:root {
  --bg: #0e1116;
  --panel: #171c24;
  --panel-2: #1f2630;
  --ink: #e6edf3;
  --muted: #8b97a6;
  --accent: #4f9cf9;
  --accent-2: #2ea043;
  --warn: #d29922;
  --line: #2a323c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

header {
  padding: 28px 32px 16px;
  border-bottom: 1px solid var(--line);
}

header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

header h1 span {
  color: var(--muted);
  font-weight: 400;
  margin-left: 8px;
}

.sub { color: var(--muted); margin: 6px 0 0; font-size: 14px; }

main, body > section, body > footer { padding-left: 32px; padding-right: 32px; }

.grid {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(280px, 1fr);
  gap: 20px;
  padding: 24px 32px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  padding: 0 32px 24px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
}

.card h2 {
  margin: 0 0 14px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--muted);
  font-weight: 600;
}

form .row { display: flex; gap: 12px; flex-wrap: wrap; }
form label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--muted); flex: 1 1 0; min-width: 70px; }
fieldset.bases {
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 14px 0;
  padding: 10px 12px;
}
fieldset.bases legend { color: var(--muted); font-size: 13px; padding: 0 6px; }
fieldset.bases label { flex-direction: row; align-items: center; gap: 6px; color: var(--ink); display: inline-flex; margin-right: 14px; }

input, select {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  padding: 7px 9px;
  font-size: 14px;
  width: 100%;
}
input[type="checkbox"] { width: auto; }

button {
  margin-top: 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.1); }

.result .big {
  font-size: 52px;
  font-weight: 700;
  color: var(--accent-2);
  line-height: 1.1;
}
.result .big-sub { color: var(--muted); margin: 2px 0 16px; }

.prices { width: 100%; border-collapse: collapse; }
.prices th { text-align: left; color: var(--muted); font-weight: 500; padding: 5px 0; }
.prices td { padding: 5px 0; }
.prices td.muted { color: var(--muted); }

.metric { font-size: 26px; font-weight: 700; margin: 4px 0; }
.note { color: var(--muted); font-size: 12px; margin: 6px 0 0; }

.badge {
  display: inline-block;
  margin-top: 12px;
  background: rgba(210, 153, 34, 0.15);
  color: var(--warn);
  border: 1px solid rgba(210, 153, 34, 0.4);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
}

.metrics { width: 100%; border-collapse: collapse; margin-top: 4px; }
.metrics th, .metrics td { text-align: right; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.metrics th:first-child { text-align: left; }
.metrics tr:first-child th { color: var(--muted); font-weight: 500; font-size: 12px; }

.warn { border-color: rgba(210, 153, 34, 0.5); }
.warn pre {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  overflow-x: auto;
  font-size: 13px;
}

footer { color: var(--muted); font-size: 12px; padding: 24px 32px 40px; border-top: 1px solid var(--line); margin-top: 8px; }

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
}