/* ==========================================================================
   Butterfly OS — Einsparrechner (Website-Fassung)
   Nutzt die Site-Tokens, wenn vorhanden (var(--x, Fallback)). Kein Framework.
   ========================================================================== */
.calc {
  --c-surface: var(--surface, #FFFFFF);
  --c-ground: var(--ground, #F3F6F8);
  --c-line: var(--line, #E0E6EA);
  --c-text: var(--text, #0F1B24);
  --c-text-3: var(--text-3, #4C5C67);
  --c-accent: var(--accent, #2A83B0);
  --c-accent-strong: var(--accent-strong, #1F6E96);
  --c-accent-tint: var(--accent-tint, #EEF6FA);
  --c-classic: #8A99A3;
  --c-mono: var(--font-mono, "IBM Plex Mono", ui-monospace, Menlo, monospace);
  --c-display: var(--font-display, "Schibsted Grotesk", "Helvetica Neue", sans-serif);

  display: grid; gap: 24px;
  grid-template-columns: minmax(0, 1fr);
  color: var(--c-text);
}
@media (min-width: 960px) { .calc { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; } }

.calc__panel { min-width: 0; background: var(--c-surface); border: 1px solid var(--c-line); border-radius: 16px; padding: 24px; display: flex; flex-direction: column; gap: 18px; }
.calc__panel--result { background: var(--c-accent-tint); border-color: var(--c-accent); }
.calc__title { font-family: var(--c-display); font-weight: 700; font-size: 1.05rem; margin: 0; }

/* Regler */
.calc__field { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; align-items: baseline; }
.calc__field label { font-size: 0.95rem; min-width: 0; }
.calc__field output { font-family: var(--c-mono); font-weight: 500; font-variant-numeric: tabular-nums; white-space: nowrap; }
.calc__field input[type="range"] { grid-column: 1 / -1; width: 100%; accent-color: var(--c-accent); margin: 0; }
.calc__check { display: flex; gap: 10px; align-items: flex-start; font-size: 0.95rem; }
.calc__check input { width: 18px; height: 18px; margin-top: 3px; flex: none; accent-color: var(--c-accent); }
.calc__check small { display: block; color: var(--c-text-3); font-size: 0.85rem; }

/* Alle Annahmen */
.calc__adv { border-top: 1px solid var(--c-line); padding-top: 14px; }
.calc__adv summary { cursor: pointer; font-weight: 600; font-size: 0.95rem; color: var(--c-accent-strong); }
.calc__adv-group { font-family: var(--c-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-text-3); margin: 16px 0 4px; }
.calc__adv-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: center; padding-block: 7px; border-top: 1px solid var(--c-line); font-size: 0.9rem; }
.calc__adv-row label { min-width: 0; }
.calc__adv-ctl { display: flex; align-items: center; gap: 6px; }
.calc__adv-ctl input { width: 5rem; padding: 6px 8px; text-align: right; font: 500 0.9rem var(--c-mono); font-variant-numeric: tabular-nums; color: var(--c-text); background: var(--c-ground); border: 1px solid var(--c-line); border-radius: 8px; }
.calc__adv-ctl span { font-family: var(--c-mono); font-size: 12px; color: var(--c-text-3); min-width: 2.4rem; }
.calc__reset { align-self: flex-start; margin-top: 12px; background: none; border: 0; padding: 0; font: inherit; font-size: 0.88rem; color: var(--c-accent-strong); text-decoration: underline; cursor: pointer; }

/* Ergebnis */
.calc__big { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 20px; }
.calc__big-num { font-family: var(--c-display); font-weight: 800; font-size: clamp(2.4rem, 1.6rem + 3.2vw, 3.5rem); line-height: 1; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; color: var(--c-accent-strong); }
.calc__big-cap { color: var(--c-text-3); font-size: 0.95rem; }
.calc__rows { display: flex; flex-direction: column; gap: 14px; }
.calc__row { display: grid; grid-template-columns: minmax(0, 1fr); gap: 6px; }
.calc__row-head { display: flex; justify-content: space-between; gap: 12px; font-size: 0.95rem; }
.calc__row-head strong { font-weight: 600; }
.calc__row-val { font-family: var(--c-mono); font-size: 0.88rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.calc__track { height: 14px; border-radius: 7px; background: var(--c-surface); border: 1px solid var(--c-line); overflow: hidden; }
.calc__fill { height: 100%; min-width: 2px; transition: width 0.25s ease; }
.calc__fill--classic { background: var(--c-classic); }
.calc__fill--bf { background: var(--c-accent); }
.calc__sentence { margin: 0; font-size: 0.98rem; }
.calc__note { margin: 0; font-size: 0.85rem; color: var(--c-text-3); }
.calc input:focus-visible, .calc summary:focus-visible, .calc button:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { .calc__fill { transition: none; } }