:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --line: #334155;
  --up: #ef4444;     /* price up = bad for wallet = red */
  --down: #22c55e;   /* price down = good = green */
  --flat: #64748b;
  --accent: #38bdf8;
  --ron95: #22c55e;
  --ron97: #eab308;
  --diesel: #f97316;
  --radius: 14px;
  font-synthesis: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

.wrap { max-width: 1000px; margin: 0 auto; padding: 0 20px; }

.site-header {
  background: linear-gradient(160deg, #1e293b, #0f172a);
  border-bottom: 1px solid var(--line);
  padding: 28px 0 20px;
}
.site-header h1 { margin: 0; font-size: 1.6rem; }
.subtitle { margin: 4px 0 8px; color: var(--muted); }
.meta { margin: 0; color: var(--muted); font-size: 0.85rem; }
.meta a { color: var(--accent); }

.badge {
  display: inline-block; margin-left: 6px; padding: 1px 8px;
  border-radius: 999px; font-size: 0.72rem; font-weight: 600;
}
.badge.live { background: rgba(34,197,94,.15); color: #4ade80; }
.badge.cached { background: rgba(234,179,8,.15); color: #facc15; }

main { padding-bottom: 60px; }
section { margin-top: 34px; }
h2 { font-size: 1.15rem; margin: 0 0 14px; }
h2 small { color: var(--muted); font-weight: 400; font-size: 0.8rem; }

/* ---- Price cards ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.loading { color: var(--muted); }

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 4px solid var(--flat);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.card.ron95 { border-top-color: var(--ron95); }
.card.ron97 { border-top-color: var(--ron97); }
.card.diesel { border-top-color: var(--diesel); }

.card .fuel-name { font-weight: 700; font-size: 1.02rem; }
.card .tag {
  display: inline-block; font-size: 0.68rem; font-weight: 600;
  padding: 1px 7px; border-radius: 999px; margin-left: 6px; vertical-align: middle;
}
.tag.unsub { background: rgba(148,163,184,.18); color: #cbd5e1; }
.tag.sub { background: rgba(56,189,248,.18); color: #7dd3fc; }

.card .price {
  font-size: 1.9rem; font-weight: 800; margin: 8px 0 2px; letter-spacing: -.5px;
}
.card .price .cur { font-size: 0.95rem; font-weight: 600; color: var(--muted); margin-right: 4px; }
.card .per { font-size: 0.8rem; color: var(--muted); font-weight: 500; }

.change { font-size: 0.9rem; font-weight: 700; margin-top: 6px; display: flex; align-items: center; gap: 5px; }
.change.up { color: var(--up); }
.change.down { color: var(--down); }
.change.flat { color: var(--flat); }
.change .arrow { font-size: 1rem; }
.change .since { color: var(--muted); font-weight: 400; font-size: 0.78rem; }
.card .scheme-note { font-size: 0.72rem; color: var(--muted); margin-top: 8px; }

/* ---- Chart ---- */
.chart-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

/* ---- Calculator ---- */
.calc-section { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.calc { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; align-items: end; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label, .field .label { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
select, input[type="number"] {
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; font-size: 1rem; width: 100%;
}
select:focus, input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.price-preview .value { font-size: 1.05rem; font-weight: 700; padding-top: 2px; }

.result {
  margin-top: 22px; padding: 20px; border-radius: var(--radius);
  background: linear-gradient(135deg, #0ea5e9, #2563eb);
  color: #fff; display: flex; flex-direction: column; gap: 2px;
}
.result-label { font-size: 0.85rem; opacity: .9; }
.result-amount { font-size: 2.4rem; font-weight: 800; letter-spacing: -1px; }
.result-note { font-size: 0.82rem; opacity: .9; }

.site-footer { margin-top: 40px; color: var(--muted); font-size: 0.78rem; border-top: 1px solid var(--line); padding-top: 16px; }

@media (max-width: 520px) {
  .card .price { font-size: 1.6rem; }
  .result-amount { font-size: 2rem; }
}