xs);
}

/* ---------- Video Ad Overlay ---------- */
.video-ad-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 10, 20, 0.96);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  padding: var(--space-md);
}

.video-ad-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.video-ad-content {
  width: 100%;
  max-width: 550px;
  background: rgba(22, 33, 62, 0.98);
  border: 1px solid var(--accent);
  box-shadow: 0 0 35px rgba(226, 183, 20, 0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
}

.video-ad-content h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.video-ad-sub {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.video-wrapper {
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--space-lg);
  position: relative;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.link-ad-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  margin-bottom: var(--space-lg);
}

.link-ad-container p {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.btn-visit-sponsor {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--primary) !important;
  border: none;
  font-size: 1.1rem;
  font-weight: 800;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(226, 183, 20, 0.3);
  transition: all var(--transition-fast);
  animation: pulseSponsorButton 1.5s infinite;
}

@keyframes pulseSponsorButton {
  0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(226, 183, 20, 0.4); }
  70% { transform: scale(1.03); box-shadow: 0 0 0 10px rgba(226, 183, 20, 0); }
  100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(226, 183, 20, 0); }
}

.video-ad-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

#video-ad-countdown {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

#btn-close-video-ad {
  width: 100%;
  padding: var(--space-md);
  font-size: 1.1rem;
  font-weight: 700;
}

#btn-close-video-ad:disabled {
  background: var(--text-muted) !important;
  border-color: var(--text-muted) !important;
  color: rgba(255, 255, 255, 0.4) !important;
  cursor: not-allowed;
  opacity: 0.6;
  box-shadow: none !important;
}

/* ---------- PWA Install Button ---------- */
.pwa-install-btn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 998;
  background: linear-gradient(135deg, #fdcb6e, #e17055);
  color: #1e272e;
  border: none;
  border-radius: 50px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 25px rgba(225, 112, 85, 0.4);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  animation: fadeInUp 0.8s ease, pulse-glowing 2s infinite;
}

.pwa-install-btn:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 30px rgba(225, 112, 85, 0.6);
  background: linear-gradient(135deg, #ffeaa7, #ff7675);
}

.pwa-install-btn:active {
  transform: translateY(-1px) scale(0.98);
}

/* ---------- Performance Charts ---------- */
.perf-charts {
  margin: var(--space-xl) 0;
}

.chart-section-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.chart-card {
  padding: var(--space-md) var(--space-md) var(--space-sm);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.chart-card canvas {
  width: 100% !important;
  display: block;
}

@keyframes pulse-glowing {
  0% {
    box-shadow: 0 0 0 0 rgba(225, 112, 85, 0.7), 0 8px 25px rgba(225, 112, 85, 0.4);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(225, 112, 85, 0), 0 8px 25px rgba(225, 112, 85, 0.4);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(225, 112, 85, 0), 0 8px 25px rgba(225, 112, 85, 0.4);
  }
}