:root {
  --bg: #000;
  --surface-top: oklch(0.16 0.006 260);
  --surface-bottom: oklch(0.11 0.006 260);
  --code-surface: oklch(0.05 0.006 260);
  --nav-surface: oklch(0.1 0.006 260 / 0.55);

  --border-hairline: oklch(1 0 0 / 0.08);
  --border: oklch(1 0 0 / 0.1);
  --border-strong: oklch(1 0 0 / 0.14);
  --border-hover: oklch(1 0 0 / 0.24);

  --text-primary: oklch(0.93 0.006 260);
  --text-68: oklch(0.68 0.01 260);
  --text-60: oklch(0.6 0.01 260);
  --text-55: oklch(0.55 0.01 260);
  --text-48: oklch(0.48 0.01 260);

  --accent-1: oklch(0.72 0.19 150);
  --accent-2: oklch(0.6 0.2 155);

  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius-card: 14px;
  --radius-control: 10px;
  --radius-chip: 8px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
p {
  margin: 0;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* nav */

.nav-wrap {
  padding: 16px 24px 0;
}

.nav-card {
  max-width: 1080px;
  margin: 0 auto;
  backdrop-filter: blur(14px);
  background: var(--nav-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
}

.nav-brand a {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  color: var(--accent-1);
  font-family: var(--font-mono);
  font-size: 12px;
}

.nav-brand-name {
  color: var(--accent-1);
  font-weight: 600;
}

.nav-brand-sep {
  color: var(--text-48);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-68);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: oklch(0.95 0.006 260);
}

@media (max-width: 480px) {
  .nav-links {
    gap: 14px;
  }
}

/* hero */

.hero {
  text-align: center;
  padding: 88px 24px 56px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 650;
  letter-spacing: -0.02em;
  max-width: 720px;
  margin: 0 auto 16px;
}

.hero p {
  color: var(--text-60);
  font-size: 17px;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 32px;
  }
}

/* game grid */

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  padding: 0 24px 96px;
  max-width: 1080px;
  margin: 0 auto;
}

.game-card {
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, var(--surface-top), var(--surface-bottom));
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.game-card-preview {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--code-surface);
}

.game-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.game-card-title {
  font-size: 18px;
  font-weight: 650;
  margin-bottom: 8px;
}

.game-card-tagline {
  color: var(--text-60);
  font-size: 14px;
  margin-bottom: 16px;
}

.tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.tag {
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 12px;
  color: var(--text-68);
  font-family: var(--font-mono);
}

.play-btn {
  display: block;
  text-align: center;
  text-decoration: none;
  margin-top: auto;
  background: linear-gradient(180deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 1px 0 oklch(1 0 0 / 0.25) inset, 0 8px 24px oklch(0.6 0.2 155 / 0.35);
  color: oklch(0.12 0.006 260);
  font-weight: 700;
  font-size: 15px;
  padding: 12px 22px;
  border-radius: var(--radius-control);
  transition: filter 0.15s ease;
}

.play-btn:hover {
  filter: brightness(1.08);
}

footer {
  text-align: center;
  color: var(--text-48);
  font-size: 13px;
  padding: 0 24px 64px;
}

.empty-state {
  text-align: center;
  color: var(--text-55);
  padding: 64px 24px;
}

/* play page */

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-1);
  text-decoration: none;
  font-size: 14px;
  margin: 32px 0 20px;
}

.back-link:hover {
  filter: brightness(1.1);
}

.play-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  padding-bottom: 96px;
  align-items: start;
}

@media (max-width: 860px) {
  .play-layout {
    grid-template-columns: 1fr;
  }
}

.stage-card {
  background: linear-gradient(180deg, var(--surface-top), var(--surface-bottom));
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.stage {
  position: relative;
  width: 100%;
  aspect-ratio: 440 / 470;
  background: #000;
}

.stage iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.stage-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: oklch(0 0 0 / 0.55);
  backdrop-filter: blur(1px);
  transition: opacity 0.15s ease;
}

.stage-overlay[hidden] {
  display: none;
}

.stage-overlay.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.play-overlay-btn {
  background: var(--accent-1);
  color: oklch(0.12 0.006 260);
  border: none;
  border-radius: var(--radius-control);
  font-weight: 700;
  font-size: 16px;
  padding: 16px 48px;
  cursor: pointer;
  box-shadow: 0 8px 30px oklch(0 0 0 / 0.5);
  transition: filter 0.15s ease;
}

.play-overlay-btn:hover {
  filter: brightness(1.08);
}

.info-panel {
  background: linear-gradient(180deg, var(--surface-top), var(--surface-bottom));
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
}

.info-panel h1 {
  font-size: 22px;
  font-weight: 650;
  margin-bottom: 12px;
}

.info-panel-desc {
  color: var(--text-68);
  font-size: 14px;
  margin-bottom: 16px;
}

.info-divider {
  border: none;
  border-top: 1px solid var(--border-hairline);
  margin: 20px 0;
}

.info-heading {
  font-size: 13px;
  font-weight: 650;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.controls-box {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-chip);
  background: var(--code-surface);
  color: var(--accent-1);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 12px 14px;
}

.desktop-note {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-55);
  font-size: 13px;
  margin-top: 20px;
}