:root {
  --bg: #f4f2ee; --panel: #ffffff; --ink: #1b1d22; --muted: #646a75; --line: #e2ded6;
  --accent: #1f5fd1; --accent-ink: #ffffff; --ok: #15803d; --warn: #b45309; --bad: #c0262d; --info: #475569;
  --chip: #eef0f4; --sim: #7c3aed; --shadow: 0 1px 2px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
  --radius: 12px; --font: "Inter", system-ui, -apple-system, "Segoe UI", "Noto Sans Tamil", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121418; --panel: #1b1e24; --ink: #eceef2; --muted: #9aa1ad; --line: #2b2f37; --chip: #262a32;
    --accent: #6b9cff; --accent-ink: #0b1020; --ok: #4ade80; --warn: #fbbf24; --bad: #f87171; --info: #94a3b8;
  }
}
:root[data-theme="dark"] {
  --bg: #121418; --panel: #1b1e24; --ink: #eceef2; --muted: #9aa1ad; --line: #2b2f37; --chip: #262a32;
  --accent: #6b9cff; --accent-ink: #0b1020; --ok: #4ade80; --warn: #fbbf24; --bad: #f87171; --info: #94a3b8;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); font-size: 15px; line-height: 1.45; }
a { color: var(--accent); }
h1 { font-size: 1.35rem; margin: 0 0 .25rem; letter-spacing: -.01em; }
h2 { font-size: 1.05rem; margin: 1.2rem 0 .5rem; }
h3 { font-size: .95rem; margin: .8rem 0 .4rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.mono { font-variant-numeric: tabular-nums; }

/* shell */
.topbar { position: sticky; top: 0; z-index: 1000; display: flex; align-items: center; gap: .75rem; padding: .6rem 1rem;
  background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; letter-spacing: .02em; white-space: nowrap; }
.brand b { color: var(--accent); }
.nav { display: flex; gap: .25rem; overflow-x: auto; flex: 1; scrollbar-width: none; }
.nav a { padding: .4rem .7rem; border-radius: 8px; color: var(--muted); text-decoration: none; white-space: nowrap; font-size: .9rem; }
.nav a.on { background: var(--chip); color: var(--ink); font-weight: 600; }
.user { font-size: .85rem; color: var(--muted); white-space: nowrap; }
main { padding: 1rem; max-width: 1400px; margin: 0 auto; }
.banner { padding: .5rem 1rem; font-size: .85rem; background: color-mix(in srgb, var(--sim) 14%, var(--panel)); color: var(--ink);
  border-bottom: 1px solid color-mix(in srgb, var(--sim) 40%, transparent); }
.banner b { color: var(--sim); }

/* blocks */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.grid { display: grid; gap: 1rem; }
.g2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
.g3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.split { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(320px, 1fr); gap: 1rem; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: .6rem; margin: .75rem 0 1rem; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: .6rem .75rem; cursor: default; }
.kpi[data-filter] { cursor: pointer; }
.kpi.on { outline: 2px solid var(--accent); }
.kpi .v { font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.kpi .l { font-size: .78rem; color: var(--muted); }
.row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
#map, .map { height: 62vh; min-height: 360px; border-radius: var(--radius); border: 1px solid var(--line); z-index: 0; }
.map.short { height: 42vh; min-height: 280px; }

/* tables */
.tbl { width: 100%; border-collapse: collapse; font-size: .88rem; }
.tbl th { text-align: left; font-weight: 600; color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .03em;
  padding: .45rem .5rem; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--panel); }
.tbl td { padding: .45rem .5rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl tr.click { cursor: pointer; }
.tbl tr.click:hover td { background: var(--chip); }
.scroll { overflow: auto; max-height: 62vh; }
.num { text-align: right; font-variant-numeric: tabular-nums; }

/* chips */
.chip { display: inline-flex; align-items: center; gap: .3rem; padding: .1rem .5rem; border-radius: 99px; font-size: .76rem;
  background: var(--chip); color: var(--ink); white-space: nowrap; font-weight: 500; }
.chip.ok { background: color-mix(in srgb, var(--ok) 16%, var(--panel)); color: var(--ok); }
.chip.warn { background: color-mix(in srgb, var(--warn) 16%, var(--panel)); color: var(--warn); }
.chip.bad { background: color-mix(in srgb, var(--bad) 16%, var(--panel)); color: var(--bad); }
.chip.sim { background: color-mix(in srgb, var(--sim) 16%, var(--panel)); color: var(--sim); }
.chip.info { background: color-mix(in srgb, var(--info) 16%, var(--panel)); color: var(--info); }

/* forms */
input, select, textarea { font: inherit; color: var(--ink); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: .45rem .6rem; }
textarea { width: 100%; min-height: 70px; }
label { display: grid; gap: .2rem; font-size: .82rem; color: var(--muted); }
.form { display: grid; gap: .6rem; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
button, .btn { font: inherit; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: .45rem .8rem; border-radius: 8px;
  cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: .35rem; }
button.primary, .btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
button.danger { background: var(--bad); border-color: var(--bad); color: #fff; }
button:disabled { opacity: .45; cursor: not-allowed; }
button.big { font-size: 1.15rem; padding: 1rem 1.2rem; border-radius: 12px; width: 100%; justify-content: center; font-weight: 600; }
.bigbtns { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .6rem; }

/* pins */
.pin-wrap { background: none; border: 0; }
.pin { width: 26px; height: 26px; border-radius: 50%; background: var(--pin); border: 2px solid #fff; box-shadow: 0 1px 4px rgba(0,0,0,.35);
  display: grid; place-items: center; color: #fff; font-size: 10px; font-weight: 700; }
.pin.stale { opacity: .55; border-style: dashed; }
.pin.lost { background: repeating-linear-gradient(45deg, #888, #888 4px, #bbb 4px, #bbb 8px); }
.pin.stop { width: 16px; height: 16px; font-size: 0; }
.pin.square { border-radius: 4px; }

/* capacity bars */
.cap { display: grid; gap: 3px; }
.cap .bar { display: grid; grid-template-columns: 9.5rem 1fr 4.5rem; gap: .5rem; align-items: center; font-size: .8rem; }
.cap .track { height: 14px; background: var(--chip); border-radius: 4px; position: relative; overflow: hidden; }
.cap .fill { position: absolute; inset: 0 auto 0 0; background: var(--accent); border-radius: 4px; }
.cap .fill.new { background: var(--ok); }
.cap .fill.full { background: var(--bad); }

/* manifest (bus leader) */
.person { display: flex; align-items: center; gap: .5rem; padding: .6rem 0; border-bottom: 1px solid var(--line); }
.person .nm { flex: 1; }
.person button { min-width: 88px; justify-content: center; padding: .65rem .7rem; }
.stopblock { margin-bottom: .75rem; }
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 3.5rem 1fr; gap: .5rem; padding: .3rem 0; border-bottom: 1px dashed var(--line); font-size: .88rem; }
.md { line-height: 1.55; }
.md table { border-collapse: collapse; margin: .5rem 0; font-size: .85rem; display: block; overflow-x: auto; }
.md td, .md th { border: 1px solid var(--line); padding: .25rem .45rem; }
.md blockquote { margin: .5rem 0; padding: .4rem .8rem; border-left: 3px solid var(--sim); background: var(--chip); }
.toast { position: fixed; bottom: 1rem; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: .6rem 1rem;
  border-radius: 10px; z-index: 5000; font-size: .9rem; max-width: 90vw; }
.login { max-width: 380px; margin: 10vh auto; }
dialog { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); color: var(--ink); max-width: 560px; width: 92vw; }
dialog::backdrop { background: rgba(0,0,0,.4); }
.check { display: flex; gap: .4rem; align-items: baseline; font-size: .85rem; }
.empty { padding: 2rem; text-align: center; color: var(--muted); }
@media (max-width: 640px) {
  main { padding: .6rem; }
  .user { display: none; }
  .topbar { flex-wrap: wrap; }
  .nav { order: 3; flex-basis: 100%; }
}

/* worker sign-in: code + PIN pad */
.login-tabs { gap: 8px; margin: 8px 0 14px; }
.login-tabs button { flex: 1; padding: 10px 6px; line-height: 1.2; }
.bigcode { font-size: 1.4rem; text-transform: uppercase; letter-spacing: .05em; text-align: center; }
.pin-dots { display: flex; justify-content: center; gap: 14px; margin: 4px 0 8px; }
.pin-dots i { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--muted, #888); }
.pin-dots i.on { background: var(--accent, #1f5fd1); border-color: var(--accent, #1f5fd1); }
.keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.keypad button { font-size: 1.7rem; min-height: 64px; border-radius: 14px; }