/* Letzte Bahn – one stylesheet for all pages.
   Palette: timetable paper, night-blue ink and the yellow/green of the German
   bus-stop sign (Haltestellenschild). The night-blue ramp in common.js carries the data. */

:root {
  --paper: #f3f5f4;
  --surface: #fcfcfb;
  --ink: #15233f;
  --ink-2: #4b566b;
  --muted: #5e6879;
  --rule: #d9dee4;
  --rule-strong: #b3bbc6;
  --sign-yellow: #f2c200;
  --sign-green: #0b7a48;
  --focus: #2a78d6;
  --series-1: #2a78d6;
  --neutral-bar: #b9c0cb;
  --hatch: rgba(158, 197, 244, 0.55);
  --font-text: "Barlow", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-sign: "Barlow Semi Condensed", "Barlow", system-ui, sans-serif;
  --header-height: 60px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 1rem;
  line-height: 1.5;
}

a { color: var(--ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--sign-green); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--ink);
  color: #fff;
}
.skip-link:focus { top: 0.75rem; }

/* ------------------------------------------------------------ header */

.site-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-height: var(--header-height);
  padding: 0.5rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--rule);
}
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; }
.brand-mark { width: 34px; height: 34px; flex: none; }
.brand-name {
  font-family: var(--font-sign);
  font-weight: 700;
  font-size: 1.55rem;
  line-height: 1;
  color: var(--ink);
}
.brand-claim { margin: 0; color: var(--ink-2); }
.site-nav { margin-left: auto; display: flex; gap: 0.2rem; }
.site-nav a {
  font-family: var(--font-sign);
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border-radius: 3px;
}
.site-nav a:hover { background: var(--paper); color: var(--ink); }
.site-nav a[aria-current="page"] { background: var(--ink); color: #fff; }

@media (max-width: 1100px) {
  .brand-claim { display: none; }
}

/* ------------------------------------------------------------ map page */

.map-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 440px;
  height: calc(100dvh - var(--header-height));
  min-height: 600px;
}
.map-wrap { position: relative; min-width: 0; }
#map { position: absolute; inset: 0; }

.panel {
  overflow-y: auto;
  background: var(--surface);
  border-left: 1px solid var(--rule);
  padding: 1.1rem 1.25rem 2.5rem;
}

.control-label {
  display: block;
  margin: 0 0 0.35rem;
  padding: 0;
  font-family: var(--font-sign);
  font-weight: 600;
  font-size: 1rem;
}
input, select, button { font: inherit; color: inherit; }
.search-row { display: flex; gap: 0.4rem; }
.search-row input,
select {
  width: 100%;
  min-width: 0;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  background: #fff;
}
.search-row button {
  flex: none;
  padding: 0.45rem 0.9rem;
  border: 0;
  border-radius: 3px;
  background: var(--ink);
  color: #fff;
  font-family: var(--font-sign);
  font-weight: 600;
  cursor: pointer;
}
.search-status { min-height: 1.2em; margin: 0.25rem 0 0; font-size: 0.88rem; color: var(--ink-2); }

.controls { margin-top: 0.6rem; padding-bottom: 1.1rem; border-bottom: 1px solid var(--rule); }
fieldset { margin: 1rem 0 0; padding: 0; border: 0; min-width: 0; }
.segments { display: flex; flex-wrap: wrap; gap: 4px; }
.segment { position: relative; }
.segment input { position: absolute; inset: 0; margin: 0; opacity: 0; cursor: pointer; }
.segment span {
  display: block;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  background: #fff;
  font-family: var(--font-sign);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}
.segment input:checked + span { background: var(--ink); border-color: var(--ink); color: #fff; }
.segment input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }

.place { padding-top: 1.1rem; outline: none; }
.place h2 {
  margin: 0;
  font-family: var(--font-sign);
  font-weight: 700;
  font-size: 1.65rem;
  line-height: 1.1;
}
.place-sub { margin: 0.2rem 0 0.25rem; color: var(--ink-2); }
.hint { color: var(--ink-2); }
.summary { font-size: 1.05rem; }
.car-note, .change-note { font-size: 0.95rem; }
.change-note { padding-left: 0.6rem; border-left: 3px solid var(--sign-yellow); }

.text-button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  text-align: left;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

/* The personal timetable: destinations by time window, tinted with the map scale. */
.timetable-wrap { margin: 1rem 0; }
.timetable-wrap figcaption { margin-bottom: 0.4rem; font-size: 0.85rem; color: var(--ink-2); }
.timetable {
  width: 100%;
  border-collapse: separate;
  border-spacing: 2px;
  font-family: var(--font-sign);
  font-size: 0.93rem;
}
.timetable thead th {
  padding: 0 2px 4px;
  font-weight: 600;
  font-size: 0.78rem;
  line-height: 1.15;
  color: var(--ink-2);
  text-align: center;
  vertical-align: bottom;
}
.timetable thead th:first-child { text-align: left; }
.timetable tbody th {
  padding-right: 0.4rem;
  font-weight: 600;
  line-height: 1.15;
  text-align: left;
}
.timetable td.value {
  padding: 0.32rem 0.15rem;
  border-radius: 2px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-align: center;
  white-space: nowrap;
}
.timetable td.value.dark { color: #fff; }
.timetable td.unreachable {
  background-image: repeating-linear-gradient(135deg, var(--hatch) 0 2px, transparent 2px 7px);
}
.timetable td.car { background: var(--paper); color: var(--ink-2); font-weight: 500; }
.timetable tr.reach th, .timetable tr.reach td { font-size: 0.82rem; }
.timetable tr.reach th { padding-top: 0.5rem; }

.compare { margin-top: 1.4rem; }
.compare h3 { margin: 0; font-family: var(--font-sign); font-size: 1.2rem; }
.compare-sub { margin: 0.15rem 0 0.6rem; font-size: 0.85rem; color: var(--ink-2); }
.compare-list { display: grid; gap: 5px; margin: 0; padding: 0; list-style: none; }
.compare-row {
  display: grid;
  grid-template-columns: 9.5rem minmax(0, 1fr) 5.6rem;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}
.compare-name { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.compare-row.is-selected .compare-name { font-weight: 600; }
.compare-bar {
  display: block;
  height: 10px;
  border-radius: 0 4px 4px 0;
  background: var(--neutral-bar);
}
.compare-bar.is-selected { background: var(--series-1); }
.compare-bar.is-reference { height: 3px; background: var(--ink-2); }
.compare-bar.is-missing {
  background: repeating-linear-gradient(135deg, var(--neutral-bar) 0 3px, transparent 3px 7px);
}
.compare-value {
  font-family: var(--font-sign);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

.legend {
  position: absolute;
  left: 12px;
  bottom: 30px;
  z-index: 2;
  max-width: 280px;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: rgba(252, 252, 251, 0.95);
  font-size: 0.82rem;
}
.legend:empty { display: none; }
.legend-title { margin: 0; font-family: var(--font-sign); font-weight: 600; font-size: 0.98rem; line-height: 1.2; }
.legend-sub { margin: 0.1rem 0 0.45rem; color: var(--ink-2); }
.legend-items { display: grid; gap: 3px; margin: 0; padding: 0; list-style: none; }
.legend-items li { display: flex; align-items: center; gap: 0.45rem; }
.swatch { flex: none; width: 22px; height: 12px; border-radius: 2px; }
.swatch-hatched {
  background-image: repeating-linear-gradient(135deg, var(--hatch) 0 2px, transparent 2px 6px);
}
.legend-note { margin: 0.45rem 0 0; color: var(--ink-2); }

.map-tooltip {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 3;
  display: grid;
  max-width: 250px;
  padding: 0.4rem 0.6rem;
  border-radius: 3px;
  background: var(--ink);
  color: #fff;
  font-size: 0.82rem;
  pointer-events: none;
}
.map-tooltip[hidden] { display: none; }
.tooltip-value { font-family: var(--font-sign); font-size: 1.1rem; }
.tooltip-place { color: #cdd6e4; }

.map-note {
  position: absolute;
  top: 12px;
  left: 50%;
  z-index: 2;
  margin: 0;
  padding: 0.35rem 0.7rem;
  border-radius: 3px;
  background: var(--ink);
  color: #fff;
  font-size: 0.88rem;
  transform: translateX(-50%);
}

.table-section { max-width: 72rem; margin: 1.5rem auto 0; padding: 0 1.25rem; }
.table-section summary {
  font-family: var(--font-sign);
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
}
.table-caption { color: var(--ink-2); font-size: 0.9rem; }

.table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.data-table th, .data-table td {
  padding: 0.3rem 0.55rem;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.data-table thead th { border-bottom-color: var(--rule-strong); }
.data-table td.num { font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.sort-button {
  padding: 0;
  border: 0;
  background: none;
  font-family: var(--font-sign);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

@media (max-width: 900px) {
  .map-layout { grid-template-columns: 1fr; height: auto; min-height: 0; }
  .map-wrap { height: 62vh; min-height: 380px; }
  .panel { border-left: 0; border-top: 1px solid var(--rule); overflow: visible; }
  .legend { max-width: 220px; font-size: 0.76rem; bottom: 34px; }
  .legend-sub, .legend-note { display: none; }
  .site-header { flex-wrap: wrap; gap: 0.5rem 1rem; }
  .site-nav { margin-left: 0; }
}

/* ------------------------------------------------------------ article pages */

.article { max-width: 47rem; margin: 0 auto; padding: 2.5rem 1.25rem 4rem; }
.article-head h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-sign);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.3rem);
  line-height: 1.05;
}
.lead { max-width: 40rem; font-size: 1.18rem; color: var(--ink-2); }
.stand { font-size: 0.9rem; color: var(--muted); }
.finding { margin-top: 3rem; }
.finding h2 {
  max-width: 40rem;
  margin: 0 0 0.75rem;
  font-family: var(--font-sign);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.2vw, 1.95rem);
  line-height: 1.12;
}
.finding p, .finding ul { max-width: 40rem; }
.finding li + li { margin-top: 0.3rem; }
.method-note { padding-top: 2rem; border-top: 1px solid var(--rule); }

.figure {
  margin: 1.25rem 0 0;
  padding: 1rem 1rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--surface);
  overflow-x: auto;
}
.figure figcaption { margin-top: 0.5rem; font-size: 0.85rem; color: var(--ink-2); }
.keys { display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 0.5rem; font-size: 0.9rem; }
.key { display: inline-flex; align-items: center; gap: 0.4rem; }
.key-dot { width: 10px; height: 10px; border-radius: 50%; }
.table-toggle { margin-top: 0.5rem; font-size: 0.88rem; }
.table-toggle summary { cursor: pointer; }

.chart { display: block; width: 100%; min-width: 560px; height: auto; font-family: var(--font-text); }
.chart .grid { stroke: #e3e7ec; stroke-width: 1; }
.chart .grid-strong { stroke: #97a1b0; }
.chart .baseline { stroke: #b3bbc6; stroke-width: 1; }
.chart .axis-label { font-size: 12px; fill: var(--muted); }
.chart .row-label { font-size: 13px; fill: var(--ink); }
.chart .value-label { font-size: 13px; font-weight: 600; fill: var(--ink-2); }
.chart .connector { stroke: #c3c9d2; stroke-width: 2; }
.chart .dot { stroke: var(--surface); stroke-width: 2; }
.chart .row-hit { fill: transparent; }
.chart g:hover .row-hit, .chart g:focus .row-hit { fill: rgba(42, 120, 214, 0.08); }
.chart g:focus { outline: none; }
.chart g:focus-visible .row-label { text-decoration: underline; }

.timetable.heat { font-size: 1rem; }
.timetable.heat td.value { padding: 0.45rem 0.3rem; }

.facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.35rem 1.5rem;
  max-width: 40rem;
  margin: 0;
}
.facts dt { color: var(--ink-2); }
.facts dd { margin: 0; font-family: var(--font-sign); font-weight: 600; text-align: right; }

/* ------------------------------------------------------------ footer */

.site-footer { margin-top: 3rem; background: var(--ink); color: #dce3ec; }
.footer-inner { max-width: 72rem; margin: 0 auto; padding: 2rem 1.25rem 2.5rem; font-size: 0.88rem; }
.site-footer a { color: #fff; }
.site-footer a:hover { color: var(--sign-yellow); }
.site-footer .stand { color: #dce3ec; }
.footer-title {
  margin: 0.5rem 0 0.5rem;
  font-family: var(--font-sign);
  font-size: 1.1rem;
  color: #fff;
}
.sources { display: grid; gap: 0.25rem; margin: 0; padding-left: 1.1rem; }
.licence { margin-top: 1rem; }

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}