:root {
  --bg: #f3f5f4;
  --card: #ffffff;
  --text: #17201b;
  --muted: #5d6a63;
  --line: #d9e0dc;
  --accent: #006f3c;      /* S-Bahn green */
  --accent-soft: #e0f1e8;
  --pick: #e8710a;
  --warn-bg: #fff4e0;
  --warn: #8a5300;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111513;
    --card: #1b211e;
    --text: #e8eeea;
    --muted: #9aa8a0;
    --line: #2d3631;
    --accent: #3fbf7f;
    --accent-soft: #1f3a2c;
    --pick: #ff9a3d;
    --warn-bg: #3a2c12;
    --warn: #ffc76b;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

header { padding: 18px 16px 6px; }
h1 { margin: 0; font-size: 26px; letter-spacing: -0.02em; }
.station-btn { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 10px; margin: 2px 0 0; padding: 0;
  font: inherit; color: var(--muted); background: none; border: 0; text-align: left; cursor: pointer; }
.station-btn .change { color: var(--accent); font-size: 14px; text-decoration: underline; }

.search input { width: 100%; font: inherit; font-size: 16px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg); color: var(--text); }
.link-btn { font: inherit; font-size: 14px; color: var(--accent); background: none; border: 0; padding: 10px 0 0; cursor: pointer; }
.search .hint { padding: 8px 0 0; }
.results { list-style: none; margin: 8px 0 0; padding: 0; }
.results li a { display: block; padding: 10px 2px; border-top: 1px solid var(--line); color: var(--text); text-decoration: none; }
.results li:first-child a { border-top: 0; }
.results small { display: block; color: var(--muted); font-size: 13px; }
.results .res-title { font-size: 13px; font-weight: 600; color: var(--muted); padding: 6px 2px 2px; }

main { padding: 8px 16px 16px; max-width: 640px; margin: 0 auto; }
header, footer { max-width: 640px; margin: 0 auto; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 14px;
}

.form label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin: 10px 0 6px; }
.form label:first-child { margin-top: 0; }
select {
  width: 100%;
  font: inherit;
  font-size: 17px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  -webkit-appearance: none;
  appearance: none;
}
.form .check { display: flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 500; color: var(--text); margin-top: 14px; }
.check input { width: 20px; height: 20px; accent-color: var(--accent); }

.result .verdict { font-size: 32px; font-weight: 750; letter-spacing: -0.02em; margin: 0; color: var(--accent); }
.result .detail { margin: 4px 0 14px; color: var(--muted); }
.result .warn { background: var(--warn-bg); color: var(--warn); border-radius: 10px; padding: 10px 12px; font-size: 14px; margin-top: 12px; }

.train { position: relative; margin: 8px 0 4px; }
.train-body { display: flex; height: 40px; border-radius: 10px 22px 22px 10px; overflow: hidden; border: 2px solid var(--line); }
.seg { flex: 1; display: flex; align-items: center; justify-content: center; font-size: 13px; color: var(--muted); border-right: 1px solid var(--line); }
.seg:last-child { border-right: 0; }
.seg.on { background: var(--accent); color: #fff; font-weight: 700; }
.marker { position: absolute; top: -7px; width: 4px; height: 54px; border-radius: 2px; background: var(--pick); transform: translateX(-2px); }
.dir { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }

.status { color: var(--muted); font-size: 14px; margin: 0 4px 14px; }
.status.error { color: #c0392b; }

.map-card { padding: 0; overflow: hidden; }
#map { height: 340px; background: var(--line); }
.hint { font-size: 13px; color: var(--muted); margin: 0; padding: 10px 14px; }

#alts h2 { font-size: 15px; margin: 0 0 8px; }
.alt { display: flex; justify-content: space-between; align-items: center; gap: 10px; width: 100%; text-align: left;
  font: inherit; color: var(--text); background: none; border: 0; border-top: 1px solid var(--line); padding: 11px 2px; cursor: pointer; }
.alt:first-of-type { border-top: 0; }
.alt small { color: var(--muted); display: block; }
.alt .z { font-weight: 700; white-space: nowrap; }
.alt.sel .z { color: var(--pick); }

.actions { text-align: center; }
button#reload { font: inherit; padding: 10px 18px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--text); }

footer { font-size: 12px; color: var(--muted); padding: 4px 16px 24px; text-align: center; }
footer a { color: inherit; }

.lbl { background: var(--card); color: var(--text); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: 12px; font-weight: 700; white-space: nowrap; }
.lbl.front { background: var(--accent); color: #fff; border-color: var(--accent); }

.result .section { display: flex; align-items: center; gap: 8px; font-weight: 650; margin: 6px 0 2px; }
.result .section b { display: inline-grid; place-items: center; min-width: 28px; height: 28px; padding: 0 6px; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 16px; }
.result .walk { background: var(--warn-bg); color: var(--warn); border-radius: 10px; padding: 8px 12px; font-size: 14px; margin: 8px 0 0; }
.lbl.sec { background: var(--accent); color: #fff; border-color: var(--accent); }

.live-info { font-size: 14px; color: var(--muted); margin: 6px 0 0; }
.live-info.error { color: var(--warn); }
#live-row { padding-bottom: 6px; border-bottom: 1px solid var(--line); margin-bottom: 4px; }
#live-time { font: inherit; font-size: 16px; padding: 8px 10px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); }

.form .group-label { font-size: 13px; font-weight: 600; color: var(--muted); margin: 10px 0 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: inherit; font-size: 15px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); cursor: pointer; }
.chip small { color: var(--muted); margin-left: 4px; font-variant-numeric: tabular-nums; }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip[aria-pressed="true"] small { color: inherit; opacity: .85; }
.chip:disabled { opacity: .45; cursor: default; }
.chip:focus-visible { outline: 3px solid var(--pick); outline-offset: 2px; }