/* Schnaps-Rechner — look of the design (requirements/2026-10-21-schnaps-rechner/design/),
   "Industry" tokens with the blueprint frame. Every style lives here: the server's CSP
   forbids inline style attributes, so the markup only carries classes. */

:root {
  --color-bg: #f2f2f3;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-accent-900: #1d2d3d;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);
  --muted-80: color-mix(in srgb, var(--color-text) 80%, transparent);
  --muted-75: color-mix(in srgb, var(--color-text) 75%, transparent);
  --muted-70: color-mix(in srgb, var(--color-text) 70%, transparent);
  --muted-55: color-mix(in srgb, var(--color-text) 55%, transparent);
  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-body: "Barlow", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-body); font-size: 15px; line-height: 1.55; font-weight: 400;
}
h1, h2 { font-family: var(--font-heading); font-weight: 600; letter-spacing: -0.015em; margin: 0; }
h1 { font-size: 40px; line-height: 1.02; text-wrap: balance; }
h2 { font-size: 28px; line-height: 1.1; }
p { margin: 0; text-wrap: pretty; }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

/* — page frame: one column, phone first — */
.page { min-height: 100vh; display: flex; flex-direction: column; align-items: center; padding: 0 16px 64px; }
.column { width: 100%; max-width: 560px; display: flex; flex-direction: column; gap: 28px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--color-divider);
}
.brand { font-family: var(--font-heading); font-size: 20px; letter-spacing: 0.04em; text-transform: uppercase; }
.lang { display: flex; }
.lang button {
  min-width: 44px; min-height: 40px; padding: 4px 8px; cursor: pointer;
  font: 600 14px var(--font-heading); letter-spacing: 0.06em; color: var(--color-text);
  background: transparent; border: 1px solid var(--color-divider);
}
.lang button + button { border-left: 0; }
.lang button[aria-pressed="true"] { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg); }

.intro { display: flex; flex-direction: column; gap: 6px; }
.intro .tag { align-self: flex-start; margin-bottom: 4px; }
.lead { font-size: 15px; line-height: 1.5; color: var(--muted-75); }

.tag {
  display: inline-flex; align-items: center; font-size: 11px; letter-spacing: 0.02em;
  padding: 3px 10px; border: 1px solid var(--color-accent); color: var(--color-accent);
}
a.tag { text-decoration: none; }
.faq-body a { color: var(--color-accent); }

/* — blueprint frame with registration marks — */
.blueprint {
  position: relative; border: 1px solid var(--color-divider);
  padding: 20px 16px; display: flex; flex-direction: column; gap: 18px;
}
.blueprint > .corner { position: absolute; width: 11px; height: 11px; color: var(--muted-55); }
.blueprint > .corner::before, .blueprint > .corner::after { content: ""; position: absolute; background: currentColor; }
.blueprint > .corner::before { left: 5px; top: 0; width: 1px; height: 100%; }
.blueprint > .corner::after { top: 5px; left: 0; width: 100%; height: 1px; }
.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }

.kicker { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-accent-700); }

/* — form — */
.field > label { display: block; font-size: 12px; margin-bottom: 5px; color: var(--muted-70); }
.input {
  width: 100%; min-height: 48px; padding: 6px 10px; font: inherit; font-size: 17px;
  color: var(--color-text); caret-color: var(--color-accent);
  background: transparent; border: 1px solid var(--color-divider); border-radius: 0;
}
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }
.input[aria-invalid="true"] { border-color: var(--color-accent-700); }
.amount-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }

.seg { display: flex; border: 1px solid var(--color-divider); }
.seg-opt {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  min-width: 52px; padding: 7px 12px; font-size: 15px; cursor: pointer;
}
.seg-opt + .seg-opt { border-left: 1px solid var(--color-divider); }
.seg-opt input { position: absolute; opacity: 0; width: 0; height: 0; pointer-events: none; }
.seg-opt:has(input:checked) { background: var(--color-accent); color: var(--color-bg); }
.seg-opt:has(input:focus-visible) { outline: 2px solid var(--color-accent); outline-offset: -2px; }

.quick { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: -8px; }
.quick-label { font-size: 12px; color: var(--muted-70); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 36px; padding: 4px 12px;
  cursor: pointer; font: 600 14px/1.2 var(--font-heading); color: var(--color-text);
  background: transparent; border: 1px solid var(--color-divider); border-radius: 0;
}
.btn:hover { background: color-mix(in srgb, var(--color-text) 7%, transparent); }
.btn:active { background: color-mix(in srgb, var(--color-text) 14%, transparent); }

/* — result — */
.errors { display: flex; flex-direction: column; gap: 4px; font-size: 15px; line-height: 1.45; }
.result { display: flex; flex-direction: column; gap: 18px; }
.water { display: flex; flex-direction: column; gap: 4px; }
.water-label { font-size: 14px; color: var(--muted-75); }
.water-values { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 18px; }
.water-primary { font-family: var(--font-heading); font-size: 56px; line-height: 1; color: var(--color-accent-700); }
.water-secondary { font-family: var(--font-heading); font-size: 26px; line-height: 1; color: var(--muted-70); }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--color-divider); border-left: 1px solid var(--color-divider); }
.cell {
  padding: 12px; display: flex; flex-direction: column; gap: 2px;
  border-right: 1px solid var(--color-divider); border-bottom: 1px solid var(--color-divider);
}
.cell-label, .cell-sub { font-size: 12px; color: var(--muted-70); }
.cell-sub { font-size: 13px; }
.cell-value { font-family: var(--font-heading); font-size: 24px; }

.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: right; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  padding: 7px; border-bottom: 1px solid var(--color-divider);
}
.table td {
  text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; padding: 7px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-text) 8%, transparent);
}
.table th:first-child, .table td:first-child { text-align: left; white-space: normal; min-width: 7.5em; }
.note { font-size: 14px; line-height: 1.5; color: var(--muted-80); }

/* — background section — */
.explain { display: flex; flex-direction: column; gap: 12px; }
.faq { display: flex; flex-direction: column; border-top: 1px solid var(--color-divider); }
.faq details { border-bottom: 1px solid var(--color-divider); }
.faq summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  gap: 12px; padding: 16px 0; font-family: var(--font-heading); font-size: 20px;
}
.faq summary::-webkit-details-marker { display: none; }
.chev { font-family: var(--font-body); font-size: 22px; color: var(--color-accent-700); transition: transform 150ms; }
.faq details[open] > summary .chev { transform: rotate(45deg); }
.faq-body { padding: 0 0 18px; display: flex; flex-direction: column; gap: 10px; font-size: 15px; line-height: 1.55; }

.offline { font-size: 12px; color: var(--muted-55); text-align: center; }

[hidden] { display: none !important; }

@media (max-width: 360px) {
  h1 { font-size: 34px; }
  .water-primary { font-size: 46px; }
  .two { grid-template-columns: 1fr; }
}