* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background:
    radial-gradient(circle at 20% 15%, rgba(0, 240, 255, 0.12), transparent 45%),
    radial-gradient(circle at 80% 85%, rgba(224, 64, 251, 0.12), transparent 45%),
    #05060f fixed;
  color: #fff;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  touch-action: pan-y;
  user-select: none;
}

#game-container {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Lobby ── */
#lobby { text-align: center; padding: 40px; }

#lobby h1 {
  font-size: 72px;
  letter-spacing: 20px;
  background: linear-gradient(90deg, #00f0ff, #e040fb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 14px rgba(0, 240, 255, 0.45)) drop-shadow(0 0 22px rgba(224, 64, 251, 0.35));
  margin-bottom: 8px;
}

.tagline {
  color: #666;
  font-size: 16px;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 40px;
}

#lobby-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.btn {
  padding: 14px 44px;
  font-size: 18px;
  font-weight: 700;
  border: 2px solid;
  border-radius: 6px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: all 0.2s;
  background: transparent;
  position: relative;
  z-index: 2;
}

.btn-cyan { color: #00f0ff; border-color: #00f0ff; }
.btn-cyan:hover { background: rgba(0,240,255,0.15); box-shadow: 0 0 20px rgba(0,240,255,0.3); }
.btn-magenta { color: #e040fb; border-color: #e040fb; }
.btn-magenta:hover { background: rgba(224,64,251,0.15); box-shadow: 0 0 20px rgba(224,64,251,0.3); }

.divider { color: #444; font-size: 14px; text-transform: uppercase; letter-spacing: 3px; }

#join-section { display: flex; gap: 10px; align-items: center; }

#join-code {
  padding: 12px 16px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 6px;
  text-transform: uppercase;
  text-align: center;
  width: 170px;
  border: 2px solid #333;
  border-radius: 6px;
  background: #111;
  color: #fff;
  outline: none;
  transition: border-color 0.2s;
}
#join-code:focus { border-color: #e040fb; }
#join-code::placeholder { font-size: 12px; letter-spacing: 1px; color: #555; }

#lobby-status { margin-top: 28px; }
#lobby-status p { color: #888; margin-bottom: 10px; }

#room-code-box p { color: #666; font-size: 14px; margin-bottom: 8px; }

#room-code {
  display: inline-block;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: 10px;
  color: #00f0ff;
  padding: 10px 24px;
  border: 2px solid #00f0ff;
  border-radius: 8px;
  background: rgba(0,240,255,0.06);
  text-shadow: 0 0 10px rgba(0,240,255,0.5);
}

.btn-small {
  padding: 6px 16px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid #444;
  border-radius: 4px;
  background: transparent;
  color: #aaa;
  cursor: pointer;
  margin-left: 12px;
  transition: all 0.2s;
}
.btn-small:hover { border-color: #00f0ff; color: #00f0ff; }

.error { color: #ff4d6d; margin-top: 18px; font-size: 14px; }

.hint { margin-top: 36px; color: #444; font-size: 13px; letter-spacing: 2px; }

/* ── Game Screen ── */
#game-screen { position: relative; }

#hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: linear-gradient(180deg, rgba(20, 28, 60, 0.9), rgba(8, 10, 28, 0.9));
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-bottom: 0;
  border-radius: 12px 12px 0 0;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 2px;
  min-width: 600px;
}

.score-cyan { color: #00f0ff; text-shadow: 0 0 10px rgba(0, 240, 255, 0.7); }
.score-magenta { color: #e040fb; text-shadow: 0 0 10px rgba(224, 64, 251, 0.7); }
#round-info { color: #666; font-size: 14px; }

canvas {
  display: block;
  border-radius: 0 0 12px 12px;
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-top: none;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6), 0 0 50px rgba(0, 240, 255, 0.1);
  touch-action: none;
}

#game-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(5, 6, 18, 0.72);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 12px;
  z-index: 10;
}
#game-overlay.hidden { display: none; }
#game-overlay h2 { font-size: 42px; margin-bottom: 10px; }
#game-overlay p { color: #888; font-size: 18px; }

#controls-hint { text-align: center; color: #444; font-size: 12px; margin-top: 10px; letter-spacing: 1px; }

.hidden { display: none !important; }

@media (max-width: 640px) {
  #lobby h1 { font-size: 48px; letter-spacing: 12px; }
  #hud { min-width: auto; font-size: 14px; padding: 8px 12px; }
  canvas { max-width: 100vw; height: auto; }
  .btn { padding: 12px 32px; font-size: 16px; }
}

#hud {
  width: min(600px, 100vw, max(200px, calc(100vh - var(--gp-header-h, 80px) - 58px)));
  width: min(600px, 100vw, max(200px, calc(100dvh - var(--gp-header-h, 80px) - 58px)));
  min-width: 0;
}

canvas {
  width: min(600px, 100vw, max(200px, calc(100vh - var(--gp-header-h, 80px) - 58px)));
  width: min(600px, 100vw, max(200px, calc(100dvh - var(--gp-header-h, 80px) - 58px)));
  height: auto;
}

@media (max-width: 420px) {
  #lobby { padding: 24px 12px; }
}

.how-to { max-width: 340px; text-align: left; margin: 36px auto 0; padding: 14px 18px; background: rgba(255,255,255,0.04); border-radius: 8px; font-size: 13px; line-height: 1.7; color: #aaa; }
.how-to-title { font-size: 11px; font-weight: 700; letter-spacing: 2px; color: #666; margin-bottom: 8px; text-transform: uppercase; }

[data-theme="light"] html,
[data-theme="light"] body { background: var(--gp-page-grad) fixed; color: var(--gp-ink); }
[data-theme="light"] .btn-cyan, [data-theme="light"] #room-code, [data-theme="light"] .score-cyan { color: #0a84b8; }
[data-theme="light"] #join-code { background: var(--gp-surface); color: var(--gp-ink); border-color: var(--gp-line); }
[data-theme="light"] #lobby-status p, [data-theme="light"] #game-overlay p { color: var(--gp-ink-2); }
[data-theme="light"] .btn-small { color: var(--gp-ink-2); }
[data-theme="light"] .btn-small:hover { color: #0a84b8; }
[data-theme="light"] #hud { background: var(--gp-surface); color: var(--gp-ink); box-shadow: inset 0 0 0 1px var(--gp-line), var(--gp-shadow); }
[data-theme="light"] #game-overlay { background: var(--gp-overlay); color: var(--gp-ink); }
[data-theme="light"] #lobby h1 { background: linear-gradient(90deg, #0891b2, #c026d3); -webkit-background-clip: text; background-clip: text; }
[data-theme="light"] #overlay-title { filter: brightness(0.72) saturate(1.3); }
[data-theme="light"] .how-to { background: rgba(31, 27, 69, 0.05); color: var(--gp-ink-2); }
[data-theme="light"] .how-to-title { color: var(--gp-ink-3); }

.btn { border-radius: 999px; font-weight: 800; }
.btn-cyan { color: #b9fbff; border-color: #00f0ff; background: rgba(0, 240, 255, 0.08); box-shadow: 0 0 18px rgba(0, 240, 255, 0.35), inset 0 0 12px rgba(0, 240, 255, 0.2); text-shadow: 0 0 8px rgba(0, 240, 255, 0.8); }
.btn-ghost { color: #c8cbe0; border-color: rgba(255, 255, 255, 0.25); background: rgba(255, 255, 255, 0.05); }
.btn-ghost:hover { color: #fff; background: rgba(255, 255, 255, 0.1); }
#match-end-btns { display: flex; gap: 12px; margin-top: 16px; justify-content: center; }
#match-end-btns .btn { padding: 10px 28px; font-size: 15px; }
#latency-display { font-size: 12px; color: #888; margin-left: 8px; }
#latency-display.lat-good { color: #00e676; }
#latency-display.lat-ok { color: #ffd700; }
#latency-display.lat-bad { color: #ff4d6d; }
[data-theme="light"] .btn-cyan { color: #0a6e8a; text-shadow: none; background: rgba(8, 145, 178, 0.08); }
[data-theme="light"] .btn-ghost { color: var(--gp-ink-2); background: var(--gp-surface); border-color: var(--gp-line); }
.gp-btn-music.off { opacity: .4; }