/* Grid Runner – Neon-Arcade-Variante (Cyan/Tron-Look). */

:root {
  --bg:       #0a0a14;
  --bg-2:     #0a1c2c;
  --fg:       #e8f6ff;
  --muted:    #8fa6c4;
  --accent:   #00e5ff;
  --accent-2: #ff4d8d;
  --board-bg: rgba(255, 255, 255, 0.04);
  --radius:   12px;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  min-height: 100vh;
  background: radial-gradient(900px 500px at 50% -10%, var(--bg-2), var(--bg) 60%);
  color: var(--fg);
  font: 16px/1.5 ui-sans-serif, system-ui, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  display: flex; flex-direction: column; align-items: center;
  overscroll-behavior: none;
}

.bg-grid {
  position: fixed; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 77, 141, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(800px 460px at 50% 0%, #000 30%, transparent 80%);
}

.top {
  width: 100%; max-width: 460px; padding: 1rem 1.1rem 0;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.back { color: var(--muted); text-decoration: none; font-weight: 600; letter-spacing: 0.03em; white-space: nowrap; }
.back:hover { color: var(--accent); }
.scores { display: flex; gap: 0.6rem; }
.score-box {
  display: flex; flex-direction: column; align-items: center; min-width: 76px;
  padding: 0.35rem 0.7rem; background: var(--board-bg);
  border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 10px;
  font-variant-numeric: tabular-nums; font-weight: 800; font-size: 1.2rem;
}
.score-label { font-size: 0.62rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }

.wrap { width: 100%; max-width: 460px; padding: 0.6rem 1.1rem 2.5rem; display: flex; flex-direction: column; align-items: center; }
.title-row { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: 0.4rem 0 0.2rem; }
.game-title {
  margin: 0; font-size: clamp(1.9rem, 7.5vw, 2.6rem); font-weight: 900; letter-spacing: 0.04em;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 14px rgba(0, 229, 255, 0.4));
}
.hint { color: var(--muted); font-size: 0.85rem; margin: 0.2rem 0 0.9rem; width: 100%; display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.lives { display: inline-flex; gap: 0.2rem; }
.lives .life { color: var(--accent); text-shadow: 0 0 8px var(--accent); font-size: 0.95rem; }

.btn {
  font: inherit; font-weight: 700; color: var(--fg);
  background: var(--board-bg); border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px; padding: 0.55rem 1rem; cursor: pointer;
  transition: border-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn-primary { border-color: transparent; background: linear-gradient(90deg, var(--accent), var(--accent-2)); color: #04161a; box-shadow: 0 8px 24px -10px var(--accent); }

/* Spielfeld (Canvas) */
.board {
  position: relative; aspect-ratio: 19 / 21;
  height: min(64vh, 540px); max-width: 100%;
  background: #080812; border: 1px solid rgba(0, 229, 255, 0.18);
  border-radius: var(--radius); overflow: hidden;
  touch-action: none; user-select: none; -webkit-user-select: none;
  box-shadow: 0 0 40px -16px var(--accent);
}
#maze { display: block; width: 100%; height: 100%; }

/* Steuerkreuz */
.pad {
  display: grid; gap: 0.4rem; margin: 0.9rem 0 0;
  grid-template-columns: repeat(3, 3.1rem); grid-template-rows: repeat(2, 3.1rem);
  grid-template-areas: ". up ." "left down right";
}
.pad-up { grid-area: up; } .pad-left { grid-area: left; } .pad-down { grid-area: down; } .pad-right { grid-area: right; }
.padbtn {
  font: inherit; font-size: 1.3rem; font-weight: 800; color: var(--fg);
  background: var(--board-bg); border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px; cursor: pointer;
  transition: border-color 0.12s ease, transform 0.08s ease, background 0.12s ease;
}
.padbtn:hover { border-color: var(--accent); }
.padbtn:active { transform: translateY(1px); background: rgba(0, 229, 255, 0.12); }

/* Overlay (Game Over) */
.overlay {
  position: absolute; inset: 0; z-index: 5;
  display: flex; align-items: center; justify-content: center; padding: 0.8rem;
  background: rgba(8, 8, 16, 0.84); backdrop-filter: blur(3px);
  border-radius: var(--radius); animation: fade-in 0.2s ease;
}
.overlay[hidden] { display: none; }
.overlay-card { position: relative; width: 100%; text-align: center; }
.overlay-close {
  position: absolute; top: 0.2rem; right: 0.2rem;
  width: 1.8rem; height: 1.8rem; border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16); background: rgba(255, 255, 255, 0.05);
  color: var(--muted); font-size: 0.85rem; font-weight: 800; cursor: pointer; line-height: 1;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.overlay-close:hover { color: var(--fg); border-color: var(--accent); }
.overlay-title {
  margin: 0 0 0.3rem; font-size: clamp(1.5rem, 7vw, 2rem); font-weight: 900;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.overlay-sub { margin: 0 0 1rem; color: var(--fg); font-weight: 700; }
.overlay-actions { display: flex; gap: 0.7rem; justify-content: center; margin-top: 0.3rem; }

/* Bestenlisten-Eintrag */
.lb-form { margin: 0 0 1rem; }
.lb-form-label { display: block; font-size: 0.8rem; font-weight: 700; color: var(--accent); margin-bottom: 0.4rem; }
.lb-form-row { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }
#gr-name {
  flex: 1; min-width: 7rem; font: inherit; font-weight: 700; color: var(--fg);
  background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px; padding: 0.55rem 0.7rem;
}
#gr-name:focus { outline: none; border-color: var(--accent); }
.lb-result { margin: 0 0 1rem; font-weight: 800; color: var(--accent); }

/* Bestenliste-Panel */
.leaderboard { width: 100%; max-width: 460px; margin-top: 1.6rem; }
.lb-title { margin: 0 0 0.6rem; font-size: 0.72rem; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.lb-list { list-style: none; margin: 0; padding: 0; }
.lb-empty { color: var(--muted); font-size: 0.9rem; padding: 0.4rem 0; }
.lb-row {
  display: grid; grid-template-columns: 2.6rem 1fr auto; align-items: center; gap: 0.6rem;
  padding: 0.5rem 0.7rem; margin-bottom: 0.35rem;
  border: 1px solid rgba(255, 255, 255, 0.07); border-radius: 10px; background: var(--board-bg);
}
.lb-rank { font-weight: 800; color: var(--muted); font-variant-numeric: tabular-nums; }
.lb-name { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb-score { font-weight: 800; font-variant-numeric: tabular-nums; }
.lb-row--me { border-color: color-mix(in srgb, var(--accent) 65%, transparent); box-shadow: 0 0 22px -10px var(--accent); }
.lb-row--me .lb-rank { color: var(--accent); }

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .overlay { animation: none; } }