:root {
  --bg-base:       #0d1117;
  --bg-surface:    #161b22;
  --bg-card:       #1c2333;
  --bg-card-hover: #1f2a3c;
  --bg-input:      #0d1117;

  --border:        #30363d;
  --border-focus:  #58a6ff;

  --text-primary:  #e6edf3;
  --text-secondary:#8b949e;
  --text-muted:    #484f58;

  --accent-blue:   #58a6ff;
  --accent-purple: #6366f1;
  --accent-green:  #10b981;
  --accent-amber:  #f59e0b;
  --accent-red:    #ef4444;

  --neu-shadow-out: 4px 4px 10px rgba(0,0,0,.4), -2px -2px 8px rgba(255,255,255,.03);
  --neu-shadow-in:  inset 3px 3px 8px rgba(0,0,0,.5), inset -2px -2px 6px rgba(255,255,255,.03);

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --radius-full: 9999px;

  --font: 'Inter', system-ui, sans-serif;
  --transition: 200ms ease;
  --transition-slow: 400ms ease;
}

[data-theme="light"] {
  --bg-base:       #f6f8fa;
  --bg-surface:    #ffffff;
  --bg-card:       #ffffff;
  --bg-card-hover: #eef2ff;
  --bg-input:      #f6f8fa;
  --border:        #d0d7de;
  --border-focus:  #0969da;
  --text-primary:  #1f2328;
  --text-secondary:#57606a;
  --text-muted:    #8c959f;
  --accent-blue:   #0969da;
  --accent-purple: #6e40c9;
  --accent-green:  #1a7f37;
  --accent-amber:  #9a6700;
  --accent-red:    #d1242f;
  --neu-shadow-out: 4px 4px 10px rgba(0,0,0,.07), -2px -2px 8px rgba(255,255,255,.9);
  --neu-shadow-in:  inset 3px 3px 8px rgba(0,0,0,.06), inset -2px -2px 6px rgba(255,255,255,.9);
}
[data-theme="light"] .header { background: rgba(246,248,250,.92); }
[data-theme="light"] .modal-overlay { background: rgba(0,0,0,.35); }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; border: none; background: none; }
a { text-decoration: none; color: inherit; }
input { font-family: inherit; }
img, svg { display: block; }

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}
.gradient-text {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,17,23,.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.logo-icon svg { width: 20px; height: 20px; }
.logo-icon.small { width: 30px; height: 30px; }
.logo-icon.small svg { width: 16px; height: 16px; }
.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
}
.footer-logo-img {
  height: 30px;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-primary { font-size: .9rem; font-weight: 700; color: var(--text-primary); }
.logo-secondary { font-size: .7rem; font-weight: 400; color: var(--text-secondary); }
.nav { display: flex; gap: 4px; }
.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.nav-btn svg { width: 16px; height: 16px; }
.nav-btn:hover { color: var(--text-primary); background: var(--bg-card); }
.nav-btn.active {
  background: linear-gradient(135deg, rgba(88,166,255,.15), rgba(99,102,241,.15));
  color: var(--accent-blue);
  border: 1px solid rgba(88,166,255,.25);
}
.header-theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition);
  flex-shrink: 0;
}
.header-theme-btn svg { width: 16px; height: 16px; }
.header-theme-btn:hover { color: var(--accent-blue); border-color: var(--accent-blue); background: rgba(88,166,255,.08); }

.menu-toggle {
  display: none;
  padding: 8px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}
.menu-toggle svg { width: 20px; height: 20px; }

.main { flex: 1; }
.view { display: none; }
.view.active { display: block; }

.hero {
  padding: 80px 0 60px;
  overflow: hidden;
  position: relative;
}
.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(88,166,255,.3);
  background: rgba(88,166,255,.08);
  color: var(--accent-blue);
  font-size: .8rem;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-badge svg { width: 14px; height: 14px; }
.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 440px;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  flex-shrink: 0;
}
.hero-logo-img {
  width: 100%;
  max-width: 320px;
  height: auto;
  object-fit: contain;
  animation: logo-float 4s ease-in-out infinite;
}
@keyframes logo-float {
  0%, 100% {
    transform: translateY(0);
    filter: drop-shadow(0 0 24px rgba(88,166,255,.3)) drop-shadow(0 8px 20px rgba(99,102,241,.2));
  }
  50% {
    transform: translateY(-12px);
    filter: drop-shadow(0 0 48px rgba(88,166,255,.6)) drop-shadow(0 16px 32px rgba(99,102,241,.35));
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-full);
  font-size: .9rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff;
  box-shadow: 0 4px 20px rgba(88,166,255,.25);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(88,166,255,.4);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--border-focus); color: var(--text-primary); }
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.btn-back svg { width: 16px; height: 16px; }
.btn-back:hover { color: var(--text-primary); border-color: var(--border-focus); }
.btn-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.btn-icon svg { width: 16px; height: 16px; }
.btn-icon:hover { color: var(--accent-red); border-color: var(--accent-red); }
.btn-play {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  font-size: .85rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  color: #fff;
  transition: all var(--transition);
}
.btn-play svg { width: 14px; height: 14px; }
.btn-play:hover { opacity: .9; transform: scale(1.02); }

#tip-section { margin-bottom: 48px; }
.tip-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(88,166,255,.06), rgba(99,102,241,.06));
  border: 1px solid rgba(88,166,255,.2);
  box-shadow: var(--neu-shadow-out);
}
.tip-icon {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(88,166,255,.2), rgba(99,102,241,.2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
}
.tip-icon svg { width: 22px; height: 22px; }
.tip-content { flex: 1; }
.tip-title { font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--accent-blue); margin-bottom: 4px; }
.tip-text { font-size: .9rem; color: var(--text-secondary); line-height: 1.5; }
.tip-text strong { color: var(--text-primary); }
.tip-streak { text-align: center; flex-shrink: 0; }
.streak-number { display: block; font-size: 2rem; font-weight: 800; background: linear-gradient(135deg, var(--accent-amber), var(--accent-red)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.streak-label { font-size: .72rem; color: var(--text-secondary); }

.section-header { text-align: center; margin-bottom: 40px; }
.section-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 8px; }
.section-subtitle { color: var(--text-secondary); font-size: .95rem; }

#games { padding-bottom: 80px; }
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.game-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: all var(--transition-slow);
  box-shadow: var(--neu-shadow-out);
}
.game-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(88,166,255,.25);
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(0,0,0,.3);
}
.game-card-header { display: flex; align-items: center; justify-content: space-between; }
.game-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--color) 30%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color);
}
.game-icon svg { width: 22px; height: 22px; }
.game-difficulty { display: flex; gap: 4px; }
.diff-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
}
.diff-dot.active { background: var(--accent-amber); }
.game-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.game-desc { font-size: .875rem; color: var(--text-secondary); line-height: 1.6; }
.game-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.tag {
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(88,166,255,.08);
  border: 1px solid rgba(88,166,255,.15);
  color: var(--text-secondary);
  font-size: .72rem;
  font-weight: 500;
}
.game-card-footer { display: flex; align-items: center; justify-content: space-between; }
.game-stat {}
.stat-label { display: block; font-size: .7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; }
.stat-value { font-size: 1rem; font-weight: 700; color: var(--text-primary); }

.game-container { padding-top: 32px; padding-bottom: 80px; max-width: 640px; }
.game-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 36px;
}
.game-screen-title { flex: 1; font-size: 1.25rem; font-weight: 700; }
.game-score-display {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: .875rem;
  font-weight: 600;
  color: var(--accent-blue);
}
.game-score-display svg { width: 15px; height: 15px; }

.pattern-game { display: flex; flex-direction: column; align-items: center; gap: 28px; }
.pattern-status {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  min-height: 32px;
}
.pattern-level { font-size: .875rem; color: var(--text-muted); font-weight: 500; }
.pattern-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  width: 100%;
  max-width: 320px;
}
.pattern-btn {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--c) 20%, var(--bg-card));
  border: 2px solid color-mix(in srgb, var(--c) 40%, transparent);
  transition: all var(--transition);
  box-shadow: var(--neu-shadow-out);
}
.pattern-btn:hover { transform: scale(1.02); }
.pattern-btn.active {
  background: var(--c);
  box-shadow: 0 0 30px color-mix(in srgb, var(--c) 60%, transparent);
  transform: scale(0.96);
}
.pattern-btn.wrong { animation: shake .4s ease; }
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

.memory-game { display: flex; flex-direction: column; align-items: center; gap: 20px; width: 100%; }
.memory-info-bar {
  display: flex;
  gap: 20px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: .875rem;
  color: var(--text-secondary);
}
.memory-info-item { display: flex; align-items: center; gap: 6px; }
.memory-info-item svg { width: 15px; height: 15px; }
.memory-info-item strong { color: var(--text-primary); }
.memory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  width: 100%;
  max-width: 480px;
}
.memory-card {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  cursor: pointer;
  perspective: 600px;
  position: relative;
}
.memory-card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform .4s ease;
  border-radius: var(--radius-sm);
}
.memory-card.flipped .memory-card-inner { transform: rotateY(180deg); }
.memory-card.matched .memory-card-inner { transform: rotateY(180deg); }
.memory-card-front,
.memory-card-back {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  backface-visibility: hidden;
  font-size: 1.5rem;
}
.memory-card-front {
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--neu-shadow-out);
}
.memory-card-front svg { width: 22px; height: 22px; color: var(--text-muted); }
.memory-card-back {
  background: var(--bg-card-hover);
  border: 1px solid rgba(88,166,255,.25);
  transform: rotateY(180deg);
  font-size: 1.6rem;
}
.memory-card.matched .memory-card-back {
  background: rgba(16,185,129,.1);
  border-color: rgba(16,185,129,.4);
}

.numbers-game { display: flex; flex-direction: column; align-items: center; gap: 24px; width: 100%; }
.numbers-level-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(245,158,11,.1);
  border: 1px solid rgba(245,158,11,.25);
  color: var(--accent-amber);
  font-size: .85rem;
  font-weight: 600;
}
.numbers-level-badge svg { width: 14px; height: 14px; }
.numbers-display {
  width: 100%;
  max-width: 360px;
  aspect-ratio: 2/1;
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--neu-shadow-out);
}
.number-text {
  font-size: clamp(2.5rem, 10vw, 4rem);
  font-weight: 800;
  letter-spacing: .1em;
  background: linear-gradient(135deg, var(--accent-amber), var(--accent-red));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.numbers-input-area { display: flex; flex-direction: column; align-items: center; gap: 14px; width: 100%; max-width: 320px; }
.numbers-prompt { font-size: .9rem; color: var(--text-secondary); }
.numbers-input {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  outline: none;
  box-shadow: var(--neu-shadow-in);
  transition: border-color var(--transition);
  -moz-appearance: textfield;
}
.numbers-input::-webkit-outer-spin-button,
.numbers-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.numbers-input:focus { border-color: var(--border-focus); }
.numbers-feedback {
  font-size: 1rem;
  font-weight: 600;
  min-height: 28px;
  transition: all var(--transition);
}
.feedback-correct { color: var(--accent-green); }
.feedback-wrong { color: var(--accent-red); }

.stats-overview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.stat-overview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--neu-shadow-out);
}
.stat-ov-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(88,166,255,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  margin: 0 auto 12px;
}
.stat-ov-icon svg { width: 20px; height: 20px; }
.stat-ov-value { font-size: 2rem; font-weight: 800; margin-bottom: 4px; }
.stat-ov-label { font-size: .8rem; color: var(--text-secondary); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding-bottom: 60px;
}
.stats-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--neu-shadow-out);
}
.stats-card-header { display: flex; align-items: center; gap: 12px; }
.stats-game-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color) 15%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color);
}
.stats-game-icon svg { width: 18px; height: 18px; }
.stats-card-header h3 { font-size: .95rem; font-weight: 600; }
.stats-rows { display: flex; flex-direction: column; gap: 10px; }
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .875rem;
  color: var(--text-secondary);
}
.stat-row strong { color: var(--text-primary); font-weight: 600; }
.stat-bar-container {
  height: 4px;
  background: var(--bg-base);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.stat-bar {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--bar-color, var(--accent-purple)), var(--accent-blue));
  width: 0%;
  transition: width .8s ease;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
  padding: 20px;
}
.modal-overlay.visible { opacity: 1; pointer-events: all; }
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
  transform: scale(.9);
  transition: transform var(--transition-slow);
}
.modal-overlay.visible .modal { transform: scale(1); }
.modal-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(88,166,255,.2), rgba(99,102,241,.2));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 2.5rem;
}
.modal-icon svg { width: 36px; height: 36px; color: var(--accent-blue); }
.modal-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 10px; }
.modal-text { font-size: .9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 28px; }
.modal-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-tagline { font-size: .72rem; color: var(--text-muted); margin-top: 2px; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: .875rem; color: var(--text-secondary); transition: color var(--transition); }
.footer-links a:hover { color: var(--accent-blue); }
.footer-copy { text-align: right; }
.footer-copy p { font-size: .8rem; color: var(--text-muted); line-height: 1.6; }
.footer-domain { color: var(--accent-blue) !important; font-size: .75rem !important; }
.footer-domain a { color: inherit; transition: opacity var(--transition); }
.footer-domain a:hover { opacity: .7; }
.footer-dev { font-size: .75rem; color: var(--text-muted); margin-top: 2px; }
.footer-dev a { color: var(--accent-blue); transition: opacity var(--transition); }
.footer-dev a:hover { opacity: .75; }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

@media (max-width: 768px) {
  .hero .container { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .hero-subtitle { margin: 0 auto 32px; }
  .hero-cta { justify-content: center; }
  .hero-logo-img { max-width: 220px; }

  .nav span { display: none; }
  .nav-btn { padding: 7px 10px; }
  .menu-toggle { display: flex; }

  .tip-card { flex-wrap: wrap; }
  .tip-streak { width: 100%; text-align: left; display: flex; align-items: center; gap: 8px; }
  .streak-number { font-size: 1.4rem; }

  .stats-overview { grid-template-columns: 1fr 1fr; }
  .stats-overview .stat-overview-card:last-child { grid-column: 1 / -1; }

  .memory-grid { grid-template-columns: repeat(4, 1fr); gap: 8px; }
  .game-container { max-width: 100%; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-copy { text-align: left; }
}

@media (max-width: 480px) {
  .hero { padding: 48px 0 40px; }
  .games-grid { grid-template-columns: 1fr; }
  .stats-overview { grid-template-columns: 1fr; }
  .stats-overview .stat-overview-card:last-child { grid-column: auto; }

  .memory-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }

  .pattern-grid { max-width: 260px; gap: 10px; }

  .modal { padding: 28px 20px; }
  .modal-actions { flex-direction: column; }
  .modal-actions .btn { width: 100%; justify-content: center; }
}

.contact-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}
.contact-overlay.visible { opacity: 1; pointer-events: all; }

.contact-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px 32px 32px;
  width: 100%;
  max-width: 340px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0,0,0,.45);
  transform: scale(.92) translateY(12px);
  transition: transform var(--transition-slow);
}
.contact-overlay.visible .contact-card { transform: scale(1) translateY(0); }

.contact-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.contact-close svg { width: 14px; height: 14px; }
.contact-close:hover { color: var(--text-primary); border-color: var(--text-secondary); }

.contact-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(88,166,255,.15), rgba(99,102,241,.15));
  border: 2px solid rgba(88,166,255,.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  overflow: hidden;
  padding: 10px;
}
.contact-avatar img { width: 100%; height: 100%; object-fit: contain; }

.contact-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.contact-role {
  font-size: .82rem;
  color: var(--accent-blue);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: 24px;
}

.contact-links { display: flex; flex-direction: column; gap: 10px; }
.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  transition: all var(--transition);
  text-align: left;
}
.contact-link:hover {
  border-color: var(--border-focus);
  color: var(--text-primary);
  background: var(--bg-card-hover);
}
.contact-link-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(88,166,255,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  flex-shrink: 0;
}
.contact-link-icon svg { width: 15px; height: 15px; }
.contact-link-text { flex: 1; font-size: .875rem; font-weight: 500; }
.contact-link-arrow { width: 14px; height: 14px; opacity: .4; flex-shrink: 0; }
.contact-link:hover .contact-link-arrow { opacity: 1; }

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
  z-index: 150;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}
.drawer-overlay.visible { opacity: 1; pointer-events: all; }

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: 290px;
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  z-index: 160;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  box-shadow: -6px 0 32px rgba(0,0,0,.25);
}
.drawer.open { transform: translateX(0); }

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.drawer-close-btn { flex-shrink: 0; }

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 12px;
}
.drawer-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  text-align: left;
  width: 100%;
}
.drawer-nav-item svg { width: 18px; height: 18px; }
.drawer-nav-item:hover { background: var(--bg-card); color: var(--text-primary); }
.drawer-nav-item.active {
  background: linear-gradient(135deg, rgba(88,166,255,.15), rgba(99,102,241,.15));
  color: var(--accent-blue);
}

.drawer-divider { height: 1px; background: var(--border); margin: 0 12px; }

.drawer-section { padding: 16px 12px; }
.drawer-section-label {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  padding: 0 2px;
  margin-bottom: 10px;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  transition: all var(--transition);
  cursor: pointer;
}
.theme-toggle-btn:hover { border-color: var(--border-focus); }

.theme-toggle-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(88,166,255,.12), rgba(99,102,241,.12));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  flex-shrink: 0;
}
.theme-toggle-icon svg { width: 18px; height: 18px; }

.theme-toggle-info { flex: 1; text-align: left; }
.theme-toggle-name { display: block; font-size: .875rem; font-weight: 600; }
.theme-toggle-hint { display: block; font-size: .75rem; color: var(--text-muted); margin-top: 1px; }

.theme-switch {
  width: 42px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--bg-base);
  border: 1px solid var(--border);
  position: relative;
  transition: all var(--transition);
  flex-shrink: 0;
}
.theme-switch-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform var(--transition), background var(--transition);
}
[data-theme="light"] .theme-switch {
  background: rgba(9,105,218,.15);
  border-color: rgba(9,105,218,.35);
}
[data-theme="light"] .theme-switch-thumb {
  background: var(--accent-blue);
  transform: translateX(18px);
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(88,166,255,.2); }
  50% { box-shadow: 0 0 40px rgba(88,166,255,.5); }
}
@keyframes bounce-in {
  0% { transform: scale(.5); opacity: 0; }
  60% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}
.matched .memory-card-back { animation: bounce-in .4s ease forwards; }

.ttt-game {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  width: 100%;
}

.ttt-difficulty-selector {
  display: flex;
  gap: 8px;
  padding: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
}

.ttt-diff-btn {
  padding: 7px 22px;
  border-radius: var(--radius-full);
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.ttt-diff-btn.active {
  background: linear-gradient(135deg, #f43f5e, #e879f9);
  color: #fff;
  box-shadow: 0 2px 14px rgba(244,63,94,.35);
}

.ttt-status {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  min-height: 28px;
  text-align: center;
  transition: color var(--transition);
}

.ttt-status.status-win  { color: var(--accent-green); }
.ttt-status.status-loss { color: var(--accent-red); }
.ttt-status.status-draw { color: var(--accent-amber); }

.ttt-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  background: var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  width: 100%;
  max-width: 300px;
  box-shadow: var(--neu-shadow-out);
}

.ttt-cell {
  aspect-ratio: 1;
  background: var(--bg-card);
  font-size: 2.8rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  cursor: pointer;
  line-height: 1;
  letter-spacing: -.02em;
  width: 100%;
}

.ttt-cell:hover:not([data-mark]):not(:disabled) {
  background: var(--bg-card-hover);
}

.ttt-cell:disabled { cursor: default; }

.ttt-cell[data-mark="X"] {
  color: #06b6d4;
  animation: ttt-pop .22s cubic-bezier(.34,1.56,.64,1);
}

.ttt-cell[data-mark="O"] {
  color: #a855f7;
  animation: ttt-pop .22s cubic-bezier(.34,1.56,.64,1);
}

.ttt-cell[data-mark="X"].ttt-win {
  background: rgba(6,182,212,.14);
  box-shadow: inset 0 0 0 2px #06b6d4, 0 0 20px rgba(6,182,212,.3);
  animation: ttt-win-bounce .45s cubic-bezier(.34,1.56,.64,1);
}

.ttt-cell[data-mark="O"].ttt-win {
  background: rgba(168,85,247,.14);
  box-shadow: inset 0 0 0 2px #a855f7, 0 0 20px rgba(168,85,247,.3);
  animation: ttt-win-bounce .45s cubic-bezier(.34,1.56,.64,1);
}

@keyframes ttt-pop {
  0%   { transform: scale(0); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes ttt-win-bounce {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.18); }
  100% { transform: scale(1); }
}

.ttt-score-bar {
  display: flex;
  width: 100%;
  max-width: 300px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
}

.ttt-score-item {
  flex: 1;
  padding: 12px 10px;
  text-align: center;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
}

.ttt-score-item:last-child { border-right: none; }

.ttt-score-label {
  display: block;
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.ttt-score-val {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
}

.ttt-score-item:nth-child(1) .ttt-score-val { color: var(--accent-green); }
.ttt-score-item:nth-child(2) .ttt-score-val { color: var(--accent-amber); }
.ttt-score-item:nth-child(3) .ttt-score-val { color: var(--accent-red); }