:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #16202c;
  --muted: #667085;
  --line: #e3e6ea;
  --brand: #0f172a;
  --accent: #1d6fe0;
  --ok: #17864a;
  --warn: #b7791f;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216; --card: #191d23; --ink: #e8ebee;
    --muted: #98a2b3; --line: #2a2f37; --brand: #0b0e12; --accent: #4c9dff;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--ink);
  padding-bottom: env(safe-area-inset-bottom);
}
a { color: var(--accent); text-decoration: none; }
h1 { font-size: 1.3rem; margin: 0 0 .7rem; }
h3 { margin: 1rem 0 .3rem; }
hr { border: none; border-top: 1px solid var(--line); margin: 1.2rem 0; }
.muted { color: var(--muted); }
.small { font-size: .82rem; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  gap: .5rem; padding: .6rem .9rem;
  padding-top: calc(.6rem + env(safe-area-inset-top));
  background: var(--brand); color: #fff;
}
.brand { color: #fff; font-weight: 700; letter-spacing: .02em; }
.topbar-right { display: flex; align-items: center; gap: .35rem; }
.icon-btn {
  background: rgba(255,255,255,.12); color: #fff; border: 0;
  width: 34px; height: 34px; border-radius: 9px; font-size: 1rem;
  display: grid; place-items: center; cursor: pointer;
}
#sync-btn.spin { animation: spin 0.8s linear infinite; pointer-events: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.pill {
  font-size: .72rem; padding: .15rem .5rem; border-radius: 999px;
  background: rgba(255,255,255,.15); text-transform: uppercase; letter-spacing: .04em;
}
.pill[data-state="offline"] { background: var(--warn); }
.pill[data-state="demo"] { background: #6d28d9; }

main { padding: 1rem; max-width: 820px; margin: 0 auto; }
.loading { padding: 3rem; text-align: center; color: var(--muted); }
.error { background: #fdecec; color: #a12; padding: 1rem; border-radius: var(--radius); }
@media (prefers-color-scheme: dark) { .error { background: #3a1e1e; color: #f3b4b4; } }

.back { display: inline-block; margin-bottom: .6rem; }
.banner {
  background: var(--warn); color: #fff; padding: .6rem .8rem;
  border-radius: 10px; margin-bottom: .8rem; cursor: pointer; font-weight: 600;
}

/* add-to-home-screen */
.install-bar {
  display: flex; align-items: center; justify-content: space-between; gap: .6rem;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: .55rem .7rem; margin-bottom: .8rem; font-weight: 600;
}
.install-bar a { color: var(--ink); }
.install-actions { display: flex; gap: .4rem; flex-shrink: 0; }
button.sm, .btn.sm { min-height: 34px; padding: .35rem .7rem; border-radius: 8px; font-size: .85rem; }
.installpage h2 { font-size: 1rem; margin: 1.3rem 0 .5rem; }
.install-hero { display: block; margin: .8rem 0 1rem; border-radius: 20px; }
.ok-note { color: #16a34a; font-weight: 600; }
.steps { list-style: none; padding: 0; margin: 0; counter-reset: none; }
.step { display: flex; gap: .7rem; align-items: flex-start; padding: .55rem 0; border-bottom: 1px solid var(--line); line-height: 1.5; }
.step:last-child { border-bottom: 0; }
.step-n {
  flex-shrink: 0; width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; font-size: .85rem;
  display: grid; place-items: center;
}
.ios-share { vertical-align: -5px; margin: 0 2px; }
.installpage details { margin-top: 1.2rem; }
.installpage summary { cursor: pointer; color: var(--accent); font-weight: 600; padding: .4rem 0; }

/* unit grid */
.grid {
  display: grid; gap: .8rem;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
.tile {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; color: var(--ink); display: flex; flex-direction: column;
}
.tile-img {
  aspect-ratio: 4/3; background: #dfe3e8 center/cover no-repeat;
  display: grid; place-items: center;
}
@media (prefers-color-scheme: dark) { .tile-img { background-color: #242a31; } }
.tile-icon { width: 46%; opacity: .8; }
.tile-name { font-weight: 700; padding: .5rem .6rem 0; }
.tile-loc { font-size: .8rem; color: var(--muted); padding: .1rem .6rem .6rem; }

/* unit header */
.unit-head { display: flex; gap: .9rem; align-items: center; margin-bottom: 1rem; }
.unit-photo {
  width: 96px; height: 96px; object-fit: cover; border-radius: 12px;
  background: #dfe3e8; flex: none;
}

/* "on file" card — carried spec (filter size/qty/MERV) for ordering */
.speccard {
  border: 1px solid var(--line); background: var(--card);
  border-radius: var(--radius); padding: .7rem .9rem; margin-bottom: 1rem;
}
.speccard.muted { color: var(--muted); font-size: .9rem; }
.speccard-h {
  font-weight: 700; font-size: .72rem; text-transform: uppercase;
  letter-spacing: .04em; color: var(--muted); margin-bottom: .4rem;
}
.speccard-row { display: flex; justify-content: space-between; gap: 1rem; padding: .22rem 0; }
.speccard-row span { color: var(--muted); }
.speccard-f { font-size: .76rem; color: var(--muted); margin-top: .45rem; }

/* form */
.logform fieldset {
  border: 1px solid var(--line); border-radius: var(--radius);
  margin: 0 0 .9rem; padding: .4rem .9rem .9rem; background: var(--card);
}
.logform legend { font-weight: 700; padding: 0 .4rem; }

/* one checklist row: task | control | comment.
   Phone: task + control on line 1, comment wraps full-width below.
   >=620px: all three inline like a table row. */
.row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: .4rem .7rem;
  padding: .6rem 0;
  border-top: 1px solid var(--line);
}
.row:first-of-type { border-top: 0; }
.row .task { font-weight: 600; }
.row .cmt { grid-column: 1 / -1; }
.chk {
  width: 24px; height: 24px; flex: none; margin: 0;
  accent-color: var(--accent); cursor: pointer;
}
/* primary control + N/A checkbox, sitting in the row's middle cell */
.marks { display: flex; align-items: center; gap: .7rem; flex-wrap: wrap; justify-content: flex-end; }
.mk { display: inline-flex; align-items: center; gap: .3rem; font-size: .8rem; color: var(--muted); cursor: pointer; }
.mk.na .chk { accent-color: var(--muted); }
.numwrap { display: flex; align-items: center; gap: .4rem; }
.numwrap input { width: 6.5rem; }
.unit { color: var(--muted); }
.textrow, .photorow { grid-template-columns: 1fr; }
.textrow .task, .photorow .task { margin-bottom: .3rem; }

/* single-select segmented control (e.g. VFD status) */
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.seg button {
  border: 0; border-radius: 0; min-height: 40px; padding: .45rem .9rem;
  background: var(--card); color: var(--ink); font-size: .92rem;
}
.seg button + button { border-left: 1px solid var(--line); }
.seg button.on { background: var(--accent); color: #fff; font-weight: 600; }

@media (min-width: 620px) {
  .row { grid-template-columns: 220px auto 1fr; }
  .row.textrow { grid-template-columns: 220px 1fr; }
  .row.photorow { grid-template-columns: 220px 1fr; }
  .row .cmt { grid-column: auto; }
  .marks { justify-content: flex-start; }
}
input, textarea, select {
  font: inherit; color: var(--ink); background: var(--card);
  border: 1px solid var(--line); border-radius: 10px; padding: .55rem .6rem; width: 100%;
}
input[type="file"] { padding: .4rem; }
textarea { resize: vertical; }

.shots { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .5rem; }
.shots img {
  width: 96px; height: 96px; object-fit: cover; border-radius: 10px; border: 1px solid var(--line);
}

.formbar { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1rem; }
button, .btn {
  font: inherit; cursor: pointer; border-radius: 10px; padding: .7rem 1.1rem;
  border: 1px solid var(--line); background: var(--card); color: var(--ink); min-height: 44px;
}
.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.ghost { background: transparent; }
.danger { background: transparent; border-color: #c0392b; color: #c0392b; }
button:disabled { opacity: .6; }

/* lists / tables */
.loglist { list-style: none; padding: 0; margin: .6rem 0 0; }
.loglist li { border-bottom: 1px solid var(--line); }
.loglist a {
  display: flex; gap: .7rem; align-items: center; flex-wrap: wrap;
  padding: .75rem .2rem; color: var(--ink);
}
.tag {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .04em;
  padding: .1rem .45rem; border-radius: 6px; background: var(--line); color: var(--muted);
}
.tag.ok { background: #dcf1e4; color: var(--ok); }
@media (prefers-color-scheme: dark) { .tag.ok { background: #14351f; } }

table.kv { width: 100%; border-collapse: collapse; margin-top: .8rem; }
table.kv th, table.kv td {
  text-align: left; padding: .55rem .4rem; border-bottom: 1px solid var(--line); vertical-align: top;
}
table.kv tbody th { font-weight: 600; color: var(--muted); width: 40%; }
table.kv thead th {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted);
}
table.kv td.mark {
  min-width: 3.5rem; text-align: center; font-weight: 700;
  color: var(--ok); white-space: nowrap;
}
table.kv td.mark.warn { color: var(--warn); }
table.kv td.cmt { white-space: pre-wrap; }

.loginbox { display: grid; gap: .5rem; max-width: 320px; }
.notes p { white-space: pre-wrap; }

/* calendar */
.cal-head { display: flex; align-items: center; gap: .4rem; margin-bottom: .7rem; }
.cal-head select { flex: 1; padding: .55rem .4rem; }
.cal-nav {
  min-height: 44px; padding: .4rem .8rem; font-size: 1.2rem; line-height: 1;
  background: var(--card);
}
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; touch-action: pan-y; }
.cal-dow {
  text-align: center; font-size: .68rem; text-transform: uppercase;
  letter-spacing: .03em; color: var(--muted); padding: .25rem 0;
}
.cal-cell {
  min-height: 66px; border: 1px solid var(--line); border-radius: 8px;
  padding: 3px 4px; background: var(--card); color: var(--ink);
  display: flex; flex-direction: column; gap: 1px; overflow: hidden;
}
.cal-cell.empty { background: transparent; border: 0; }
.cal-cell.has { border-color: var(--accent); }
.cal-cell.today { outline: 2px solid var(--accent); outline-offset: -2px; }
.cal-num { font-size: .72rem; font-weight: 600; color: var(--muted); }
.cal-cell.today .cal-num { color: var(--accent); }
.cal-u {
  font-size: .6rem; line-height: 1.25; background: var(--accent); color: #fff;
  border-radius: 3px; padding: 0 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.cal-more { font-size: .58rem; color: var(--muted); }