:root {
  color-scheme: dark;
  --bg: #0a0a0b;
  --bg-2: #111114;
  --surface: #131318;
  --text: #fafafa;
  --muted: #a1a1aa;
  --dim: #71717a;
  --faint: #3f3f46;
  --accent: #93c5fd;
  --accent-strong: #60a5fa;
  --danger: #f87171;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --radius: 8px;
  --radius-lg: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-tap-highlight-color: transparent;
}

body {
  background: var(--bg);
  background-image: radial-gradient(ellipse at top, rgba(96, 165, 250, 0.05), transparent 60%);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  font-size: 16px;
  line-height: 1.6;
}
body.game-body { overflow: hidden; }

a { color: inherit; }
.link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}
.link:hover { border-bottom-color: var(--accent); }

/* ---------- Top nav (tabs in top-left) ---------- */
.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1rem 1.75rem;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 11, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav-brand {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}

.nav-divider {
  width: 1px;
  height: 18px;
  background: var(--border-strong);
}

.nav-tabs {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-tab {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.45rem 0.85rem;
  border-radius: 6px;
  transition: color .15s, background-color .15s;
}
.nav-tab:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}
.nav-tab.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

/* ---------- Page layout ---------- */
main.page {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
  max-width: 44rem;
  margin: 0 auto;
  width: 100%;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-strong);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  margin: 0 0 1.25rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--text);
}

h2 {
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  margin: 0 0 0.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

p {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
  max-width: 38ch;
}

.lead { font-size: 1.1rem; }

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

.cta-row { margin-top: 2rem; display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

.domain {
  margin-top: 2.5rem;
  font-family: var(--mono);
  color: var(--dim);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--text);
  color: #0a0a0b;
  border: 1px solid var(--text);
  padding: 0.6rem 1.2rem;
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: opacity .15s, transform .12s;
  touch-action: manipulation;
}
.btn:hover { opacity: 0.9; }
.btn:active { transform: translateY(1px); }

.btn.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn.btn-ghost:hover { background: rgba(255, 255, 255, 0.04); opacity: 1; }

/* ---------- Footer ---------- */
.footer {
  padding: 1.25rem 1.75rem;
  border-top: 1px solid var(--border);
  color: var(--dim);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer .footer-links { display: flex; gap: 1.25rem; }
.footer a { color: var(--dim); text-decoration: none; transition: color .15s; }
.footer a:hover { color: var(--text); }

/* ---------- Game page ---------- */
.game-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  gap: 1rem;
  width: 100%;
}

.game-info {
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
}
.game-info kbd {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 0.05rem 0.4rem;
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--text);
}

.canvas-stage {
  position: relative;
  width: 100%;
  max-width: min(880px, calc(100vh - 220px) * 1.3333);
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-strong);
  overflow: hidden;
  background: #050507;
}
canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

.game-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 5, 7, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  overflow-y: auto;
  padding: 1rem;
}
.game-overlay.visible { opacity: 1; pointer-events: auto; }

.game-overlay-inner {
  text-align: center;
  padding: 1.5rem;
  width: 100%;
  max-width: 480px;
}
.game-overlay-inner .menu-wide { max-width: 100%; }

.menu { display: flex; flex-direction: column; align-items: center; gap: 0.75rem; }
.menu[hidden] { display: none; }
.menu h2 {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.5rem, 4vw, 2rem);
  letter-spacing: 0.18em;
  font-weight: 700;
  color: var(--text);
}
.menu-eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--accent-strong);
  margin: 0;
  padding: 0.25rem 0.6rem;
  border: 1px solid rgba(96, 165, 250, 0.35);
  border-radius: 4px;
  background: rgba(96, 165, 250, 0.08);
}
.menu-eyebrow.danger {
  color: #fca5a5;
  border-color: rgba(248, 113, 113, 0.4);
  background: rgba(248, 113, 113, 0.08);
}
.menu-sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 36ch;
}

.menu-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--text);
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  width: 100%;
  max-width: 380px;
}
.menu-stats .kk { color: var(--dim); font-size: 0.72rem; letter-spacing: 0.18em; margin-right: 0.4rem; }

.menu-cash {
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  padding: 0.5rem 1rem;
  border: 1px solid rgba(96, 165, 250, 0.3);
  border-radius: 999px;
  background: rgba(96, 165, 250, 0.08);
  color: var(--accent);
}

.menu-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 0.5rem;
}

/* Upgrade list */
.upgrade-list {
  display: grid;
  gap: 0.5rem;
  width: 100%;
  max-width: 600px;
  max-height: 50vh;
  overflow-y: auto;
  padding: 0.25rem;
  text-align: left;
}
.upgrade-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color .15s, background-color .15s;
}
.upgrade-row.maxed { opacity: 0.55; }
.upgrade-row.locked { opacity: 0.5; }
.upgrade-row.affordable { border-color: rgba(96, 165, 250, 0.35); background: rgba(96, 165, 250, 0.05); }

.upgrade-meta { min-width: 0; }
.upgrade-name {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--text);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.upgrade-name .lvl {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--dim);
  font-weight: 500;
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}
.upgrade-name .owned {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: #86efac;
  font-weight: 600;
  padding: 0.1rem 0.4rem;
  border: 1px solid rgba(134, 239, 172, 0.4);
  border-radius: 4px;
  background: rgba(134, 239, 172, 0.08);
}
.upgrade-desc {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.2rem;
  line-height: 1.45;
}
.upgrade-buy {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  background: var(--text);
  color: #0a0a0b;
  border: 1px solid var(--text);
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 600;
  transition: opacity .15s;
}
.upgrade-buy:disabled { opacity: 0.35; cursor: not-allowed; }
.upgrade-buy:hover:not(:disabled) { opacity: 0.9; }
.upgrade-buy.maxed-btn { background: transparent; color: var(--dim); border-color: var(--border-strong); }

/* Leaderboard */
.lb-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  max-width: 480px;
}
.lb-controls input {
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-align: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 0.55rem 0.7rem;
  color: var(--text);
  text-transform: uppercase;
  outline: none;
  transition: border-color .15s;
}
.lb-controls input:focus { border-color: var(--accent-strong); }
.lb-controls input#lb-code { width: 6.5rem; }
.lb-controls input#lb-name { width: 4.5rem; }

.lb-status {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  min-height: 1rem;
  letter-spacing: 0.04em;
}
.lb-status.error { color: #fca5a5; }
.lb-status.ok { color: #86efac; }

.lb-list {
  width: 100%;
  max-width: 480px;
  max-height: 38vh;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--mono);
  font-size: 0.88rem;
}
.lb-list:empty { display: none; }
.lb-row {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  gap: 0.75rem;
  padding: 0.5rem 0.85rem;
  border-bottom: 1px solid var(--border);
  letter-spacing: 0.05em;
}
.lb-row:last-child { border-bottom: 0; }
.lb-row .rank { color: var(--dim); }
.lb-row .name { color: var(--text); }
.lb-row .time { color: var(--accent); }
.lb-row.top1 .rank { color: #fcd34d; }
.lb-row.top2 .rank { color: #e2e8f0; }
.lb-row.top3 .rank { color: #fdba74; }

/* ---------- Responsive ---------- */
.desktop-only { display: inline; }
.mobile-only { display: none; }
@media (hover: none) and (pointer: coarse) {
  .desktop-only { display: none; }
  .mobile-only { display: inline; }
}

@media (max-width: 720px) {
  .nav { padding: 0.85rem 1.1rem; gap: 1rem; }
  .nav-divider { display: none; }
  .nav-brand { font-size: 0.72rem; }
  .nav-tabs { gap: 0.1rem; }
  .nav-tab { padding: 0.35rem 0.6rem; font-size: 0.85rem; }
  main.page { padding: 3rem 1.25rem; }
  .footer { padding: 1rem 1.1rem; flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .eyebrow .dot { animation: none; }
  * { transition: none !important; }
}