:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --panel: #111827;
  --panel-soft: #1f2937;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --danger: #fb7185;
  --border: rgba(148, 163, 184, 0.2);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(180deg, #020617 0%, #0f172a 100%);
  color: var(--text);
}
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}
.hero { margin-bottom: 24px; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  font-size: 0.8rem;
}
h1 { font-size: clamp(2rem, 4vw, 3.5rem); margin: 0 0 12px; }
.subhead { max-width: 760px; color: var(--muted); line-height: 1.6; }
.card {
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px;
  box-shadow: 0 20px 50px rgba(0,0,0,.2);
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  align-items: end;
}
label span, .label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.92rem;
}
input, button {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  font-size: 1rem;
  padding: 14px 16px;
}
input {
  background: var(--panel-soft);
  color: var(--text);
}
button {
  cursor: pointer;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  font-weight: 700;
}
button:disabled { opacity: 0.7; cursor: wait; }
.hint, .muted { color: var(--muted); }
.status {
  min-height: 28px;
  margin: 16px 0;
  color: var(--muted);
}
.status.error { color: var(--danger); }
.hidden { display: none; }
.result-highlight {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.price-boxes {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.big-number {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin: 0;
  font-weight: 800;
}
.details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
dl { margin: 0; }
dl div { margin-bottom: 14px; }
dt { color: var(--muted); margin-bottom: 4px; }
dd { margin: 0; line-height: 1.45; }
@media (max-width: 640px) {
  .container { padding-top: 24px; }
}