:root {
  color-scheme: dark;
  --bg-1: #071018;
  --bg-2: #10243a;
  --panel: rgba(7, 19, 33, 0.72);
  --panel-strong: rgba(10, 24, 40, 0.88);
  --line: rgba(132, 204, 255, 0.16);
  --text: #edf5ff;
  --muted: #9cb6d1;
  --accent: #7dd3fc;
  --accent-2: #38bdf8;
  --accent-3: #f59e0b;
  --good: #22c55e;
  --danger: #fb7185;
  --shadow: 0 24px 70px rgba(1, 10, 19, 0.38);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 18%, rgba(56, 189, 248, 0.17), transparent 24%),
    radial-gradient(circle at 82% 22%, rgba(245, 158, 11, 0.11), transparent 18%),
    radial-gradient(circle at 50% 105%, rgba(34, 197, 94, 0.11), transparent 28%),
    linear-gradient(140deg, var(--bg-1), var(--bg-2));
  font-family: "Trebuchet MS", "Avenir Next Condensed", "Segoe UI", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at center, black 58%, transparent 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  width: min(1120px, calc(100% - 28px));
  margin: 0 auto;
}

.hero {
  padding: 26px 0 18px;
}

.hero-card,
.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  padding: 26px;
  display: grid;
  gap: 20px;
}

.hero-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border-radius: 999px;
  font-size: 0.88rem;
  color: var(--muted);
  border: 1px solid rgba(125, 211, 252, 0.2);
  background: rgba(7, 20, 31, 0.58);
}

.badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.7);
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
  color: var(--accent);
}

.hero h1,
.page-title {
  margin: 0;
  line-height: 0.96;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(2.8rem, 8vw, 5.6rem);
}

.page-title {
  font-size: clamp(2rem, 7vw, 4rem);
}

.lede {
  margin: 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.68;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat {
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(125, 211, 252, 0.16);
  background: var(--panel);
}

.stat strong {
  display: block;
  font-size: 1.55rem;
  letter-spacing: -0.04em;
}

.stat span {
  color: var(--muted);
  font-size: 0.92rem;
}

.portal-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 18px;
  padding-bottom: 42px;
}

.panel {
  padding: 22px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1.3rem;
}

.muted {
  color: var(--muted);
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.game-card {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(125, 211, 252, 0.14);
  background: linear-gradient(180deg, rgba(3, 13, 24, 0.78), rgba(11, 26, 44, 0.92));
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.game-card:hover {
  transform: translateY(-3px);
  border-color: rgba(125, 211, 252, 0.35);
  box-shadow: 0 18px 36px rgba(0, 8, 16, 0.36);
}

.game-card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.game-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  color: #d9ecff;
  background: rgba(56, 189, 248, 0.13);
  border: 1px solid rgba(56, 189, 248, 0.15);
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: fit-content;
  padding: 12px 16px;
  border-radius: 999px;
  font-weight: 700;
  color: #04111d;
  background: linear-gradient(180deg, #9be5ff, #5ac8ff);
  box-shadow: 0 12px 30px rgba(56, 189, 248, 0.3);
}

.list {
  display: grid;
  gap: 10px;
}

.list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.list-item b {
  font-weight: 700;
}

.page-shell {
  width: min(1180px, calc(100% - 24px));
  margin: 0 auto;
  padding: 18px 0 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.topbar a {
  color: var(--accent);
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
}

.game-panel {
  padding: 18px;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 18px;
}

.pill {
  min-width: 102px;
  padding: 11px 13px;
  border-radius: 14px;
  border: 1px solid rgba(125, 211, 252, 0.15);
  background: var(--panel);
}

.pill-label {
  display: block;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.pill-value {
  display: block;
  margin-top: 5px;
  font-size: 1.3rem;
  font-weight: 700;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

button,
.button-link {
  appearance: none;
  border: 0;
  border-radius: 14px;
  padding: 12px 16px;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  color: #071018;
  background: linear-gradient(180deg, #9be5ff, #55c7fd);
  transition: transform 150ms ease, filter 150ms ease;
}

button.secondary,
.button-link.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

button:hover,
.button-link:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
}

.helper {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.kbd-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

kbd {
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  font-family: inherit;
  font-size: 0.86rem;
  color: var(--text);
}

.footer-note {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.92rem;
}

.grid2048 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 14px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.06);
}

.tile {
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: clamp(1.1rem, 4vw, 2rem);
  font-weight: 800;
  color: #08212d;
  background: rgba(255, 255, 255, 0.08);
  transition: transform 120ms ease, background 120ms ease;
}

.tile.empty {
  color: transparent;
  background: rgba(255, 255, 255, 0.04);
}

.tile[data-value="2"] { background: #cffafe; }
.tile[data-value="4"] { background: #bae6fd; }
.tile[data-value="8"] { background: #7dd3fc; }
.tile[data-value="16"] { background: #38bdf8; }
.tile[data-value="32"] { background: #f59e0b; }
.tile[data-value="64"] { background: #fb7185; }
.tile[data-value="128"] { background: #c4b5fd; }
.tile[data-value="256"] { background: #a78bfa; }
.tile[data-value="512"] { background: #818cf8; }
.tile[data-value="1024"] { background: #22c55e; }
.tile[data-value="2048"] { background: #fde047; }

.snake-wrap {
  display: grid;
  gap: 14px;
}

#snakeCanvas {
  width: min(100%, 620px);
  max-width: 100%;
  aspect-ratio: 1 / 1;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent),
    #06111c;
  border: 1px solid rgba(125, 211, 252, 0.18);
  border-radius: 22px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.touch-pad {
  display: none;
  grid-template-columns: repeat(3, 70px);
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
}

.touch-pad button {
  padding: 14px 0;
}

@media (max-width: 940px) {
  .portal-grid,
  .game-layout {
    grid-template-columns: 1fr;
  }

  .stats,
  .game-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .hero-card,
  .panel {
    padding: 18px;
  }

  .touch-pad {
    display: grid;
  }
}