:root {
  color-scheme: light;
  --bg: #f6f0e6;
  --bg-accent: #efe6d6;
  --surface: #ffffff;
  --surface-alt: #fefaf2;
  --ink: #1f1b16;
  --muted: #6f675a;
  --accent: #0f8c7a;
  --accent-strong: #0a6b5e;
  --accent-warm: #d99f4c;
  --border: rgba(31, 27, 22, 0.12);
  --shadow: 0 12px 30px rgba(24, 18, 8, 0.08);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
}

body[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1214;
  --bg-accent: #161b1f;
  --surface: #151b20;
  --surface-alt: #1c242a;
  --ink: #f4efe7;
  --muted: #a8b0b7;
  --accent: #3ad1b6;
  --accent-strong: #1f9c86;
  --accent-warm: #d7a55c;
  --border: rgba(255, 255, 255, 0.14);
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

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

body {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 20%, #fef7ea 0%, var(--bg) 48%, var(--bg-accent) 100%);
  min-height: 100vh;
}

body[data-theme="dark"] {
  background: radial-gradient(circle at 20% 20%, #1c262c 0%, var(--bg) 45%, var(--bg-accent) 100%);
}

.app-shell {
  padding: 120px 6vw 80px;
}

.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 6vw;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

body[data-theme="dark"] .top-bar {
  background: rgba(15, 18, 20, 0.88);
}

.top-bar__left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.top-bar__brand {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.top-bar__brand-link {
  color: inherit;
  text-decoration: none;
}

.top-bar__nav {
  display: flex;
  gap: 14px;
  align-items: center;
}

.top-bar__link {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.top-bar__link:hover {
  color: var(--ink);
  border-color: var(--border);
  background: var(--surface);
}

.top-bar__link--active {
  color: var(--ink);
  background: var(--surface);
  border-color: var(--border);
}

.top-bar__controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.top-bar__toggles {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.top-bar__label {
  font-size: 0.85rem;
  color: var(--muted);
}

.top-bar__select {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  font-family: inherit;
}

.top-bar__button {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.85rem;
  cursor: pointer;
}

body[data-theme="dark"] .top-bar__button {
  background: var(--surface-alt);
  color: var(--ink);
}

.top-bar__button--danger {
  border-color: rgba(194, 71, 52, 0.4);
  color: #a33c2c;
}

.top-bar__status {
  font-size: 0.85rem;
  color: var(--muted);
  min-height: 1.2em;
}

.practice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.practice-column {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.panel {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid rgba(31, 27, 22, 0.08);
  padding: 24px;
}

body[data-theme="dark"] .panel {
  border-color: rgba(255, 255, 255, 0.08);
}

.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.panel__eyebrow {
  margin: 0 0 6px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
}

.panel__content {
  margin-top: 20px;
  display: grid;
  gap: 18px;
}

.panel h2 {
  margin: 0;
  font-size: 1.4rem;
}

.panel__actions {
  display: flex;
  gap: 10px;
}

.data-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.data-hero h1 {
  margin: 0;
  font-size: 2.2rem;
}

.data-hero__sub {
  margin: 12px 0 0;
  color: var(--muted);
  max-width: 520px;
}

.data-hero__meta {
  margin-top: 18px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.data-hero__actions {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.data-hero__note {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.data-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.data-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.stat-card {
  background: var(--surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 16px;
}

.stat-card__label {
  margin: 0;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.stat-card__value {
  margin-top: 8px;
  font-size: 1.4rem;
  font-weight: 600;
}

.data-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.data-cards {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.data-card {
  padding: 14px;
  border-radius: var(--radius-md);
  background: var(--surface-alt);
  border: 1px solid var(--border);
}

.data-card__title {
  font-weight: 600;
}

.data-card__value {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 6px;
}

.data-card__meta {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.8rem;
}

.data-table-wrapper {
  margin-top: 18px;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.data-table th {
  text-align: left;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  padding-bottom: 12px;
}

.data-table td {
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.data-empty {
  color: var(--muted);
  text-align: center;
  padding: 14px;
}

.chart {
  margin-top: 18px;
  background: var(--surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  padding: 12px 16px 18px;
}

.chart svg {
  width: 100%;
  height: 260px;
}

.chart__line {
  stroke: var(--accent);
  stroke-width: 3;
  fill: none;
}

.chart__area {
  fill: rgba(15, 140, 122, 0.14);
}

body[data-theme="dark"] .chart__area {
  fill: rgba(58, 209, 182, 0.18);
}

.chart__labels {
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--muted);
}

.chart-legend {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--muted);
}

.chart-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

.button {
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
}

.button--primary {
  background: var(--accent);
  color: #fff;
}

.button--ghost {
  background: rgba(31, 27, 22, 0.06);
  color: var(--ink);
}

.button--outline {
  border: 1px solid var(--accent);
  color: var(--accent-strong);
  background: transparent;
}

.button--danger {
  background: #c24634;
  color: #fff;
}

.button--danger:hover {
  background: #a63b2c;
}

.tempo-display {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 2.6rem;
  font-weight: 600;
}

.tempo-display__unit {
  font-size: 1rem;
  color: var(--muted);
}

.tempo-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tempo-controls__slider {
  flex: 1;
}

.sound-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: center;
}

.sound-block__row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sound-block__preview {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  font-size: 0.9rem;
}

body[data-theme="dark"] .sound-block__preview {
  background: var(--surface-alt);
}

.sound-block__group {
  display: grid;
  gap: 8px;
}

.sound-block__label {
  font-size: 0.85rem;
  color: var(--muted);
}

.sound-block__select {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-alt);
  flex: 1;
  min-width: 0;
}

.sound-block__slider {
  height: 120px;
  width: 24px;
  writing-mode: bt-lr;
  -webkit-appearance: slider-vertical;
}

.timer-display {
  font-family: "Spline Sans Mono", "Consolas", monospace;
  font-size: 2.4rem;
  letter-spacing: 0.06em;
}

.timer-panel--inactive .timer-display {
  opacity: 0.4;
}

.timer-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.timer-controls__group {
  display: grid;
  gap: 6px;
}

.timer-controls__row {
  align-items: center;
  gap: 12px;
}

.timer-controls__label {
  font-size: 0.85rem;
  color: var(--muted);
}

.timer-controls__select {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.toggle {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  font-size: 0.9rem;
}

.toggle--switch {
  gap: 10px;
}

.toggle--switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle__track {
  position: relative;
  width: 44px;
  height: 24px;
  border-radius: 999px;
  background: rgba(31, 27, 22, 0.18);
  transition: background 0.2s ease;
}

.toggle__track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease;
}

.toggle--switch input:checked + .toggle__track {
  background: var(--accent);
}

.toggle--switch input:checked + .toggle__track::after {
  transform: translateX(20px);
}

.toggle__label {
  color: var(--ink);
}

body[data-theme="dark"] .toggle__track {
  background: rgba(255, 255, 255, 0.22);
}

body[data-theme="dark"] .toggle--switch input:checked + .toggle__track {
  background: var(--accent);
}

.sheet-panel__content {
  position: relative;
  min-height: 320px;
  border-radius: var(--radius-md);
  background: var(--surface-alt);
  padding: 16px;
  border: 1px solid var(--border);
}

body[data-theme="dark"] .sheet-panel__content {
  background: #f4efe7;
}

body[data-theme="dark"] .sheet-panel__overlay {
  background: rgba(15, 18, 20, 0.85);
  color: #f4efe7;
}

.sheet-panel__viewer {
  position: relative;
  z-index: 2;
}

.sheet-panel__placeholder {
  position: absolute;
  inset: 16px;
  border-radius: var(--radius-md);
  background: repeating-linear-gradient(
    to bottom,
    rgba(31, 27, 22, 0.08),
    rgba(31, 27, 22, 0.08) 2px,
    transparent 2px,
    transparent 22px
  );
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sheet-panel__overlay {
  padding: 12px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--muted);
  font-size: 0.9rem;
}

.selection-panel__content {
  display: grid;
  gap: 20px;
}

.selection-panel__row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill,
.chip {
  border-radius: 999px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  font-weight: 600;
  cursor: pointer;
}

.pill--active,
.chip--active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.selection-panel__scales {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.layout-stage {
  position: relative;
  width: 100%;
  height: calc(100vh - 200px);
  min-height: 620px;
}

.layout-stage__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-origin: top left;
  transition: transform 0.2s ease;
}

.layout-item {
  position: absolute;
  min-width: 120px;
  min-height: 120px;
}

.layout-item[data-panel="selection"] {
  z-index: 3;
}

.layout-item__content {
  height: 100%;
}

.layout-item__handle {
  position: absolute;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 3;
  cursor: grab;
}

.layout-item__handle--drag {
  top: 8px;
  left: 8px;
}

.layout-item__handle--resize {
  bottom: 8px;
  right: 8px;
  cursor: se-resize;
}

.layout-stage--editable .layout-item__handle {
  display: inline-flex;
}

.layout-stage--editable .layout-item {
  outline: 2px dashed rgba(15, 140, 122, 0.3);
  outline-offset: 6px;
}

@media (max-width: 900px) {
  .practice-grid {
    grid-template-columns: 1fr;
  }

  .top-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .data-hero {
    grid-template-columns: 1fr;
  }

  .data-hero__stats {
    grid-template-columns: 1fr 1fr;
  }

  .data-grid {
    grid-template-columns: 1fr;
  }

  .layout-stage {
    height: calc(100vh - 260px);
  }
}