@charset "UTF-8";
/* GNSS-IR Water Level — editorial field-science aesthetic.
   Fraunces (display) · Public Sans (text) · IBM Plex Mono (instrument readouts). */

:root {
  --paper:    #f5f1e8;
  --paper-2:  #efe9db;
  --card:     #fffdf8;
  --ink:      #16282e;
  --ink-soft: #4d5d63;
  --sea:      #0b6e7d;
  --sea-deep: #064551;
  --gauge:    #c06a36;
  --line:     #ded5c2;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans:  "Public Sans", system-ui, sans-serif;
  --mono:  "IBM Plex Mono", ui-monospace, monospace;
  --maxw: 1080px;
  --shadow: 0 1px 2px rgba(22,40,46,.04), 0 8px 30px -16px rgba(22,40,46,.22);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 12% -10%, rgba(11,110,125,.10), transparent 55%),
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(11,110,125,.045) 38px 39px),
    linear-gradient(180deg, var(--paper-2), var(--paper));
}
.hero__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.6rem, 6vw, 4.6rem) 1.6rem clamp(2rem, 4vw, 3rem);
}
.kicker {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sea-deep);
  margin: 0 0 1.1rem;
}
.hero__title {
  font-family: var(--serif);
  font-weight: 500;
  font-optical-sizing: auto;
  font-size: clamp(2.1rem, 5.4vw, 3.75rem);
  line-height: 1.04;
  letter-spacing: -.015em;
  margin: 0 0 1.3rem;
  max-width: 18ch;
}
.hero__claim {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.05rem, 2.3vw, 1.4rem);
  line-height: 1.45;
  color: var(--sea-deep);
  margin: 0 0 .8rem;
  max-width: 42ch;
}
.hero__claim b { font-weight: 600; color: var(--ink); }
.hero__meta {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--ink-soft);
  margin: 0;
}

/* ---------- Layout ---------- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.6rem) 1.6rem 1rem;
  display: grid;
  gap: clamp(1.1rem, 2.6vw, 1.8rem);
}
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  box-shadow: var(--shadow);
}
.panel__head { margin-bottom: 1rem; }
.panel h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  letter-spacing: -.01em;
  margin: 0 0 .35rem;
}
.panel__cap { margin: 0; color: var(--ink-soft); font-size: .92rem; }

/* ---------- Chart ---------- */
#chart { width: 100%; }
.u-legend { font-family: var(--mono) !important; font-size: .78rem !important; }
.u-legend .u-marker { width: 14px; height: 3px; border-radius: 2px; }

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(.7rem, 1.6vw, 1.1rem);
}
.stat {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.1rem 1.15rem 1rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.stat::before {
  content: "";
  position: absolute; inset: 0 auto 0 0;
  width: 4px;
}
.stat--sea::before   { background: var(--sea); }
.stat--gauge::before { background: var(--gauge); }
.stat__k {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 .5rem;
}
.stat__v {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.6rem, 3.2vw, 2.1rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  margin: 0 0 .45rem;
}
.stat__sub { font-size: .78rem; color: var(--ink-soft); margin: 0; }

/* ---------- Map ---------- */
.map-wrap { position: relative; }
#map {
  height: clamp(300px, 42vw, 420px);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.legend {
  position: absolute; right: 12px; bottom: 12px;
  margin: 0; padding: .55rem .7rem; list-style: none;
  background: rgba(255,253,248,.94);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink);
  box-shadow: var(--shadow);
}
.legend li { display: flex; align-items: center; gap: .5rem; }
.legend li + li { margin-top: .3rem; }
.dot { width: 11px; height: 11px; border-radius: 50%; border: 2px solid #fff; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
.dot--gnss  { background: var(--sea); }
.dot--gauge { background: var(--gauge); }

/* ---------- Method + footer ---------- */
.method { padding: clamp(1.1rem,2.4vw,1.6rem) 0 0; }
.method h2 { font-family: var(--serif); font-weight: 500; font-size: 1.2rem; margin: 0 0 .4rem; }
.method p { margin: 0; color: var(--ink-soft); max-width: 70ch; }
.foot {
  max-width: var(--maxw);
  margin: clamp(2rem,5vw,3.5rem) auto 0;
  padding: 1.4rem 1.6rem 2.6rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--ink-soft);
}
.foot__brand { margin: 0 0 .35rem; color: var(--ink); }
.foot__src { margin: 0; line-height: 1.5; }
.error { font-family: var(--mono); color: var(--gauge); padding: 2rem 1.6rem; }

/* ---------- Reveal motion (CSS-only; ends visible even if animation is skipped) ---------- */
.reveal { animation: rise .7s cubic-bezier(.2,.7,.2,1) both; }
#chartPanel { animation-delay: .05s; }
#statsPanel { animation-delay: .16s; }
#mapPanel   { animation-delay: .27s; }
#notePanel  { animation-delay: .40s; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .br-desk { display: none; }
}
@media (max-width: 420px) {
  .stats { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; }
}
:focus-visible { outline: 2px solid var(--sea); outline-offset: 2px; }