:root {
  --bg: #0d0b1a;
  --panel: rgba(20, 12, 30, 0.82);
  --panel-strong: rgba(12, 8, 22, 0.94);
  --orange: #ff7a30;
  --sunset: #ff4e50;
  --purple: #8b3dff;
  --gold: #ffd76d;
  --cyan: #55f0ff;
  --mint: #45ffb4;
  --pink: #ff3df2;
  --danger: #ff3864;
  --text: #f0e8ff;
  --muted: #b0a0c8;
  --line: rgba(255, 122, 48, 0.28);
  --shadow-orange: 0 0 28px rgba(255, 122, 48, 0.35);
  --shadow-gold: 0 0 28px rgba(255, 215, 109, 0.4);
  --font: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  touch-action: none;
  user-select: none;
  font-family: var(--font);
}

button { font: inherit; color: inherit; }

.app {
  position: relative;
  width: 100vw;
  height: 100dvh;
  min-height: 480px;
  overflow: hidden;
  background: linear-gradient(180deg, #1a0a2e 0%, #0d0b1a 100%);
}

#gameCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
}

.ambient {
  position: absolute;
  inset: auto;
  pointer-events: none;
  z-index: 2;
  opacity: 0.35;
}

.ambient-a {
  top: 8%;
  left: 6%;
  width: 30vw;
  height: 1px;
  background: var(--orange);
  box-shadow: 0 0 48px 20px rgba(255, 122, 48, 0.12);
  animation: drift 9s linear infinite;
}

.ambient-b {
  right: 10%;
  bottom: 20%;
  width: 24vw;
  height: 1px;
  background: var(--purple);
  box-shadow: 0 0 40px 16px rgba(139, 61, 255, 0.1);
  animation: drift 11s linear infinite reverse;
}

@keyframes drift {
  from { transform: translateX(-24px); opacity: 0.12; }
  50% { opacity: 0.42; }
  to { transform: translateX(24px); opacity: 0.12; }
}

/* ── HUD ── */
.hud {
  position: absolute;
  top: max(10px, env(safe-area-inset-top));
  left: max(10px, env(safe-area-inset-left));
  right: max(10px, env(safe-area-inset-right));
  z-index: 5;
  display: none;
  gap: 6px;
  pointer-events: none;
}

.state-playing .hud,
.state-paused .hud,
.state-gameOver .hud {
  display: grid;
}

.hud-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.hud-pill,
.player-chip,
.hud-timer span {
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(12, 8, 22, 0.76);
  box-shadow: inset 0 0 20px rgba(255, 122, 48, 0.04), 0 0 18px rgba(0,0,0,0.24);
  backdrop-filter: blur(12px);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
}

.hud-pill span {
  color: var(--muted);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hud-pill strong {
  min-width: 22px;
  text-align: right;
  color: var(--orange);
  text-shadow: var(--shadow-orange);
}

.hud-pill .combo-val {
  color: var(--gold);
  text-shadow: var(--shadow-gold);
}

.player-chip {
  color: var(--mint);
  font-size: 0.8rem;
  pointer-events: auto;
}

.hud-timer {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.hud-timer span {
  color: var(--gold);
  font-size: 0.75rem;
  min-height: 28px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(12, 8, 22, 0.82);
  color: var(--orange);
  box-shadow: var(--shadow-orange);
  cursor: pointer;
  pointer-events: auto;
  transition: transform 150ms ease, border-color 150ms ease, background 150ms ease;
  line-height: 1;
  font-size: 1rem;
}

.icon-btn:active,
.primary-btn:active,
.secondary-btn:active {
  transform: scale(0.96);
}

/* ── Screens ── */
.screens {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.screen {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: max(18px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) max(100px, env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left));
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 240ms ease, transform 240ms ease, visibility 240ms ease;
}

.screen.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.state-playing .screens {
  pointer-events: none;
}

/* ── Loading ── */
#loadingScreen {
  text-align: center;
}

.loading-bar-track {
  width: min(70vw, 300px);
  height: 6px;
  border-radius: 3px;
  background: rgba(255,122,48,0.15);
  margin: 20px auto 0;
  overflow: hidden;
}

.loading-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--orange), var(--gold));
  border-radius: 3px;
  transition: width 160ms ease;
}

.loading-text {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 10px;
}

/* ── Intro / Menu ── */
#introScreen {
  text-align: center;
  background: radial-gradient(circle at center, rgba(255,122,48,0.08), transparent 50%);
}

.brand-mark {
  width: 60px;
  height: 60px;
  margin: 0 auto 12px;
  border: 2px solid rgba(255,122,48,0.5);
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--orange);
  font-weight: 900;
  font-size: 1.4rem;
  box-shadow: 0 0 24px rgba(255,122,48,0.25);
}

h1, h2, p { margin: 0; }

h1 {
  font-size: clamp(2.2rem, 8vw, 5.5rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--orange), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 18px rgba(255,122,48,0.4));
}

h2 {
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  line-height: 1;
  text-shadow: var(--shadow-orange);
}

.tagline {
  max-width: 600px;
  margin: 12px auto 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 0.9rem;
}

.eyebrow {
  color: var(--mint);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}

/* ── Screen panels ── */
.screen-panel {
  width: min(96vw, 660px);
  max-height: calc(100dvh - 32px);
  overflow: auto;
  border: 1px solid rgba(255,122,48,0.22);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(22, 14, 40, 0.9), rgba(12, 8, 22, 0.85));
  box-shadow: 0 0 48px rgba(255,122,48,0.1), 0 0 48px rgba(139,61,255,0.08);
  backdrop-filter: blur(16px);
  padding: clamp(16px, 3.5vw, 30px);
  text-align: center;
}

.wide-panel { width: min(96vw, 880px); }
.small-panel { width: min(94vw, 400px); }

.best-grid,
.result-grid,
.guide-grid {
  display: grid;
  gap: 8px;
  margin: 20px 0;
}

.best-grid { grid-template-columns: repeat(2, 1fr); }

.best-grid div,
.result-grid div,
.guide-grid div {
  min-height: 64px;
  border: 1px solid rgba(255,122,48,0.14);
  border-radius: 8px;
  background: rgba(12, 8, 22, 0.7);
  display: grid;
  align-content: center;
  gap: 5px;
  padding: 10px;
}

.best-grid span,
.result-grid span {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.best-grid strong,
.result-grid strong {
  color: var(--orange);
  font-size: 1.2rem;
}

.menu-actions {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.menu-actions.horizontal {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.primary-btn,
.secondary-btn {
  min-height: 46px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease, background 150ms ease;
}

.primary-btn {
  border: 1px solid rgba(255,122,48,0.7);
  background: linear-gradient(135deg, rgba(255,122,48,0.24), rgba(255,215,109,0.14));
  color: #fff6e8;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-orange);
  padding: 0 18px;
}

.secondary-btn {
  border: 1px solid rgba(139,61,255,0.24);
  background: rgba(12, 8, 22, 0.76);
  color: var(--text);
  padding: 0 14px;
}

.primary-btn:hover,
.secondary-btn:hover,
.icon-btn:hover {
  border-color: rgba(255,122,48,0.8);
  box-shadow: 0 0 24px rgba(255,122,48,0.2);
}

.result-grid { grid-template-columns: repeat(3, 1fr); }

.guide-grid { grid-template-columns: 1fr 1fr; text-align: left; }

.guide-grid strong { color: var(--orange); }

.guide-grid span { color: var(--muted); line-height: 1.4; font-size: 0.85rem; }

.submission-status {
  color: var(--gold);
  margin: 4px 0 10px;
  font-size: 0.85rem;
}

/* ── Pop animation ── */
.pop {
  animation: hudPop 260ms ease;
}

@keyframes hudPop {
  0% { transform: scale(1); }
  45% { transform: scale(1.18); }
  100% { transform: scale(1); }
}

/* ── Responsive ── */
@media (max-width: 720px) {
  .app { min-height: 520px; }
  .hud { top: max(6px, env(safe-area-inset-top)); left: 6px; right: 6px; }
  .hud-row { gap: 4px; }
  .hud-pill { min-height: 28px; padding: 4px 6px; gap: 4px; }
  .hud-pill span { font-size: 0.55rem; }
  .hud-pill strong, .player-chip, .hud-timer span { font-size: 0.7rem; }
  .icon-btn { width: 32px; height: 32px; font-size: 0.85rem; }
  .screen { padding-bottom: max(130px, env(safe-area-inset-bottom)); }
  .screen-panel { padding: 14px; }
  .best-grid, .result-grid, .guide-grid, .menu-actions.horizontal {
    grid-template-columns: 1fr;
  }
  h1 { font-size: clamp(1.8rem, 7vw, 3.5rem); }
}

@media (min-width: 900px) and (pointer: fine) {
  .mobile-controls { display: none !important; }
}