:root {
  color-scheme: dark;
  --bg: #09090b;
  --panel: color-mix(in srgb, var(--bg) 86%, white);
  --panel-2: color-mix(in srgb, var(--bg) 74%, white);
  --panel-3: color-mix(in srgb, var(--bg) 62%, white);
  --text: #f7f3e8;
  --muted: #9d9a91;
  --accent: #ff4d2e;
  --accent-2: #ffe15d;
  --ok: #41d487;
  --border: rgba(247, 243, 232, 0.16);
  --control: color-mix(in srgb, var(--bg) 92%, white);
  --rhythm-accent: var(--accent);
  --rhythm-secondary: color-mix(in srgb, var(--accent) 52%, var(--accent-2));
  --rhythm-light: var(--accent-2);
  --rhythm-rest: var(--panel-3);
  --beat-idle: color-mix(in srgb, var(--bg) 70%, white);
  --accent-soft: color-mix(in srgb, var(--accent) 24%, transparent);
  --accent-progress: color-mix(in srgb, var(--accent) 42%, transparent);
  --accent-2-progress: color-mix(in srgb, var(--accent-2) 42%, transparent);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  height: 100vh;
  margin: 0;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(0deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px) 0 0 / 48px 48px,
    var(--bg);
  color: var(--text);
  user-select: none;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
  user-select: none;
}

.app {
  height: 100vh;
  width: 100vw;
  margin: 0 auto;
  padding: clamp(12px, 1vw, 24px);
  display: grid;
  grid-template-columns: minmax(150px, 0.72fr) minmax(300px, 1.44fr) minmax(180px, 0.86fr);
  grid-template-rows: minmax(260px, 0.55fr) minmax(300px, 1fr);
  grid-template-areas:
    "rhythm tempo settings"
    "rhythm tempo practice";
  gap: clamp(10px, 1vw, 24px);
}

.panel {
  border: 2px solid var(--border);
  border-radius: 28px;
  background: var(--panel);
}


.theme-dock {
  position: relative;
  grid-area: theme;
  align-self: start;
  display: grid;
  gap: 10px;
  z-index: 4;
}

.theme-toggle {
  width: 100%;
  min-height: 56px;
  border: 2px solid var(--border);
  border-radius: 20px;
  background: var(--panel);
  color: var(--text);
  font-size: clamp(1.1rem, 1.35vw, 1.55rem);
  font-weight: 900;
  line-height: 0.88;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

.theme-panel {
  width: 100%;
  display: grid;
  gap: 10px;
  padding: 12px;
}

.theme-panel[hidden] {
  display: none;
}

/* Desktop theme in brand-row */
.theme-dropdown-wrap {
  position: relative;
  display: inline-flex;
  flex-shrink: 0;
}

.theme-toggle-desktop {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.theme-toggle-desktop::before {
  content: '';
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 30%, transparent);
  transition: background 0.2s, box-shadow 0.2s;
}

.theme-toggle-desktop:hover {
  background: var(--panel-3);
  border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
}

.theme-toggle-desktop.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 16%, transparent);
}

.theme-panel-desktop {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 10px;
  width: auto;
  z-index: 10;
  padding: 14px;
  border: 1.5px solid var(--border);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  gap: 10px;
}

.theme-panel-desktop:not([hidden]) {
  display: grid;
}

.theme-panel-desktop .theme-group {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.theme-panel-desktop .theme-group:last-of-type {
  padding-bottom: 0;
  border-bottom: 0;
}

.theme-panel-desktop .theme-swatches {
  display: grid;
  grid-template-columns: repeat(3, 30px);
  gap: 7px;
  justify-content: center;
}

.theme-panel-desktop .theme-swatches button {
  width: 30px;
  height: 30px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--swatch);
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.12s, border-color 0.12s;
}

.theme-panel-desktop .theme-swatches button:hover {
  transform: scale(1.15);
}

.theme-panel-desktop .theme-swatches button.active {
  border-color: var(--text);
  outline: 2.5px solid var(--accent);
  outline-offset: 3px;
}

.theme-panel-desktop .theme-reset {
  min-height: 36px;
  border-radius: 14px;
  background: var(--accent);
  color: #120f0d;
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  border: 0;
  cursor: pointer;
  transition: filter 0.12s;
}

.theme-panel-desktop .theme-reset:hover {
  filter: brightness(0.88);
}

.theme-group {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.theme-group:last-of-type {
  padding-bottom: 0;
  border-bottom: 0;
}

.theme-swatches {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.theme-swatches button {
  width: 32px;
  height: 32px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--swatch);
}

.theme-swatches button.active {
  border-color: var(--text);
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}