/* ============================================
   IQgenio — Main Stylesheet
   Modern dark theme with neural aesthetic
   ============================================ */

/* === VARIABLES === */
:root {
  --bg-primary: #06060f;
  --bg-secondary: #0d0d1a;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --bg-glass: rgba(255,255,255,0.05);
  --border-glass: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);

  --text-primary: #f0f0f5;
  --text-secondary: rgba(240,240,245,0.65);
  --text-muted: rgba(240,240,245,0.4);

  --accent-blue: #00d4ff;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;

  --gradient-main: linear-gradient(135deg, #00d4ff, #8b5cf6, #ec4899);
  --gradient-card: linear-gradient(135deg, rgba(0,212,255,0.08), rgba(139,92,246,0.08));
  --gradient-bg: radial-gradient(ellipse at 20% 50%, rgba(139,92,246,0.08) 0%, transparent 50%),
                 radial-gradient(ellipse at 80% 20%, rgba(0,212,255,0.06) 0%, transparent 50%),
                 radial-gradient(ellipse at 50% 80%, rgba(236,72,153,0.04) 0%, transparent 50%);

  --shadow-glow: 0 0 30px rgba(0,212,255,0.15);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.3);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--gradient-bg);
  pointer-events: none;
  z-index: 0;
}

/* === NEURAL BACKGROUND === */
#neural-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.4;
  pointer-events: none;
}

/* === SCREENS === */
.screen {
  position: fixed;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.screen.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.screen-content {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
}

.screen-content.narrow { max-width: 540px; }

.screen-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.screen-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1rem;
}

/* === HAMBURGER MENU === */
.hamburger-btn {
  position: fixed;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 200;
  width: 40px;
  height: 40px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  backdrop-filter: blur(12px);
  transition: var(--transition);
}
.hamburger-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: 0.3s;
}
.hamburger-btn:hover { background: var(--bg-card-hover); }
.hamburger-btn.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger-btn.open span:nth-child(2) { opacity: 0; }
.hamburger-btn.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.side-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 300;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.side-menu-overlay.open { opacity: 1; pointer-events: auto; }

.side-menu {
  position: fixed;
  top: 0;
  right: -280px;
  width: 280px;
  height: 100%;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-glass);
  z-index: 400;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  transition: right 0.3s ease;
  overflow-y: auto;
}
.side-menu.open { right: 0; }

.side-menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-glass);
}
.side-menu-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
}
.side-menu-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.8rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}
.side-menu-close:hover { color: var(--text-primary); }

.side-menu-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}
.side-menu-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: var(--transition);
}
.side-menu-links a:hover {
  background: var(--bg-glass);
  color: var(--text-primary);
}

.side-menu-lang {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-glass);
}
.side-menu-lang-label {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === LANGUAGE BAR (inside side menu) === */
.lang-bar {
  display: flex;
  gap: 2px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  padding: 3px;
  flex-wrap: wrap;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
}

.lang-btn:hover { color: var(--text-primary); }
.lang-btn.active {
  background: var(--gradient-main);
  color: white;
}

/* === HERO === */
#screen-hero {
  justify-content: flex-start;
  padding-top: 3rem;
}

.hero-content {
  max-width: 800px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(139,92,246,0.12);
  border: 1px solid rgba(139,92,246,0.25);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-purple);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  animation: fadeInDown 0.6s ease;
}

.hero-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  animation: fadeIn 0.8s ease;
}

.brain-icon { filter: drop-shadow(0 0 12px rgba(0,212,255,0.3)); }
.brain-icon.large { filter: drop-shadow(0 0 20px rgba(0,212,255,0.4)); }

.hero-title {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
}

.hero-title .accent {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  animation: fadeIn 1s ease 0.2s both;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-main);
  color: white;
  box-shadow: 0 4px 20px rgba(0,212,255,0.2);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,212,255,0.3);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(8px);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.btn-ghost {
  background: none;
  color: var(--text-secondary);
  border: 1px solid transparent;
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--border-glass); }

.btn-sm { padding: 0.55rem 1.2rem; font-size: 0.85rem; }
.btn-lg { padding: 1rem 2.5rem; font-size: 1.1rem; }

.btn-glow {
  animation: glowPulse 2s ease-in-out infinite;
}

.btn-tag {
  font-size: 0.65rem;
  padding: 2px 8px;
  background: rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  margin-left: 0.25rem;
  letter-spacing: 0.05em;
}

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

.btn-back {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 10;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  backdrop-filter: blur(8px);
}
.btn-back:hover { background: var(--bg-card-hover); }

/* === HERO ACTIONS === */
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  animation: fadeInUp 0.8s ease 0.4s both;
}

/* === HERO STATS === */
.hero-stats {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  padding: 1.5rem 0;
  animation: fadeInUp 0.8s ease 0.6s both;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === FEATURES GRID === */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  width: 100%;
  max-width: 700px;
  animation: fadeInUp 0.8s ease 0.8s both;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: left;
  transition: var(--transition);
}
.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.feature-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* === TRUST BAR === */
.trust-bar {
  padding: 1rem 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  animation: fadeIn 1s ease 1s both;
}

/* === FORMAT CARDS === */
.format-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1rem;
}

.format-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  transition: var(--transition);
  position: relative;
  cursor: pointer;
}

.format-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.format-card.featured {
  border-color: var(--accent-purple);
  background: var(--gradient-card);
}

.format-badge {
  position: absolute;
  top: -10px;
  font-size: 0.65rem;
  padding: 3px 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.format-badge.popular {
  background: var(--gradient-main);
  color: white;
  border: none;
}

.format-icon { font-size: 2.5rem; }

.format-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.format-meta {
  display: flex;
  gap: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.format-meta small { opacity: 0.6; }

.format-accuracy {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--accent-green);
  font-size: 0.9rem;
}

.format-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* === PRETEST === */
.pretest-icon { font-size: 3rem; text-align: center; margin-bottom: 0.5rem; }

.pretest-form {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.form-group { margin-bottom: 1.25rem; }
.form-group:last-child { margin-bottom: 0; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.age-options, .edu-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.age-btn, .edu-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-main);
}
.age-btn:hover, .edu-btn:hover { border-color: var(--accent-blue); color: var(--text-primary); }
.age-btn.active, .edu-btn.active {
  background: var(--gradient-main);
  color: white;
  border-color: transparent;
}

.pretest-rules {
  margin: 1.5rem 0;
}
.pretest-rules h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.pretest-rules ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.pretest-rules li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-left: 1.5rem;
  position: relative;
}
.pretest-rules li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-green);
  font-weight: 700;
}

/* === TEST SCREEN === */
.test-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 10;
  background: rgba(6,6,15,0.9);
  backdrop-filter: blur(12px);
  padding: 0.5rem 0 0.75rem;
}

.test-header-top {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0 0.5rem;
}

.btn-back-inline {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: var(--radius-full);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  backdrop-filter: blur(8px);
}
.btn-back-inline:hover { background: var(--bg-card-hover); }

.test-progress {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}

.test-progress-bar {
  height: 100%;
  background: var(--gradient-main);
  border-radius: 2px;
  transition: width 0.5s ease;
  width: 0%;
}

.test-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex: 1;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.test-domain { font-weight: 600; }
.test-difficulty { letter-spacing: 2px; }

.test-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
  padding: 1rem 0;
}

.test-question {
  font-size: 1.1rem;
  text-align: center;
  margin-bottom: 2rem;
  line-height: 1.7;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.test-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  width: 100%;
  max-width: 500px;
}

.test-option {
  background: var(--bg-card);
  border: 2px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.test-option:hover {
  border-color: var(--accent-blue);
  background: rgba(0,212,255,0.06);
}
.test-option.selected {
  border-color: var(--accent-blue);
  background: rgba(0,212,255,0.12);
}
.test-option.correct {
  border-color: var(--accent-green);
  background: rgba(16,185,129,0.15);
}
.test-option.wrong {
  border-color: var(--accent-red);
  background: rgba(239,68,68,0.15);
}
.test-option.disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* Sequential Recall (Digit Span) */
.seq-input-grid {
  grid-template-columns: repeat(5, 1fr) !important;
  gap: 0.5rem !important;
  max-width: 400px !important;
}
.seq-digit-btn {
  min-height: 48px !important;
  padding: 0.6rem !important;
  font-size: 1.25rem !important;
  font-weight: 700;
}
.seq-undo-btn {
  min-height: 48px !important;
  padding: 0.6rem !important;
  font-size: 1.25rem !important;
  background: rgba(239,68,68,0.1) !important;
  border-color: rgba(239,68,68,0.3) !important;
}
.seq-undo-btn:hover {
  background: rgba(239,68,68,0.2) !important;
}
.seq-selected {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 50px;
  margin: 0.75rem 0;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 2px solid var(--border-glass);
  border-radius: var(--radius-lg);
}
.seq-selected.correct {
  border-color: var(--accent-green);
  background: rgba(16,185,129,0.1);
}
.seq-selected.wrong {
  border-color: var(--accent-red);
  background: rgba(239,68,68,0.1);
}
.seq-items {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: center;
}
.seq-item {
  background: rgba(0,212,255,0.15);
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 6px;
  padding: 0.25rem 0.6rem;
  font-weight: 700;
  font-size: 1.1rem;
}
.seq-counter {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Memory countdown overlay (game + test) */
.memory-ready-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  gap: 0.5rem;
}
.memory-ready-text {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 0;
}
.memory-ready-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-blue);
  margin: 0 0 0.5rem;
  text-shadow: 0 0 20px rgba(0,212,255,0.3);
}
.memory-ready-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0;
}
.memory-ready-fade {
  animation: readyFadeIn 0.5s ease-out;
}
@keyframes readyFadeIn {
  0% { opacity: 0; transform: scale(0.9); }
  100% { opacity: 1; transform: scale(1); }
}
.memory-ready-num {
  font-size: 5rem;
  font-weight: 800;
  color: var(--accent-blue);
  line-height: 1;
  text-shadow: 0 0 30px rgba(0,212,255,0.4);
}

/* Memory sequence: big digits + countdown */
.memory-countdown-big {
  font-size: 5rem;
  font-weight: 800;
  color: var(--accent-blue);
  text-align: center;
  margin: 1.5rem 0;
  line-height: 1;
  text-shadow: 0 0 30px rgba(0,212,255,0.4);
}
.countdown-pulse {
  animation: countdownPulse 0.6s ease-out;
}
@keyframes countdownPulse {
  0% { transform: scale(1.4); opacity: 0.5; }
  50% { transform: scale(1); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
.seq-big-digit {
  font-size: 5rem !important;
  font-weight: 800 !important;
  min-height: 7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  text-shadow: 0 0 20px rgba(255,255,255,0.15);
}
.seq-item-pop {
  animation: seqItemPop 0.35s ease-out;
}
@keyframes seqItemPop {
  0% { transform: scale(0.4); opacity: 0; }
  60% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}

.test-timer {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}

.timer-bar {
  height: 3px;
  background: var(--accent-green);
  border-radius: 2px;
  transition: width 0.1s linear, background-color 0.3s;
  width: 100%;
}
.timer-bar.warning { background: var(--accent-orange); }
.timer-bar.danger { background: var(--accent-red); }

/* === TEST QUESTION VISUALS === */
.matrix-grid {
  display: grid;
  gap: 4px;
  margin: 0 auto 1.5rem;
  width: fit-content;
}
.matrix-cell {
  width: 70px;
  height: 70px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
.matrix-cell.missing {
  background: rgba(0,212,255,0.08);
  border: 2px dashed var(--accent-blue);
  font-size: 1.5rem;
  color: var(--accent-blue);
}

.sequence-display {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 auto 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.seq-item {
  min-width: 50px;
  height: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
}
.seq-missing {
  border: 2px dashed var(--accent-blue);
  color: var(--accent-blue);
  font-size: 1.5rem;
}
.seq-arrow { color: var(--text-muted); font-size: 0.9rem; }

/* Shape canvas for spatial */
.shape-canvas {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
}
.option-canvas {
  width: 100%;
  height: 80px;
}

/* === ANALYZING === */
#screen-analyzing {
  justify-content: center;
}

.analyzing-animation {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
}

.brain-scan {
  position: relative;
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scan-line {
  position: absolute;
  width: 100%;
  height: 3px;
  background: var(--gradient-main);
  border-radius: 2px;
  animation: scanMove 2s ease-in-out infinite;
  box-shadow: 0 0 20px rgba(0,212,255,0.5);
}

.analyzing-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: 2rem;
}

.analyzing-steps {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 300px;
  margin: 0 auto;
}

.analyzing-steps .step {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-left: 1.5rem;
  position: relative;
  transition: color 0.3s, opacity 0.3s;
}
.analyzing-steps .step::before {
  content: '○';
  position: absolute;
  left: 0;
}
.analyzing-steps .step.active {
  color: var(--accent-blue);
}
.analyzing-steps .step.active::before {
  content: '●';
  color: var(--accent-blue);
}
.analyzing-steps .step.done {
  color: var(--accent-green);
}
.analyzing-steps .step.done::before {
  content: '✓';
  color: var(--accent-green);
}

/* === RESULTS === */
#screen-results {
  padding-top: 2rem;
}

.results-header {
  text-align: center;
  margin-bottom: 1.5rem;
}
.results-header h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.iq-score-container {
  text-align: center;
  margin-bottom: 2rem;
}

.iq-ring {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 0 auto 1rem;
}

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

.iq-number {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.iq-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 60%);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.1em;
}

.iq-percentile {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent-green);
  margin-bottom: 0.25rem;
}

.iq-classification {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Bell Curve */
.bell-curve-container {
  max-width: 600px;
  margin: 0 auto 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 1rem;
}
#bell-curve { width: 100%; height: auto; }

/* Domain Breakdown */
.domains-breakdown {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.domain-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}

.domain-icon { font-size: 1.2rem; }
.domain-name { font-size: 0.85rem; min-width: 120px; }
.domain-progress {
  flex: 1;
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  overflow: hidden;
}
.domain-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1s ease;
}
.domain-score {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  min-width: 35px;
  text-align: right;
}

/* Results Actions */
.results-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.results-disclaimer {
  text-align: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 1rem;
  border-top: 1px solid var(--border-glass);
  max-width: 500px;
  margin: 0 auto;
}

/* === CATEGORIES === */
.categories-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.categories-header h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.training-stats {
  display: flex;
  gap: 1rem;
}

.training-stat {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Daily Challenge */
.daily-challenge-banner {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--gradient-card);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

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

.daily-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.daily-info strong { font-size: 0.9rem; }
.daily-info span { font-size: 0.75rem; color: var(--text-secondary); }

.daily-streak {
  text-align: center;
}
.daily-streak span {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-orange);
  display: block;
}
.daily-streak small { font-size: 0.65rem; color: var(--text-muted); }

/* Categories Grid */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.category-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
}

.category-card.locked {
  opacity: 0.5;
}
.category-card.locked:hover { opacity: 0.7; }

.category-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.category-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.category-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.category-progress-bar {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}

.category-progress-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s;
}

.category-progress-text {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.category-lock {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 1rem;
}

/* === LEVELS MAP === */
.levels-header {
  text-align: center;
  margin-bottom: 1.5rem;
}
.levels-cat-icon { font-size: 2rem; }
.levels-progress {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.levels-map {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
  gap: 0.5rem;
  max-width: 600px;
  margin: 0 auto;
}

.level-node {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  position: relative;
}

.level-node.locked {
  background: rgba(255,255,255,0.03);
  color: var(--text-muted);
  cursor: default;
  border-color: rgba(255,255,255,0.05);
}

.level-node.current {
  background: rgba(0,212,255,0.1);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  animation: glowPulse 2s ease-in-out infinite;
}

.level-node.attempted {
  background: rgba(245,158,11,0.1);
  border-color: rgba(245,158,11,0.4);
  color: var(--accent-orange);
}

.level-node.completed {
  background: rgba(16,185,129,0.1);
  border-color: rgba(16,185,129,0.3);
  color: var(--accent-green);
}

.level-stars {
  position: absolute;
  bottom: -4px;
  font-size: 0.45rem;
  letter-spacing: 1px;
}

/* === GAME SCREEN === */
.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.5rem 0;
  gap: 0.5rem;
}

.btn-back-game {
  position: static;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.game-info {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.game-score {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
}

.game-progress {
  width: 100%;
  height: 3px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.game-progress-bar {
  height: 100%;
  background: var(--gradient-main);
  border-radius: 2px;
  transition: width 0.3s;
}

.game-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
}

.game-instruction {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 1rem;
}

.game-question {
  font-size: 1.1rem;
  text-align: center;
  margin-bottom: 1.5rem;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.game-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  width: 100%;
}

.game-option {
  background: var(--bg-card);
  border: 2px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 1rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 55px;
}
.game-option:hover { border-color: var(--accent-blue); }
.game-option.correct {
  border-color: var(--accent-green);
  background: rgba(16,185,129,0.15);
  animation: correctFlash 0.4s;
}
.game-option.wrong {
  border-color: var(--accent-red);
  background: rgba(239,68,68,0.15);
  animation: wrongShake 0.4s;
}

.game-timer {
  margin-top: 1rem;
  width: 100%;
}

/* Memory grid */
.memory-grid {
  display: grid;
  gap: 6px;
  margin: 0 auto;
  width: fit-content;
}
.memory-cell {
  width: 60px;
  height: 60px;
  background: var(--bg-card);
  border: 2px solid var(--border-glass);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}
.memory-cell.highlighted {
  background: rgba(0,212,255,0.3);
  border-color: var(--accent-blue);
}
.memory-cell.selected {
  background: rgba(139,92,246,0.3);
  border-color: var(--accent-purple);
}
.memory-cell.correct {
  background: rgba(16,185,129,0.3);
  border-color: var(--accent-green);
}
.memory-cell.wrong {
  background: rgba(239,68,68,0.3);
  border-color: var(--accent-red);
}

/* === LEVEL COMPLETE === */
#screen-complete {
  justify-content: center;
}

.complete-stars {
  text-align: center;
  font-size: 3rem;
  margin-bottom: 1rem;
}

.complete-title {
  text-align: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.complete-stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.complete-stat {
  text-align: center;
}
.complete-stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}
.complete-stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.complete-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* === LOCKED POPUP === */
.locked-popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
}
.locked-popup-overlay.show { opacity: 1; }

.locked-popup {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 2rem;
  text-align: center;
  max-width: 340px;
  width: 90%;
  transform: scale(0.9);
  transition: transform 0.3s;
}
.locked-popup-overlay.show .locked-popup { transform: scale(1); }
.locked-popup-icon { font-size: 2.5rem; margin-bottom: 0.75rem; }
.locked-popup-title { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
.locked-popup-text { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 1rem; }
.locked-popup-progress { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 1rem; }

/* === AUDIO PANEL === */
.audio-panel {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 100;
  display: flex;
  gap: 4px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  padding: 4px;
  backdrop-filter: blur(12px);
}

.audio-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.5;
}
.audio-btn:hover { opacity: 0.8; }
.audio-btn.on { opacity: 1; background: rgba(255,255,255,0.12); }
.audio-btn.off { opacity: 0.3; }

/* === ANIMATIONS === */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 15px rgba(0,212,255,0.15); }
  50% { box-shadow: 0 0 30px rgba(0,212,255,0.3); }
}

@keyframes scanMove {
  0%, 100% { top: 10%; }
  50% { top: 80%; }
}

@keyframes correctFlash {
  0% { transform: scale(1); }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

@keyframes wrongShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

@keyframes starPop {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes countUp {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}

/* === PATTERN GRID (game) === */
.pattern-grid {
  display: grid;
  gap: 4px;
  margin: 0 auto 1rem;
  width: fit-content;
}
.pattern-cell {
  width: 70px;
  height: 70px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}
.pattern-cell.question {
  background: rgba(0,212,255,0.08);
  border: 2px dashed var(--accent-blue);
}

/* Option Buttons (shared by game + test) */
.option-btn {
  background: var(--bg-card);
  border: 2px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 0.85rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 55px;
}
.option-btn:hover { border-color: var(--accent-blue); background: rgba(0,212,255,0.06); }
.option-btn.correct {
  border-color: var(--accent-green);
  background: rgba(16,185,129,0.15);
  animation: correctFlash 0.4s;
}
.option-btn.wrong {
  border-color: var(--accent-red);
  background: rgba(239,68,68,0.15);
  animation: wrongShake 0.4s;
}
.option-btn.disabled { pointer-events: none; opacity: 0.6; }
.option-visual { padding: 0.5rem; }

/* Speed prompt */
.speed-prompt {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1.5rem;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Logic display */
.logic-display {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  width: 100%;
  max-width: 500px;
}
.logic-clue {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
}
.logic-clue-num {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Shape display (spatial) */
.shape-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.shape-reference {
  text-align: center;
}
.shape-reference-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.shape-canvas {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
}

/* Game feedback */
.game-feedback {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.game-feedback.show { opacity: 1; }
.feedback-icon {
  font-size: 3rem;
  font-weight: 700;
}
.feedback-icon.correct { color: var(--accent-green); }
.feedback-icon.wrong { color: var(--accent-red); }

/* Confetti */
.confetti-piece {
  position: fixed;
  z-index: 9999;
  pointer-events: none;
}

/* Unlock notification */
.unlock-notification {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%) translateY(-100%);
  z-index: 3000;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--accent-green);
  border-radius: var(--radius-lg);
  padding: 1rem 1.5rem;
  box-shadow: 0 4px 30px rgba(16,185,129,0.3);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.unlock-notification.show {
  transform: translateX(-50%) translateY(0);
}
.unlock-icon { font-size: 1.5rem; }
.unlock-title { font-size: 0.85rem; font-weight: 600; color: var(--accent-green); }
.unlock-category { font-size: 0.8rem; }

/* Category lock info */
.category-lock-info {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  font-style: italic;
}

/* Decoy cell */
.memory-cell.decoy {
  background: rgba(245,158,11,0.3);
  border-color: var(--accent-orange);
}

/* Category star display */
.category-stars {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  margin-top: 0.5rem;
}

/* Category progress */
.category-progress { margin-top: 0.75rem; }

/* Level node stars mini */
.level-stars-mini {
  position: absolute;
  bottom: -2px;
  font-size: 0.4rem;
  letter-spacing: 1px;
  display: flex;
}
.level-stars-mini .star-on { color: var(--accent-orange); }
.level-stars-mini .star-off { color: var(--text-muted); opacity: 0.3; }
.retry-hint { font-size: 0.7rem; color: var(--accent-orange); }
.level-lock { font-size: 0.7rem; }
.level-num { font-size: 0.8rem; }

/* Star animation in complete screen */
.complete-stars .star {
  display: inline-block;
  font-size: 2.5rem;
  animation: starPop 0.4s ease both;
}
.star.earned { color: var(--accent-orange); }
.star.empty { color: var(--text-muted); opacity: 0.3; }

/* Game timer display */
.game-timer-bar {
  height: 3px;
  border-radius: 2px;
  transition: width 0.1s linear;
  width: 100%;
}
.game-timer.critical .game-timer-bar { background: var(--accent-red); }
.game-timer.warning .game-timer-bar { background: var(--accent-orange); }

/* IQ change indicator */
.iq-change {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-green);
}
.iq-change.negative { color: var(--accent-red); }

/* Word pairs for Glr test */
.word-pairs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
  margin: 1rem auto;
  max-width: 500px;
}
.word-pair {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  text-align: center;
  font-size: 0.9rem;
}
.word-pair .pair-word { font-weight: 600; }
.word-pair .pair-arrow { color: var(--text-muted); margin: 0 0.25rem; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .format-cards { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 0.95rem; }
  .hero-stats { gap: 1.25rem; }
  .iq-ring { width: 160px; height: 160px; }
  .iq-number { font-size: 2.5rem; }
}

@media (max-width: 480px) {
  .screen { padding: 1rem; }
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; }
  .categories-grid { grid-template-columns: 1fr; }
  .test-options, .game-options { grid-template-columns: 1fr; }
  .daily-challenge-banner { flex-wrap: wrap; }
  .hamburger-btn { top: 0.5rem; right: 0.5rem; }
  .matrix-cell { width: 55px; height: 55px; }
  .memory-cell { width: 48px; height: 48px; }
  .format-card { padding: 1.25rem 1rem; }
}

@media (max-width: 360px) {
  .hero-title { font-size: 1.75rem; }
  .stat-num { font-size: 1.2rem; }
  .levels-map { grid-template-columns: repeat(auto-fill, minmax(44px, 1fr)); }
  .level-node { width: 42px; height: 42px; font-size: 0.75rem; }
}

/* === ACCESSIBILITY: Skip Link === */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--accent-blue);
  color: #000;
  padding: 0.5rem 1.5rem;
  z-index: 10000;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  top: 0;
}

/* === ACCESSIBILITY: Focus Styles === */
*:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
}
button:focus-visible, .btn:focus-visible, .lang-btn:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.25);
}

/* === PRINT STYLESHEET === */
/* === LANDING PAGES === */
.landing-page {
  min-height: 100vh;
  background: var(--bg-primary);
  background-image: var(--gradient-bg);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.7;
}
.landing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6,6,15,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glass);
}
.landing-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}
.landing-logo .accent { color: var(--accent-blue); }
.landing-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.landing-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}
.landing-nav a:hover { color: var(--accent-blue); }
.landing-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}
.landing-hero {
  text-align: center;
  padding: 3rem 0 2rem;
}
.landing-hero h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.landing-hero .subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto 2rem;
}
.landing-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-main);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-glow);
}
.landing-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0,212,255,0.3);
}
.landing-trust {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.landing-trust span::before {
  content: '✓ ';
  color: var(--accent-green);
}
.landing-section {
  margin: 3rem 0;
}
.landing-section h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-glass);
}
.landing-section h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-blue);
  margin: 1.5rem 0 0.5rem;
}
.landing-section p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.landing-section ul, .landing-section ol {
  color: var(--text-secondary);
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}
.landing-section li {
  margin-bottom: 0.5rem;
}
.landing-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
}
.landing-table th, .landing-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-glass);
}
.landing-table th {
  color: var(--accent-blue);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.landing-table td { color: var(--text-secondary); }
.landing-table tr:hover td { color: var(--text-primary); }
.landing-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.landing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--transition), background var(--transition);
}
.landing-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.landing-card .card-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}
.landing-card h3 {
  margin: 0 0 0.5rem;
  color: var(--text-primary);
  font-size: 1.1rem;
}
.landing-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}
.landing-card a {
  display: inline-block;
  margin-top: 0.75rem;
  color: var(--accent-blue);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}
.landing-card a:hover { text-decoration: underline; }
.landing-faq { margin: 3rem 0; }
.landing-faq details {
  border-bottom: 1px solid var(--border-glass);
  padding: 1rem 0;
}
.landing-faq summary {
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.landing-faq summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-blue);
  transition: transform var(--transition);
}
.landing-faq details[open] summary::after {
  transform: rotate(45deg);
}
.landing-faq .faq-answer {
  color: var(--text-secondary);
  padding: 0.75rem 0 0.5rem;
  line-height: 1.7;
}
.landing-footer {
  display: none;
  border-top: 1px solid var(--border-glass);
  padding: 2.5rem 2rem;
  text-align: center;
}
body.landing-page .landing-footer {
  display: block;
}
.landing-footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.landing-footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}
.landing-footer-links a:hover { color: var(--accent-blue); }
.landing-footer small {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.landing-breadcrumb {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.landing-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}
.landing-breadcrumb a:hover { color: var(--accent-blue); }
.cta-box {
  text-align: center;
  padding: 2.5rem;
  background: var(--gradient-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  margin: 3rem 0;
}
.cta-box h2 { border: none; padding: 0; margin-bottom: 0.75rem; }
.cta-box p { color: var(--text-secondary); margin-bottom: 1.5rem; }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
  counter-reset: step;
}
.step-item {
  text-align: center;
  padding: 1.5rem;
}
.step-item::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--gradient-main);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0 auto 1rem;
  color: #fff;
}
.step-item h3 { color: var(--text-primary); margin: 0 0 0.5rem; font-size: 1rem; }
.step-item p { color: var(--text-secondary); font-size: 0.9rem; margin: 0; }

@media (max-width: 768px) {
  .landing-hero h1 { font-size: 1.75rem; }
  .landing-header { padding: 0.75rem 1rem; }
  .landing-nav { gap: 0.75rem; }
  .landing-nav a { font-size: 0.8rem; }
  .landing-trust { gap: 1rem; font-size: 0.75rem; }
  .landing-cards { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
}

/* === PRINT STYLESHEET === */
@media print {
  body { background: #fff; color: #000; }
  #neural-bg, .audio-panel, .hamburger-btn, .side-menu, .side-menu-overlay, .btn-back, .test-timer,
  .hero-actions, .features-grid, .trust-bar, .hero-stats { display: none !important; }
  .screen { display: block !important; position: static !important; opacity: 1 !important; }
  .screen:not(.active) { display: none !important; }
  .hero-title, h1, h2, h3 { color: #000; }
  .hero-subtitle, p { color: #333; }
  .iq-ring-svg circle { stroke: #333; }
  .iq-number { color: #000; }
}