/* Reef Lab web tools — nur die Teile, die site.css nicht schon hat.
   Die Tool-Seiten laden site.css (Tokens, Nav, Bands, Cards, Buttons, Footer, Inputs)
   und legen das hier obendrauf. Reihenfolge im <head> beachten. */

/* ----- Nav ohne Anker-Sektionen: die Tool-Seiten verlinken echte Seiten ----- */
.nav.solid {
  background: rgba(1, 22, 39, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* ----- Kopf einer Tool-Seite ----- */
.tool-head {
  padding: 7.5rem 0 2.5rem;
  background:
    radial-gradient(800px 380px at 80% 0%, rgba(2, 132, 199, 0.28), transparent 55%),
    linear-gradient(180deg, #013456 0%, #002846 100%);
  color: #fff;
}
.tool-head h1 {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  margin: 0 0 0.7rem;
  max-width: 20ch;
}
.tool-head .lede {
  color: rgba(226, 239, 252, 0.78);
  font-size: 1.05rem;
  max-width: 46rem;
  margin: 0;
}

/* Brotkrumen: sichtbar und als BreadcrumbList ausgezeichnet. */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  font-size: 0.88rem;
  color: rgba(226, 239, 252, 0.6);
  margin-bottom: 1.1rem;
}
.crumbs a { color: rgba(226, 239, 252, 0.85); text-decoration: none; border-bottom: 1px solid rgba(125, 211, 252, 0.3); }
.crumbs a:hover { color: #fff; }
.crumbs span[aria-hidden] { opacity: 0.45; }

/* ----- Der Rechner selbst ----- */
.calc {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1.25rem;
  align-items: start;
  margin-top: -3.5rem;
  position: relative;
  z-index: 2;
}
.calc-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.calc-panel h2 { margin: 0 0 1.1rem; font-size: 1.25rem; letter-spacing: -0.025em; }

.field-grid { display: grid; gap: 0.9rem; }
.field-grid.two { grid-template-columns: 1fr 1fr; }

select {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 12px;
  padding: 0.8rem 0.95rem;
  background: #fff;
  color: var(--fg);
  font: inherit;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
select:hover { border-color: #94a8c4; }
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.15);
}

/* Zahl mit Einheit dahinter: die Einheit gehoert ans Feld, nicht ins Label. */
.with-unit { position: relative; }
.with-unit input { padding-right: 3.6rem; }
.with-unit .unit {
  position: absolute;
  right: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  pointer-events: none;
}

/* Segmentierter Umschalter fuer Einheiten (l/gal, PSU/SG, °C/°F). */
.seg {
  display: inline-flex;
  border: 1px solid #cbd5e1;
  border-radius: 999px;
  overflow: hidden;
  background: #f4f8fc;
}
.seg button {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  padding: 0.42rem 0.85rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.seg button:hover { color: var(--fg); }
.seg button[aria-pressed="true"] {
  background: var(--primary);
  color: #fff;
}
.seg-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.1rem;
}
.seg-row .seg-label { font-size: 0.9rem; font-weight: 600; color: var(--muted); }

/* ----- Ergebnis ----- */
.result {
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(2, 132, 199, 0.3), transparent 60%),
    linear-gradient(180deg, #013456 0%, #002846 100%);
  color: #fff;
  border-radius: var(--radius);
  padding: 1.6rem 1.5rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 5.5rem;
}
.result h2 { margin: 0 0 1rem; font-size: 1.1rem; color: rgba(226, 239, 252, 0.75); font-weight: 600; letter-spacing: 0.01em; }
.result-main {
  font-size: clamp(2.1rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: #fff;
}
.result-main .unit { font-size: 0.42em; font-weight: 650; color: #7dd3fc; margin-left: 0.3rem; letter-spacing: 0; }
.result-sub { margin-top: 0.4rem; color: rgba(226, 239, 252, 0.72); font-size: 0.97rem; }

.result-rows { margin-top: 1.2rem; display: grid; gap: 0.55rem; }
.result-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0.8rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.94rem;
}
.result-row dt { color: rgba(226, 239, 252, 0.7); margin: 0; }
.result-row dd { margin: 0; font-weight: 700; color: #fff; text-align: right; }

.result-hint {
  margin-top: 1.1rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(226, 239, 252, 0.85);
}
.result-hint.warn {
  background: rgba(249, 115, 22, 0.16);
  border-color: rgba(249, 115, 22, 0.4);
  color: #fed7aa;
}
.result-hint.bad {
  background: rgba(220, 38, 38, 0.18);
  border-color: rgba(220, 38, 38, 0.42);
  color: #fecaca;
}
.result-hint:empty { display: none; }

.result-cta {
  display: inline-flex;
  margin-top: 1.2rem;
  font-size: 0.92rem;
  font-weight: 650;
  color: #7dd3fc;
  text-decoration: none;
  border-bottom: 1px solid rgba(125, 211, 252, 0.4);
}
.result-cta:hover { color: #fff; border-bottom-color: rgba(255, 255, 255, 0.6); }

/* ----- Querverweise auf die anderen Rechner ----- */
.tool-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem;
  text-decoration: none;
  color: var(--fg);
  box-shadow: 0 10px 28px rgba(11, 18, 32, 0.05);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.25s ease;
}
.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 50px rgba(2, 40, 70, 0.14);
  border-color: #b7cce8;
}
.tool-card .icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 0.85rem;
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.12), rgba(13, 148, 136, 0.14));
  font-size: 1.15rem;
}
.tool-card h3 { margin: 0 0 0.35rem; font-size: 1.05rem; letter-spacing: -0.02em; }
.tool-card p { margin: 0; color: var(--muted); font-size: 0.93rem; }
.tool-card[aria-current="page"] {
  border-color: var(--primary);
  background: #f4f9fd;
}

/* ----- Abschluss-Banner zur App ----- */
.app-cta {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.7rem;
  box-shadow: var(--shadow);
}
.app-cta h2 { margin: 0 0 0.4rem; font-size: 1.4rem; letter-spacing: -0.03em; }
.app-cta p { margin: 0; color: var(--muted); }
.app-cta .cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }

/* ----- Rechenweg-Kasten ----- */
.formula {
  margin: 1.2rem 0;
  padding: 1rem 1.15rem;
  border-radius: 14px;
  background: #f4f8fc;
  border: 1px solid #d0dcf0;
  border-left: 3px solid var(--primary);
  font-size: 0.95rem;
  color: var(--fg);
  overflow-x: auto;
}
.formula code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.92em; }
.formula .caption { display: block; margin-top: 0.5rem; color: var(--muted); font-size: 0.88rem; }

@media (max-width: 900px) {
  .calc, .field-grid.two, .tool-cards, .app-cta { grid-template-columns: 1fr; }
  .calc { margin-top: -2rem; }
  .result { position: static; }
  .tool-head { padding: 6.5rem 0 3rem; }
}
