:root {
  color-scheme: light dark;
  /* Cool-biased neutrals for a navigational instrument */
  --bg: #0a0d14;
  --bg-2: #0e131d;
  --ink: #eef2f8;
  --ink-dim: #8792a6;
  --ink-faint: #4a5468;
  --hair: rgba(148, 163, 184, 0.16);
  --ring: rgba(148, 163, 184, 0.28);
  --brass: #e0a850;
  --brass-soft: rgba(224, 168, 80, 0.14);
  --north: #ff5d4a;
  --steel: #6b7789;
  --card: rgba(255, 255, 255, 0.03);
  --card-brd: rgba(148, 163, 184, 0.14);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #eef1f6;
    --bg-2: #e4e9f1;
    --ink: #131822;
    --ink-dim: #55617a;
    --ink-faint: #97a1b5;
    --hair: rgba(60, 72, 96, 0.14);
    --ring: rgba(60, 72, 96, 0.26);
    --brass: #b07617;
    --brass-soft: rgba(176, 118, 23, 0.12);
    --north: #e23b2a;
    --steel: #8794a8;
    --card: rgba(19, 24, 34, 0.02);
    --card-brd: rgba(60, 72, 96, 0.14);
  }
}

:root[data-theme="dark"] {
  --bg: #0a0d14; --bg-2: #0e131d; --ink: #eef2f8; --ink-dim: #8792a6; --ink-faint: #4a5468;
  --hair: rgba(148, 163, 184, 0.16); --ring: rgba(148, 163, 184, 0.28);
  --brass: #e0a850; --brass-soft: rgba(224, 168, 80, 0.14); --north: #ff5d4a; --steel: #6b7789;
  --card: rgba(255, 255, 255, 0.03); --card-brd: rgba(148, 163, 184, 0.14);
}
:root[data-theme="light"] {
  --bg: #eef1f6; --bg-2: #e4e9f1; --ink: #131822; --ink-dim: #55617a; --ink-faint: #97a1b5;
  --hair: rgba(60, 72, 96, 0.14); --ring: rgba(60, 72, 96, 0.26);
  --brass: #b07617; --brass-soft: rgba(176, 118, 23, 0.12); --north: #e23b2a; --steel: #8794a8;
  --card: rgba(19, 24, 34, 0.02); --card-brd: rgba(60, 72, 96, 0.14);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: radial-gradient(120% 90% at 50% -10%, var(--bg-2), var(--bg) 60%);
  background-attachment: fixed;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
}

.mono {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  font-variant-numeric: tabular-nums;
}

.app {
  width: 100%;
  max-width: 460px;
  padding: max(22px, env(safe-area-inset-top)) 20px calc(20px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 100dvh;
}

/* Top bar */
.topbar { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: baseline; gap: 9px; }
.brand .mark {
  font-size: 12px; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--ink-dim); font-weight: 600;
}
.brand .tag { font-size: 11px; color: var(--ink-faint); letter-spacing: 0.04em; }
.ghost-btn {
  appearance: none; background: none; border: 1px solid var(--card-brd);
  color: var(--ink-dim); width: 34px; height: 34px; border-radius: 10px;
  font-size: 15px; cursor: pointer; line-height: 1; display: grid; place-items: center;
}
.ghost-btn:hover { color: var(--ink); border-color: var(--ring); }
.ghost-btn:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }

/* Heading readout */
.readout { text-align: center; display: flex; flex-direction: column; align-items: center; gap: 2px; }
.heading {
  font-size: clamp(58px, 20vw, 78px); line-height: 0.9; font-weight: 500;
  letter-spacing: -0.02em; color: var(--ink);
}
.heading .deg { color: var(--ink-faint); font-weight: 300; }
.cardinal {
  font-size: 15px; letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--brass); font-weight: 600; padding-left: 0.42em;
}

/* Compass */
.dial-wrap {
  position: relative; align-self: center;
  width: min(78vw, 340px); aspect-ratio: 1; margin: 2px 0;
}
.lubber {
  position: absolute; top: -3px; left: 50%; transform: translateX(-50%);
  width: 0; height: 0;
  border-left: 8px solid transparent; border-right: 8px solid transparent;
  border-top: 13px solid var(--brass); z-index: 4;
  filter: drop-shadow(0 0 6px color-mix(in srgb, var(--brass) 45%, transparent));
}
svg.dial { width: 100%; height: 100%; display: block; overflow: visible; }
.rose, #needle { will-change: transform; }

.hint {
  text-align: center; font-size: 12px; color: var(--ink-faint);
  letter-spacing: 0.02em; margin: -6px 0 0;
}

/* Coordinates */
.coords { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.cell {
  background: var(--card); border: 1px solid var(--card-brd); border-radius: 14px;
  padding: 13px 15px; display: flex; flex-direction: column; gap: 5px; min-width: 0;
}
.cell .label {
  font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ink-dim); font-weight: 600;
}
.cell .val { font-size: 21px; color: var(--ink); font-weight: 500; }
.cell .val small { font-size: 12px; color: var(--ink-faint); font-weight: 400; }
.cell.wide { grid-column: 1 / -1; flex-direction: row; align-items: center; justify-content: space-between; gap: 12px; }
.meta-row { display: flex; gap: 18px; }
.meta-row .m { display: flex; flex-direction: column; gap: 3px; }
.meta-row .m .label { font-size: 9px; }
.meta-row .m .val { font-size: 14px; }

/* Enable button + status */
.enable-btn {
  appearance: none; align-self: stretch; cursor: pointer;
  background: var(--brass-soft); color: var(--brass);
  border: 1px solid color-mix(in srgb, var(--brass) 34%, transparent);
  border-radius: 14px; padding: 14px; font-size: 15px; font-weight: 600;
  letter-spacing: 0.02em;
}
.enable-btn:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }

.footnote {
  text-align: center; font-size: 11px; color: var(--ink-faint);
  line-height: 1.5; margin: 0;
}
.footnote.error { color: var(--north); }

@media (prefers-reduced-motion: reduce) {
  .rose, #needle { transition: none !important; }
}