/* Kauf-Strecke Campus (kaufen.html, danke.html, agb.html) – CI V4 · 28.10.2026 */
@font-face { font-family: 'Syne'; src: url('fonts/syne.woff2') format('woff2'); font-weight: 400 800; font-display: swap; }
@font-face { font-family: 'Instrument Sans'; src: url('fonts/instrument-sans.woff2') format('woff2'); font-weight: 400 700; font-display: swap; }
:root {
  --paper: #f6f4ef; --paper2: #ece8df; --white: #fff; --ink: #0b1530; --ink2: #3d4762; --ink3: #737b93;
  --rule: #d8d3c8; --blue: #1d4ed8; --yellow: #ffd83a; --ok: #15803d; --err: #b91c1c;
  --display: 'Syne', 'Arial Black', sans-serif; --sans: 'Instrument Sans', system-ui, sans-serif;
  --mono: ui-monospace, 'SFMono-Regular', Consolas, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 var(--sans); }
a { color: var(--blue); }
.wrap { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(760px, calc(100% - 32px)); }

.top { background: var(--paper); border-bottom: 1px solid var(--rule); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 800 1.3rem/1 var(--display); letter-spacing: -.03em; }
.logo img { width: 44px; height: 44px; border-radius: 50%; box-shadow: 0 0 0 1px var(--rule); flex: none; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 22px; border-radius: 4px;
  font: 600 1rem/1.2 var(--sans); text-decoration: none; cursor: pointer; border: 1px solid var(--ink); background: transparent; color: var(--ink); }
.btn-blue { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn-blue:hover { background: #1a43bd; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.btn-sm { min-height: 40px; padding: 0 14px; font-size: .92rem; }

.label { font: 600 .74rem/1.2 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink3); }
h1 { font: 800 clamp(2rem, 6vw, 3.4rem)/1.04 var(--display); letter-spacing: -.035em; margin: 12px 0 18px; hyphens: manual; overflow-wrap: break-word; }
h2 { font: 800 1.5rem/1.15 var(--display); letter-spacing: -.02em; margin: 0 0 10px; }
.lead { font-size: 1.12rem; color: var(--ink2); max-width: 60ch; }
.page { padding: 44px 0 72px; }

.kauf { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; margin-top: 26px; align-items: start; }
.box { background: var(--white); border: 1px solid var(--rule); padding: 26px; }
.box-ink { background: var(--ink); color: #fff; border-color: var(--ink); border-top: 4px solid var(--yellow); }
.ticks { list-style: none; padding: 0; margin: 14px 0 0; }
.ticks li { position: relative; padding: 9px 0 9px 30px; border-top: 1px solid var(--rule); }
.ticks li:first-child { border-top: 0; }
.ticks li::before { content: ''; position: absolute; left: 2px; top: 15px; width: 14px; height: 8px; border-left: 3px solid var(--blue); border-bottom: 3px solid var(--blue); transform: rotate(-45deg); }
.price { font: 800 3.6rem/1 var(--display); letter-spacing: -.04em; margin: 8px 0 4px; }
.box-ink .label { color: #b9c0d6; }
.box-ink p { color: #d7dbe8; margin: 6px 0; }
.small { font-size: .84rem; }
.muted { color: var(--ink3); }

.consent { display: flex; gap: 12px; align-items: flex-start; margin: 22px 0 16px; padding: 14px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.25); cursor: pointer; }
.consent input { width: 22px; height: 22px; margin: 2px 0 0; flex: none; accent-color: var(--yellow); cursor: pointer; }
.consent span { font-size: .86rem; line-height: 1.55; color: #e4e7f0; }
.consent a { color: var(--yellow); }
.box-ink .btn-pay { width: 100%; background: var(--yellow); border-color: var(--yellow); color: var(--ink); font-weight: 600; }
.pay-hint { font-size: .8rem; color: #b9c0d6; text-align: center; margin: 10px 0 0; }
.pay-err { display: none; margin-top: 12px; padding: 12px; background: #fff1f1; color: var(--err); font-size: .9rem; }

.code-big { font: 800 clamp(1.6rem, 7vw, 2.6rem)/1.1 var(--mono); letter-spacing: .06em; background: var(--white); border: 2px dashed var(--blue); color: var(--blue);
  padding: 18px; text-align: center; margin: 14px 0; user-select: all; overflow-wrap: anywhere; }
.row { display: flex; flex-wrap: wrap; gap: 10px; }
.wait { display: flex; align-items: center; gap: 12px; color: var(--ink2); }
.spin { width: 22px; height: 22px; border: 3px solid var(--rule); border-top-color: var(--blue); border-radius: 50%; animation: sp 1s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spin { animation: none; } }

.doc h2 { font-size: 1.2rem; margin: 30px 0 8px; }
.doc h3 { font-size: 1rem; margin: 18px 0 6px; }
.doc p, .doc li { color: var(--ink2); }
.doc .form { background: var(--white); border: 1px solid var(--rule); padding: 16px 18px; }

.foot { border-top: 1px solid var(--rule); padding: 26px 0 34px; font-size: .88rem; color: var(--ink3); }
.foot-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.foot a { color: var(--ink2); margin-left: 14px; }
.foot a:first-child { margin-left: 0; }

@media (max-width: 820px) { .kauf { grid-template-columns: 1fr; } }
@media (max-width: 520px) {
  .logo { font-size: 1.05rem; gap: 8px; } .logo img { width: 36px; height: 36px; }
  .box { padding: 20px; } .price { font-size: 3rem; } .page { padding-top: 30px; }
}
.top .btn-sm { white-space: nowrap; }
@media (max-width: 400px) { .top .btn-sm { font-size: .8rem; padding: 0 10px; min-height: 36px; } }