:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #60a5fa;
  --accent-2: #3b82f6;
  --ok: #4ade80;
  --danger: #f87171;
  --border: #334155;
  --radius: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { padding-bottom: calc(64px + env(safe-area-inset-bottom)); }
a { color: var(--accent); }
h1, h2, h3, h4 { margin: 0.2em 0 0.5em; font-weight: 650; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.center { text-align: center; }
.mono { font-variant-numeric: tabular-nums; }
.error { color: var(--danger); min-height: 1.2em; margin: 0.4em 0; }
.ok { color: var(--ok); }

#topbar { position: sticky; top: 0; z-index: 5; display: flex; justify-content: space-between; align-items: center; padding: calc(8px + env(safe-area-inset-top)) 16px 8px; background: rgba(15, 23, 42, 0.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.brand img { border-radius: 6px; }
.who { font-size: 0.9rem; color: var(--muted); display: flex; gap: 8px; align-items: center; }

main { max-width: 760px; margin: 0 auto; padding: 16px; }
.view > h2 { margin-top: 0.3em; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin: 12px 0; }
.card.auth { max-width: 420px; margin: 8vh auto; text-align: left; }
.card.auth .logo { display: block; margin: 0 auto 8px; border-radius: 14px; }
.card.auth h1 { text-align: center; }

label { display: block; margin: 10px 0; font-size: 0.95rem; color: var(--muted); }
label small { display: block; margin-top: 4px; }
input:not([type="checkbox"]):not([type="range"]):not([type="file"]), select, textarea {
  display: block; width: 100%; margin-top: 4px; padding: 10px 12px; font: inherit; color: var(--text);
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
}
input[type="file"] { margin-top: 6px; color: var(--muted); }
input:disabled { opacity: 0.6; }
label.check { display: flex; align-items: center; gap: 10px; color: var(--text); }
label.check input { width: 20px; height: 20px; }

button { font: inherit; padding: 9px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel-2); color: var(--text); cursor: pointer; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent-2); border-color: var(--accent-2); color: #fff; font-weight: 600; }
button.small { padding: 6px 10px; font-size: 0.9rem; }
button.link { background: none; border: none; color: var(--accent); padding: 4px 6px; }
button.danger { color: var(--danger); border-color: var(--danger); background: none; }
button.round { width: 48px; height: 48px; border-radius: 50%; font-size: 1.2rem; padding: 0; }
form button[type="submit"].primary { width: 100%; margin-top: 8px; }
.row { display: flex; align-items: center; }
.row.between { justify-content: space-between; }
.row.gap { gap: 8px; }
.row.wrap { flex-wrap: wrap; }

.list { display: flex; flex-direction: column; gap: 10px; }
.obra-item { display: block; width: 100%; text-align: left; padding: 14px 16px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--border); }
.obra-item strong { display: block; font-size: 1.05rem; }
.obra-item .meta { color: var(--muted); font-size: 0.9rem; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; background: var(--panel-2); font-size: 0.8rem; margin-right: 4px; }
.badge.mine { background: var(--accent-2); color: #fff; }

.transport { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.transport input[type="range"] { flex: 1; }
.pista { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: center; padding: 8px 0; border-top: 1px solid var(--border); }
.pista .nombre { font-weight: 600; }
.pista .nombre small { display: block; color: var(--muted); font-weight: 400; }
.pista.mine .nombre { color: var(--accent); }
.pista input[type="range"] { grid-column: 1 / -1; width: 100%; }
.pista button { min-width: 44px; }
.pista button.on { background: var(--accent-2); border-color: var(--accent-2); color: #fff; }
.pista button.muted-on { background: var(--danger); border-color: var(--danger); color: #fff; }
input[type="range"] { accent-color: var(--accent); }

#pdf-pages canvas { display: block; width: 100%; height: auto; background: #fff; margin: 0 auto 8px; border-radius: 4px; }
#pdf-box { margin-top: 8px; }

table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td .check { white-space: nowrap; }
.scroll { overflow-x: auto; }
.total { font-size: 1.15rem; font-weight: 700; }
.pagado { color: var(--ok); }
.pendiente { color: #fbbf24; }

#tabs { position: fixed; bottom: 0; left: 0; right: 0; display: flex; background: var(--panel); border-top: 1px solid var(--border); padding-bottom: env(safe-area-inset-bottom); z-index: 5; }
#tabs button { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 8px 4px; border: none; border-radius: 0; background: none; color: var(--muted); font-size: 1.2rem; }
#tabs button span { font-size: 0.72rem; }
#tabs button.active { color: var(--accent); }

dialog { background: var(--panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; width: min(92vw, 520px); }
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
dialog ul { padding-left: 18px; margin: 4px 0 8px; }
dialog ul li { margin: 4px 0; }
dialog ul li button { padding: 2px 8px; font-size: 0.8rem; margin-left: 6px; }

#toast { position: fixed; left: 50%; bottom: 84px; transform: translateX(-50%); background: #0b1222; color: var(--text); border: 1px solid var(--accent); padding: 10px 16px; border-radius: 10px; z-index: 10; max-width: 90vw; }
details summary { cursor: pointer; font-weight: 600; }