/* =========================================================
Wärmebedarfs-Rechner – neutrales, modernes Design
Alle Selektoren sind unter .wbr gekapselt, damit die
Einbettung auf einer bestehenden Webseite keine Konflikte
mit vorhandenen Styles verursacht.
========================================================= */

.wbr {
  --wbr-bg: #ffffff;
  --wbr-surface: #f6f8fb;
  --wbr-surface-2: #eef2f7;
  --wbr-border: #d9e0ea;
  --wbr-text: #1f2937;
  --wbr-muted: #64748b;
  --wbr-primary: #2563eb;
  --wbr-primary-dark: #1d4ed8;
  --wbr-primary-soft: #e0ebff;
  --wbr-accent: #0f766e;
  --wbr-hint: #2563eb;
  --wbr-radius: 12px;
  --wbr-radius-sm: 8px;
  --wbr-shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 4px 16px rgba(15, 23, 42, .05);

  box-sizing: border-box;
  max-width: 820px;
  margin: 0 auto;
  padding: 24px;
  color: var(--wbr-text);
  background: var(--wbr-bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

.wbr *,
.wbr *::before,
.wbr *::after {
  box-sizing: border-box;
}

.wbr-header h1 {
  font-size: 1.9rem;
  font-weight: 700;
  margin: 0 0 .5rem;
  letter-spacing: -.01em;
}

.wbr-lead {
  color: var(--wbr-muted);
  margin: 0 0 1rem;
  font-size: .98rem;
}

.wbr-note {
  background: var(--wbr-surface-2);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius-sm);
  padding: .7rem .9rem;
  font-size: .85rem;
  color: var(--wbr-muted);
}

.wbr-note--info {
  background: var(--wbr-primary-soft);
  border-color: #bcd4ff;
  color: var(--wbr-primary-dark);
  margin-bottom: 1rem;
}

.wbr-guide {
  margin: 1.4rem 0;
  padding: 1rem 1.2rem;
  background: var(--wbr-surface);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius);
}

.wbr-guide h2 {
  font-size: 1.05rem;
  margin: 0 0 .6rem;
}

.wbr-guide ol {
  margin: 0;
  padding-left: 1.1rem;
}

.wbr-guide li {
  margin-bottom: .4rem;
  font-size: .92rem;
  color: #374151;
}

.wbr-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--wbr-border);
  margin: 1.6rem 0 0;
  flex-wrap: wrap;
}

.wbr-tab {
  appearance: none;
  border: none;
  background: transparent;
  padding: .75rem 1.1rem;
  font-size: .95rem;
  font-weight: 600;
  color: var(--wbr-muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color .15s, border-color .15s;
  font-family: inherit;
}

.wbr-tab:hover {
  color: var(--wbr-text);
}

.wbr-tab.is-active {
  color: var(--wbr-primary);
  border-bottom-color: var(--wbr-primary);
}

.wbr-panel {
  display: none;
  padding-top: 1.6rem;
}

.wbr-panel.is-active {
  display: block;
  animation: wbr-fade .2s ease;
}

@keyframes wbr-fade {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.wbr-panel-title {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 0 1.4rem;
}

.wbr-field {
  margin-bottom: 1.25rem;
}

.wbr-label {
  display: block;
  font-weight: 600;
  font-size: .95rem;
  margin-bottom: .5rem;
}

.wbr-sublabel {
  display: block;
  font-size: .85rem;
  font-weight: 500;
  color: var(--wbr-muted);
  margin-bottom: .3rem;
}

.wbr-hint {
  font-size: .82rem;
  color: var(--wbr-hint);
  margin: .4rem 0 0;
  line-height: 1.4;
}

.wbr-radio-group {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.wbr-radio-inline {
  flex-direction: row;
  gap: 1.4rem;
}

.wbr-radio,
.wbr-checkbox {
  display: flex;
  align-items: flex-start;
  gap: .55rem;
  font-size: .92rem;
  cursor: pointer;
  padding: .3rem .1rem;
  color: #374151;
}

.wbr-radio input,
.wbr-checkbox input {
  margin: .15rem 0 0;
  accent-color: var(--wbr-primary);
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
}

.wbr-input,
.wbr-select {
  width: 100%;
  padding: .6rem .75rem;
  font-size: .95rem;
  color: var(--wbr-text);
  background: #fff;
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius-sm);
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}

.wbr-input:focus,
.wbr-select:focus {
  outline: none;
  border-color: var(--wbr-primary);
  box-shadow: 0 0 0 3px var(--wbr-primary-soft);
}

.wbr-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748b' d='M6 8 0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .8rem center;
  padding-right: 2.2rem;
}

.wbr-input-unit {
  display: flex;
  align-items: stretch;
}

.wbr-input-unit .wbr-input {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.wbr-unit {
  display: flex;
  align-items: center;
  padding: 0 .8rem;
  background: var(--wbr-surface-2);
  border: 1px solid var(--wbr-border);
  border-left: none;
  border-top-right-radius: var(--wbr-radius-sm);
  border-bottom-right-radius: var(--wbr-radius-sm);
  font-size: .85rem;
  color: var(--wbr-muted);
  white-space: nowrap;
}

.wbr-eq {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 .8rem;
  background: var(--wbr-surface-2);
  border: 1px solid var(--wbr-border);
  border-right: none;
  border-top-left-radius: var(--wbr-radius-sm);
  border-bottom-left-radius: var(--wbr-radius-sm);
  font-weight: 700;
  color: var(--wbr-muted);
}

.wbr-method,
.wbr-subfield,
.wbr-ww-litertable,
.wbr-ww-wirkungsgrad,
.wbr-ww-zaehler,
.wbr-ww-solar,
.wbr-ww-jaz,
.wbr-ww-manuell,
.wbr-temp-block {
  display: none;
}

.wbr-method.is-shown,
.wbr-subfield.is-shown,
.wbr-ww-litertable.is-shown,
.wbr-ww-wirkungsgrad.is-shown,
.wbr-ww-zaehler.is-shown,
.wbr-ww-solar.is-shown,
.wbr-ww-jaz.is-shown,
.wbr-ww-manuell.is-shown,
.wbr-temp-block.is-shown {
  display: block;
}

.wbr-method.is-shown {
  padding: 1.2rem;
  margin: 1.2rem 0;
  background: var(--wbr-surface);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius);
}

.wbr-subfield.is-shown {
  margin-top: .4rem;
}

.wbr-temp-block.is-shown {
  padding: 1rem 1.2rem;
  background: var(--wbr-surface);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius);
}

.wbr-temp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: .4rem;
}

.wbr-ww-litertable.is-shown {
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
  background: var(--wbr-surface);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius);
}

.wbr-litergrid {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  margin: .8rem 0;
}

.wbr-literrow {
  display: grid;
  grid-template-columns: 1fr 160px;
  align-items: center;
  gap: .8rem;
}

.wbr-literlabel {
  font-size: .9rem;
  color: #374151;
}

.wbr-litersum {
  margin-top: .6rem;
  padding-top: .8rem;
  border-top: 1px dashed var(--wbr-border);
}

.wbr-result-box {
  margin-top: 1.6rem;
  padding: 1.2rem 1.4rem;
  background: linear-gradient(180deg, var(--wbr-primary-soft), #fff);
  border: 1px solid #bcd4ff;
  border-radius: var(--wbr-radius);
}

.wbr-result-box h3 {
  margin: 0 0 .9rem;
  font-size: 1.05rem;
}

.wbr-result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: .7rem;
}

.wbr-result-row:last-child {
  margin-bottom: 0;
}

.wbr-result-label {
  font-size: .92rem;
  font-weight: 500;
  flex: 1 1 240px;
}

.wbr-result {
  flex: 0 0 auto;
  min-width: 200px;
}

.wbr-result output {
  flex: 1;
  display: flex;
  align-items: center;
  padding: .6rem .8rem;
  background: #fff;
  border: 1px solid var(--wbr-border);
  font-weight: 700;
  font-size: 1rem;
  min-width: 90px;
  justify-content: flex-end;
}

.wbr-deduction {
  margin-top: 1.4rem;
  padding: 1rem 1.2rem;
  background: var(--wbr-surface-2);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius);
}

.wbr-deduction h3 {
  margin: 0 0 .6rem;
  font-size: 1rem;
}

.wbr-deduction ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: .9rem;
}

.wbr-deduction li {
  margin-bottom: .3rem;
}

.wbr-final {
  margin-top: 1.6rem;
}

.wbr-final > h3 {
  font-size: 1.2rem;
  text-align: center;
  margin: 0 0 1.2rem;
}

.wbr-final-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.wbr-final-card {
  padding: 1rem 1.1rem;
  background: var(--wbr-surface);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius);
}

.wbr-final-card--sum {
  grid-column: 1 / -1;
  background: linear-gradient(180deg, #e6faf5, #fff);
  border-color: #9ee0d3;
}

.wbr-final-title {
  display: block;
  font-size: .88rem;
  font-weight: 600;
  color: var(--wbr-muted);
  margin-bottom: .6rem;
}

.wbr-final-card--sum .wbr-final-title {
  color: var(--wbr-accent);
}

.wbr-ergebnis-strombox {
  margin-top: 3rem;
  padding: 1.4rem 1.4rem 1.6rem;
  background: var(--wbr-surface);
  border: 1px solid var(--wbr-border);
  border-radius: var(--wbr-radius);
  box-shadow: var(--wbr-shadow);
}

.wbr-ergebnis-strombox .wbr-field:last-child {
  margin-bottom: 0;
}

.wbr-final--strom {
  margin-top: 1.4rem;
}

.wbr-final--strom .wbr-final-grid {
  grid-template-columns: 1fr;
}

.wbr-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--wbr-border);
  font-size: .8rem;
  color: var(--wbr-muted);
  text-align: center;
}

@media (max-width: 620px) {
  .wbr {
    padding: 16px;
  }

  .wbr-final-grid {
    grid-template-columns: 1fr;
  }

  .wbr-temp-grid {
    grid-template-columns: 1fr;
  }

  .wbr-literrow {
    grid-template-columns: 1fr;
    gap: .3rem;
  }

  .wbr-literrow .wbr-input {
    max-width: 200px;
  }

  .wbr-result-row {
    flex-direction: column;
    align-items: stretch;
  }

  .wbr-result {
    min-width: 0;
  }

  .wbr-tab {
    flex: 1 1 auto;
    text-align: center;
    padding: .7rem .4rem;
  }

  .wbr-ergebnis-strombox {
    margin-top: 2.2rem;
    padding: 1.1rem;
  }
}