/*
  style.css - HOW THE PAGE LOOKS
  ------------------------------
  1. Variables (colours, spacing) in :root, so we change them in ONE place
  2. Layout: a two-column grid (left = search + results, right = map)
  3. Components: buttons, form fields, result cards, tables
  4. High-contrast mode + small screens
*/

/* ===== 1. VARIABLES ===== */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1d232b;
  --muted: #5b6573;
  --border: #dde1e6;
  --accent: #1f4e8c;       /* main blue */
  --accent-soft: #e8eef7;
  --good: #1b7a3d;
  --warn: #9a5b00;
  --radius: 8px;
  --font: "Segoe UI", "Nirmala UI", "Noto Sans Kannada", system-ui, -apple-system, sans-serif;
}

/* High-contrast mode: app.js adds class="high-contrast" to <body> */
body.high-contrast {
  --bg: #000;
  --surface: #000;
  --text: #fff;
  --muted: #e6e6e6;
  --border: #fff;
  --accent: #ffd400;
  --accent-soft: #222;
  --good: #7dff9b;
  --warn: #ffd400;
}

/* ===== 2. BASE + LAYOUT ===== */
* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
}

h1, h2, h3 { margin: 0; line-height: 1.25; }
h1 { font-size: 1.35rem; }
h2 { font-size: 1.05rem; }
h3 { font-size: 0.95rem; margin-bottom: 6px; }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.subtitle { margin: 2px 0 0; color: var(--muted); font-size: 0.9rem; }
.header-tools { display: flex; align-items: center; gap: 8px; }

.notice {
  margin: 0;
  padding: 8px 28px;
  font-size: 0.85rem;
  color: var(--warn);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

/* The main 2-column grid: fixed-width left panel, map takes the rest */
.layout {
  display: grid;
  grid-template-columns: 430px 1fr;
  gap: 20px;
  padding: 20px 28px;
  align-items: start;
}

.panel { display: flex; flex-direction: column; gap: 16px; }
.layout > * { min-width: 0; }   /* lets grid columns shrink instead of overflowing */

.search-form, .results, .details, .map-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

/* Map stays visible while you scroll the results */
.map-panel { position: sticky; top: 20px; padding: 8px; }
#map { height: calc(100vh - 210px); min-height: 420px; border-radius: 6px; background: var(--accent-soft); }
.map-note { margin: 6px 4px 0; font-size: 0.8rem; color: var(--muted); }

.site-footer { padding: 10px 28px 24px; font-size: 0.8rem; color: var(--muted); }

/* ===== 3. COMPONENTS ===== */

/* Form */
.search-form { display: grid; gap: 10px; }
.field { display: grid; gap: 4px; }
.field.inline { display: flex; align-items: center; gap: 8px; }
label { font-size: 0.85rem; font-weight: 600; color: var(--muted); }

select {
  font: inherit;
  padding: 8px 10px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}

/* Buttons */
button { font: inherit; cursor: pointer; }
.btn-primary {
  padding: 10px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 6px;
}
body.high-contrast .btn-primary { color: #000; }
.btn-primary:hover { filter: brightness(1.1); }

.btn-plain {
  padding: 6px 10px;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
}
.btn-plain:hover, .btn-plain[aria-pressed="true"] { background: var(--accent-soft); }
.swap { justify-self: start; font-size: 0.85rem; }

/* Visible focus ring for keyboard users (accessibility) */
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.badge {
  padding: 3px 8px;
  font-size: 0.78rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 99px;
}

/* Results */
.results-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 8px; }
.message { color: var(--muted); font-size: 0.9rem; }
.message:empty { display: none; }

.options { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }

.option-card {
  width: 100%;
  text-align: left;
  padding: 12px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.option-card:hover { border-color: var(--accent); }
.option-card[aria-pressed="true"] { border: 2px solid var(--accent); background: var(--accent-soft); }

.option-head { display: flex; justify-content: space-between; align-items: baseline; }
.option-time { font-size: 1.15rem; font-weight: 700; }
.option-fare { font-size: 1.05rem; font-weight: 700; }
.option-meta { font-size: 0.82rem; color: var(--muted); }

/* Little coloured "Bus 101" / "Green Line" chips */
.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; margin-top: 6px; }
.chip {
  display: inline-block;
  padding: 1px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: #fff;
  border-radius: 4px;
}
body.high-contrast .chip { outline: 1px solid #fff; }
.arrow { color: var(--muted); font-size: 0.8rem; }

/* Details: step-by-step timeline */
.details { display: grid; gap: 16px; }
.steps { list-style: none; margin: 0; padding: 0; }
.step {
  position: relative;
  padding: 0 0 12px 18px;
  border-left: 4px solid var(--line, var(--border));
}
.step:last-child { padding-bottom: 0; }
.step-title { font-weight: 600; }
.step-meta { font-size: 0.83rem; color: var(--muted); }
.end { font-weight: 600; padding-left: 22px; }
.small { font-size: 0.83rem; color: var(--muted); margin: 6px 0 0; }

.status { padding: 8px 10px; border-radius: 6px; font-size: 0.88rem; background: var(--accent-soft); }
.status.good { color: var(--good); }
.status.warn { color: var(--warn); }

/* Facilities table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
th, td { padding: 5px 4px; text-align: center; border-bottom: 1px solid var(--border); }
th:first-child, td:first-child { text-align: left; }
th { color: var(--muted); font-weight: 600; }
.yes { color: var(--good); font-weight: 700; }
.no { color: var(--muted); }

ul.plain { margin: 0; padding-left: 18px; font-size: 0.88rem; }

/* Hidden visually but still read by screen readers */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.skip-link { position: absolute; left: -999px; top: 8px; padding: 8px 12px; background: var(--accent); color: #fff; z-index: 2000; }
.skip-link:focus { left: 8px; }

/* ===== 4. SMALLER SCREENS (desktop-first, so this comes last) ===== */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 16px; }
  .map-panel { position: static; }
  #map { height: 360px; min-height: 0; }
  .site-header { flex-wrap: wrap; padding: 12px 16px; }
  .notice, .site-footer { padding-left: 16px; padding-right: 16px; }
}