/* Bảng màu "phòng hát nhung": nền tím nhung, hồng neon cho giọng, đồng thau cho nhạc */
:root {
  --velvet: #21102b;
  --plum: #34183f;
  --plum-2: #4a2559;
  --line: #5e3570;
  --ink: #f6ecf8;
  --mute: #b9a2c4;
  --rose: #ff5fa2;
  --brass: #e9b949;
  --aqua: #62d2e0;
  --lilac: #b18cff;
  --danger: #ff7a6b;

  --display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --text: "Be Vietnam Pro", system-ui, sans-serif;

  color-scheme: dark;
}

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

html,
body {
  margin: 0;
  background: var(--velvet);
  color: var(--ink);
  font-family: var(--text);
  font-size: 16px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--brass);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.tag {
  display: inline-block;
  min-width: 2.6em;
  padding: 0.1em 0.45em;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  text-align: center;
}
.tag-beat {
  background: color-mix(in srgb, var(--brass) 22%, transparent);
  color: var(--brass);
}
.tag-youtube {
  background: color-mix(in srgb, var(--rose) 20%, transparent);
  color: var(--rose);
}

/* thanh trượt dùng chung */
input[type="range"] {
  --p: 50%;
  appearance: none;
  width: 100%;
  height: 28px;
  background: transparent;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--track, var(--rose)) var(--p), var(--plum-2) var(--p));
}
input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--track, var(--rose)) var(--p), var(--plum-2) var(--p));
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -8px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--track, var(--rose));
}
input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 3px solid var(--track, var(--rose));
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}