:root {
  color-scheme: dark;
  --bg: #050816;
  --panel: rgba(13, 20, 34, 0.88);
  --panel-solid: #0d1422;
  --line: rgba(255, 255, 255, 0.11);
  --text: #eef2ff;
  --muted: #a7b0c5;
  --blue: #60a5fa;
  --pink: #f472b6;
  --green: #34d399;
  --gold: #fbbf24;
  --accent: #8b5cf6;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 0%, rgba(37, 99, 235, 0.38), transparent 34rem),
    radial-gradient(circle at 85% 18%, rgba(52, 211, 153, 0.12), transparent 26rem),
    linear-gradient(135deg, #050816 0%, #101827 52%, #070912 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  max-width: 100%;
  min-width: 0;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(2, 6, 23, 0.82);
  color: var(--text);
  font: inherit;
}

button {
  cursor: pointer;
  padding: 0.72rem 0.86rem;
  font-weight: 760;
}

select {
  width: 100%;
  padding: 0.7rem 0.8rem;
}

option {
  background: #070b15;
  color: var(--text);
}

input[type="range"] {
  padding: 0;
  accent-color: var(--green);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  max-width: 13ch;
  font-size: clamp(2rem, 7vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  font-size: 1rem;
  letter-spacing: 0;
}

h3 {
  margin-top: 1rem;
  font-size: 0.95rem;
}

p,
.intro {
  color: var(--muted);
  line-height: 1.55;
}

label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.86rem;
}

canvas {
  display: block;
  width: 100%;
  height: 330px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  background: #02030a;
}

canvas.tall {
  height: 330px;
}

.site-header {
  display: none;
}

.top-dock {
    position: sticky;
    top: 0;
    z-index: 50;
    display: grid;
    gap: 0.55rem;
    padding: calc(0.65rem + env(safe-area-inset-top)) 0.65rem 0.65rem;
    border-bottom: 1px solid var(--line);
    background: rgba(5, 8, 22, 0.95);
    backdrop-filter: blur(18px);
    align-items: baseline;
    justify-content: stretch;
    align-content: center;
    grid-auto-flow: column;
    justify-items: stretch;
}

.dock-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

.dock-row.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.dock-row.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.language-switch {
  display: flex;
  align-self: flex-start;
  gap: 0.12rem;
  padding: 0.16rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.46);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.language-switch.compact {
  justify-self: end;
  justify-content: flex-end;
}

.language-switch button {
  min-width: 2.35rem;
  min-height: 1.9rem;
  padding: 0.28rem 0.58rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.language-switch button:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.language-switch button.active {
  color: #04111f;
  background: linear-gradient(135deg, var(--green), var(--blue)) !important;
  box-shadow: 0 6px 16px rgba(52, 211, 153, 0.18);
}

.app {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0 0.65rem calc(6rem + env(safe-area-inset-bottom));
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
}

.section,
.canvas-card,
.card {
  padding: 0.85rem;
}

.sidebar,
.main,
.section,
.canvas-card,
.advanced {
  display: grid;
  gap: 0.78rem;
  min-width: 0;
}

.tuning-card {
  transition: border-color 180ms ease, opacity 180ms ease, filter 180ms ease;
}

.tuning-card canvas,
.tuning-card .legend,
.tuning-card .intro {
  transition: filter 180ms ease, opacity 180ms ease;
}

.tuning-card.is-muted {
  border-color: rgba(255, 255, 255, 0.07);
}

.tuning-card.is-muted canvas {
  filter: grayscale(1) saturate(0.22) brightness(0.62);
  opacity: 0.62;
}

.tuning-card.is-muted .legend,
.tuning-card.is-muted .intro {
  opacity: 0.48;
}

.tuning-card.is-listening {
  border-color: rgba(52, 211, 153, 0.34);
}

.sidebar {
  order: 2;
}

.main {
  order: 1;
  display: grid;
  gap: 0.75rem;
}

.visuals {
  display: grid;
  gap: 0.75rem;
}

.visuals:first-of-type {
  order: -2;
}

.readout {
  display: none;
}

.primary {
  border-color: transparent;
  background: linear-gradient(135deg, #2563eb, #16a34a);
}

.ghost {
  background: rgba(255, 255, 255, 0.055);
}

.active {
  border-color: rgba(52, 211, 153, 0.78) !important;
  background: rgba(52, 211, 153, 0.18) !important;
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.chords {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
}

.chord-btn {
  padding-inline: 0.35rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.78rem;
}

.keyboard {
  display: grid;
  grid-template-columns: repeat(14, minmax(0, 1fr));
  gap: 0.28rem;
}

.key {
  min-height: 54px;
  padding: 0.25rem;
  border: 0;
  background: #f8fafc;
  color: #020617;
  font-size: 0.72rem;
  font-weight: 850;
}

.key.black {
  border: 1px solid #334155;
  background: #0f172a;
  color: #e5e7eb;
}

.key.on {
  outline: 3px solid var(--gold);
  transform: translateY(-2px);
}

.advanced {
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
}

.advanced summary {
  min-height: 44px;
  cursor: pointer;
  color: var(--text);
  font-weight: 820;
}

.visual-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.visual-toolbar button {
  min-height: 38px;
  padding: 0.5rem 0.65rem;
  font-size: 0.78rem;
}

.plate-actions {
  display: flex;
  gap: 0.45rem;
}

.legend {
  display: none;
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 0.28rem;
  border-radius: 999px;
}

.dot.blue { background: var(--blue); }
.dot.pink { background: var(--pink); }
.dot.green { background: var(--green); }
.dot.yellow { background: var(--gold); }

.table {
  display: grid;
  gap: 0.3rem;
}

.row {
  display: grid;
  grid-template-columns: 0.8fr 1fr 1fr 1fr;
  gap: 0.5rem;
  align-items: center;
  padding: 0.55rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  color: var(--muted);
  font-size: 0.78rem;
}

.row strong {
  color: var(--text);
}

.bottom-dock {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 80;
  padding: 0.65rem 0.65rem calc(0.65rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: rgba(5, 8, 22, 0.96);
  backdrop-filter: blur(18px);
}

.bottom-dock button {
  padding-inline: 0.4rem;
  font-size: 0.78rem;
}

.faq {
  display: none;
}

.seo-content {
  display: grid;
  gap: 1rem;
}

.seo-content article {
  display: grid;
  gap: 0.35rem;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.seo-content article:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.seo-content h2 {
  font-size: 1.08rem;
}

.seo-content h3 {
  margin: 0;
  color: var(--text);
}

.seo-content p {
  max-width: 72rem;
}

@media (max-width: 720px) {
  .sidebar .section > h2,
  .sidebar label:first-of-type,
  #chordButtons,
  .keyboard,
  .sidebar > .section > .grid2 {
    display: none;
  }

  .advanced {
    display: grid;
  }

  .advanced:not([open]) > :not(summary) {
    display: none;
  }

  .canvas-card .intro,
  .legend,
  .visuals:nth-of-type(2) .mobile-compact,
  .faq {
    display: none;
  }
}

@media (min-width: 721px) {
  .site-header {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    padding: 2rem clamp(1.5rem, 4vw, 3rem) 1rem;
  }

  .eyebrow {
    margin-bottom: 0.8rem;
    color: var(--green);
    font-size: 0.78rem;
    font-weight: 820;
    letter-spacing: 0.14em;
    text-transform: uppercase;
  }

  .site-header .intro {
    max-width: 58rem;
    margin-top: 1rem;
    font-size: 1.05rem;
  }

  .top-dock,
  .bottom-dock {
    display: none;
  }

  .app {
    display: grid;
    grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
    align-items: start;
    gap: 1rem;
    padding: 0.75rem clamp(1.5rem, 4vw, 3rem) 2.5rem;
  }

  .sidebar {
    position: sticky;
    top: 1rem;
    order: 0;
  }

  .main {
    order: 0;
  }

  .advanced {
    border-top: 0;
    padding-top: 0;
  }

  .advanced summary {
    display: none;
  }

  .readout {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .metric {
    font-size: 1.28rem;
    font-weight: 900;
  }

  .visuals {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
  }

  canvas {
    height: 300px;
  }

  canvas.tall {
    height: 430px;
  }

  .legend {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    color: var(--muted);
    font-size: 0.82rem;
  }

  .faq {
    display: block;
  }
}

@media (max-width: 1150px) and (min-width: 721px) {
  .app,
  .visuals {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .readout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}