:root {
  --bg: #061426;
  --bg-alt: #0c223d;
  --panel: #102e53;
  --line: #1c4d82;
  --text: #f2f7ff;
  --muted: #b9cadf;
  --accent: #f03a3a;
  --accent-2: #ffd24a;
  --success: #45d48f;
  --shadow: rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, #1c3f6f 0%, rgba(28, 63, 111, 0) 40%),
    radial-gradient(circle at 90% 20%, #611a1a 0%, rgba(97, 26, 26, 0) 45%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  min-height: 100vh;
}

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

.container {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(5, 16, 31, 0.9);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  gap: 1rem;
}

.brand {
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1rem;
  font-weight: 700;
}

.nav-links a {
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(240, 58, 58, 0.2);
}

.hero {
  margin: 1.25rem 0;
  background: linear-gradient(120deg, #0f2b4d 0%, #7d1f1f 120%);
  border: 1px solid #2a507e;
  border-radius: 16px;
  padding: clamp(1.2rem, 2vw, 2rem);
  box-shadow: 0 12px 28px var(--shadow);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.hero p {
  margin: 0.8rem 0 0;
  color: var(--muted);
  max-width: 65ch;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  font-weight: 800;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn.primary {
  background: var(--accent);
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.grid {
  display: grid;
  gap: 1rem;
}

.games-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 8px 20px var(--shadow);
}

.card h3,
.card h2 {
  margin-top: 0;
}

.badge {
  display: inline-block;
  margin-bottom: 0.6rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  text-transform: uppercase;
}

.panel {
  margin-top: 1.25rem;
}

.game-wrap {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 1rem;
}

@media (max-width: 900px) {
  .game-wrap {
    grid-template-columns: 1fr;
  }
}

.game-canvas {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #031020;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0.8rem 0;
}

.stat {
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  min-width: 90px;
}

.stat-label {
  font-size: 0.73rem;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 900;
}

.controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.7rem;
}

.leaderboard-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.tab {
  flex: 1;
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.2);
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
}

.tab.active {
  border-color: var(--accent);
  background: rgba(240, 58, 58, 0.2);
}

.score-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.45rem;
}

.score-row {
  display: grid;
  grid-template-columns: 2.2rem 1fr auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.4rem 0.55rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.2);
}

.score-rank {
  color: var(--accent-2);
  font-weight: 800;
}

.score-name {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.score-value {
  font-weight: 900;
}

.field {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.75rem;
}

input[type="text"] {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.22);
  color: var(--text);
}

.site-footer {
  margin-top: 2rem;
  padding: 1rem 0 2rem;
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
}

.notice {
  color: var(--success);
  font-weight: 700;
  min-height: 1.25rem;
}