:root {
  color-scheme: dark;
  --bg: #080a08;
  --panel: #14170f;
  --panel-2: #1d2116;
  --line: #405039;
  --text: #f2ecd7;
  --muted: #aba782;
  --green: #87f5a9;
  --amber: #efc35a;
  --blue: #75c8e0;
  --red: #e56d62;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 16% 10%, rgba(117,200,224,.08), transparent 28%),
    radial-gradient(circle at 78% 5%, rgba(239,195,90,.08), transparent 24%),
    linear-gradient(90deg, rgba(135,245,169,.03) 1px, transparent 1px) 0 0 / 48px 48px,
    #080a08;
  color: var(--text);
  font-family: ui-monospace, Consolas, "Liberation Mono", "Noto Sans JP", monospace;
  line-height: 1.6;
}

a { color: inherit; }
button, input { font: inherit; }

.wave-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 4vw, 42px);
  border-bottom: 1px solid rgba(135,245,169,.18);
  background: rgba(8,10,8,.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  aspect-ratio: 1;
  border: 1px solid var(--green);
  color: var(--green);
  background: #040604;
}

.brand strong,
.brand small,
.hero p span,
.notes-panel p span {
  display: block;
}

.brand small,
.wave-nav,
.kicker,
.status-card,
.panel p,
.slider-stack span,
.canvas-label,
.notes-panel small {
  color: var(--muted);
  font-size: .75rem;
  text-transform: uppercase;
}

.wave-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.wave-nav a { text-decoration: none; }

main {
  width: min(1240px, calc(100% - 28px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 340px);
  gap: 20px;
  align-items: end;
  padding: clamp(34px, 7vw, 82px) 0 24px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 7vw, 5.8rem);
  line-height: .95;
  letter-spacing: 0;
}

.hero p {
  max-width: 780px;
  margin: 16px 0 0;
}

.status-card,
.panel {
  border: 1px solid rgba(135,245,169,.18);
  border-radius: 6px;
  background: linear-gradient(180deg, rgba(29,33,22,.96), rgba(13,15,11,.96));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.035);
}

.status-card {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.status-card span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(171,167,130,.28);
}

.paint-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 18px;
  align-items: start;
}

.panel { padding: 18px; }

.panel-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel h2,
.section-head h2,
.notes-panel h2 {
  margin: 0;
  line-height: 1.25;
}

.canvas-shell {
  position: relative;
  min-height: 430px;
  border: 1px solid rgba(171,167,130,.22);
  background:
    radial-gradient(circle at 50% 50%, rgba(135,245,169,.07), transparent 32%),
    #050705;
  overflow: hidden;
  touch-action: none;
  cursor: crosshair;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
}

.canvas-label {
  position: absolute;
  left: 14px;
  bottom: 12px;
  display: grid;
  gap: 2px;
  pointer-events: none;
}

.canvas-label span { color: var(--green); }

.control-stack {
  display: grid;
  gap: 12px;
}

.tool-grid,
.palette-grid,
.button-grid,
.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

button {
  min-height: 42px;
  border: 1px solid rgba(171,167,130,.38);
  border-radius: 4px;
  background: #242819;
  color: var(--text);
  cursor: pointer;
}

button:hover,
button:focus-visible,
button.is-active {
  border-color: var(--green);
  color: var(--green);
}

button.primary {
  border-color: var(--green);
  background: var(--green);
  color: #071009;
  font-weight: 700;
}

.slider-stack {
  display: grid;
  gap: 12px;
}

.slider-stack label {
  display: grid;
  gap: 7px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--green);
}

.signals-panel {
  margin-top: 22px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.section-head small,
.notes-panel small {
  display: block;
  margin-top: 4px;
  text-transform: none;
}

.notes-panel {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: 20px;
  margin-top: 22px;
  padding: 24px 0 36px;
  border-top: 1px solid rgba(171,167,130,.18);
}

.wave-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 20px clamp(16px, 4vw, 42px);
  border-top: 1px solid rgba(135,245,169,.16);
  color: var(--muted);
}

@media (max-width: 940px) {
  .hero,
  .paint-layout,
  .notes-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .wave-header {
    align-items: flex-start;
    flex-direction: column;
  }

  main {
    width: min(100% - 20px, 1240px);
  }

  .tool-grid,
  .palette-grid,
  .button-grid,
  .preset-grid {
    grid-template-columns: 1fr;
  }

  .panel { padding: 14px; }

  .canvas-shell { min-height: 280px; }
}