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

:root {
  --bg: #08061a;
  --panel: rgba(255, 255, 255, 0.055);
  --panel-solid: #171331;
  --border: rgba(255, 255, 255, 0.09);
  --text: #f4f1ff;
  --dim: #9a91c9;
  --pink: #ff2d78;
  --cyan: #00e5ff;
  --gold: #ffc93d;
  --teamA: #38b6ff;
  --teamB: #ff5fa2;
  --ok: #3ddc84;
  --glow-pink: 0 0 24px rgba(255, 45, 120, 0.55);
  --glow-cyan: 0 0 24px rgba(0, 229, 255, 0.4);
}

html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  overflow-x: hidden;
  position: relative;
}

/* animated neon background */
body::before, body::after {
  content: "";
  position: fixed;
  width: 60vmax; height: 60vmax;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.32;
  z-index: -1;
  animation: drift 26s ease-in-out infinite alternate;
}
body::before {
  background: radial-gradient(circle, #ff2d78 0%, transparent 60%);
  top: -25vmax; left: -18vmax;
}
body::after {
  background: radial-gradient(circle, #3d2dff 0%, #00e5ff44 55%, transparent 70%);
  bottom: -28vmax; right: -20vmax;
  animation-delay: -13s;
}
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(9vmax, 6vmax) scale(1.25); }
}

.hidden { display: none !important; }

/* ---------- nav ---------- */
#nav {
  display: flex; align-items: center; gap: 6px;
  padding: 12px 18px;
  position: sticky; top: 0; z-index: 10;
  background: rgba(8, 6, 26, 0.75);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
#nav .logo {
  font-weight: 900; letter-spacing: 2px; margin-right: 16px; font-size: 17px;
  background: linear-gradient(90deg, var(--gold), var(--pink) 55%, var(--cyan));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: none;
  animation: shimmer 6s linear infinite;
  background-size: 200% 100%;
}
@keyframes shimmer { to { background-position: 200% 0; } }
#nav button {
  background: none; border: none; color: var(--dim);
  font-size: 15px; font-weight: 700; padding: 9px 16px; border-radius: 999px; cursor: pointer;
  transition: all 0.2s;
}
#nav button:hover { color: var(--text); }
#nav button.active {
  background: linear-gradient(135deg, var(--pink), #b62dff);
  color: #fff; box-shadow: var(--glow-pink);
}

.tab { display: none; padding: 24px 20px 60px; max-width: 1100px; margin: 0 auto; }
.tab.active { display: block; animation: fadein 0.25s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(8px); } }

h1 { font-size: 28px; margin-bottom: 18px; font-weight: 900; letter-spacing: 0.5px; }
h2 { font-size: 15px; margin: 22px 0 10px; color: var(--dim); text-transform: uppercase; letter-spacing: 1.5px; }

button {
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 14px; padding: 10px 18px;
  font-size: 16px; font-weight: 600; cursor: pointer;
  transition: transform 0.12s, box-shadow 0.2s, background 0.2s;
}
button:hover { background: rgba(255, 255, 255, 0.1); }
button:active { transform: scale(0.95); }
button:disabled { opacity: 0.35; cursor: default; }

.big-btn {
  background: linear-gradient(135deg, var(--pink), #ff7a3d);
  border: none; color: #fff; font-size: 22px; font-weight: 900;
  padding: 18px 40px; border-radius: 999px;
  box-shadow: var(--glow-pink);
  letter-spacing: 0.5px;
}
.big-btn:hover { background: linear-gradient(135deg, #ff4d8f, #ff8f55); box-shadow: 0 0 36px rgba(255, 45, 120, 0.8); }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0; align-items: center; }
.btn-row button.selected {
  border-color: var(--gold); color: var(--gold);
  box-shadow: 0 0 16px rgba(255, 201, 61, 0.35);
}

/* ---------- library ---------- */
#search {
  width: 100%; padding: 14px 20px; font-size: 17px;
  border-radius: 999px; border: 1px solid var(--border);
  background: var(--panel); color: var(--text);
  margin-bottom: 8px; outline: none;
  backdrop-filter: blur(10px);
}
#search:focus { border-color: var(--cyan); box-shadow: var(--glow-cyan); }
#search::placeholder { color: var(--dim); }

#song-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 10px; }
.cat-header {
  grid-column: 1 / -1;
  margin: 20px 0 4px; font-size: 13px; font-weight: 800;
  color: var(--gold); text-transform: uppercase; letter-spacing: 2px;
  display: flex; align-items: center; gap: 10px;
}
.cat-header::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--border), transparent); }
.song-row {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; border-radius: 16px; cursor: pointer;
  background: var(--panel); border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  transition: all 0.18s;
}
.song-row:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 45, 120, 0.5);
  box-shadow: 0 6px 24px rgba(255, 45, 120, 0.18);
}
.song-row .num {
  width: 34px; height: 34px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(255,45,120,0.25), rgba(0,229,255,0.18));
  color: var(--text); font-weight: 800; font-size: 13px;
}
.song-row .artist { color: var(--dim); }
.song-row .badges { margin-left: auto; font-size: 14px; }
.empty-note { grid-column: 1 / -1; color: var(--dim); padding: 40px; text-align: center; line-height: 1.7; }

/* ---------- battle ---------- */
#battle-setup { text-align: center; padding-top: 4vh; }
#battle-setup h1 { font-size: 36px; }
.team-inputs { display: flex; align-items: center; gap: 16px; margin: 30px auto; max-width: 700px; }
.team-inputs input {
  flex: 1; min-width: 0; padding: 16px; font-size: 22px; font-weight: 800; text-align: center;
  border: 1px solid var(--border); border-radius: 18px;
  background: var(--panel); color: var(--text); outline: none;
  backdrop-filter: blur(10px);
}
.team-inputs input:first-child { border-bottom: 3px solid var(--teamA); }
.team-inputs input:last-child { border-bottom: 3px solid var(--teamB); }
.vs {
  font-size: 26px; font-weight: 900; font-style: italic;
  background: linear-gradient(180deg, var(--gold), #ff7a3d);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 20px rgba(255, 201, 61, 0.4);
}

#scoreboard {
  display: flex; justify-content: space-between; align-items: stretch; gap: 10px;
  background: var(--panel); border: 1px solid var(--border); backdrop-filter: blur(14px);
  border-radius: 24px; padding: 18px; margin-bottom: 22px;
}
.team { text-align: center; flex: 1; }
.team-name { font-size: 19px; font-weight: 900; letter-spacing: 0.5px; }
.team-a .team-name { color: var(--teamA); text-shadow: 0 0 18px rgba(56, 182, 255, 0.6); }
.team-b .team-name { color: var(--teamB); text-shadow: 0 0 18px rgba(255, 95, 162, 0.6); }
.team-score {
  font-size: 72px; font-weight: 900; line-height: 1.05;
  font-variant-numeric: tabular-nums;
}
.team-a .team-score { color: var(--teamA); }
.team-b .team-score { color: var(--teamB); }
.award-btns { display: flex; gap: 6px; justify-content: center; margin-top: 4px; }
.award-btns button { padding: 6px 13px; font-size: 14px; border-radius: 999px; }
.round-info { align-self: center; text-align: center; min-width: 150px; }
#round-num { font-size: 24px; font-weight: 900; color: var(--gold); text-shadow: 0 0 16px rgba(255, 201, 61, 0.45); }
#round-format { color: var(--dim); font-weight: 600; }

#picked-song {
  margin-top: 20px; text-align: center;
  background: var(--panel); border: 1px solid rgba(255, 201, 61, 0.35);
  border-radius: 20px; padding: 24px;
  box-shadow: 0 0 30px rgba(255, 201, 61, 0.12);
}
.picked-label { color: var(--dim); text-transform: uppercase; letter-spacing: 2px; font-size: 12px; }
#picked-title { font-size: 30px; font-weight: 900; margin: 12px 0 18px; }
#picked-song .btn-row { justify-content: center; }
.battle-footer { margin-top: 30px; justify-content: center; }
.battle-footer button { color: var(--dim); font-size: 14px; }

#battle-winner { text-align: center; padding-top: 8vh; position: relative; }
#battle-winner h1 { font-size: 46px; text-shadow: 0 0 40px rgba(255, 201, 61, 0.5); }
#winner-score { font-size: 32px; margin: 24px 0 36px; color: var(--gold); font-weight: 800; }

.confetti {
  position: fixed; top: -20px; width: 12px; height: 12px; z-index: 200;
  animation: fall linear forwards;
}
@keyframes fall {
  to { transform: translateY(110vh) rotate(720deg); opacity: 0.6; }
}

/* ---------- recordings / demos ---------- */
.rec-row {
  display: flex; align-items: center; gap: 14px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 10px 16px; margin-bottom: 8px;
  backdrop-filter: blur(10px);
}
.rec-row audio { margin-left: auto; height: 36px; max-width: 55%; }

/* ---------- settings ---------- */
.setting-row {
  display: block; margin: 0 0 16px; font-size: 16px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 18px; padding: 18px 20px;
  backdrop-filter: blur(10px);
}
.setting-row p { color: var(--dim); margin: 6px 0 12px; line-height: 1.5; }
.setting-row h2 { margin-top: 0; }
.meter {
  height: 28px; border-radius: 999px; background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  overflow: hidden; margin: 14px 0; max-width: 520px;
}
.meter.small { width: 90px; height: 14px; margin: 0; flex-shrink: 0; }
#mic-level, #live-level {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--ok), var(--gold), var(--pink));
  transition: width 0.05s linear;
  box-shadow: 0 0 14px rgba(61, 220, 132, 0.5);
}
#mic-info { color: var(--dim); }

/* ---------- player ---------- */
#player {
  position: fixed; inset: 0; z-index: 100;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(255, 45, 120, 0.22), transparent),
    radial-gradient(ellipse 70% 45% at 50% 115%, rgba(0, 229, 255, 0.14), transparent),
    var(--bg);
  display: flex; flex-direction: column;
}
#player-top { display: flex; align-items: center; gap: 14px; padding: 14px 20px; }
#player-back { border-radius: 999px; }
#player-song { font-size: 18px; font-weight: 800; flex: 1; text-align: center; }
#player-tools { display: flex; gap: 8px; }
#player-tools button { border-radius: 999px; }
#rec-btn.recording {
  background: linear-gradient(135deg, var(--pink), #c40040); border: none;
  animation: pulse 1s infinite; box-shadow: var(--glow-pink);
}
#hint-btn.on { background: rgba(61, 220, 132, 0.2); border-color: var(--ok); color: var(--ok); }
@keyframes pulse { 50% { opacity: 0.65; } }

#lyrics { flex: 1; overflow: hidden; position: relative; }
#lyrics::before, #lyrics::after {
  content: ""; position: absolute; left: 0; right: 0; height: 90px; z-index: 2; pointer-events: none;
}
#lyrics::before { top: 0; background: linear-gradient(180deg, var(--bg), transparent); }
#lyrics::after { bottom: 0; background: linear-gradient(0deg, var(--bg), transparent); }
#lyrics-inner {
  position: absolute; width: 100%; text-align: center;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  padding-top: 25vh;
}
.lyric-line {
  font-size: 30px; line-height: 1.6; color: var(--dim);
  transition: all 0.25s; cursor: pointer; padding: 5px 24px;
  font-weight: 600;
}
.lyric-line.current {
  color: #fff; font-size: 42px; font-weight: 900;
  text-shadow: 0 0 24px rgba(255, 45, 120, 0.9), 0 0 60px rgba(255, 45, 120, 0.4);
}
.lyric-line.past { opacity: 0.28; }

#player-bottom {
  display: flex; align-items: center; gap: 14px; padding: 16px 22px 24px;
}
.round-btn {
  width: 60px; height: 60px; border-radius: 50%; font-size: 22px;
  background: linear-gradient(135deg, var(--pink), #b62dff);
  border: none; color: #fff; flex-shrink: 0;
  box-shadow: var(--glow-pink);
}
#seek {
  flex: 1; accent-color: var(--pink); height: 6px; cursor: pointer;
}
#time { color: var(--dim); font-variant-numeric: tabular-nums; white-space: nowrap; font-weight: 600; }
#back5, #fwd5 { border-radius: 999px; padding: 8px 14px; font-size: 14px; }

/* ---------- game board (плашки) ---------- */
#game-board {
  display: flex; gap: 12px; overflow-x: auto; padding: 6px 2px 14px;
  align-items: flex-start;
}
.board-col { flex: 1; min-width: 165px; display: flex; flex-direction: column; gap: 8px; }
.board-col-title {
  text-align: center; font-weight: 900; font-size: 13px;
  text-transform: uppercase; letter-spacing: 1.2px;
  color: var(--gold); padding: 10px 6px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  text-shadow: 0 0 14px rgba(255, 201, 61, 0.4);
}
.board-card {
  min-height: 52px; border-radius: 12px; font-size: 15px; font-weight: 700;
  background: linear-gradient(135deg, rgba(255, 45, 120, 0.16), rgba(0, 229, 255, 0.10));
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; text-align: center;
  padding: 8px 10px; line-height: 1.25;
}
.board-card:not(.used):not(.opened) { font-size: 22px; color: var(--cyan); }
.board-card:hover:not(:disabled) {
  transform: translateY(-2px);
  border-color: rgba(0, 229, 255, 0.6);
  box-shadow: var(--glow-cyan);
}
.board-card.opened {
  border-color: var(--gold); color: var(--gold);
  box-shadow: 0 0 14px rgba(255, 201, 61, 0.25);
  animation: flip 0.4s ease;
}
.board-card.used {
  opacity: 0.38; background: rgba(255, 255, 255, 0.03);
  color: var(--dim); box-shadow: none;
}
@keyframes flip { from { transform: rotateX(90deg); } to { transform: rotateX(0); } }

/* ---------- theme picker ---------- */
#theme-picker { margin-left: auto; display: flex; gap: 4px; }
#theme-picker button {
  padding: 6px 8px; font-size: 16px; border-radius: 10px; opacity: 0.45;
  border: 1px solid transparent;
}
#theme-picker button.selected {
  opacity: 1; border-color: var(--border); background: var(--panel);
}

/* =========================================================
   THEME: Диско 90-х — ярко, дерзко, магента и апельсин
   ========================================================= */
body.theme-disco {
  --bg: #1c0533;
  --panel: rgba(255, 255, 255, 0.09);
  --panel-solid: #2d0f4e;
  --border: rgba(255, 255, 255, 0.18);
  --text: #fff8ff;
  --dim: #c9a8e8;
  --pink: #ff2dc4;
  --cyan: #2dff9e;
  --gold: #ffe23d;
  --teamA: #2dbcff;
  --teamB: #ff6f2d;
  --glow-pink: 0 0 26px rgba(255, 45, 196, 0.6);
  --glow-cyan: 0 0 26px rgba(45, 255, 158, 0.45);
}
body.theme-disco::before {
  background: conic-gradient(from 0deg, #ff2dc4, #ffe23d, #2dff9e, #2dbcff, #ff2dc4);
  opacity: 0.22; filter: blur(70px);
  animation: spin 30s linear infinite;
}
body.theme-disco::after {
  background: radial-gradient(circle, #ff6f2d 0%, transparent 60%);
  opacity: 0.25;
}
@keyframes spin { to { transform: rotate(360deg) scale(1.15); } }
body.theme-disco #nav .logo { background-image: linear-gradient(90deg, #ffe23d, #ff2dc4, #2dff9e); }
body.theme-disco .big-btn { background: linear-gradient(135deg, #ff2dc4, #ff6f2d); }
body.theme-disco #nav button.active { background: linear-gradient(135deg, #ff2dc4, #9e2dff); }
body.theme-disco .board-card { background: linear-gradient(135deg, rgba(255,45,196,0.22), rgba(45,255,158,0.14)); }
body.theme-disco h1 { font-style: italic; }

/* =========================================================
   THEME: Сцена — чёрный бархат, золото, тёплые софиты
   ========================================================= */
body.theme-stage {
  --bg: #0c0a08;
  --panel: rgba(255, 214, 130, 0.05);
  --panel-solid: #1a150e;
  --border: rgba(255, 214, 130, 0.16);
  --text: #fdf6e8;
  --dim: #a89877;
  --pink: #e8a33d;
  --cyan: #ffd682;
  --gold: #ffd682;
  --teamA: #7fb8ff;
  --teamB: #ff9d5c;
  --glow-pink: 0 0 24px rgba(232, 163, 61, 0.5);
  --glow-cyan: 0 0 24px rgba(255, 214, 130, 0.35);
}
body.theme-stage::before {
  background: conic-gradient(from 200deg at 30% -10%, transparent 40%, rgba(255, 214, 130, 0.5) 47%, transparent 54%);
  width: 100vw; height: 100vh; border-radius: 0;
  top: 0; left: 0; filter: blur(30px); opacity: 0.5;
  animation: sway 14s ease-in-out infinite alternate;
}
body.theme-stage::after {
  background: conic-gradient(from 160deg at 70% -10%, transparent 40%, rgba(255, 160, 90, 0.4) 47%, transparent 54%);
  width: 100vw; height: 100vh; border-radius: 0;
  top: 0; left: 0; right: auto; bottom: auto; filter: blur(30px); opacity: 0.5;
  animation: sway 17s ease-in-out infinite alternate-reverse;
}
@keyframes sway { from { transform: rotate(-4deg); } to { transform: rotate(5deg); } }
body.theme-stage h1, body.theme-stage .logo, body.theme-stage #picked-title,
body.theme-stage #winner-text, body.theme-stage .team-name {
  font-family: Georgia, "Times New Roman", serif;
}
body.theme-stage #nav .logo { background-image: linear-gradient(90deg, #ffd682, #e8a33d, #fff3d6); }
body.theme-stage .big-btn { background: linear-gradient(135deg, #e8a33d, #b8741f); color: #1a1004; }
body.theme-stage #nav button.active { background: linear-gradient(135deg, #e8a33d, #9c6a1e); color: #1a1004; }
body.theme-stage .lyric-line.current { text-shadow: 0 0 24px rgba(255, 214, 130, 0.9), 0 0 60px rgba(232, 163, 61, 0.4); }
body.theme-stage .board-card { background: linear-gradient(135deg, rgba(232,163,61,0.16), rgba(255,214,130,0.07)); }
body.theme-stage .board-card:not(.used):not(.opened) { color: var(--gold); }
body.theme-stage #player {
  background:
    radial-gradient(ellipse 60% 45% at 50% -10%, rgba(255, 214, 130, 0.25), transparent),
    var(--bg);
}

@media (max-width: 640px) {
  .team-score { font-size: 48px; }
  .lyric-line { font-size: 22px; }
  .lyric-line.current { font-size: 30px; }
  #nav { flex-wrap: wrap; }
}