:root {
  --bg: #f3f6fa;
  --card: #ffffff;
  --text: #18202a;
  --muted: #4b5563;
  --border: #d4dbe5;
  --accent: #265ec7;
  --accent-soft: #edf3ff;
  --focus: #0f766e;
  --error: #b54708;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.45;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 1rem;
}

.page-header { margin-bottom: 1rem; }
h1 { margin-bottom: 0.25rem; }
.subline, .disclaimer { margin: 0.25rem 0; color: var(--muted); }

.layout {
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem;
  overflow: visible;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

fieldset {
  border: none;
  margin: 0;
  padding: 0;
  overflow: visible;
}

fieldset + fieldset,
details,
details fieldset { margin-top: 1rem; }


.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.field-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 36px;
  align-items: center;
  column-gap: 8px;
  margin-bottom: 0.25rem;
  min-height: 40px;
  overflow: visible;
}

legend {
  font-weight: 650;
  margin-bottom: 0;
}

.legend-main {
  display: block;
  line-height: 1.25;
  min-width: 0;
}

.info-toggle {
  appearance: none;
  -webkit-appearance: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid #cfd6df;
  border-radius: 999px;
  background: #f5f7fa;
  color: #556170;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
  touch-action: manipulation;
  position: relative;
  z-index: 1;
}

.info-glyph {
  display: block;
  line-height: 1;
}

.info-toggle:hover {
  background: #edf1f6;
  color: #3f4a58;
}

.info-toggle[aria-expanded="true"] {
  border-color: #b8c2ce;
  background: #eceff4;
  color: #384454;
}

.field-info {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  margin: 0;
  color: #556170;
  font-size: 0.92rem;
  line-height: 1.35;
  white-space: normal;
  word-break: normal;
  padding: 0 0.6rem;
  border-radius: 10px;
  background: #f5f7fa;
  transition: max-height 150ms ease, opacity 150ms ease, margin-bottom 150ms ease, padding-top 150ms ease, padding-bottom 150ms ease;
}

.field-info.is-open {
  max-height: 520px;
  opacity: 1;
  margin-bottom: 0.55rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  overflow: visible;
}

.tile-options {
  display: grid;
  gap: 0.5rem;
}

.tile {
  border: 1px solid var(--border);
  border-radius: 12px;
  min-height: 44px;
  padding: 0.75rem 0.85rem;
  background: #fff;
  cursor: pointer;
  transition: background-color 0.15s linear, border-color 0.15s linear;
}

.tile:hover {
  border-color: #b9c4d5;
  background: #fbfdff;
}

.tile input[type="radio"] { margin-right: 0.55rem; }

.tile:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.field-error {
  margin: 0.35rem 0 0;
  min-height: 1.2rem;
  color: var(--error);
  font-size: 0.92rem;
}

.microcopy {
  margin: 0.2rem 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.secondary {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 0.58rem 0.8rem;
  cursor: pointer;
}

.secondary:hover { background: #f9fafb; }

summary {
  cursor: pointer;
  font-weight: 650;
}

.result {
  background: linear-gradient(180deg, #ffffff 0%, #f9fbff 100%);
}

.result-frame {
  min-height: 430px;
}

.result--neutral {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.result--neutral .result-frame {
  min-height: 0;
}

.result-placeholder {
  margin: 0.4rem 0 0;
  color: var(--muted);
}

.ampel-badge {
  display: inline-block;
  margin: 0;
  font-weight: 650;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  background: #fff;
}

.score {
  font-size: clamp(2.4rem, 9vw, 4rem);
  font-weight: 800;
  line-height: 1.05;
  margin: 0.35rem 0 0.15rem;
}

.interpretation {
  margin: 0.2rem 0 0.35rem;
  font-size: 1.05rem;
}

.confidence {
  margin: 0 0 0.8rem;
  color: var(--muted);
}

.result-section + .result-section { margin-top: 0.9rem; }

ul {
  margin: 0.45rem 0 0;
  padding-left: 1.25rem;
}

li { margin: 0.3rem 0; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

@media (min-width: 900px) {
  .field-head {
    grid-template-columns: minmax(0, 1fr) 32px;
  }

  .info-toggle {
    width: 32px;
    height: 32px;
  }

  .layout {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .result:not(.result--neutral) {
    position: sticky;
    top: 1rem;
  }
}

.page-footer {
  padding-top: 0;
  padding-bottom: 1.5rem;
}

.page-footer nav {
  display: flex;
  gap: 1rem;
}