:root {
  --cyan: #2bd1ff;
  --pink: #ff37c0;
  --green: #39ff8b;
  --gold: #ffd23f;
  --bg: #06070f;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  height: 100%;
  background: radial-gradient(circle at 50% 0%, #141a35 0%, var(--bg) 70%);
  color: #eaf6ff;
  font-family: 'Courier New', ui-monospace, monospace;
  overflow: hidden;
  user-select: none;
  touch-action: none;
}

#stage {
  position: relative;
  height: 100%;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#game {
  height: 100%;
  width: auto;
  aspect-ratio: 600 / 1000;
  display: block;
  background: #06070f;
  box-shadow: 0 0 40px rgba(43, 209, 255, 0.25), inset 0 0 60px rgba(0, 0, 0, 0.6);
  border: 2px solid rgba(43, 209, 255, 0.4);
  border-radius: 10px;
}
/* When the viewport is narrower than the playfield ratio, fit to width instead. */
@media (max-aspect-ratio: 600 / 1000) {
  #game { width: 100%; height: auto; }
}

/* ---- overlay screens ---- */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 6, 16, 0.78);
  backdrop-filter: blur(3px);
  z-index: 20;
}
.screen.hidden { display: none; }

.panel {
  width: min(86%, 420px);
  max-height: 92%;
  overflow-y: auto;
  padding: 28px 26px;
  text-align: center;
  background: rgba(10, 14, 34, 0.92);
  border: 1px solid rgba(43, 209, 255, 0.5);
  border-radius: 14px;
  box-shadow: 0 0 30px rgba(43, 209, 255, 0.3);
}

.logo {
  font-size: 44px;
  margin: 0 0 4px;
  letter-spacing: 3px;
  font-weight: 900;
  color: var(--cyan);
  text-shadow: 0 0 14px var(--cyan);
}
.logo span { color: var(--pink); text-shadow: 0 0 14px var(--pink); }

.tagline { color: #9fb6d8; font-size: 13px; margin: 0 0 22px; letter-spacing: 1px; }

h2 { font-size: 24px; margin: 0 0 16px; color: var(--cyan); text-shadow: 0 0 10px var(--cyan); letter-spacing: 2px; }

.btn {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 13px;
  font-family: inherit;
  font-size: 16px;
  font-weight: bold;
  letter-spacing: 2px;
  color: #eaf6ff;
  background: rgba(43, 209, 255, 0.08);
  border: 1px solid var(--cyan);
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.08s, box-shadow 0.15s, background 0.15s;
}
.btn:hover { box-shadow: 0 0 16px rgba(43, 209, 255, 0.6); background: rgba(43, 209, 255, 0.18); }
.btn:active { transform: scale(0.97); }
.btn.primary { color: #06070f; background: var(--cyan); border-color: var(--cyan); text-shadow: none; }
.btn.primary:hover { box-shadow: 0 0 22px var(--cyan); }
.btn.ghost { border-color: rgba(159, 182, 216, 0.4); color: #9fb6d8; }

.help { margin-top: 18px; font-size: 12px; color: #7f93b5; line-height: 1.8; }

#name-input {
  width: 100%;
  padding: 14px;
  margin-bottom: 8px;
  font-family: inherit;
  font-size: 26px;
  text-align: center;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--gold);
  border-radius: 8px;
  outline: none;
  text-shadow: 0 0 8px var(--gold);
}

/* ---- game over ---- */
.go-score-wrap { margin: 10px 0 18px; }
.go-score { font-size: 48px; font-weight: 900; color: var(--gold); text-shadow: 0 0 18px var(--gold); }
.go-label { font-size: 12px; letter-spacing: 4px; color: #9fb6d8; }
#go-rank { color: var(--pink); text-shadow: 0 0 12px var(--pink); }
.go-stats { display: flex; justify-content: center; gap: 30px; margin-bottom: 18px; }
.go-stats div { display: flex; flex-direction: column; }
.go-stats b { font-size: 22px; color: var(--cyan); }
.go-stats span { font-size: 11px; color: #9fb6d8; margin-top: 2px; }

/* ---- leaderboard ---- */
.board-panel { width: min(94%, 480px); }
.tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.tab {
  flex: 1; padding: 10px; font-family: inherit; font-size: 14px; font-weight: bold; letter-spacing: 1px;
  color: #9fb6d8; background: transparent; border: 1px solid rgba(159, 182, 216, 0.3);
  border-radius: 8px; cursor: pointer;
}
.tab.active { color: #06070f; background: var(--cyan); border-color: var(--cyan); }

.board-list { min-height: 260px; max-height: 52vh; overflow-y: auto; margin-bottom: 14px; text-align: left; }
.board-row {
  display: grid; grid-template-columns: 42px 1fr 88px 52px 86px; align-items: center;
  padding: 7px 8px; font-size: 13px; border-bottom: 1px solid rgba(159, 182, 216, 0.1);
}
.board-row .bk { color: #7f93b5; }
.board-row .bn { color: #eaf6ff; font-weight: bold; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.board-row .bs { color: var(--gold); text-align: right; }
.board-row .bc { color: var(--green); text-align: right; }
.board-row .bt { color: #7f93b5; text-align: right; font-size: 11px; }
.board-head { color: #7f93b5; font-weight: bold; border-bottom: 1px solid rgba(43, 209, 255, 0.4); position: sticky; top: 0; background: rgba(10, 14, 34, 0.96); }
.board-head span { color: #7f93b5 !important; }
.board-row.mine { background: rgba(43, 209, 255, 0.12); border-radius: 6px; }
.board-row.top1 .bk { color: var(--gold); text-shadow: 0 0 8px var(--gold); }
.board-row.top2 .bk { color: #cfd8e6; }
.board-row.top3 .bk { color: #e08a3c; }
.board-msg { padding: 40px 10px; text-align: center; color: #9fb6d8; line-height: 1.8; }
.board-msg span { color: #ff6b6b; font-size: 12px; }

.stats-row { display: flex; justify-content: space-around; margin-bottom: 12px; padding-bottom: 12px; border-bottom: 1px solid rgba(43, 209, 255, 0.3); }
.stats-row div { display: flex; flex-direction: column; align-items: center; }
.stats-row b { font-size: 18px; color: var(--cyan); }
.stats-row span { font-size: 10px; color: #9fb6d8; margin-top: 2px; }

/* ---- floating controls ---- */
.mute-btn {
  position: absolute; top: 12px; right: 12px; z-index: 30;
  width: 40px; height: 40px; font-size: 18px; line-height: 1;
  background: rgba(10, 14, 34, 0.7); color: #eaf6ff;
  border: 1px solid rgba(43, 209, 255, 0.4); border-radius: 8px; cursor: pointer;
}
.mute-btn.off { opacity: 0.6; }

.launch-btn {
  position: absolute; bottom: 18px; right: 16px; z-index: 25; display: none;
  padding: 16px 22px; font-family: inherit; font-size: 16px; font-weight: bold; letter-spacing: 2px;
  color: #06070f; background: var(--green); border: none; border-radius: 10px;
  box-shadow: 0 0 18px rgba(57, 255, 139, 0.6); cursor: pointer;
}
body.touch .launch-btn { display: block; }