/* ═══ PSS — Main Styles ═══ */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #12122a;
  --bg-card: #1a1a3e;
  --text-primary: #e8e8f0;
  --text-secondary: #8888aa;
  --accent: #6c5ce7;
  --accent-glow: rgba(108, 92, 231, 0.3);
  --win: #00b894;
  --lose: #e17055;
  --draw: #fdcb6e;
  --danger: #d63031;
  --border: rgba(255,255,255,0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

.screen {
  display: none;
  min-height: 100vh;
  animation: fadeIn 0.3s ease;
}
.screen.active { display: flex; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ── Buttons ───────────────────── */
.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover:not(:disabled) { background: #5a4bd4; transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: #22224a; }
.btn-icon { background: transparent; color: var(--text-secondary); font-size: 1.2rem; padding: 0.5rem; }
.btn-icon:hover { color: var(--text-primary); }
.btn-small { padding: 0.4rem 0.8rem; font-size: 0.85rem; }
.btn-danger:hover { color: var(--danger); }
.btn-back { font-size: 1.4rem; }

input[type="text"], select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  width: 100%;
  transition: border-color var(--transition);
}
input[type="text"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

.screen-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* ── Quality presets ───────────── */
body.quality-low .particle, body.quality-low .glow-effect { display: none; }
body.quality-low * { animation-duration: 0.1s !important; }
body.quality-high .arena { background: radial-gradient(ellipse at center, #1a1a3e 0%, #0a0a1a 70%); }

/* ── Responsive ────────────────── */
@media (max-width: 480px) {
  .container { padding: 1rem; }
  .btn { padding: 0.6rem 1rem; font-size: 0.9rem; }
}