/* ── Design tokens ── */
:root {
  --bg: #06080d;
  --surface: rgba(15, 18, 30, 0.82);
  --surface-solid: #111525;
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 255, 255, 0.22);
  --text: #eef0f4;
  --text-muted: rgba(238, 240, 244, 0.45);
  --accent: #7c5cfc;
  --accent-glow: rgba(124, 92, 252, 0.3);
  --danger: #f87171;
  --radius: 14px;
  --radius-sm: 9px;
  --font: "Inter", -apple-system, "Segoe UI", sans-serif;
  --transition: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ── Canvas ── */
#world {
  position: fixed; inset: 0;
  width: 100vw; height: 100vh;
  display: block;
  touch-action: none;
}

/* ═══════════════════════════════
   Danmaku area
   ═══════════════════════════════ */
.danmaku-area {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 180px;
  overflow: hidden;
  z-index: 15;
  pointer-events: none;
}

.danmaku-item {
  position: absolute;
  white-space: nowrap;
  font-size: 18px;
  font-weight: 700;
  font-family: var(--font);
  color: rgba(255, 255, 255, 0.85);
  text-shadow: 0 0 6px rgba(124, 92, 252, 0.5), 0 1px 3px rgba(0,0,0,0.6);
  padding: 4px 14px;
  border-radius: 20px;
  background: rgba(124, 92, 252, 0.12);
  border: 1px solid rgba(124, 92, 252, 0.2);
  backdrop-filter: blur(6px);
  cursor: pointer;
  pointer-events: auto;
  user-select: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  will-change: transform;
  animation: danmakuScroll linear forwards;
}

.danmaku-item:hover {
  transform: scale(1.08);
  box-shadow: 0 0 16px rgba(124, 92, 252, 0.5);
  background: rgba(124, 92, 252, 0.25);
}

.danmaku-item:active {
  transform: scale(0.95);
}

@keyframes danmakuScroll {
  from { transform: translateX(100vw); }
  to   { transform: translateX(-100%); }
}

/* ── Danmaku source picker ── */
.danmaku-picker {
  position: fixed;
  top: 128px;
  right: 16px;
  z-index: 25;
}

.danmaku-picker-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  backdrop-filter: blur(20px);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}
.danmaku-picker-btn:hover {
  color: var(--text);
  background: rgba(255,255,255,0.08);
  border-color: var(--border-focus);
}
.danmaku-picker-btn .chevron {
  flex-shrink: 0;
  transition: transform var(--transition);
}
.danmaku-picker-btn.open .chevron {
  transform: rotate(180deg);
}

.danmaku-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 220px;
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-solid);
  backdrop-filter: blur(28px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
  z-index: 30;
  animation: dropIn 0.18s ease;
  padding: 4px;
}
.danmaku-dropdown.hidden { display: none; }

.danmaku-option {
  padding: 8px 12px;
  border-radius: 7px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.danmaku-option:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}
.danmaku-option.active {
  background: rgba(124, 92, 252, 0.16);
  color: var(--accent);
  font-weight: 600;
}
.danmaku-option.active::after {
  content: '✓';
  float: right;
  font-weight: 700;
  color: var(--accent);
}

.danmaku-select-all {
  padding: 8px 12px;
  border-radius: 7px;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  border-top: 1px solid var(--border);
  margin-top: 2px;
  text-align: center;
  font-weight: 600;
}
.danmaku-select-all:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

/* ── TTS toggle button ── */
.tts-btn {
  gap: 0 !important;
  width: 32px;
  padding: 0 !important;
  justify-content: center;
  flex-shrink: 0;
}
.tts-btn.active {
  background: rgba(52, 211, 153, 0.15);
  border-color: rgba(52, 211, 153, 0.35);
  color: #34d399;
}
.tts-btn:not(.active) {
  color: var(--text-muted);
  opacity: 0.6;
}

.danmaku-toggle-btn,
.auto-drop-btn {
  gap: 0 !important;
  width: 32px;
  padding: 0 !important;
  justify-content: center;
  flex-shrink: 0;
}
.danmaku-toggle-btn.active {
  background: rgba(124, 92, 252, 0.15);
  border-color: rgba(124, 92, 252, 0.35);
  color: #7c5cfc;
}
.danmaku-toggle-btn:not(.active) {
  color: var(--text-muted);
  opacity: 0.6;
}
.auto-drop-btn.active {
  background: rgba(250, 204, 21, 0.15);
  border-color: rgba(250, 204, 21, 0.35);
  color: #facc15;
}
.auto-drop-btn:not(.active) {
  color: var(--text-muted);
  opacity: 0.6;
}

/* ═══════════════════════════════
   Top bar
   ═══════════════════════════════ */
.top-bar {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: min(720px, calc(100vw - 24px));
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 20;
}

/* ── Input row ── */
.input-row {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 4px 4px 0;
  backdrop-filter: blur(28px) saturate(1.4);
  box-shadow: 0 6px 28px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(255,255,255,0.03);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.input-row:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 6px 28px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(255,255,255,0.05), 0 0 20px var(--accent-glow);
}
.input-row input[type="text"] {
  flex: 1; min-width: 0;
  height: 44px; padding: 0 16px;
  border: none; outline: none;
  background: transparent;
  color: var(--text);
  font-size: 16px; font-weight: 500;
  font-family: var(--font);
}
.input-row input[type="text"]::placeholder { color: var(--text-muted); font-weight: 400; }

/* ── Controls row ── */
.controls-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* Generic small control button */
.ctrl-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 5px;
  height: 32px; padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  backdrop-filter: blur(20px);
  color: var(--text-muted);
  font-size: 12px; font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
}
.ctrl-btn:hover {
  color: var(--text);
  background: rgba(255,255,255,0.08);
  border-color: var(--border-focus);
}

.ctrl-label {
  font-size: 11px; font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.ctrl-value {
  font-size: 11px; font-weight: 700;
  color: var(--text-muted);
  min-width: 24px; text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Slider group */
.slider-group {
  display: flex; align-items: center; gap: 6px;
  height: 32px; padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  backdrop-filter: blur(20px);
}

/* ── Drop button ── */
.btn-drop {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border: none; border-radius: 11px;
  background: var(--accent); color: #fff;
  cursor: pointer; flex-shrink: 0;
  transition: background var(--transition), transform 0.1s ease;
}
.btn-drop:hover { background: #6a4ae0; }
.btn-drop:active { transform: scale(0.92); }

/* ── Mic button ── */
.btn-mic {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid var(--border); border-radius: 11px;
  background: var(--surface); color: var(--text-muted);
  cursor: pointer; flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform 0.1s ease;
}
.btn-mic:hover { background: rgba(239, 68, 68, 0.1); border-color: rgba(239, 68, 68, 0.4); color: #ef4444; }
.btn-mic:active { transform: scale(0.92); }
.btn-mic.active {
  background: rgba(239, 68, 68, 0.18);
  border-color: rgba(239, 68, 68, 0.5);
  color: #ef4444;
  animation: micPulse 1.2s ease-in-out infinite;
}
@keyframes micPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
}

/* ═══════════════════════════════
   Font picker dropdown
   ═══════════════════════════════ */
.font-picker-wrap { position: relative; }

.font-btn {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.font-btn .chevron {
  flex-shrink: 0;
  transition: transform var(--transition);
}
.font-btn.open .chevron { transform: rotate(180deg); }

.font-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  width: 280px;
  max-height: 340px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface-solid);
  backdrop-filter: blur(28px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 30;
  animation: dropIn 0.18s ease;
}
.font-dropdown.hidden { display: none; }

@keyframes dropIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.font-dropdown input[type="text"] {
  height: 36px; padding: 0 12px;
  border: none; border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--text); font-size: 13px;
  font-family: var(--font);
  outline: none;
}
.font-dropdown input[type="text"]::placeholder { color: var(--text-muted); }

.font-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.font-list::-webkit-scrollbar { width: 5px; }
.font-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 3px; }

.font-item {
  padding: 7px 10px;
  border-radius: 7px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.font-item:hover { background: rgba(255,255,255,0.06); color: var(--text); }
.font-item.active { background: rgba(124, 92, 252, 0.16); color: var(--accent); font-weight: 600; }
.font-item .font-preview {
  display: inline; pointer-events: none;
}
.font-category {
  padding: 8px 10px 4px;
  font-size: 10px; font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.25);
  user-select: none;
}

/* ── Range slider ── */
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 80px; height: 3px;
  border-radius: 2px;
  background: rgba(255,255,255,0.1);
  outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid rgba(255,255,255,0.12);
  box-shadow: 0 0 6px var(--accent-glow);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid rgba(255,255,255,0.12);
  cursor: pointer;
}

/* ── Settings drawer ── */
.settings-drawer {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  backdrop-filter: blur(24px) saturate(1.4);
  box-shadow: 0 8px 32px rgba(0,0,0,0.45);
  display: flex; flex-direction: column; gap: 8px;
  animation: drawerIn 0.2s ease;
}
.settings-drawer.hidden { display: none; }
@keyframes drawerIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.setting-row {
  display: flex; align-items: center; gap: 8px;
}
.setting-label {
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-muted); width: 60px; flex-shrink: 0;
}
.font-url-input {
  flex: 1; min-width: 0; height: 28px; padding: 0 10px;
  border: 1px solid var(--border); border-radius: 7px;
  background: rgba(255,255,255,0.04);
  color: var(--text); font-size: 12px; font-family: var(--font);
  outline: none;
}
.font-url-input:focus { border-color: var(--border-focus); }

.btn-sm {
  display: inline-flex; align-items: center; justify-content: center;
  height: 26px; padding: 0 9px;
  border: 1px solid var(--border); border-radius: 6px;
  background: rgba(255,255,255,0.05);
  color: var(--text-muted);
  font-size: 11px; font-weight: 600; font-family: var(--font);
  cursor: pointer; white-space: nowrap; flex-shrink: 0;
  transition: all var(--transition);
}
.btn-sm:hover {
  background: rgba(255,255,255,0.1); color: var(--text);
  border-color: var(--border-focus);
}
.btn-file input { display: none; }

/* ── Status ── */
.status-bar {
  font-size: 11px; font-weight: 500;
  color: var(--text-muted);
  text-align: center;
  max-width: 100%;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  padding: 0 8px; min-height: 14px;
  transition: color var(--transition);
}
.status-bar.error { color: var(--danger); }

/* ── Snake mode ── */
.snake-toggle.active {
  background: rgba(124, 92, 252, 0.18);
  color: var(--accent);
  border-color: var(--accent);
}
.snake-score {
  display: inline-flex; align-items: center;
  gap: 4px;
  height: 32px; padding: 0 8px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  background: var(--surface);
  backdrop-filter: blur(20px);
  font-size: 11px; font-weight: 700;
  font-family: var(--font);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  white-space: nowrap;
  animation: dropIn 0.18s ease;
  max-width: 320px;
  overflow-x: auto;
  overflow-y: hidden;
  flex-wrap: nowrap;
}
.snake-score span { white-space: nowrap; }
.snake-score .ss-green { color: #34d399; }
.snake-score .ss-orange { color: #fb923c; }
.snake-score .ss-vs { color: var(--text-muted); font-size: 9px; font-weight: 600; }
.snake-score.hidden { display: none; }

/* ── Snake Leaderboard ── */
.snake-leaderboard {
  position: fixed;
  top: 52px;
  left: 0;
  z-index: 200;
  background: rgba(10, 12, 20, 0.82);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  padding: 8px 10px;
  font-family: var(--font);
  font-size: 11px;
  color: var(--text-primary);
  min-width: 180px;
  max-width: 320px;
  max-height: 50vh;
  overflow-y: auto;
  pointer-events: auto;
  user-select: none;
}
.snake-leaderboard.hidden { display: none; }
.snake-lb-title {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 4px;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  cursor: grab;
}
.snake-lb-title:active { cursor: grabbing; }
.snake-lb-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  line-height: 1.35;
}
.snake-lb-row:last-child { border-bottom: none; }
.snake-lb-rank {
  font-weight: 800;
  font-size: 12px;
  min-width: 16px;
  text-align: center;
}
.snake-lb-info {
  flex: 1;
  min-width: 0;
}
.snake-lb-stats {
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
}
.snake-lb-text {
  font-size: 10px;
  color: rgba(255,255,255,0.55);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
  direction: ltr;
}

.snake-count-group.hidden { display: none; }

.btn-tiny {
  height: 24px; width: 24px;
  padding: 0;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.12);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition);
}
.btn-tiny:hover { background: rgba(124, 92, 252, 0.2); }

/* ── Matrix rain button ── */
.matrix-btn.active {
  background: rgba(0, 255, 65, 0.15);
  border-color: rgba(0, 255, 65, 0.4);
  color: #00ff41;
  text-shadow: 0 0 8px rgba(0, 255, 65, 0.6);
}
.matrix-btn.active:hover {
  background: rgba(0, 255, 65, 0.25);
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .top-bar { top: 8px; width: calc(100vw - 12px); }
  .input-row input[type="text"] { font-size: 15px; height: 40px; }
  .controls-row { gap: 4px; }
  .font-dropdown { width: min(280px, calc(100vw - 32px)); }
  input[type="range"] { width: 60px; }
}