/* BrauRechner — "Brauhaus": dunkles Braun + Kupfer/Amber, Fass- & Hopfenmotive, Serifen. */
:root {
  --braun-deep: #201104; --braun: #38220f; --braun-warm: #5a3a1c;
  --kupfer: #c47b2e; --kupfer-dark: #96590f; --amber: #f2ac33; --amber-pale: #fdeecd;
  --schaum: #fbf6ea; --bg: #f5eddc; --paper: #fffdf7;
  --ink: #2b1c0d; --mut: #77603f; --line: #e2d3b4; --radius: 10px;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Roboto Mono", Menlo, Consolas, monospace;
  --shadow: 0 4px 18px rgba(32,17,4,.10); --shadow-lift: 0 16px 38px rgba(32,17,4,.18);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); background: var(--bg); color: var(--ink); line-height: 1.7; -webkit-font-smoothing: antialiased; }
.container { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 700; line-height: 1.25; color: var(--braun-deep); }
/* Fassdauben-Trennlinie */
.fassdiv { height: 14px; background: repeating-linear-gradient(90deg, var(--braun-warm) 0 14px, var(--kupfer) 14px 18px, var(--braun) 18px 44px); opacity: .85; border-top: 2px solid var(--braun-deep); border-bottom: 2px solid var(--braun-deep); }
header.site { background: var(--braun-deep); position: sticky; top: 0; z-index: 50; border-bottom: 4px solid var(--kupfer); }
header.site .bar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding: 13px 0; }
.brand { font-family: var(--serif); font-size: 1.5rem; font-weight: 700; color: #fff; text-decoration: none; display: inline-flex; align-items: center; letter-spacing: .01em; }
.brand .hopfen { width: 40px; height: 40px; margin-right: 11px; display: inline-flex; align-items: center; justify-content: center; background: radial-gradient(circle at 35% 30%, var(--amber), var(--kupfer-dark)); border-radius: 50% 50% 50% 4px; border: 2px solid var(--amber); }
.brand .hopfen svg { width: 22px; height: 22px; fill: var(--braun-deep); }
.brand em { font-style: normal; color: var(--amber); }
nav.main a { color: #e6d3ae; text-decoration: none; margin-left: 22px; font-size: .88rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
nav.main a:hover { color: var(--amber); }
.hero { position: relative; padding: 100px 0 96px; background: url('../images/hero.webp') center/cover; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(32,17,4,.93), rgba(32,17,4,.55) 70%, rgba(32,17,4,.25)); }
.hero .container { position: relative; z-index: 1; }
.hero .brau { display: inline-block; background: rgba(242,172,51,.16); border: 1px solid rgba(242,172,51,.65); color: #f8cf7e; font-size: .78rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; padding: 8px 20px; margin-bottom: 20px; border-radius: 999px; }
.hero h1 { color: #fff; font-size: 3rem; max-width: 680px; margin-bottom: 16px; font-style: italic; }
.hero h1 .or { color: var(--amber); }
.hero p.lead { color: #e6d3ae; font-size: 1.12rem; max-width: 620px; margin-bottom: 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-kupfer { display: inline-block; background: linear-gradient(135deg, var(--amber), var(--kupfer-dark)); color: var(--braun-deep); text-decoration: none; padding: 15px 38px; font-weight: 800; font-family: var(--serif); font-size: 1.05rem; border-radius: 999px; box-shadow: 0 10px 26px rgba(242,172,51,.4); transition: transform .15s; }
.btn-kupfer:hover { transform: translateY(-3px); }
.btn-schaum { display: inline-block; border: 2px solid rgba(255,255,255,.55); color: #fff; text-decoration: none; padding: 13px 34px; font-weight: 700; border-radius: 999px; font-size: .95rem; }
.btn-schaum:hover { background: rgba(255,255,255,.12); }
section.block { padding: 68px 0; }
.sec-pre { color: var(--kupfer-dark); font-size: .8rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; font-family: var(--mono); }
.sec-title { font-size: 2.3rem; margin: 8px 0 12px; }
.sec-sub { color: var(--mut); max-width: 720px; margin-bottom: 36px; font-size: 1.02rem; }
.tgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 24px; }
.tcard { background: var(--paper); border-radius: var(--radius); text-decoration: none; color: var(--ink); box-shadow: var(--shadow); transition: transform .16s, box-shadow .16s; display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-top: 6px solid var(--braun-warm); }
.tcard:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); border-top-color: var(--kupfer); }
.tcard .ph { height: 134px; background-size: cover; background-position: center; border-bottom: 3px solid var(--amber); }
.tcard .tx { padding: 22px 24px 26px; flex: 1; }
.tcard .no { font-family: var(--mono); font-size: .72rem; color: var(--kupfer-dark); letter-spacing: .08em; font-weight: 700; }
.tcard .tx h3 { font-size: 1.3rem; margin: 6px 0 8px; }
.tcard .tx p { font-size: .93rem; color: var(--mut); margin-bottom: 14px; }
.tcard .go { font-weight: 800; color: var(--braun-deep); font-size: .92rem; font-family: var(--serif); }
.tcard .go span { color: var(--kupfer-dark); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin: 52px 0; }
.split.flip > div:first-child { order: 2; }
.split img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow-lift); display: block; border: 4px solid var(--paper); }
.split h3 { font-size: 1.7rem; margin-bottom: 12px; }
.split p { color: var(--mut); margin-bottom: 12px; }
.split .more { font-weight: 800; color: var(--kupfer-dark); text-decoration: none; border-bottom: 3px solid var(--amber); font-family: var(--serif); font-size: 1.02rem; }
table.ref { width: 100%; border-collapse: collapse; margin: 12px 0 24px; font-size: .93rem; background: var(--paper); border-radius: 8px; overflow: hidden; box-shadow: var(--shadow); }
table.ref th { background: var(--braun-deep); color: var(--amber); padding: 12px 14px; text-align: left; font-size: .84rem; text-transform: uppercase; letter-spacing: .05em; }
table.ref td { padding: 11px 14px; border-bottom: 1px solid var(--line); }
table.ref tr:last-child td { border-bottom: none; }
table.ref tr:nth-child(even) td { background: #f7efdb; }
.crumbs { font-size: .85rem; color: var(--mut); margin: 22px 0 8px; font-family: var(--mono); }
.crumbs a { color: var(--kupfer-dark); text-decoration: none; font-weight: 700; }
.pagehead { max-width: 780px; }
.pagehead h1 { font-size: 2.5rem; margin-bottom: 10px; font-style: italic; }
.pagehead h1 .or { color: var(--kupfer-dark); }
.pagehead p { color: var(--mut); }
.pagehead .pimg { margin: 26px 0 0; max-width: 640px; }
.pagehead .pimg img { width: 100%; max-height: 300px; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow-lift); border: 4px solid var(--paper); }
.calc { background: var(--paper); border-radius: var(--radius); padding: 36px; margin: 30px 0; box-shadow: var(--shadow); border: 1px solid var(--line); max-width: 740px; border-left: 8px solid var(--kupfer); }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 700; margin-bottom: 7px; font-size: .85rem; text-transform: uppercase; letter-spacing: .05em; color: var(--braun); }
.field input, .field select { width: 100%; padding: 13px 16px; border: 2px solid var(--line); border-radius: 8px; font-size: 1rem; font-family: var(--mono); background: #fdf9ef; }
.field input:focus, .field select:focus { outline: none; border-color: var(--kupfer); background: #fff; }
.field input.invalid { border-color: #b23a2e; background: #fdf2ef; }
.field .hint { font-size: .83rem; color: var(--mut); margin-top: 5px; }
.field .error { font-size: .83rem; color: #b23a2e; margin-top: 5px; display: none; font-weight: 600; }
.btn-row { display: flex; gap: 12px; margin-top: 8px; flex-wrap: wrap; }
button.calc-btn { background: linear-gradient(135deg, var(--amber), var(--kupfer-dark)); color: var(--braun-deep); border: none; padding: 15px 32px; font-size: 1rem; font-weight: 800; cursor: pointer; flex: 1; min-width: 200px; font-family: var(--serif); border-radius: 999px; box-shadow: 0 8px 22px rgba(196,123,46,.35); transition: transform .15s; }
button.calc-btn:hover { transform: translateY(-2px); }
button.reset-btn { background: transparent; color: var(--mut); border: 2px solid var(--line); padding: 13px 26px; cursor: pointer; font-weight: 700; font-size: .85rem; border-radius: 999px; letter-spacing: .04em; text-transform: uppercase; }
button.reset-btn:hover { border-color: var(--mut); }
.zrow { display: grid; grid-template-columns: 2fr 1fr 1fr auto; gap: 10px; margin-bottom: 10px; align-items: end; }
.zrow input { width: 100%; padding: 11px 12px; border: 2px solid var(--line); border-radius: 8px; font-family: var(--mono); background: #fdf9ef; }
.zrow button.rm { background: #f3e2c8; border: none; border-radius: 8px; padding: 11px 14px; cursor: pointer; font-weight: 800; color: var(--braun); }
.zrow button.rm:hover { background: #e9d0a5; }
.add-row { background: transparent; border: 2px dashed var(--kupfer); color: var(--kupfer-dark); padding: 10px 20px; border-radius: 999px; cursor: pointer; font-weight: 700; margin: 6px 0 16px; }
.result { display: none; margin-top: 26px; background: linear-gradient(135deg, var(--braun-deep), var(--braun)); border-radius: var(--radius); padding: 28px; color: #f5e9d0; border-left: 8px solid var(--amber); }
.result.show { display: block; animation: brauIn .35s ease; }
@keyframes brauIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.result .big { font-family: var(--serif); font-size: 2.1rem; font-weight: 700; color: var(--amber); font-style: italic; }
.result .rrow { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,.16); font-size: .95rem; font-family: var(--mono); flex-wrap: wrap; }
.result .rrow:last-child { border-bottom: none; }
.result .rrow span:first-child { color: #d9c49a; }
.result .note { font-size: .85rem; color: #d9c49a; margin-top: 10px; }
article.prose { margin: 38px 0; max-width: 800px; }
article.prose h2 { font-size: 1.7rem; margin: 36px 0 12px; font-style: italic; }
article.prose h3 { font-size: 1.2rem; margin: 26px 0 8px; }
article.prose p, article.prose li { margin-bottom: 10px; color: #453418; }
article.prose ul, article.prose ol { padding-left: 22px; }
.formel { background: var(--paper); border: 2px solid var(--line); border-radius: var(--radius); padding: 20px 24px; margin: 20px 0; font-family: var(--mono); font-size: .95rem; border-left: 8px solid var(--amber); }
.warnbox { background: var(--amber-pale); border: 2px solid var(--kupfer); border-radius: var(--radius); padding: 18px 22px; margin: 24px 0; font-size: .92rem; color: #6e4410; }
.warnbox strong { text-transform: uppercase; letter-spacing: .04em; }
.tipbox { background: #f0e6cf; border: 2px solid var(--braun-warm); border-radius: var(--radius); padding: 18px 22px; margin: 24px 0; font-size: .92rem; color: var(--braun); }
.example { background: var(--paper); border-radius: var(--radius); padding: 20px 24px; margin: 22px 0; box-shadow: var(--shadow); border-left: 8px solid var(--braun-warm); font-size: .93rem; }
.example h4 { font-family: var(--serif); font-style: italic; margin-bottom: 8px; }
.faq details { background: var(--paper); border-radius: var(--radius); margin-bottom: 10px; padding: 16px 22px; box-shadow: var(--shadow); border: 1px solid var(--line); }
.faq summary { font-weight: 700; cursor: pointer; font-family: var(--serif); font-size: 1.05rem; }
.faq p { margin-top: 8px; color: var(--mut); font-size: .94rem; }
.cta-band { background: linear-gradient(120deg, var(--braun-deep), var(--braun)); border-radius: var(--radius); padding: 56px 36px; text-align: center; color: #e6d3ae; margin: 62px 0; border-top: 6px solid var(--kupfer); }
.cta-band h2 { color: #fff; font-size: 2.1rem; margin-bottom: 10px; font-style: italic; }
.cta-band h2 .or { color: var(--amber); }
.cta-band p { margin-bottom: 26px; }
footer.site { background: var(--braun-deep); color: #a98f63; padding: 56px 0 28px; margin-top: 64px; font-size: .9rem; border-top: 4px solid var(--kupfer); }
footer.site .fgrid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 28px; margin-bottom: 28px; }
footer.site h4 { color: var(--amber); font-size: .82rem; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 12px; font-family: var(--sans); }
footer.site a { color: #e6d3ae; text-decoration: none; display: block; margin-bottom: 8px; }
footer.site a:hover { color: var(--amber); }
footer.site .brand { color: #fff; }
footer.site .bottom { border-top: 1px solid rgba(255,255,255,.14); padding-top: 20px; color: #7d6845; font-size: .82rem; font-family: var(--mono); }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } footer.site .fgrid { grid-template-columns: 1fr 1fr; } .hero h1 { font-size: 2.1rem; } .zrow { grid-template-columns: 1fr 1fr; } nav.main a { margin-left: 12px; } .calc { padding: 24px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .result.show { animation: none; } }