/* ============================================================
   ERSPARNIS-RECHNER — /ersparnis-rechner.html
   Eingabe-Panel (Slider) links, Live-Ergebnis rechts.
   Rechnet client-seitig (assets/calculator.js); das Gate-Formular
   sendet an /api/report (Vercel-Function → Resend).
   ============================================================ */

.calc { padding: 40px 20px 64px; }
.calc__grid {
  display: grid; grid-template-columns: 1fr; gap: 24px;
  max-width: 1080px; margin: 0 auto;
}

/* ─── Eingabe-Panel ───────────────────────────────────────── */
.calc__panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r3); padding: 26px 24px; box-shadow: var(--sh);
}
.calc__panel h2 { font-size: 17px; margin: 0 0 18px; }

.calc__field { margin-bottom: 20px; }
.calc__field:last-child { margin-bottom: 0; }
.calc__label {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px; margin-bottom: 8px;
  font-size: 14px; font-weight: 600; color: var(--text);
}
.calc__value {
  font-variant-numeric: tabular-nums; white-space: nowrap;
  color: var(--accent); font-weight: 700;
}
.calc__hint { font-size: 12px; color: var(--text3); margin: 6px 0 0; }

.calc input[type="range"] {
  width: 100%; height: 28px; margin: 0;
  -webkit-appearance: none; appearance: none; background: transparent;
  cursor: pointer;
}
.calc input[type="range"]::-webkit-slider-runnable-track {
  height: 6px; border-radius: var(--pill);
  background: linear-gradient(to right,
    var(--accent) 0%, var(--accent) var(--fill, 50%),
    var(--surface3) var(--fill, 50%), var(--surface3) 100%);
}
.calc input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px; margin-top: -7px;
  border-radius: 50%; background: #fff;
  border: 2px solid var(--accent); box-shadow: var(--sh-sm);
}
.calc input[type="range"]::-moz-range-track {
  height: 6px; border-radius: var(--pill); background: var(--surface3);
}
.calc input[type="range"]::-moz-range-progress {
  height: 6px; border-radius: var(--pill); background: var(--accent);
}
.calc input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 2px solid var(--accent); box-shadow: var(--sh-sm);
}
.calc input[type="range"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: var(--r); }

/* Pill-Toggles (Kapazitäts-Verwendung, Tarif) — Optik wie .pr__toggle */
.calc__toggle {
  display: flex; border: 1px solid var(--border); border-radius: var(--pill);
  padding: 3px; background: var(--surface2); margin: 0; gap: 2px;
}
.calc__toggle legend {
  font-size: 14px; font-weight: 600; color: var(--text);
  padding: 0; margin-bottom: 8px;
}
.calc__toggle label { flex: 1; }
.calc__toggle input { position: absolute; opacity: 0; pointer-events: none; }
.calc__toggle span {
  display: block; text-align: center; padding: 8px 10px;
  border-radius: var(--pill); font-size: 13px; font-weight: 600;
  color: var(--text2); cursor: pointer; transition: background .15s, color .15s;
}
.calc__toggle input:checked + span { background: #fff; color: var(--accent); box-shadow: var(--sh-sm); }
.calc__toggle input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.calc__fieldset { border: 0; padding: 0; margin: 0 0 20px; }
.calc__fieldset:last-child { margin-bottom: 0; }

/* ─── Ergebnis-Spalte ─────────────────────────────────────── */
.calc__results { display: flex; flex-direction: column; gap: 14px; }

.calc__summary {
  background: linear-gradient(135deg, var(--accent) 0%, #3d5fc5 100%);
  color: #fff; border-radius: var(--r3); padding: 24px;
  box-shadow: var(--sh-accent);
}
.calc__summary-label { font-size: 13px; font-weight: 600; opacity: .85; }
.calc__summary-num {
  display: block; font-size: clamp(30px, 5vw, 40px); font-weight: 800;
  letter-spacing: -.02em; line-height: 1.1; margin: 4px 0 10px;
  font-variant-numeric: tabular-nums;
}
.calc__summary-rows { font-size: 13.5px; display: grid; gap: 4px; opacity: .95; }
.calc__summary-rows div { display: flex; justify-content: space-between; gap: 12px; }
.calc__summary-rows strong { font-variant-numeric: tabular-nums; }
.calc__roi {
  margin-top: 12px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,.25);
  font-size: 13.5px; font-weight: 600;
}
/* Ehrlichkeits-Variante bei knappem Business Case (ROI < 1,5) */
.calc__summary--tight { background: var(--surface); color: var(--text); border: 1px solid var(--border); box-shadow: var(--sh); }
.calc__summary--tight .calc__roi { border-top-color: var(--border); color: var(--text2); }

.calc__card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r2); padding: 16px 18px; box-shadow: var(--sh-sm);
}
.calc__card-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
}
.calc__card-head b { font-size: 14px; }
.calc__card-num { font-size: 18px; font-weight: 800; color: var(--green); white-space: nowrap; font-variant-numeric: tabular-nums; }
.calc__card-num--neutral { color: var(--text); }
.calc__card p { font-size: 12.5px; color: var(--text3); margin: 6px 0 0; line-height: 1.5; }

.calc__revenue {
  border-left: 3px solid var(--amber);
}

/* ─── Mini-Gate in der Ergebnis-Spalte ────────────────────────
   Sticky neben den Slidern (Desktop) — der einzige E-Mail-Abgriff
   der Seite. Bewusst GRÜN (Ergebnis konservieren) und damit visuell
   getrennt vom blauen, persönlichen Demo-Pfad (.calc__founder) —
   die beiden sollen nicht wie konkurrierende Buttons wirken.
   Die Zeile trägt die live berechnete Netto-Zahl (#miniNet). */
.calc-mini-gate {
  background: var(--green-tint);
  border: 1px solid rgba(5,150,105,.30);
  border-radius: var(--r2); padding: 14px 16px;
}
.calc-mini-gate__line { font-size: 13.5px; color: var(--text2); margin: 0 0 10px; line-height: 1.5; }
.calc-mini-gate__line b { color: var(--text); font-variant-numeric: tabular-nums; }
.calc-mini-gate__row { display: flex; gap: 8px; }
.calc-mini-gate__row input {
  flex: 1; min-width: 0; padding: 10px 12px; font: inherit; font-size: 14px;
  border: 1px solid var(--border); border-radius: var(--r);
  background: #fff; color: var(--text);
}
.calc-mini-gate__row input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.calc-mini-gate__row .btn { white-space: nowrap; }
.calc-mini-gate__btn { background: var(--green); color: #fff; }
.calc-mini-gate__btn:hover { background: #047857; color: #fff; }
.calc-mini-gate__privacy { font-size: 11px; color: var(--text3); margin: 8px 0 0; }
.calc-mini-gate__privacy a { color: inherit; }
.calc-mini-gate .calc-gate__msg { margin-top: 8px; }
.calc-mini-gate .calc-gate__msg:empty { display: none; }

/* Engagement-Nudge: dezenter Doppel-Puls nach Eingaben + Idle (setzt JS) */
@keyframes calcGatePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(5,150,105,0); }
  40%      { box-shadow: 0 0 0 6px rgba(5,150,105,.25); }
}
.calc-mini-gate--pulse { animation: calcGatePulse 1.1s ease 2; }
@media (prefers-reduced-motion: reduce) {
  .calc-mini-gate--pulse { animation: none; border-color: var(--green); }
}
@media (max-width: 420px) {
  .calc-mini-gate__row { flex-direction: column; }
}

/* Honeypot: für Menschen unsichtbar, für Bots ein normales Feld */
.calc-gate__hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.calc-gate__msg { font-size: 14px; font-weight: 600; margin: 10px 0 0; }
.calc-gate__msg--ok { color: var(--green); }
.calc-gate__msg--err { color: var(--red); }

/* ─── Demo-Pfad: persönliche Founder-Karte ────────────────────
   Blau + Gesicht = Gespräch; bewusst anderes Vokabular als das
   grüne Report-Gate darüber. */
.calc__founder {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r2); padding: 14px 16px; box-shadow: var(--sh-sm);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.calc__founder img { border-radius: 50%; display: block; flex-shrink: 0; }
.calc__founder-copy { flex: 1; min-width: 160px; }
.calc__founder-copy b { display: block; font-size: 14.5px; }
.calc__founder-copy span { font-size: 12.5px; color: var(--text3); line-height: 1.45; display: block; margin-top: 2px; }
.calc__founder .btn { white-space: nowrap; }

/* ─── "So rechnen wir" ────────────────────────────────────── */
.calc-notes { padding: 0 20px 72px; }
.calc-notes__inner { max-width: 760px; margin: 0 auto; }
.calc-notes details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r2); padding: 16px 20px;
}
.calc-notes summary { font-weight: 700; font-size: 15px; cursor: pointer; }
.calc-notes table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 13.5px; }
.calc-notes th, .calc-notes td {
  text-align: left; padding: 8px 10px 8px 0; vertical-align: top;
  border-bottom: 1px solid var(--border); color: var(--text2);
}
.calc-notes th { color: var(--text); font-weight: 600; white-space: nowrap; padding-right: 16px; }
.calc-notes tr:last-child th, .calc-notes tr:last-child td { border-bottom: 0; }
.calc-notes__foot { font-size: 12px; color: var(--text3); margin-top: 12px; font-style: italic; }

/* ─── Responsive ──────────────────────────────────────────── */
@media (min-width: 860px) {
  .calc { padding: 48px 24px 80px; }
  .calc__grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: start; }
  .calc__results { position: sticky; top: 76px; }
  .calc-gate__row { grid-template-columns: 1fr 1fr; }
}