:root {
  --petrol: #1b56ad;
  --petrol-mid: #6f9bd6;
  --petrol-light: #bdd2ec;
  --olive: #0e7a43;
  --clay: #d98e12;
  --bad: #a92433;
  --ink: #1c1e26;
  --ink2: #494e5c;
  --ink3: #818697;
  --rule: #c9cdd8;
  --grid: #e9ebf1;
  --wash: #f3f4f8;
  --surface: #ffffff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.55;
}

#topnav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.4rem;
  padding: 0 4vw;
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--grid);
}
#topnav .brand { font-weight: 700; color: var(--petrol); margin-right: 1rem; }
#topnav .tabs { display: flex; gap: .2rem; flex-wrap: wrap; }
#topnav a {
  color: var(--ink2); text-decoration: none; font-size: .92rem;
  padding: .85rem .9rem .7rem;
  border-bottom: 3px solid transparent;
}
#topnav a:hover { color: var(--petrol); }
#topnav a.active {
  color: var(--petrol); font-weight: 600;
  border-bottom-color: var(--petrol);
}
#topnav a.cta { color: var(--olive); font-weight: 600; }
#topnav a.cta.active { color: var(--olive); border-bottom-color: var(--olive); }

main .view { display: none; }
main .view.active { display: block; animation: fadein .25s ease; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }

.hero {
  padding: 4rem 6vw 3rem;
  background: linear-gradient(180deg, var(--wash), #fff);
}

.finding-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem; padding: 1.6rem 6vw 3rem;
}
.finding {
  display: block; text-decoration: none; color: inherit;
  border: 1px solid var(--grid); border-radius: 12px; padding: 1.1rem 1.2rem;
  transition: border-color .15s, box-shadow .15s;
}
.finding:hover {
  border-color: var(--petrol-mid);
  box-shadow: 0 4px 14px rgba(27, 86, 173, .08);
}
.finding h3 { color: var(--petrol); font-size: 1.02rem; margin-bottom: .35rem; }
.finding p { color: var(--ink2); font-size: .88rem; }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.7rem); line-height: 1.18; }
.hero .sub { margin-top: 1rem; max-width: 46rem; color: var(--ink2); font-size: 1.06rem; }
.stats { display: flex; flex-wrap: wrap; gap: 2.6rem; margin-top: 2.2rem; }
.stat .num { font-size: 2rem; font-weight: 700; color: var(--petrol); }
.stat .lbl { font-size: .85rem; color: var(--ink3); max-width: 11rem; }

section { padding: 2.4rem 4vw 3rem; }
section h2 { font-size: 1.5rem; margin-bottom: .6rem; }
.lede { color: var(--ink2); max-width: 50rem; margin-bottom: 1.4rem; }
.note { color: var(--ink3); font-size: .85rem; margin-top: .9rem; max-width: 50rem; }

.controls { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.controls button {
  border: 1px solid var(--rule); background: #fff; color: var(--ink2);
  padding: .38rem .95rem; border-radius: 999px; cursor: pointer; font-size: .88rem;
}
.controls button:hover { border-color: var(--petrol-mid); color: var(--petrol); }
.controls button.active {
  background: var(--petrol); border-color: var(--petrol); color: #fff;
}

.chart { width: 100%; height: 460px; }
.chart.tall { height: 560px; }
.chart.short { height: 220px; margin-top: .6rem; }

.map-wrap { display: grid; grid-template-columns: 1fr 300px; gap: 1.2rem; }
#country-card {
  border: 1px solid var(--grid); border-radius: 12px;
  padding: 1.1rem; background: var(--wash);
  align-self: start; font-size: .9rem;
}
#country-card .hint { color: var(--ink3); }
#country-card h3 { margin-bottom: .3rem; }
#country-card .status-pill {
  display: inline-block; padding: .12rem .6rem; border-radius: 999px;
  color: #fff; font-size: .78rem; margin-bottom: .7rem;
}
#country-card dl { display: grid; grid-template-columns: auto auto; gap: .18rem .8rem; }
#country-card dt { color: var(--ink3); }
#country-card dd { text-align: right; font-variant-numeric: tabular-nums; }
#country-card .streams { margin-top: .7rem; display: flex; flex-wrap: wrap; gap: .3rem; }
#country-card .streams span {
  font-size: .74rem; padding: .1rem .5rem; border-radius: 999px;
  background: var(--petrol-light); color: var(--ink);
}
#country-card .streams span.off { background: var(--grid); color: var(--ink3); }

.tool-grid { display: grid; grid-template-columns: 320px 1fr; gap: 1.6rem; }
#tool select {
  width: 100%; padding: .5rem .6rem; font-size: .95rem;
  border: 1px solid var(--rule); border-radius: 8px; margin: .4rem 0 1rem;
}
#tool label { font-size: .85rem; color: var(--ink3); }
.tool-card {
  border: 1px solid var(--grid); border-left: 4px solid var(--rule);
  border-radius: 8px; padding: .7rem .9rem; margin-bottom: .7rem; font-size: .9rem;
}
.tool-card.ok { border-left-color: var(--olive); }
.tool-card.warn { border-left-color: var(--clay); }
.tool-card.bad { border-left-color: var(--bad); }
.tool-card .big { font-size: 1.25rem; font-weight: 700; }

@media (max-width: 900px) {
  .map-wrap, .tool-grid { grid-template-columns: 1fr; }
  #topnav { padding: 0 2vw; }
  #topnav a { padding: .7rem .55rem .55rem; font-size: .84rem; }
}