:root {
  --bg: #f2f3f5;
  --card: #ffffff;
  --text: #1c1c1e;
  --muted: #7a7e85;
  --line: #e4e6ea;
  --accent: #2688eb;
  --accent-soft: #e6f1fc;
  --danger: #e5484d;
  --danger-soft: #fdecec;
  --warn: #e8a317;
  --warn-soft: #fff5db;
  --ok: #2ea55f;
  --ok-soft: #e6f6ec;
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
:root[data-theme="dark"] {
  --bg: #0f1012;
  --card: #1c1d21;
  --text: #f1f2f4;
  --muted: #9a9ea6;
  --line: #2c2e33;
  --accent: #4a9df2;
  --accent-soft: #1b2c3f;
  --danger-soft: #3a1f21;
  --warn-soft: #3a2f16;
  --ok-soft: #173225;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font); font-size: 15px; line-height: 1.4;
  color: var(--text); background: var(--bg);
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(64px + env(safe-area-inset-bottom));
}
a { color: var(--accent); text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--card); outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
textarea { min-height: 84px; resize: vertical; }
label.f { display: block; margin: 10px 0 0; font-size: 13px; color: var(--muted); }
label.f > input, label.f > select, label.f > textarea { margin-top: 4px; }
.hint { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

/* header / nav */
.top {
  position: sticky; top: 0; z-index: 20; background: var(--card); border-bottom: 1px solid var(--line);
  padding: 10px 16px; display: flex; align-items: center; gap: 10px;
}
.top h1 { font-size: 17px; font-weight: 600; margin: 0; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.top .back { border: 0; background: none; padding: 4px 8px 4px 0; color: var(--accent); font-size: 15px; }
.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; display: flex;
  background: var(--card); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
}
.tabs button {
  flex: 1; border: 0; background: none; padding: 8px 0 6px; color: var(--muted); font-size: 11.5px;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.tabs button.active { color: var(--accent); }
.tabs svg { width: 24px; height: 24px; }

.page { padding: 12px 16px; max-width: 900px; margin: 0 auto; }
.card { background: var(--card); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 12px; }
.card h3 { margin: 0 0 10px; font-size: 15px; font-weight: 600; }
.row { display: flex; gap: 10px; align-items: center; }
.row.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.right { text-align: right; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.mt { margin-top: 12px; }
.pre { white-space: pre-wrap; word-break: break-word; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 16px; border-radius: 12px; border: 1px solid transparent; cursor: pointer;
  background: var(--accent); color: #fff; font-weight: 600; font-size: 15px; line-height: 1.2;
}
.btn.sec { background: var(--accent-soft); color: var(--accent); }
.btn.ghost { background: transparent; border-color: var(--line); color: var(--text); font-weight: 500; }
.btn.danger { background: var(--danger-soft); color: var(--danger); }
.btn.ok { background: var(--ok-soft); color: var(--ok); }
.btn.sm { padding: 7px 12px; font-size: 13.5px; border-radius: 10px; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .55; cursor: default; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.actions .btn { flex: 1 1 45%; }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  padding: 6px 11px; border-radius: 999px; border: 1px solid var(--line); background: var(--card);
  font-size: 13px; cursor: pointer; user-select: none;
}
.chip.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; white-space: nowrap; }
.badge.cat { color: #fff; }
.badge.st-new { background: var(--accent-soft); color: var(--accent); }
.badge.st-transferred { background: var(--warn-soft); color: #9a6a00; }
.badge.st-extended { background: var(--warn-soft); color: #9a6a00; }
.badge.st-resolved { background: var(--ok-soft); color: var(--ok); }
.badge.st-closed { background: var(--line); color: var(--muted); }
:root[data-theme="dark"] .badge.st-transferred, :root[data-theme="dark"] .badge.st-extended { color: #f2c46b; }

/* counters */
.counters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.counter { background: var(--card); border-radius: var(--radius); padding: 10px 12px; cursor: pointer; border: 1px solid transparent; }
.counter.on { border-color: var(--accent); }
.counter .n { font-size: 22px; font-weight: 700; }
.counter .l { font-size: 12px; color: var(--muted); }
.counter.overdue .n { color: var(--danger); }

/* list */
.item { display: block; background: var(--card); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 8px; color: inherit; }
.item .t { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; color: var(--muted); }
.item .s { margin: 4px 0; font-weight: 500; }
.item .m { display: flex; flex-wrap: wrap; gap: 6px 10px; font-size: 13px; color: var(--muted); align-items: center; }
.item .overdue { color: var(--danger); font-weight: 600; }
.search { display: flex; gap: 8px; margin-bottom: 10px; }
.filters { margin-bottom: 10px; }
.filters .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
@media (max-width: 420px) { .filters .grid { grid-template-columns: 1fr; } }

/* key-value */
.kv { display: grid; grid-template-columns: 130px 1fr; gap: 6px 10px; font-size: 14px; }
.kv .k { color: var(--muted); }
@media (max-width: 420px) { .kv { grid-template-columns: 1fr; gap: 2px; } .kv .k { font-size: 12px; } .kv .v { margin-bottom: 6px; } }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 50; display: flex; align-items: flex-end; justify-content: center; }
.modal { background: var(--card); width: 100%; max-width: 640px; max-height: 92vh; overflow: auto; border-radius: 18px 18px 0 0; padding: 16px 16px calc(16px + env(safe-area-inset-bottom)); }
@media (min-width: 700px) { .modal-bg { align-items: center; } .modal { border-radius: 18px; } }
.modal h3 { margin: 0 0 8px; font-size: 17px; }
.modal .foot { display: flex; gap: 8px; margin-top: 14px; }
.modal .foot .btn { flex: 1; }

/* alerts */
.alert { padding: 10px 12px; border-radius: 10px; font-size: 13.5px; margin-top: 8px; }
.alert.warn { background: var(--warn-soft); color: #8a5a00; }
.alert.err { background: var(--danger-soft); color: var(--danger); }
.alert.ok { background: var(--ok-soft); color: var(--ok); }
:root[data-theme="dark"] .alert.warn { color: #f2c46b; }
.toast { position: fixed; left: 50%; bottom: 80px; transform: translateX(-50%); background: #2b2d31; color: #fff; padding: 10px 16px; border-radius: 12px; z-index: 60; font-size: 14px; max-width: 90vw; }

/* history */
.ev { padding: 8px 0; border-top: 1px solid var(--line); font-size: 13.5px; }
.ev:first-child { border-top: 0; }
.ev .who { color: var(--muted); font-size: 12.5px; }

/* tables */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 12.5px; }
.center { text-align: center; padding: 40px 16px; color: var(--muted); }
.spinner { display: inline-block; width: 22px; height: 22px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: sp .8s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }
.switch { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.switch input { width: auto; }