:root {
  color-scheme: dark;
  --bg: #111116;
  --bg-2: #18181f;
  --panel: rgba(245, 244, 235, 0.08);
  --panel-strong: rgba(245, 244, 235, 0.15);
  --ink: #f5f4eb;
  --muted: #a6a391;
  --line: rgba(245, 244, 235, 0.18);
  --cyan: #42d7ff;
  --coral: #ff4e63;
  --gold: #f2c14e;
  --green: #57e389;
  --violet: #9e7bff;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Avenir Next Condensed", "DIN Condensed", sans-serif;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, transparent, #000 10%, #000 90%, transparent);
  z-index: 0;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--gold); }

/* ── Hero ── */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 60px 20px;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 10%, rgba(255,78,99,0.18), transparent 28%),
    radial-gradient(circle at 82% 22%, rgba(66,215,255,0.16), transparent 26%),
    linear-gradient(135deg, #111116 0%, #16151b 52%, #101014 100%);
  text-align: center;
  z-index: 1;
}

.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(66,215,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,78,99,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: gridDrift 24s linear infinite;
}

@keyframes gridDrift {
  from { background-position: 0 0; }
  to { background-position: 40px 40px; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 12px;
}

.logo-mark {
  width: 48px;
  height: 48px;
  flex: 0 0 auto;
  border: 2px solid var(--ink);
  background:
    linear-gradient(90deg, transparent 45%, var(--ink) 45% 55%, transparent 55%),
    linear-gradient(var(--cyan), var(--cyan)) 7px 7px / 12px 12px no-repeat,
    linear-gradient(var(--coral), var(--coral)) 27px 27px / 12px 12px no-repeat,
    var(--bg);
  box-shadow: 6px 6px 0 var(--coral);
}

.logo h1 {
  margin: 0;
  font-size: clamp(36px, 10vw, 56px);
  line-height: 1;
  letter-spacing: 2px;
}

.tagline {
  margin: 8px 0 32px;
  color: var(--muted);
  font-size: clamp(16px, 4vw, 20px);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  transition: all 180ms ease;
  cursor: pointer;
}

.btn-primary {
  border-color: rgba(87,227,137,0.7);
  background: rgba(87,227,137,0.13);
  color: var(--green);
}
.btn-primary:hover {
  background: rgba(87,227,137,0.22);
  color: var(--green);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(87,227,137,0.14);
}

.btn-secondary {
  background: var(--panel);
  color: var(--ink);
}
.btn-secondary:hover {
  background: var(--panel-strong);
  color: var(--ink);
  transform: translateY(-1px);
}

.hero-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  opacity: 0.7;
}

.scroll-hint {
  position: absolute;
  bottom: 30px;
  color: var(--muted);
  font-size: 13px;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ── Sections ── */
.section {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 80px 24px;
}

.section h2 {
  margin: 0 0 32px;
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.2;
  text-align: center;
}

/* ── Game Grid ── */
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.game-card {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font-size: 15px;
  transition: all 140ms ease;
}
.game-card:hover {
  border-color: rgba(66,215,255,0.4);
  background: rgba(66,215,255,0.08);
  transform: translateY(-2px);
}

.game-icon { font-size: 20px; }

/* ── Features ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.feature-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.feature-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
}
.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

/* ── Tech ── */
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-list code {
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--cyan);
  font-size: 14px;
}

/* ── Footer ── */
.footer {
  position: relative;
  z-index: 1;
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--line);
}

.footer p {
  margin: 6px 0;
  color: var(--muted);
  font-size: 13px;
}

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

/* ── Mobile ── */
@media (max-width: 480px) {
  .section { padding: 60px 16px; }
  .game-grid { grid-template-columns: repeat(3, 1fr); }
  .game-card { padding: 12px 8px; font-size: 13px; justify-content: center; }
  .game-icon { font-size: 18px; }
}