:root {
  color-scheme: dark;
  --bg: #080806;
  --panel: #15140f;
  --panel-2: #1d1a12;
  --line: rgba(157, 174, 117, .28);
  --text: #f3ecd4;
  --muted: #aaa27d;
  --green: #95e6a0;
  --amber: #e7bf6a;
  --rust: #c06f52;
  --blue: #82c7d8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(149, 230, 160, .04) 1px, transparent 1px) 0 0 / 58px 58px,
    linear-gradient(rgba(231, 191, 106, .035) 1px, transparent 1px) 0 0 / 58px 58px,
    radial-gradient(circle at 50% 0%, rgba(130, 199, 216, .13), transparent 34%),
    #080806;
  color: var(--text);
  font-family: ui-monospace, Consolas, "Noto Sans JP", monospace;
  line-height: 1.6;
}

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

.walker-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 4vw, 42px);
  border-bottom: 1px solid var(--line);
  background: rgba(8, 8, 6, .88);
  backdrop-filter: blur(14px);
}

.brand,
.walker-nav,
.status,
.button-grid,
.footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  aspect-ratio: 1;
  border: 1px solid var(--green);
  background: #030402;
  color: var(--green);
}

.brand strong,
.brand small,
.hero p span,
.manual small {
  display: block;
}

.brand small,
.walker-nav,
.kicker,
.status,
.panel,
.manual p,
.footer {
  color: var(--muted);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: 0;
}

.walker-nav { gap: 14px; flex-wrap: wrap; }
.walker-nav a { text-decoration: none; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 340px);
  gap: clamp(18px, 4vw, 48px);
  align-items: end;
  padding: clamp(34px, 6vw, 72px) clamp(16px, 4vw, 42px) 22px;
}

.hero h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(2.5rem, 6vw, 6.4rem);
  line-height: .92;
  letter-spacing: 0;
}

.hero p { max-width: 760px; margin: 18px 0 0; color: var(--muted); }

.status {
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding: 14px;
  border: 1px solid var(--line);
  background: rgba(21, 20, 15, .82);
}

.field-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 18px;
  padding: 0 clamp(16px, 4vw, 42px) clamp(30px, 5vw, 64px);
}

.viewport-panel,
.panel,
.manual {
  border: 1px solid var(--line);
  background: rgba(15, 14, 10, .82);
}

.viewport-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: baseline;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.viewport-head h2 { margin: 0; font-size: 1rem; color: var(--text); }
.kicker { margin: 0; color: var(--green); }

.scene-shell {
  position: relative;
  min-height: min(68vh, 720px);
  overflow: hidden;
  background: #050604;
}

#walkerCanvas {
  display: block;
  width: 100%;
  height: min(68vh, 720px);
  min-height: 520px;
  cursor: crosshair;
  touch-action: none;
}

.mobile-note {
  position: absolute;
  left: 14px;
  bottom: 14px;
  display: none;
  max-width: 300px;
  padding: 10px 12px;
  border: 1px solid rgba(231, 191, 106, .32);
  background: rgba(8, 8, 6, .78);
  color: var(--muted);
  font-size: .72rem;
}

.mobile-note strong {
  display: block;
  color: var(--amber);
}

.control-stack { display: grid; gap: 14px; align-content: start; }

.panel { padding: 14px; }
.panel p { margin: 0 0 12px; color: var(--green); }

.button-grid {
  align-items: stretch;
  flex-direction: column;
  gap: 10px;
}

button {
  min-height: 42px;
  border: 1px solid rgba(149, 230, 160, .26);
  background: #0d120c;
  color: var(--text);
  cursor: pointer;
}

button:hover,
button.is-hot {
  border-color: var(--amber);
  background: #1b170e;
  color: var(--amber);
}

.readout-panel dl { display: grid; gap: 10px; margin: 0; }
.readout-panel div { display: flex; justify-content: space-between; gap: 12px; }
.readout-panel dt { color: var(--muted); }
.readout-panel dd { margin: 0; color: var(--text); text-align: right; }

.manual {
  margin: 0 clamp(16px, 4vw, 42px) clamp(34px, 5vw, 70px);
  padding: clamp(18px, 3vw, 30px);
}

.manual h2 { margin: 6px 0 20px; color: var(--text); font-size: clamp(1.4rem, 3vw, 2.5rem); }
.manual-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.manual h3 { margin: 0 0 8px; color: var(--amber); font-size: 1rem; }
.manual p { margin: 0; text-transform: none; }

.footer {
  justify-content: space-between;
  gap: 18px;
  padding: 22px clamp(16px, 4vw, 42px);
  border-top: 1px solid var(--line);
}

@media (max-width: 980px) {
  .hero,
  .field-layout,
  .manual-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 680px) {
  .walker-header,
  .footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero { padding-top: 26px; }
  .hero h1 { font-size: 2.45rem; }
  #walkerCanvas { min-height: 460px; }
  .control-stack { grid-template-columns: 1fr; }
  .mobile-note { display: block; }
}