:root {
  --bg: #05030c;
  --fg: #eef1ff;
  --muted: #8b90b3;
  --accent: #33ccff;
  --accent2: #b04cff;
  --panel: rgba(12, 12, 28, 0.62);
  --line: rgba(140, 160, 255, 0.18);
  --hot: #ff3355;
  --gold: #ffd23a;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  color-scheme: dark;
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--fg); overflow: hidden;
  font-family: 'Rajdhani', system-ui, sans-serif; user-select: none; -webkit-user-select: none; touch-action: none; }
canvas#gl { position: fixed; inset: 0; width: 100%; height: 100%; display: block; }
.hidden { display: none !important; }
.screen { position: fixed; inset: 0; display: flex; align-items: center; justify-content: center; z-index: 10; }
.screen.dim { background: radial-gradient(ellipse at center, rgba(5, 3, 15, 0.55), rgba(5, 3, 15, 0.88)); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }

/* ---------- menu ---------- */
#menu { align-items: stretch; justify-content: stretch; overflow-y: auto; touch-action: pan-y;
  background: linear-gradient(90deg, rgba(5,3,12,0.92) 0%, rgba(5,3,12,0.7) 45%, rgba(5,3,12,0.05) 75%); }
.menu-inner { width: 100%; max-width: 1180px; padding: calc(28px + var(--safe-t)) 32px calc(28px + var(--safe-b)); display: flex; flex-direction: column; gap: 22px; }
.brand { padding-top: 4px; }
.logo { font-family: 'Orbitron', sans-serif; font-weight: 900; font-size: clamp(38px, 7vw, 84px); letter-spacing: 0.06em; margin: 0; line-height: 1;
  background: linear-gradient(100deg, #fff 0%, #9fe8ff 40%, #b77bff 75%, #ff5ea8 100%); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 18px rgba(80, 180, 255, 0.55)) drop-shadow(0 0 40px rgba(170, 80, 255, 0.35)); }
.logo span { font-weight: 500; }
.tag { margin: 8px 0 0; color: var(--muted); font-size: 18px; letter-spacing: 0.08em; text-transform: uppercase; }
.menu-cols { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr); gap: 20px; max-width: 900px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 18px; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.06); }
.panel h2 { font-family: 'Orbitron', sans-serif; font-size: 13px; letter-spacing: 0.25em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; font-weight: 700; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.panel-head h2 { margin: 0; }
.song-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; max-height: min(52vh, 520px); overflow-y: auto; padding-right: 4px; touch-action: pan-y; }
.song-list::-webkit-scrollbar { width: 6px; } .song-list::-webkit-scrollbar-thumb { background: rgba(140,160,255,0.3); border-radius: 3px; }
.song { display: grid; grid-template-columns: 38px minmax(0, 1fr) auto; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px; cursor: pointer;
  background: rgba(255, 255, 255, 0.03); border: 1px solid transparent; transition: background 0.15s, border-color 0.15s, transform 0.15s; }
.song:hover, .song:focus-visible { background: rgba(80, 140, 255, 0.12); border-color: rgba(120, 180, 255, 0.35); transform: translateX(3px); outline: none; }
.song .num { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; font-family: 'Orbitron'; font-size: 13px; font-weight: 700;
  background: linear-gradient(135deg, rgba(51, 204, 255, 0.25), rgba(176, 76, 255, 0.25)); color: #cfe9ff; }
.song .meta { min-width: 0; }
.song .title { font-size: 18px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.song .artist { font-size: 14px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.song .best { font-family: 'Orbitron'; font-size: 12px; color: var(--gold); text-align: right; white-space: nowrap; }
.song .best small { display: block; color: var(--muted); font-family: 'Rajdhani'; font-size: 11px; letter-spacing: 0.1em; }
.drop-hint { margin: 12px 0 0; color: var(--muted); font-size: 14px; text-align: center; }
.opt { margin-bottom: 14px; }
.opt > span { display: block; font-size: 13px; color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.03); color: var(--fg); font: 600 14px 'Rajdhani'; cursor: pointer; }
.chip.on { background: linear-gradient(135deg, rgba(51, 204, 255, 0.3), rgba(176, 76, 255, 0.3)); border-color: rgba(140, 200, 255, 0.7); box-shadow: 0 0 14px rgba(80, 180, 255, 0.35); }
.controls-help { font-size: 15px; color: #c9cdf0; display: flex; flex-direction: column; gap: 6px; margin: 16px 0 10px; }
kbd { display: inline-block; min-width: 24px; padding: 1px 6px; margin-right: 3px; border-radius: 6px; border: 1px solid rgba(255,255,255,0.25); background: rgba(255,255,255,0.06); font: 600 12px 'Orbitron'; text-align: center; }
.touch-only { display: none; }
.mini { color: var(--muted); font-size: 14px; line-height: 1.4; margin: 6px 0 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 20px; border-radius: 12px; cursor: pointer; border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05); color: var(--fg); font: 700 16px 'Rajdhani'; letter-spacing: 0.08em; text-transform: uppercase; transition: transform 0.12s, box-shadow 0.12s; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(80, 160, 255, 0.25); }
.btn-primary { background: linear-gradient(135deg, #1fb6ff, #8a3cff); border-color: transparent; box-shadow: 0 6px 24px rgba(80, 120, 255, 0.4); }
.btn-primary span { white-space: nowrap; }

/* ---------- loading ---------- */
#loading { background: radial-gradient(ellipse at center, rgba(5,3,15,0.4), rgba(5,3,15,0.85)); }
.load-box { text-align: center; width: min(420px, 86vw); }
.load-title { font-family: 'Orbitron'; font-size: 20px; font-weight: 700; margin: 22px 0 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.load-stage { color: var(--muted); letter-spacing: 0.2em; text-transform: uppercase; font-size: 13px; }
.bar { height: 4px; border-radius: 2px; background: rgba(255,255,255,0.1); margin-top: 16px; overflow: hidden; }
.bar > div { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent2)); box-shadow: 0 0 12px var(--accent); transition: width 0.2s; }
.spinner { position: relative; width: 70px; height: 70px; margin: 0 auto; }
.spinner div { position: absolute; inset: 0; border-radius: 50%; border: 2px solid transparent; border-top-color: var(--accent); animation: spin 1.1s linear infinite; }
.spinner div:nth-child(2) { inset: 9px; border-top-color: var(--accent2); animation-duration: 0.8s; animation-direction: reverse; }
.spinner div:nth-child(3) { inset: 18px; border-top-color: #ff5ea8; animation-duration: 0.6s; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- HUD ---------- */
#hud { position: fixed; inset: 0; pointer-events: none; z-index: 5; }
.hud-top { position: absolute; top: calc(14px + var(--safe-t)); left: 18px; right: 18px; display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.hud-score { min-width: 160px; }
.score { font-family: 'Orbitron'; font-weight: 900; font-size: clamp(24px, 4.2vw, 42px); letter-spacing: 0.04em; text-shadow: 0 0 18px rgba(120, 200, 255, 0.6); font-variant-numeric: tabular-nums; }
.mult-row { display: flex; align-items: baseline; gap: 10px; margin-top: 2px; }
.mult { font-family: 'Orbitron'; font-weight: 700; font-size: 22px; color: var(--hud-color, var(--accent)); text-shadow: 0 0 12px currentColor; transition: transform 0.1s; display: inline-block; }
.combo { font-size: 16px; color: #c9d2ff; letter-spacing: 0.08em; }
.hud-progress { flex: 1; max-width: 520px; text-align: center; }
.song-name { font-size: 15px; letter-spacing: 0.14em; text-transform: uppercase; color: #cfd6ff; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 6px; text-shadow: 0 0 10px rgba(0,0,0,0.8); }
.prog { position: relative; height: 22px; border-radius: 6px; overflow: hidden; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); }
.prog canvas { width: 100%; height: 100%; display: block; }
.prog-head { position: absolute; top: 0; bottom: 0; width: 2px; background: #fff; box-shadow: 0 0 10px #fff, 0 0 20px var(--accent); left: 0; }
.hud-meta { display: flex; justify-content: center; gap: 16px; margin-top: 6px; font-size: 13px; color: var(--muted); letter-spacing: 0.15em; text-transform: uppercase; }
.hud-meta span:first-child { color: var(--hud-color, #fff); }
.inst-strip { display: flex; justify-content: center; gap: 6px; margin-top: 8px; }
.inst { display: flex; flex-direction: column; align-items: center; gap: 3px; width: 46px; opacity: 0.55; transition: opacity 0.25s, transform 0.25s; }
.inst.dom { opacity: 1; transform: scale(1.12); }
.inst .m { width: 100%; height: 4px; border-radius: 2px; background: rgba(255,255,255,0.08); overflow: hidden; }
.inst .m i { display: block; height: 100%; width: 0%; background: var(--c); box-shadow: 0 0 8px var(--c); }
.inst b { font: 700 10px 'Orbitron'; letter-spacing: 0.12em; color: var(--c); text-shadow: 0 0 8px var(--c); }
.inst.dom b::before { content: '▸'; margin-right: 2px; }
.icon-btn { pointer-events: auto; width: 46px; height: 46px; border-radius: 14px; border: 1px solid var(--line); background: rgba(10, 10, 25, 0.5); color: #fff; font-size: 14px; cursor: pointer; backdrop-filter: blur(8px); }
.events { position: absolute; left: 0; right: 0; top: 30%; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.ev { font-family: 'Orbitron'; font-weight: 900; font-size: clamp(22px, 4vw, 40px); letter-spacing: 0.12em; animation: pop 1s ease-out forwards; text-shadow: 0 0 20px currentColor; }
.ev.bad { color: var(--hot); } .ev.drop { color: #fff; font-size: clamp(36px, 8vw, 84px); text-shadow: 0 0 30px var(--hud-color), 0 0 60px var(--hud-color); }
.ev.od { color: var(--gold); } .ev.mega { color: #fff; font-size: clamp(18px, 3vw, 28px); } .ev.chain { color: var(--hud-color, var(--accent)); }
@keyframes pop { 0% { opacity: 0; transform: scale(1.6); } 12% { opacity: 1; transform: scale(1); } 75% { opacity: 1; } 100% { opacity: 0; transform: translateY(-30px) scale(0.95); } }
.countdown { position: absolute; inset: 0; display: grid; place-items: center; font-family: 'Orbitron'; font-weight: 900; font-size: clamp(80px, 18vw, 200px); color: #fff;
  text-shadow: 0 0 40px var(--hud-color, var(--accent)), 0 0 80px var(--hud-color, var(--accent)); pointer-events: none; }
.countdown .n { animation: cd 1s ease-out forwards; }
@keyframes cd { 0% { opacity: 0; transform: scale(2.2); } 15% { opacity: 1; transform: scale(1); } 80% { opacity: 1; } 100% { opacity: 0; transform: scale(0.7); } }
.hud-bottom { position: absolute; bottom: calc(20px + var(--safe-b)); left: 0; right: 0; display: flex; justify-content: center; }
.od { width: min(340px, 70vw); text-align: center; }
.od-label { font-family: 'Orbitron'; font-size: 12px; letter-spacing: 0.35em; color: var(--muted); margin-bottom: 6px; }
.od-label.ready { color: var(--gold); text-shadow: 0 0 12px var(--gold); animation: blink 0.5s infinite alternate; }
@keyframes blink { to { opacity: 0.45; } }
.od-bar { height: 8px; border-radius: 4px; background: rgba(255,255,255,0.08); overflow: hidden; border: 1px solid rgba(255,255,255,0.1); }
.od-bar > div { height: 100%; width: 0%; background: linear-gradient(90deg, #ff9d2e, var(--gold), #fff6b0); box-shadow: 0 0 14px var(--gold); }
.touch-hint { position: absolute; bottom: calc(70px + var(--safe-b)); left: 0; right: 0; text-align: center; font-family: 'Orbitron'; font-size: 13px; letter-spacing: 0.25em; color: rgba(255,255,255,0.7); display: none; transition: opacity 1s; }

/* ---------- modals ---------- */
.modal { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 28px; min-width: min(340px, 88vw); display: flex; flex-direction: column; gap: 10px; text-align: center;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6); backdrop-filter: blur(16px); }
.modal h2 { font-family: 'Orbitron'; letter-spacing: 0.25em; text-transform: uppercase; margin: 0 0 10px; }
.results { min-width: min(440px, 92vw); }
.res-song { color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; font-size: 14px; }
.grade { font-family: 'Orbitron'; font-weight: 900; font-size: 110px; line-height: 1; margin: 6px 0;
  background: linear-gradient(160deg, #fff, var(--hud-color, #33ccff)); -webkit-background-clip: text; background-clip: text; color: transparent; filter: drop-shadow(0 0 24px var(--hud-color, #33ccff)); }
.res-score { font-family: 'Orbitron'; font-size: 34px; font-weight: 700; }
.res-best { color: var(--gold); font-size: 15px; letter-spacing: 0.1em; min-height: 20px; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 10px 0 8px; text-align: left; }
.stats div { background: rgba(255,255,255,0.04); border-radius: 10px; padding: 8px 12px; font-size: 14px; color: var(--muted); }
.stats b { display: block; font-family: 'Orbitron'; color: var(--fg); font-size: 18px; }
.row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.drop-zone { position: fixed; inset: 0; z-index: 50; display: grid; place-items: center; background: rgba(20, 40, 120, 0.35); border: 3px dashed rgba(140, 200, 255, 0.8); backdrop-filter: blur(4px); }
.drop-zone div { font-family: 'Orbitron'; font-size: 36px; letter-spacing: 0.2em; }
.toast { position: fixed; bottom: calc(24px + var(--safe-b)); left: 50%; transform: translateX(-50%); z-index: 60; background: rgba(40, 10, 20, 0.9); border: 1px solid var(--hot); padding: 12px 18px; border-radius: 12px; max-width: 90vw; }

@media (max-width: 760px) {
  #menu { background: linear-gradient(180deg, rgba(5,3,12,0.35) 0%, rgba(5,3,12,0.85) 30%, rgba(5,3,12,0.95) 100%); }
  .menu-inner { padding: calc(18px + var(--safe-t)) 16px calc(18px + var(--safe-b)); gap: 14px; }
  .brand { padding-top: 28vh; }
  .menu-cols { grid-template-columns: 1fr; }
  .song-list { max-height: none; }
  .hud-top { left: 12px; right: 12px; gap: 10px; }
  .hud-score { min-width: 0; }
  .hud-meta span:nth-child(n+2) { display: none; }
  .inst { width: 38px; } .inst b { font-size: 8px; }
  .song-name { font-size: 12px; }
  .mult { font-size: 18px; }
}
@media (pointer: coarse) { .touch-only { display: block; } .touch-hint { display: block; } }

/* ---------- fit any frame (full screen or embedded on a website): never show a scrollbar ---------- */
html, body { overscroll-behavior: none; }
#menu, .song-list, .side-panel { scrollbar-width: none; overscroll-behavior: contain; }
#menu::-webkit-scrollbar, .song-list::-webkit-scrollbar, .side-panel::-webkit-scrollbar { display: none; }
@media (min-width: 761px) {
  #menu { overflow: hidden; }
  .menu-inner { height: 100%; min-height: 0; }
  .menu-cols { flex: 1; min-height: 0; grid-template-rows: minmax(0, 1fr); align-items: start; }
  .panel { max-height: 100%; min-height: 0; }
  .songs-panel { display: flex; flex-direction: column; }
  .song-list { flex: 1; min-height: 0; max-height: none; padding-bottom: 22px;
    -webkit-mask-image: linear-gradient(to bottom, #000 calc(100% - 26px), transparent); mask-image: linear-gradient(to bottom, #000 calc(100% - 26px), transparent); }
  .side-panel { overflow-y: auto; }
}
@media (min-width: 761px) and (max-height: 680px) {
  .menu-inner { padding-top: 16px; padding-bottom: 16px; gap: 12px; }
  .logo { font-size: clamp(30px, 5vw, 54px); }
  .tag { font-size: 14px; margin-top: 4px; }
  .panel { padding: 12px 14px; }
  .song { padding: 7px 10px; }
  .song .num { width: 32px; height: 32px; }
  .opt { margin-bottom: 10px; }
  .controls-help { margin: 8px 0 6px; font-size: 14px; }
}