/* Schriften liegen lokal (DSGVO: keine Verbindung zu Google). Lizenz: SIL Open Font License. */
@font-face { font-family: "Atkinson Hyperlegible"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/atkinson-hyperlegible-400.woff2") format("woff2"); }
@font-face { font-family: "Atkinson Hyperlegible"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/atkinson-hyperlegible-700.woff2") format("woff2"); }
@font-face { font-family: "Bricolage Grotesque"; font-style: normal; font-weight: 600 800; font-display: swap; src: url("fonts/bricolage-grotesque.woff2") format("woff2"); }

/* Layout: Schwimmhalle von oben. Bahnleinen als Trenner, Tiefenmarken als Abschnittslabels, Zeitstrahl als Bahn. */
:root {
  --tile: #eef4f5;
  --tile-2: #e2ecee;
  --ink: #0f2a37;
  --ink-soft: #46616d;
  --water: #17707f;
  --water-deep: #0d4f5c;
  --float: #e8b62c;
  --float-ink: #2b2102;
  --line: #c6d6da;
  --card: #ffffff;
  --ok: #1d7a4c;
  --bad: #b3261e;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --tile: #0c1c23; --tile-2: #11262f; --ink: #e4f0f2; --ink-soft: #9db6bf;
    --water: #4fb3c2; --water-deep: #2c8796; --float: #f0c443; --float-ink: #241b00;
    --line: #23404b; --card: #132b35; --ok: #5cc994; --bad: #ff8a80; color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--tile);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
}
img { max-width: 100%; }
[hidden] { display: none !important; }
.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
h1, h2, h3 { font-family: var(--display); line-height: 1.1; text-wrap: balance; margin: 0; }
p { margin: 0; }
a { color: var(--water); }
:focus-visible { outline: 3px solid var(--float); outline-offset: 2px; }

.lane {
  height: 10px;
  background:
    radial-gradient(circle at 5px 5px, var(--float) 4px, transparent 4.5px) 0 0 / 20px 10px,
    radial-gradient(circle at 15px 5px, var(--water) 4px, transparent 4.5px) 0 0 / 20px 10px;
  opacity: 0.9;
}

header .wrap { padding-block: 1.25rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.brand { font-family: var(--display); font-weight: 800; font-size: 1.15rem; letter-spacing: -0.01em; color: var(--ink); text-decoration: none; }
.brand small { display: block; font-family: var(--body); font-weight: 400; font-size: 0.8rem; color: var(--ink-soft); letter-spacing: 0.02em; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 700;
  background: var(--water-deep); color: #fff; border: 0; border-radius: 6px;
  padding: 0.75rem 1.2rem; font-family: var(--body); font-size: 1rem; cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--water); }
.btn[disabled] { opacity: 0.6; cursor: wait; }

.hero .wrap { padding-block: 3rem 3.5rem; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 2.5rem; align-items: end; }
.depth {
  font-family: var(--display); font-weight: 800; color: var(--water);
  font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.depth::before { content: ""; width: 1.6rem; height: 3px; background: currentColor; }
.hero h1 { font-size: clamp(2.3rem, 6vw, 4.2rem); font-weight: 800; letter-spacing: -0.02em; margin-top: 0.8rem; }
.hero h1 em { font-style: normal; color: var(--water); }
.hero .lead { margin-top: 1.2rem; font-size: 1.2rem; color: var(--ink-soft); max-width: 36rem; }
.hero .actions { margin-top: 1.8rem; display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.facts { display: grid; margin: 0; border-top: 2px solid var(--ink); }
.facts div { display: flex; justify-content: space-between; gap: 1rem; padding: 0.7rem 0; border-bottom: 1px solid var(--line); }
.facts dt { color: var(--ink-soft); }
.facts dd { margin: 0; font-weight: 700; text-align: right; }

section .wrap { padding-block: 3.5rem; }
.sec-head { display: grid; gap: 0.6rem; max-width: 44rem; margin-bottom: 2rem; }
.sec-head h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); font-weight: 800; letter-spacing: -0.01em; }
.sec-head p { color: var(--ink-soft); }

.band { background: var(--tile-2); }
.diff-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
.diff-grid article { display: grid; gap: 0.5rem; align-content: start; }
.diff-grid h3 { font-size: 1.2rem; }
.diff-grid p { color: var(--ink-soft); }

/* Zwei Varianten */
.packs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.pack { background: var(--card); border: 1.5px solid var(--line); border-radius: 8px; padding: 1.5rem; display: grid; gap: 0.9rem; align-content: start; min-width: 0; }
.pack.plus { border: 3px solid var(--water); }
.pack .kicker { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--water); }
.pack h3 { font-size: 1.45rem; }
.pack .price { font-family: var(--display); font-weight: 800; font-size: 1.6rem; }
.pack .price small { font-family: var(--body); font-weight: 400; font-size: 0.9rem; color: var(--ink-soft); }
.pack ul { margin: 0; padding-left: 1.2rem; display: grid; gap: 0.35rem; }
.pack .note { font-size: 0.9rem; color: var(--ink-soft); }
@media (max-width: 760px) { .packs { grid-template-columns: minmax(0, 1fr); } }
.step.day .marker { background: var(--water-deep); color: #fff; border-color: var(--water-deep); font-size: 0.72rem; letter-spacing: 0.04em; }
.step.day .step-body { background: var(--card); border-radius: 8px; padding: 0.9rem 1.1rem; border: 3px solid var(--water); }

/* Zeitstrahl: eine Bahn von oben nach unten */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; display: grid; gap: 0; }
.timeline::before {
  content: ""; position: absolute; left: 1.45rem; top: 0.6rem; bottom: 0.6rem; width: 4px;
  background: repeating-linear-gradient(to bottom, var(--water) 0 10px, var(--float) 10px 20px);
  border-radius: 2px;
}
.step { position: relative; display: grid; grid-template-columns: 3rem minmax(0, 1fr); gap: 1.25rem; padding-block: 0.9rem; }
.marker {
  position: relative; z-index: 1; width: 3rem; height: 3rem; border-radius: 50%;
  display: grid; place-items: center; font-family: var(--display); font-weight: 800; font-size: 1.15rem;
  background: var(--card); color: var(--water-deep); border: 3px solid var(--water);
  font-variant-numeric: tabular-nums;
}
.step-body { display: grid; gap: 0.25rem; padding-top: 0.35rem; min-width: 0; }
.step-body h3 { font-size: 1.15rem; }
.step-body p { color: var(--ink-soft); }
.step.zoom .marker { background: var(--float); color: var(--float-ink); border-color: var(--float); font-size: 0.72rem; letter-spacing: 0.04em; }
.step.zoom .step-body {
  background: var(--card); border-radius: 8px; padding: 0.9rem 1.1rem; border: 1px solid var(--line);
}
.when { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--water); }
.step.zoom .when { color: var(--ink); }
.tag { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; background: var(--float); color: var(--float-ink); border-radius: 3px; padding: 0.05rem 0.4rem; margin-left: 0.3rem; vertical-align: 0.15em; }

.about .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 2.5rem; }
.about ul { margin: 0; padding-left: 1.2rem; display: grid; gap: 0.4rem; }

.signup { background: var(--water-deep); color: #fff; }
.signup .sec-head p { color: #cfe6ea; }
.signup .depth { color: var(--float); }
form { background: var(--card); color: var(--ink); border-radius: 8px; padding: 1.5rem; display: grid; gap: 1.1rem; max-width: 40rem; }
.row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
label { display: grid; gap: 0.3rem; font-weight: 700; font-size: 0.95rem; }
input[type="text"], input[type="email"], select {
  font: inherit; font-weight: 400; padding: 0.65rem 0.75rem; border-radius: 6px;
  border: 1.5px solid var(--line); background: var(--tile); color: var(--ink); width: 100%;
}
fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 0.4rem; }
legend { font-weight: 700; font-size: 0.95rem; margin-bottom: 0.3rem; padding: 0; }
.checks { display: flex; flex-wrap: wrap; gap: 0.5rem 1.2rem; }
.check { display: flex; gap: 0.5rem; align-items: flex-start; font-weight: 400; }
.check input { margin-top: 0.3rem; accent-color: var(--water-deep); }
.consent { font-size: 0.9rem; color: var(--ink-soft); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.err { color: var(--bad); font-size: 0.9rem; font-weight: 700; }
.done { border-left: 4px solid var(--ok); padding: 0.75rem 1rem; background: var(--tile); border-radius: 4px; }
.done strong { color: var(--ok); }

/* Rechtstexte */
.legal .wrap { padding-block: 2.5rem 4rem; max-width: 46rem; }
.legal h1 { font-size: clamp(2rem, 5vw, 2.8rem); font-weight: 800; margin-bottom: 1.5rem; }
.legal h2 { font-size: 1.3rem; margin: 2rem 0 0.5rem; }
.legal p, .legal ul { margin: 0 0 0.8rem; }
.legal ul { padding-left: 1.2rem; }
.legal address { font-style: normal; margin-bottom: 0.8rem; }

footer .wrap { padding-block: 2rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; color: var(--ink-soft); font-size: 0.9rem; }
footer nav { display: flex; gap: 1.2rem; flex-wrap: wrap; }

@media (max-width: 760px) {
  .hero .wrap, .about .wrap { grid-template-columns: minmax(0, 1fr); }
  .diff-grid { grid-template-columns: minmax(0, 1fr); }
  .row { grid-template-columns: minmax(0, 1fr); }
}