:root {
  color-scheme: dark;
  --bg: #060709;
  --panel: #121510;
  --line: rgba(141, 216, 176, .24);
  --text: #f4eed8;
  --muted: #aaa884;
  --green: #8df0aa;
  --amber: #efbf6a;
  --blue: #77cde4;
  --red: #e36e58;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 50% -8%, rgba(119, 205, 228, .18), transparent 34%),
    radial-gradient(circle at 8% 8%, rgba(239, 191, 106, .1), transparent 28%),
    linear-gradient(90deg, rgba(141, 240, 170, .035) 1px, transparent 1px) 0 0 / 62px 62px,
    #060709;
  color: var(--text);
  font-family: ui-monospace, Consolas, "Noto Sans JP", monospace;
  line-height: 1.6;
}

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

.scale-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(6, 7, 9, .9);
  backdrop-filter: blur(14px);
}

.brand,
.scale-nav,
.status,
.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: #030405;
  color: var(--green);
}

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

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

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(250px, 380px);
  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(2.35rem, 5.7vw, 6rem);
  line-height: .92;
  letter-spacing: 0;
}

.hero p { max-width: 790px; 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(18, 21, 16, .82);
}

.observatory {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 18px;
  padding: 0 clamp(16px, 4vw, 42px) clamp(30px, 5vw, 64px);
}

.viewport-panel,
.panel,
.data-panel {
  border: 1px solid var(--line);
  background: rgba(12, 14, 13, .84);
}

.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: #030405;
}

#scaleCanvas {
  display: block;
  width: 100%;
  height: min(68vh, 720px);
  min-height: 540px;
  cursor: grab;
  touch-action: none;
}

#scaleCanvas:active { cursor: grabbing; }

.nav-overlay {
  position: absolute;
  right: 14px;
  bottom: 14px;
  display: none;
  width: min(230px, calc(100% - 28px));
  pointer-events: none;
}

.nav-overlay.is-visible { display: grid; gap: 8px; }

.direction-hud {
  padding: 8px 10px;
  border: 1px solid rgba(239, 191, 106, .36);
  background: rgba(6, 7, 9, .78);
  color: var(--amber);
  font-size: .7rem;
  line-height: 1.35;
}

#miniMap {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid rgba(141, 240, 170, .24);
  background: rgba(3, 4, 5, .7);
  cursor: crosshair;
  pointer-events: auto;
}

.mobile-note {
  position: absolute;
  left: 14px;
  bottom: 14px;
  display: none;
  max-width: 320px;
  padding: 10px 12px;
  border: 1px solid rgba(239, 191, 106, .34);
  background: rgba(6, 7, 9, .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,
.jump-grid {
  display: grid;
  gap: 10px;
}

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

button {
  min-height: 40px;
  border: 1px solid rgba(141, 240, 170, .26);
  background: #0a100d;
  color: var(--text);
  cursor: pointer;
}

button:hover,
button.is-hot {
  border-color: var(--amber);
  background: #18150d;
  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; }

.walk-panel {
  color: var(--muted);
  text-transform: none;
}

.key-help {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.speed-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.key-help span,
.key-help small {
  display: grid;
  place-items: center;
}

.key-help span {
  min-height: 34px;
  border: 1px solid rgba(141, 240, 170, .34);
  background: #070b09;
  color: var(--green);
  font-weight: 700;
}

.key-help small {
  color: var(--muted);
  font-size: .68rem;
}

.walk-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .74rem;
}

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

.data-panel h2 { margin: 6px 0 20px; color: var(--text); font-size: clamp(1.4rem, 3vw, 2.45rem); }
.note-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.note-grid h3 { margin: 0 0 8px; color: var(--amber); font-size: 1rem; }
.note-grid p { margin: 0 0 8px; 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: 1000px) {
  .hero,
  .observatory,
  .note-grid {
    grid-template-columns: 1fr;
  }

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

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

  .hero { padding-top: 26px; }
  .hero h1 { font-size: 2.25rem; }
  #scaleCanvas { min-height: 470px; }
  .control-stack { grid-template-columns: 1fr; }
  .mobile-note { display: block; }
}