:root { --action: #1a56db; --ink: #111; --muted: #555; --bg: #fff; --line: #ddd; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.5; }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: .75rem 1rem; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 1.2rem; color: var(--action); text-decoration: none; }
main { max-width: 44rem; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.5rem; }
.search label, .search legend { font-weight: 600; }
.search input[type="search"], .search input[type="text"], .search select { width: 100%; padding: .75rem; font-size: 1rem; margin: .25rem 0 .75rem; min-height: 44px; }
.search fieldset { border: 1px solid var(--line); margin: 0 0 .75rem; }
.search fieldset label { display: inline-block; margin-right: 1rem; padding: .5rem 0; min-height: 44px; }
button, .search button { background: var(--action); color: #fff; border: 0; padding: .8rem 1.2rem; font-size: 1rem; min-height: 44px; cursor: pointer; }
a { color: var(--action); }
.notice { border: 2px solid #b45309; background: #fef3c7; padding: .75rem; }
.freshness { color: var(--muted); font-size: .9rem; }
.stations { list-style: none; padding: 0; }
.stations li { border: 1px solid var(--line); padding: .75rem; margin-bottom: .5rem; }
footer { border-top: 1px solid var(--line); padding: 1rem; font-size: .85rem; color: var(--muted); }
.secondary { display: inline-block; padding: .8rem 0; }