:root {
  --bg: #0a0c10;
  --panel: #12161d;
  --panel-2: #171c25;
  --border: #232a35;
  --text: #e7ecf3;
  --muted: #8b95a5;
  --accent: #4dd0e1;
  --accent-2: #c62828;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: radial-gradient(1200px 600px at 50% -10%, #16202c 0%, var(--bg) 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.topbar {
  text-align: center;
  padding: 22px 16px 8px;
}
.topbar h1 {
  margin: 0;
  font-size: 1.7rem;
  letter-spacing: 0.3px;
}
.tagline {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.tagline.song-title {
  color: var(--text);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.2px;
}

/* ---- Recently opened ---- */
.recent-wrap {
  margin-top: 26px;
}
.recent-title {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 10px;
}
.recent-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  max-width: 620px;
}
.recent-chip {
  display: flex;
  align-items: stretch;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 9px;
  overflow: hidden;
}
.recent-chip:hover {
  border-color: #33404f;
}
.recent-item {
  background: transparent;
  border: none;
  color: var(--text);
  padding: 8px 10px;
  font-size: 0.85rem;
  cursor: pointer;
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.recent-rm {
  display: flex;
  align-items: center;
  padding: 0 9px;
  color: var(--muted);
  cursor: pointer;
  border-left: 1px solid var(--border);
  font-size: 1rem;
  line-height: 1;
}
.recent-rm:hover {
  color: #ffb4b4;
  background: rgba(255, 180, 180, 0.08);
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 14px;
  min-height: 0;
}

/* ---- Dropzone ---- */
.dropzone {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border);
  border-radius: 18px;
  background: var(--panel);
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
  min-height: 320px;
}
.dropzone.dragging {
  border-color: var(--accent);
  background: #10202a;
  transform: scale(1.005);
}
.dropzone-inner {
  text-align: center;
  padding: 40px;
}
.dropzone-icon {
  font-size: 3rem;
  margin-bottom: 8px;
}
.dropzone-title {
  font-size: 1.25rem;
  margin: 8px 0;
}
.dropzone-sub {
  color: var(--muted);
  margin: 6px 0;
}
.dropzone-hint {
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 18px;
}
.file-button {
  display: inline-block;
  background: var(--accent);
  color: #04222a;
  font-weight: 600;
  padding: 11px 22px;
  border-radius: 10px;
  cursor: pointer;
  transition: filter 0.15s;
}
.file-button:hover {
  filter: brightness(1.08);
}

/* ---- Player ---- */
.player {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
}

.controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
}

.ctrl-btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 9px 16px;
  border-radius: 9px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.15s, border-color 0.15s;
}
.ctrl-btn:hover:not(:disabled) {
  background: #1f2632;
  border-color: #33404f;
}
.ctrl-btn:disabled {
  opacity: 0.5;
  cursor: default;
}
.ctrl-btn.primary {
  background: var(--accent);
  color: #04222a;
  border-color: transparent;
  font-weight: 600;
  min-width: 96px;
}
.ctrl-btn.primary:hover:not(:disabled) {
  filter: brightness(1.08);
  background: var(--accent);
}
.ctrl-btn.ghost {
  margin-left: auto;
  background: transparent;
}
.ctrl-btn.small {
  padding: 7px 11px;
  font-size: 0.85rem;
  min-width: 0;
}
.ctrl-btn.active {
  background: var(--accent);
  color: #04222a;
  border-color: transparent;
  font-weight: 600;
}

.loop-group {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-left: 8px;
  border-left: 1px solid var(--border);
}
#loopLabel {
  color: #9fc0e0;
  min-width: 0;
}

/* ---- Track legend / mixer ---- */
.track-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 2px;
}
.track-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 8px 4px 10px;
  font-size: 0.85rem;
  transition: opacity 0.15s;
}
.track-chip.inactive {
  opacity: 0.45;
}
.track-chip .swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex: none;
}
.track-chip .tname {
  color: var(--text);
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.track-chip .tbtn {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}
.track-chip .tbtn:hover {
  border-color: #33404f;
}
.track-chip .tbtn.active {
  background: var(--accent);
  color: #04222a;
  border-color: transparent;
}

.scrubber {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 220px;
}
#seek {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}
.time-label {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  white-space: nowrap;
}
.bar-label {
  color: #9fc0e0;
  min-width: 96px;
  text-align: right;
}

.toggle,
.speed,
.volume {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 0.9rem;
  white-space: nowrap;
}
.volume input[type="range"] {
  width: 90px;
  accent-color: var(--accent);
  cursor: pointer;
}
.toggle input {
  accent-color: var(--accent);
}
.speed select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 5px 8px;
}
.track-name {
  color: var(--muted);
  font-size: 0.85rem;
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stage {
  flex: 1;
  position: relative;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #0d1117;
  min-height: 360px;
  display: flex;
  flex-direction: column;
}
.fall-canvas {
  display: block;
  width: 100%;
}
.piano-canvas {
  display: block;
  width: 100%;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.45);
}

.error {
  background: #2a1416;
  border: 1px solid #5a2a2e;
  color: #ffb4b4;
  padding: 12px 16px;
  border-radius: 10px;
  text-align: center;
}

.hidden {
  display: none !important;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 10px 16px 18px;
}

@media (max-width: 640px) {
  .ctrl-btn.ghost {
    margin-left: 0;
  }
  .track-name {
    max-width: 100%;
  }
}