/* Misty Band: deep ocean night, cyan neon, mist. */

:root {
  --ink: #051019;
  --surface: #0b1b28;
  --line: rgba(63, 214, 236, 0.16);
  --foam: #eaf6fa;
  --mist: #9cbfd3;
  --aqua: #3fd6ec;
  --aqua-deep: #1490b4;
  --coral: #ff7b6b;
  --display: 'Monoton', cursive;
  --body: 'Instrument Sans', system-ui, sans-serif;
  --mono: 'Space Mono', monospace;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
  margin: 0;
  background:
    radial-gradient(90rem 40rem at 70% -10%, rgba(20, 144, 180, 0.14), transparent 60%),
    radial-gradient(70rem 30rem at 10% 110%, rgba(63, 214, 236, 0.08), transparent 55%),
    var(--ink);
  color: var(--foam);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.55;
}

.wrap {
  max-width: 1020px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */

.site-header { padding: 56px 0 28px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 10px;
}

.wordmark {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(40px, 7.5vw, 76px);
  line-height: 1.05;
  margin: 0;
  color: var(--aqua);
  text-shadow:
    0 0 8px rgba(63, 214, 236, 0.55),
    0 0 34px rgba(63, 214, 236, 0.35),
    0 0 90px rgba(20, 144, 180, 0.35);
}

.lede {
  max-width: 56ch;
  color: var(--mist);
  margin: 18px 0 0;
}

.noscript {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  color: var(--mist);
}

/* Stage */

.stage {
  position: relative;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background:
    radial-gradient(50rem 26rem at 50% 120%, rgba(20, 144, 180, 0.22), transparent 65%),
    var(--surface);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.stage video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
  background: transparent;
}

.stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: pointer;
}

.stage.edit canvas { cursor: grab; }

.stage-card {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: min(340px, calc(100% - 40px));
  text-align: center;
  background: rgba(5, 16, 25, 0.82);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  backdrop-filter: blur(6px);
}

.stage-card p {
  margin: 10px 0 0;
  font-size: 13.5px;
  color: var(--mist);
}

.hud {
  position: absolute;
  left: 14px;
  bottom: 10px;
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mist);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
  pointer-events: none;
}

/* Buttons and controls */

.btn {
  font-family: var(--body);
  font-weight: 600;
  font-size: 15px;
  color: var(--foam);
  background: rgba(63, 214, 236, 0.08);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 18px;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.btn:hover { background: rgba(63, 214, 236, 0.16); border-color: rgba(63, 214, 236, 0.4); }

.btn[aria-pressed="true"] {
  background: var(--aqua);
  border-color: var(--aqua);
  color: var(--ink);
}

.btn-primary {
  background: var(--aqua);
  border-color: var(--aqua);
  color: var(--ink);
}

.btn-primary:hover { background: #6ee2f2; }

:is(.btn, input, kbd):focus-visible,
input[type="range"]:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 3px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 14px;
  padding: 18px 2px 0;
}

.control-field, .control-check {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--mist);
}

.control-field input[type="range"] { accent-color: var(--aqua); width: 140px; }
.control-check input[type="checkbox"] { accent-color: var(--aqua); width: 16px; height: 16px; }

/* Sounds panel */

.sounds-panel {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  background: rgba(11, 27, 40, 0.7);
}

.panel-note { margin: 0 0 12px; font-size: 14px; color: var(--mist); }

.sound-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 9px 0;
  border-top: 1px solid rgba(63, 214, 236, 0.08);
}

.sound-row .drum-name { font-weight: 600; min-width: 72px; }

.sound-row .sample-name {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--mist);
  flex: 1;
  min-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sound-row .sample-name.custom { color: var(--aqua); }

.sound-row input[type="file"] { display: none; }

.btn-small { font-size: 13px; padding: 5px 13px; }

/* How to */

.howto { padding: 44px 2px 8px; max-width: 62ch; }
.howto h2 { font-size: 19px; margin: 26px 0 8px; }
.howto ol { margin: 0; padding-left: 22px; color: var(--mist); }
.howto li { margin: 6px 0; }
.howto li strong { color: var(--foam); }

.keymap { color: var(--mist); }

kbd {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--foam);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
  padding: 2px 7px;
  background: rgba(63, 214, 236, 0.07);
}

/* Footer */

.site-footer {
  margin-top: 56px;
  border-top: 1px solid rgba(63, 214, 236, 0.1);
  padding: 26px 0 44px;
  color: var(--mist);
  font-size: 14.5px;
}

.site-footer strong { color: var(--foam); }

@media (max-width: 640px) {
  .site-header { padding: 36px 0 20px; }
  .stage { aspect-ratio: 4 / 5; }
  .control-field input[type="range"] { width: 110px; }
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}