:root {
  --bg: #07090c;
  --card: #11151a;
  --line: #252c34;
  --text: #ebe6dc;
  --mute: #8d9298;
  --amber: #e0a458;
  --mint: #7fe3bd;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.35 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.rotate-notice {
  display: none;
}

.rotate-card {
  display: grid;
  justify-items: center;
  gap: 12px;
  width: min(340px, 100%);
  padding: 28px 24px;
  border: 1px solid #554328;
  border-radius: 20px;
  background: linear-gradient(145deg, #171a1d, #0d0f12);
  box-shadow: 0 18px 60px #0009, 0 0 40px rgb(224 164 88 / 8%);
  text-align: center;
}

.rotate-icon {
  width: 58px;
  height: 58px;
  fill: none;
  stroke: var(--amber);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.5;
  animation: rotate-hint 2.4s ease-in-out infinite;
}

.rotate-card h1 {
  font: italic 600 23px/1.15 Georgia, "Iowan Old Style", serif;
}

.rotate-card p {
  max-width: 28ch;
  margin: 0;
  color: #b7b2a8;
}

.rotate-hint {
  color: var(--amber);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

@keyframes rotate-hint {
  0%,
  15% {
    transform: rotate(0);
  }

  45%,
  65% {
    transform: rotate(90deg);
  }

  90%,
  100% {
    transform: rotate(90deg);
  }
}

header {
  display: flex;
  height: 48px;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(12px, 3vw, 32px);
}

h1 {
  margin: 0;
  font: italic 600 23px/1 Georgia, "Iowan Old Style", serif;
  letter-spacing: 0.01em;
}

main {
  position: relative;
  height: calc(100dvh - 48px);
  margin: 0 auto;
  padding: 8px clamp(10px, 2vw, 24px) 12px;
}

.stage {
  position: absolute;
  inset: 0;
  display: flex;
  min-width: 0;
  min-height: 0;
  align-items: center;
  justify-content: center;
}

/* A warm, diffuse spotlight lifts the wood without obscuring the fretboard. */
.stage::before {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 42% 72% at 27% 52%,
    rgb(185 107 45 / 18%),
    rgb(126 72 31 / 8%) 48%,
    transparent 100%
  );
  content: "";
  pointer-events: none;
}

.stage::after {
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 50px 36px var(--bg);
  content: "";
  pointer-events: none;
}

svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 100%;
  cursor: pointer;
  object-fit: contain;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.str,
.glow {
  fill: none;
  stroke-linecap: round;
  pointer-events: none;
}

.glow {
  stroke: var(--amber);
  filter: drop-shadow(0 0 4px rgb(224 164 88 / 75%));
  opacity: 0;
}

.pill {
  fill: #090c10;
  stroke: #53606a;
  stroke-width: 1.6;
}

.num {
  fill: #f0e9dc;
  font: 700 16px system-ui, sans-serif;
  text-anchor: middle;
  paint-order: stroke;
  stroke: #090c10;
  stroke-width: 2px;
  pointer-events: none;
}

.dot {
  fill: var(--mint);
  stroke: #06281d;
  stroke-width: 3;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s;
}

/* Keep the action controls, chord pad, and modifiers aligned as three columns. */
.panel {
  position: absolute;
  right: clamp(10px, 2vw, 24px);
  bottom: clamp(10px, 2vh, 20px);
  z-index: 1;
  display: grid;
  width: min(440px, calc(100% - 20px));
  grid-template-areas: "actions pad mods";
  grid-template-columns: 64px minmax(0, 1fr) 64px;
  align-items: center;
  gap: 5px;
  margin: 0;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #11151aef;
  box-shadow: 0 8px 28px #0008;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}

.actions,
.mods {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 3px;
}

.actions {
  grid-area: actions;
}

.mods {
  grid-area: mods;
  justify-content: center;
}

.actions button,
.mods button {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-template-rows: auto auto;
  align-content: center;
  justify-items: center;
  gap: 1px;
  margin: 0;
  padding: 3px 2px;
  font-size: 9px;
  line-height: 1.1;
  white-space: nowrap;
}

.actions button,
.mods button {
  border-color: #554328;
  background: #242016;
  color: var(--amber);
}

.actions button:hover,
.mods button:hover {
  border-color: var(--amber);
  background: #302719;
}

.mods button[aria-pressed="true"] {
  border-color: var(--amber);
  background: var(--amber);
  color: #1b1206;
}

#open {
  white-space: nowrap;
}

button {
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #181d23;
  color: var(--text);
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    background-color 140ms ease,
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}

button:hover {
  border-color: #3a444f;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

button.main {
  border-color: var(--amber);
  background: var(--amber);
  color: #1b1206;
  font-weight: 600;
}

.actions button.main {
  border-color: #554328;
  background: #242016;
  color: var(--amber);
}

button.ghost {
  margin-left: auto;
}

button[aria-pressed="true"] {
  border-color: var(--amber);
  background: #2a2216;
  color: var(--amber);
}

kbd {
  margin: 0;
  font: 9px/1 ui-monospace, monospace;
  opacity: 0.65;
}

.actions button span,
.mods button span {
  display: block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: clip;
}

output {
  min-width: 6ch;
  padding: 0 4px;
  font: italic 600 18px Georgia, serif;
}

.pad {
  display: grid;
  width: 100%;
  grid-area: pad;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-self: center;
  gap: 2px;
}

.pad button {
  display: grid;
  min-height: 22px;
  align-content: center;
  gap: 0;
  padding: 1px;
  border-radius: 4px;
  text-align: center;
  user-select: none;
  box-shadow: inset 0 1px #ffffff08, 0 2px #090b0e;
}

.pad button:hover {
  background: #222a31;
  box-shadow: inset 0 1px #ffffff12, 0 2px #090b0e, 0 0 0 1px #e0a45855;
  transform: translateY(-1px);
}

.pad i {
  color: var(--mute);
  font: 8px ui-monospace, monospace;
  font-style: normal;
  text-transform: uppercase;
}

.pad span {
  font-size: 10px;
  font-weight: 600;
}

.pad .on {
  border-color: var(--mint);
  background: #10231d;
}

.tip {
  margin: 0;
  color: var(--mute);
  font-size: 11px;
}

/* On phones, wait for landscape before initializing audio or showing the guitar. */
.phone-portrait header,
.phone-portrait main {
  display: none;
}

.phone-portrait .rotate-notice {
  display: grid;
  min-height: 100dvh;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(ellipse at 50% 42%, rgb(185 107 45 / 12%), transparent 58%),
    var(--bg);
}

@media (max-width: 900px) {
  main {
    padding: 0 10px 8px;
  }

  svg {
    width: auto;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
  }

  .panel {
    right: 10px;
    bottom: 8px;
    max-width: 440px;
    gap: 4px;
    padding: 5px;
  }

  .row {
    gap: 4px;
  }

  button {
    padding: 4px 6px;
    font-size: 12px;
  }

  .pad {
    gap: 3px;
  }

  .pad button {
    min-height: 22px;
  }

  .tip {
    display: none;
  }
}

@media (max-width: 700px) and (orientation: landscape) {
  header {
    height: 34px;
    padding-inline: 12px;
  }

  h1 {
    font-size: 18px;
  }

  main {
    height: calc(100dvh - 34px);
    padding: 0 8px 6px;
  }

  .panel {
    right: 8px;
    bottom: 6px;
    width: min(390px, calc(100% - 16px));
    grid-template-columns: 52px minmax(0, 1fr) 52px;
    gap: 3px;
    padding: 4px;
  }

  .actions button,
  .mods button {
    min-height: 24px;
    font-size: 8px;
  }

  .pad {
    gap: 2px;
  }

  .pad button {
    min-height: 21px;
  }
}

@media (max-width: 520px) {
  header {
    height: 42px;
  }

  main {
    height: calc(100dvh - 42px);
  }

  h1 {
    font-size: 21px;
  }

  .panel {
    right: 8px;
    bottom: 6px;
    width: min(400px, calc(100% - 16px));
    grid-template-columns: 56px minmax(0, 1fr) 56px;
    gap: 3px;
    padding: 5px;
  }

  .row {
    gap: 3px;
  }

  button {
    padding: 3px 5px;
    font-size: 11px;
  }

  .actions button,
  .mods button {
    padding: 2px 1px;
    font-size: 8px;
  }

  .pad {
    gap: 2px;
  }

  .pad button {
    min-height: 22px;
    padding: 1px;
  }

  .pad span {
    font-size: 10px;
  }

  .pad i {
    font-size: 8px;
  }
}