:root {
  --bg: #0b0f14;
  --panel: #141a22;
  --panel-2: #1b232d;
  --border: #2a3441;
  --text: #e6edf3;
  --muted: #8b97a5;
  --accent: #00ff66;      /* ECAM-style green for target values */
  --amber: #ffbf00;       /* warnings */
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.page-head { margin-bottom: 24px; }
.back {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
}
.back:hover { color: var(--text); }
.page-head h1 { font-size: 1.6rem; font-weight: 700; margin: 8px 0 4px; }
.page-head .sub { color: var(--muted); margin: 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.panel__title { font-size: 0.95rem; font-weight: 600; margin: 0 0 16px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }
.field label { display: block; font-size: 0.9rem; margin-bottom: 6px; }
.field__row { display: flex; gap: 8px; }
.field__hint { margin: 6px 0 0; font-size: 0.75rem; color: var(--muted); line-height: 1.4; }

input[type="number"], input[type="text"], select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
  width: 100%;
}
input[type="number"]:focus, input[type="text"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}
.field__row select { width: auto; flex: 0 0 auto; }

.warnings { margin: 0 0 16px; }
.warnings .warn {
  background: rgba(255, 191, 0, 0.1);
  border: 1px solid var(--amber);
  color: var(--amber);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.results { display: grid; gap: 12px; }
@media (min-width: 640px) { .results { grid-template-columns: 1fr 1fr 1fr; } }

.result {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.result__label { font-size: 0.8rem; font-weight: 600; color: var(--muted); margin: 0 0 10px; text-transform: uppercase; letter-spacing: 0.03em; }
.result__value { margin: 0; font-size: 2.2rem; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.result__value .unit { font-size: 1.1rem; color: var(--muted); margin-left: 2px; }
.result__breakdown { margin: 8px 0 0; font-size: 0.75rem; color: var(--muted); line-height: 1.45; word-break: break-word; }

.reference { margin-top: 24px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); padding: 0 16px; }
.reference summary { cursor: pointer; padding: 14px 0; font-weight: 600; }
.reference__cite { color: var(--muted); font-size: 0.8rem; }
.reference__tablewrap { max-height: 360px; overflow: auto; margin-bottom: 16px; }
.reference__table { width: 100%; border-collapse: collapse; font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.reference__table th, .reference__table td { text-align: right; padding: 4px 10px; border-bottom: 1px solid var(--border); }
.reference__table th { position: sticky; top: 0; background: var(--panel-2); color: var(--muted); }

.foot { margin-top: 24px; color: var(--muted); font-size: 0.75rem; text-align: center; }

/* Hide native number-input spinners (not useful for these manual entries). */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; appearance: textfield; }