:root {
  --navy: #1C3B6E;
  --navy-dark: #14294E;
  --bg: #F4F7FB;
  --card: #FFFFFF;
  --muted: #7A96B8;
  --text: #0F1F3A;
  --border: #E2E9F2;
  --accent-grad: linear-gradient(135deg, #2A5BA0 0%, #1C3B6E 100%);
  --shadow: 0 4px 18px rgba(28, 59, 110, 0.08);
  --danger: #C04040;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  min-height: 100vh;
}

.hidden { display: none !important; }
.mobile-only { display: none; }
.muted { color: var(--muted); font-size: 13px; }

#sidebar {
  width: 320px;
  background: var(--navy);
  color: #fff;
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 20;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.logo {
  width: 40px; height: 40px;
  background: var(--accent-grad);
  color: #fff;
  border-radius: 10px;
  display: grid; place-items: center;
  font-weight: 800; font-size: 20px;
}
.brand-name { font-weight: 700; letter-spacing: 0.5px; }
.brand-sub { font-size: 12px; color: #B7C9E2; }

.add-form { display: flex; flex-direction: column; gap: 8px; }
.add-form label { font-size: 12px; color: #B7C9E2; text-transform: uppercase; letter-spacing: 1px; }
.add-form input {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  padding: 10px 12px; border-radius: 8px;
  font-size: 14px; outline: none;
}
.add-form input::placeholder { color: #8FA8C7; }
.add-form input:focus { border-color: #5C8FD0; background: rgba(255,255,255,0.12); }
.add-form button {
  background: var(--accent-grad); color: #fff; border: none;
  padding: 10px; border-radius: 8px; font-weight: 600; cursor: pointer;
  transition: transform 0.1s;
}
.add-form button:hover { transform: translateY(-1px); }
.add-form button:disabled { opacity: 0.6; cursor: wait; }
.add-status { font-size: 12px; color: #B7C9E2; min-height: 14px; }

.library-header {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; text-transform: uppercase; letter-spacing: 1px;
  color: #B7C9E2; margin-top: 6px;
}
.badge { background: rgba(255,255,255,0.1); padding: 2px 8px; border-radius: 10px; font-size: 11px; }

.lib-search {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: #fff;
  padding: 7px 10px; border-radius: 6px; font-size: 13px; outline: none;
}
.lib-search:focus { border-color: #5C8FD0; }

.library { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.lib-item {
  display: flex; gap: 10px; padding: 8px; border-radius: 8px; cursor: pointer;
  background: rgba(255,255,255,0.04);
  border: 1px solid transparent;
  transition: background 0.15s, border 0.15s;
}
.lib-item:hover { background: rgba(255,255,255,0.09); }
.lib-item.active { background: rgba(255,255,255,0.14); border-color: rgba(255,255,255,0.2); }
.lib-thumb {
  width: 56px; height: 42px; object-fit: cover; border-radius: 5px;
  background: #2A4A7A; flex-shrink: 0;
}
.lib-meta { min-width: 0; flex: 1; }
.lib-title { font-size: 13px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lib-sub { font-size: 11px; color: #B7C9E2; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lib-status-row { display: flex; align-items: center; gap: 6px; }
.lib-status { font-size: 11px; }
.lib-status.processing, .lib-status.queued { color: #FFD27A; }
.lib-status.error { color: #FF8585; }
.lib-status.ready { color: #79E1A0; }
.lib-q {
  margin-left: auto; font-size: 10px; font-weight: 700; line-height: 1;
  padding: 2px 6px; border-radius: 999px; color: #fff; flex-shrink: 0;
}
.lib-q.q-excellent { background: #1F9D55; }
.lib-q.q-good { background: #2F80ED; }
.lib-q.q-fair { background: #D98A00; }
.lib-q.q-rough { background: #C0392B; }

#main { flex: 1; min-width: 0; padding: 24px 28px; display: flex; flex-direction: column; gap: 18px; }
.topbar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.topbar-text { flex: 1; min-width: 0; }
.topbar h1 { margin: 0; font-size: 22px; }
.now-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.now-badges .pill {
  background: #fff; border: 1px solid var(--border);
  color: var(--navy); font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 999px;
  box-shadow: var(--shadow);
}
.now-badges .pill.quality { color: #fff; border: none; cursor: pointer; }
.pill.quality.q-excellent { background: #1F9D55; }
.pill.quality.q-good { background: #2F80ED; }
.pill.quality.q-fair { background: #D98A00; }
.pill.quality.q-rough { background: #C0392B; }

/* Sheet-music quality breakdown modal */
.q-modal-bg {
  position: fixed; inset: 0; background: rgba(12,22,40,0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 20px;
}
.q-modal {
  background: var(--card); color: var(--text); width: 100%; max-width: 420px;
  border-radius: 14px; box-shadow: 0 18px 50px rgba(0,0,0,0.35); overflow: hidden;
}
.q-head {
  display: flex; align-items: center; gap: 12px; padding: 16px 18px; color: #fff;
}
.q-head.q-excellent { background: #1F9D55; }
.q-head.q-good { background: #2F80ED; }
.q-head.q-fair { background: #D98A00; }
.q-head.q-rough { background: #C0392B; }
.q-head .q-score { font-size: 28px; font-weight: 800; line-height: 1; }
.q-head .q-label { font-size: 16px; font-weight: 700; }
.q-head .q-close {
  margin-left: auto; background: transparent; border: none; color: #fff;
  font-size: 26px; line-height: 1; cursor: pointer;
}
.q-verdict { margin: 14px 18px 6px; font-size: 13px; color: var(--muted); }
.q-rows { padding: 6px 18px 10px; display: flex; flex-direction: column; gap: 8px; }
.q-row { display: flex; align-items: center; gap: 10px; font-size: 12px; }
.q-row > span:first-child { width: 92px; flex-shrink: 0; }
.q-row b { width: 26px; text-align: right; font-variant-numeric: tabular-nums; }
.q-bar { flex: 1; height: 7px; border-radius: 4px; background: var(--bg); overflow: hidden; }
.q-bar i { display: block; height: 100%; background: var(--navy); border-radius: 4px; }
.q-ref {
  margin: 0; padding: 12px 18px 16px; font-size: 12px; color: var(--muted);
  border-top: 1px solid var(--border);
}
.q-ref.ok { color: var(--text); }
.q-ref a { color: var(--navy); font-weight: 600; }
.icon-btn { background: transparent; border: none; color: var(--text); font-size: 22px; cursor: pointer; padding: 4px 10px; }

.empty {
  background: var(--card); border-radius: 14px; padding: 60px 30px;
  text-align: center; box-shadow: var(--shadow); border: 1px solid var(--border);
}
.empty-art { font-size: 72px; color: var(--navy); opacity: 0.25; }
.empty h2 { margin: 12px 0 6px; color: var(--navy); }
.empty p { max-width: 480px; margin: 0 auto; color: var(--muted); }

.player {
  background: var(--card); border-radius: 14px; padding: 18px;
  box-shadow: var(--shadow); border: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 14px;
}
.player-controls { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.play-btn {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--accent-grad); color: #fff; border: none; cursor: pointer;
  font-size: 18px; padding-left: 4px; box-shadow: var(--shadow);
}
.progress-wrap { flex: 1; min-width: 220px; display: flex; align-items: center; gap: 10px; }
.time { font-variant-numeric: tabular-nums; font-size: 12px; color: var(--muted); min-width: 38px; text-align: center; }
.progress { flex: 1; height: 8px; background: #E8EEF7; border-radius: 4px; cursor: pointer; position: relative; overflow: hidden; }
.progress-fill { height: 100%; width: 0%; background: var(--accent-grad); transition: width 0.1s linear; }
.loop-mark {
  position: absolute; top: -2px; bottom: -2px; width: 2px; background: #C04040;
  display: none;
}
.loop-mark.shown { display: block; }

.ghost-btn {
  background: transparent; color: var(--navy); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: 8px; font-size: 13px; font-weight: 500;
  text-decoration: none; cursor: pointer;
}
.ghost-btn.small { padding: 4px 10px; font-size: 12px; }
.ghost-btn:hover { background: #EEF3FA; }
.ghost-btn.danger { color: var(--danger); border-color: #F0D5D5; }
.ghost-btn.danger:hover { background: #FBEFEF; }

.control-row {
  display: flex; flex-wrap: wrap; gap: 18px;
  padding: 10px 14px; background: #F8FAFD; border: 1px solid var(--border); border-radius: 10px;
  font-size: 13px;
}
.ctl { display: flex; align-items: center; gap: 8px; }
.ctl > span:first-child { color: var(--muted); text-transform: uppercase; font-size: 11px; letter-spacing: 1px; }
.ctl input[type=range] { width: 110px; }
.ctl.mixer { gap: 6px; }
.ctl.mixer input[type=range] { width: 90px; }
.mixer-row { background: #EEF3FA; }
.mixer-info { color: var(--muted); font-size: 12px; flex: 1; min-width: 200px; }
button.on { background: var(--accent-grad) !important; color: #fff !important; border-color: transparent !important; }
.ctl .val { color: var(--navy); font-weight: 600; font-variant-numeric: tabular-nums; min-width: 36px; text-align: right; }

.view-toggle {
  display: flex; gap: 6px; align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
}
.view-tab {
  background: transparent; border: none;
  padding: 6px 14px;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  font-size: 13px; font-weight: 500;
  color: var(--muted);
}
.view-tab:hover { color: var(--navy); background: #EEF3FA; }
.view-tab.active { color: var(--navy); background: #EEF3FA; }
.view-spacer { margin-left: auto; }
.score-options { display: flex; gap: 6px; }
.score-options.hidden { display: none; }

.canvas-wrap {
  background: linear-gradient(180deg, #F8FAFD 0%, #EEF3FA 100%);
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
  height: 260px;
  position: relative;
}
.score-wrap {
  background: #FFFFFF;
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 18px 12px;
  max-height: 520px;
  overflow: auto;
}
#osmdContainer { min-height: 200px; }
.score-empty { color: var(--muted); font-style: italic; text-align: center; padding: 30px; }
#pianoRoll { width: 100%; height: 100%; display: block; }
.chord-overlay {
  position: absolute; top: 6px; left: 12px; right: 12px;
  color: var(--navy); font-weight: 700; font-size: 13px;
  text-shadow: 0 1px 2px rgba(255,255,255,0.8);
  pointer-events: none;
  display: flex; gap: 8px; flex-wrap: wrap;
  opacity: 0.75;
}
.chord-overlay .cur {
  font-size: 18px; color: #fff;
  background: var(--accent-grad); padding: 2px 10px; border-radius: 6px;
}

.lyrics {
  background: #F8FAFD; border-radius: 10px; padding: 18px 20px;
  border: 1px solid var(--border);
  max-height: 280px; overflow-y: auto; line-height: 1.9;
  font-size: 16px;
}
.lyric-word {
  color: #5A7099;
  transition: color 0.1s, background 0.1s, transform 0.1s;
  padding: 1px 2px; border-radius: 3px; display: inline-block;
}
.lyric-word.past { color: #2A4A7A; }
.lyric-word.active {
  color: #fff; background: var(--accent-grad);
  transform: translateY(-1px) scale(1.05); font-weight: 600;
}
.lyrics-empty { color: var(--muted); font-style: italic; text-align: center; }

/* Cookies block */
.cookies-block {
  margin-top: 14px; padding: 10px 12px;
  background: rgba(255,255,255,0.05); border-radius: 8px; font-size: 12px;
}
.cookies-block summary {
  cursor: pointer; color: #B7C9E2;
  display: flex; align-items: center; gap: 8px; list-style: none;
  text-transform: uppercase; letter-spacing: 0.8px;
}
.cookies-block summary::-webkit-details-marker { display: none; }
.cookies-help { color: #8FA8C7; margin: 8px 0; line-height: 1.5; font-size: 12px; }
.cookies-help p { margin: 0 0 6px; }
.cookies-help code { background: rgba(255,255,255,0.1); padding: 1px 4px; border-radius: 3px; }
.cookies-help a { color: #B7C9E2; text-decoration: underline; }
.cookies-help a:hover { color: #fff; }
.cookies-help strong { color: #DDE7F4; font-weight: 600; }
.cookies-steps { margin: 6px 0 8px; padding-left: 18px; }
.cookies-steps li { margin-bottom: 4px; }
.cookies-block input[type=file] { width: 100%; color: #B7C9E2; margin: 6px 0; font-size: 11px; }
.cookies-block button {
  background: var(--accent-grad); color: #fff; border: none;
  padding: 6px 12px; border-radius: 6px; cursor: pointer; margin-right: 6px; font-size: 12px;
}
.ghost-btn-dark {
  background: transparent !important;
  border: 1px solid rgba(255,255,255,0.2) !important;
  color: #B7C9E2 !important;
}
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot.on { background: #79E1A0; }
.dot.off { background: #FFB05A; }

@media (max-width: 768px) {
  body { flex-direction: column; }
  .mobile-only { display: inline-flex; }
  #sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; height: 100vh;
    width: 280px;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: 4px 0 20px rgba(0,0,0,0.2);
  }
  #sidebar.open { transform: translateX(0); }
  #closeSidebar { margin-left: auto; color: #fff; }
  #main { padding: 16px; width: 100%; }
  .topbar h1 { font-size: 18px; }
  .canvas-wrap { height: 200px; }
  .lyrics { font-size: 15px; padding: 14px; }
  .play-btn { width: 42px; height: 42px; }
  .control-row { flex-direction: column; gap: 8px; }
  .ctl input[type=range] { width: 140px; }
}