/* ==================================================================
   MOVE·DETECT dashboard — light, calm, minimal.
   A safety board is calm most of the time and urgent rarely, so it stays
   near-monochrome with ONE interactive accent (indigo) and spends its only
   real color on the unacknowledged-critical alarm. Soft cards, generous
   whitespace, big tabular numbers.
   Air-gapped (폐쇄망): system fonts only, no external assets fetched at runtime.
   ================================================================== */
:root {
  color-scheme: light;

  --bg:#f5f6f8; --card:#ffffff; --line:#e7e9ee;
  --ink:#161a20; --ink-2:#5b636e; --ink-3:#949aa4;

  --accent:#4f46e5;                 /* indigo — only where you act (nav, links, focus) */
  --ok:#16a34a;                     /* "감시 중" live-monitoring green */

  /* Severity (reserved, semantic — never reused as a decorative color). Identity is
     always carried by a text label too (NF9: never color alone). */
  --crit:#dc2626; --high:#ea580c; --warn:#ca8a04; --info:#64748b;
  --crit-bg:#fdf3f3; --crit-line:#f4c9c9;

  --border:var(--line);             /* back-compat alias */
  --text:var(--ink);

  --font:system-ui,-apple-system,"Segoe UI","Malgun Gothic","Apple SD Gothic Neo",sans-serif;
  --mono:ui-monospace,"Cascadia Mono","Cascadia Code",Consolas,"D2Coding","Roboto Mono",monospace;
  --shadow:0 1px 2px rgba(20,24,31,.04), 0 8px 24px -18px rgba(20,24,31,.5);
}
* { box-sizing:border-box; }
body {
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.45;
  -webkit-font-smoothing:antialiased;
}

/* ---- Header ------------------------------------------------------ */
.app-header {
  display:flex; align-items:center; gap:1rem;
  padding:.85rem 1.6rem;
  background:var(--card); border-bottom:1px solid var(--line);
}
.app-brand { display:flex; align-items:center; gap:.55rem; font-weight:700; font-size:.98rem; letter-spacing:-.01em; }
/* Live-monitoring dot — the board is watching. Calm green, not an alarm. */
.live-dot { width:8px; height:8px; border-radius:50%; background:var(--ok); box-shadow:0 0 0 3px rgba(22,163,74,.14); flex:none; }
.brand-name { color:var(--ink); }
.brand-sub { display:none; }        /* the mono wordmark is gone; keep the hook harmless */

.app-nav { display:flex; gap:.2rem; margin-left:1.8rem; margin-right:auto; }
.app-nav a {
  position:relative;
  color:var(--ink-2); text-decoration:none;
  font-size:.87rem; font-weight:500;
  padding:.45rem .75rem; border-radius:8px;
}
.app-nav a:hover, .app-nav a:focus-visible { background:#f1f2f5; color:var(--ink); text-decoration:none; }
.app-nav a.is-active { color:var(--accent); }
.app-nav a.is-active::after {
  content:""; position:absolute; left:.75rem; right:.75rem; bottom:-.86rem; height:2px;
  background:var(--accent); border-radius:2px;
}
.app-session { display:flex; align-items:center; gap:.7rem; font-size:.85rem; color:var(--ink-2); }
.app-session .who { color:var(--ink); }
.app-session a { color:var(--accent); text-decoration:none; font-weight:500; }
.app-session a:hover { text-decoration:underline; text-underline-offset:3px; }

/* ---- Buttons / fields -------------------------------------------- */
button, .btn {
  font:inherit; font-size:.83rem; font-weight:500; cursor:pointer;
  padding:.42rem .8rem;
  color:var(--ink); background:#fff;
  border:1px solid var(--line); border-radius:9px;
  transition:transform .1s, background .15s, border-color .15s;
}
button:hover, .btn:hover { background:#f7f8fa; border-color:#dcdfe4; }
button:active, .btn:active { transform:scale(.98); }
:focus-visible { outline:2px solid var(--accent); outline-offset:2px; }

input, select {
  font:inherit; font-size:.9rem; color:var(--ink);
  padding:.5rem .65rem;
  background:#fff; border:1px solid var(--line); border-radius:9px;
}
input::placeholder { color:var(--ink-3); }
input:focus, select:focus { outline:2px solid var(--accent); outline-offset:1px; border-color:var(--accent); }
label { color:var(--ink-2); font-size:.85rem; }

/* ---- Page shell -------------------------------------------------- */
.app-main { max-width:1000px; margin:0 auto; padding:2rem 1.6rem 4rem; }
.page-head { display:flex; align-items:baseline; gap:.8rem; margin:0 0 .25rem; flex-wrap:wrap; }
h1 { font-size:1.5rem; font-weight:750; letter-spacing:-.025em; margin:.1rem 0 0; }
/* Live watch pill (set by app.js from poll health): green when polling, muted when stale.
   The dot is a ::before so app.js can freely overwrite the text via textContent. */
.watch { font-size:.82rem; font-weight:600; color:var(--ok); display:inline-flex; align-items:center; gap:.35rem; }
.watch::before { content:""; width:6px; height:6px; border-radius:50%; background:currentColor; flex:none; }
.watch.is-stale { color:var(--ink-3); }
.page-sub { color:var(--ink-3); font-size:.88rem; margin:.15rem 0 1.8rem; }

/* ---- Status strip: KPI tiles ------------------------------------- */
/* Unacknowledged counts per severity, computed client-side from the same /api/events
   array the list renders (no extra endpoint). Identity is a colored dot + a text label,
   never color alone (NF9). A zero tile dims but never hides, so the strip never reflows. */
.status-strip { display:grid; grid-template-columns:repeat(4,1fr); gap:.85rem; margin:0 0 2rem; }
.stat-tile {
  background:var(--card); border:1px solid var(--line); border-radius:14px;
  padding:1.05rem 1.15rem; box-shadow:var(--shadow);
}
.stat-tile .stat-label { display:flex; align-items:center; gap:.45rem; font-size:.79rem; font-weight:500; color:var(--ink-2); }
.stat-tile .stat-label .led { width:7px; height:7px; border-radius:50%; flex:none; background:var(--dot,#c4c9d0); }
.stat-tile .stat-label .icon { display:none; }   /* the dot carries the color; the emoji is dropped in this theme */
.stat-tile .stat-count {
  display:block; margin-top:.5rem;
  font-size:2.3rem; font-weight:730; letter-spacing:-.04em; line-height:1;
  color:var(--ink); font-variant-numeric:tabular-nums;
}
.stat-tile.is-zero { opacity:.62; }
.stat-tile.is-zero .stat-count { color:var(--ink-3); }
.tile-critical { --dot:var(--crit); }
.tile-high     { --dot:var(--high); }
.tile-warning  { --dot:var(--warn); }
.tile-info     { --dot:var(--info); }
/* The one moment of color: an unacknowledged critical tints its tile. */
.tile-critical:not(.is-zero) { background:var(--crit-bg); border-color:var(--crit-line); }
.tile-critical:not(.is-zero) .stat-count { color:var(--crit); }

/* ---- Device / camera health panel -------------------------------- */
/* Surfaces the heartbeat telemetry the edge already reports (online/offline, fps, temp,
   throttle, config drift). A dead camera is a safety blind spot; an offline card takes the
   same red the critical alarm does. State is never color alone — the "오프라인/응답 없음"
   text carries it too (NF9). */
.device-strip { display:flex; flex-wrap:wrap; gap:.6rem; margin:0 0 2rem; }
.device-strip.is-empty { color:var(--ink-3); font-size:.85rem; }
.device-card {
  flex:1 1 11rem; min-width:11rem;
  background:var(--card); border:1px solid var(--line); border-radius:12px;
  padding:.7rem .85rem; box-shadow:var(--shadow);
}
.device-card .device-name { display:flex; align-items:center; gap:.45rem; font-weight:600; font-size:.9rem; }
.device-card .device-name .dot { width:8px; height:8px; border-radius:50%; background:var(--ok); flex:none; }
.device-card .device-meta { margin-top:.3rem; font-family:var(--mono); font-size:.76rem; color:var(--ink-3); }
.device-card .device-warn { margin-top:.35rem; font-size:.72rem; font-weight:600; color:var(--warn); }
.device-card.is-offline { background:var(--crit-bg); border-color:var(--crit-line); }
.device-card.is-offline .device-name .dot { background:var(--crit); }
/* Device poll went stale (500 / WAF): dim the last-known cards and say so, never freeze silently. */
.device-strip.is-stale { opacity:.6; }
.device-stale-note { flex-basis:100%; font-size:.72rem; color:var(--ink-3); }
/* "new events arrived while paging" reload affordance — honest about a possible gap in the list. */
.page-gap-hint { display:flex; align-items:center; gap:.6rem; margin:0 0 .8rem; padding:.5rem .75rem;
  font-size:.8rem; color:var(--ink-2); background:var(--card); border:1px solid var(--line); border-radius:8px; }
.page-gap-hint[hidden] { display:none; }

/* ---- Event list: soft cards -------------------------------------- */
.event-row {
  display:flex; align-items:center; gap:1rem;
  background:var(--card); border:1px solid var(--line); border-radius:14px;
  padding:.95rem 1.15rem; margin-bottom:.6rem; box-shadow:var(--shadow);
}
/* An unacknowledged critical is the only row that takes color; the tint + red badge +
   "확인 필요" chip make it unmissable without shouting. */
.event-row.is-unacknowledged.sev-row-critical { background:var(--crit-bg); border-color:var(--crit-line); }

/* Evidence thumbnail (newest snapshot) — a small camera still on the left of the row. */
.event-thumb { width:64px; height:44px; object-fit:cover; border-radius:8px; border:1px solid var(--line); background:#0f1216; flex:none; }

.severity-badge { display:inline-flex; align-items:center; gap:.45rem; flex:none; min-width:66px; font-size:.84rem; font-weight:600; white-space:nowrap; }
/* app.js/detail.js build the badge as <span.icon>(emoji)</span><span.label>text</span>.
   In this theme the icon becomes a colored dot (emoji hidden) and the label carries identity. */
.severity-badge .icon { width:9px; height:9px; border-radius:50%; background:currentColor; font-size:0; line-height:0; }
.sev-critical { color:var(--crit); }
.sev-high     { color:var(--high); }
.sev-warning  { color:var(--warn); }
.sev-info     { color:var(--info); }

.event-meta { flex:1; min-width:0; }
.event-type { font-weight:650; font-size:1rem; letter-spacing:-.01em; display:flex; align-items:center; gap:.5rem; }
.event-time { margin-top:.2rem; font-family:var(--mono); font-size:.79rem; color:var(--ink-3); }
.event-detail-link { color:inherit; text-decoration:none; }
.event-detail-link:hover, .event-detail-link:focus-visible { color:var(--accent); text-decoration:underline; text-underline-offset:3px; }
/* "확인 필요" chip, appended by app.js to an unacknowledged critical row. */
.chip { font-size:.72rem; font-weight:600; color:var(--crit); background:#fbe2e2; padding:.12rem .5rem; border-radius:999px; }

.ack-btn { margin-left:auto; flex:none; }
.ack-btn:disabled { cursor:default; color:var(--ink-3); background:none; border:none; box-shadow:none; font-family:var(--mono); font-size:.8rem; }

/* ---- Section labels --------------------------------------------- */
.section-label { font-size:.79rem; font-weight:600; color:var(--ink-3); letter-spacing:.04em; margin:0 0 .7rem; }

/* ---- List toolbar: filters + "더 보기" --------------------------- */
.list-head { display:flex; align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap; margin-bottom:.7rem; }
.list-head .section-label { margin:0; }
.list-filters { display:flex; align-items:center; gap:.5rem; flex-wrap:wrap; }
.list-filters select { font-size:.82rem; padding:.35rem .5rem; }
.filter-check { display:inline-flex; align-items:center; gap:.35rem; font-size:.84rem; color:var(--ink-2); cursor:pointer; user-select:none; }
.filter-check input { accent-color:var(--accent); }
.list-more { display:flex; justify-content:center; margin-top:.5rem; }
.list-more button[hidden] { display:none; }

/* ---- Login ------------------------------------------------------- */
.login-form {
  display:flex; flex-direction:column; gap:.65rem; max-width:340px; margin:3.5rem auto 0;
  background:var(--card); border:1px solid var(--line); border-radius:16px; padding:1.8rem;
  box-shadow:var(--shadow);
}
.login-form h1 { margin:.1rem 0 .5rem; }
.form-error { color:var(--crit); font-size:.85rem; }

/* ---- Zone editor ------------------------------------------------- */
.zone-controls { display:flex; gap:.6rem; flex-wrap:wrap; align-items:end; margin-bottom:.9rem; }
.zone-controls label { display:flex; flex-direction:column; gap:.3rem; font-size:.8rem; }
#zone-canvas {
  border:1px solid var(--line); border-radius:12px;
  background:#0f1216 center / contain no-repeat;   /* dark canvas: a camera frame reads best on dark */
  cursor:crosshair; max-width:100%;
  box-shadow:var(--shadow);
}
#zone-list { list-style:none; padding:0; margin:1rem 0; display:flex; flex-direction:column; gap:.4rem; }
#zone-list li {
  display:flex; align-items:center; justify-content:space-between; gap:.75rem;
  max-width:360px; padding:.5rem .75rem;
  background:var(--card); border:1px solid var(--line); border-radius:10px;
  font-size:.85rem; color:var(--ink-2);
}
#zone-status { font-family:var(--mono); font-size:.82rem; color:var(--ink-3); }

/* ---- Incident detail -------------------------------------------- */
.detail-row { margin:.35rem 0; }
.detail-row .detail-label { color:var(--ink-3); font-weight:600; font-size:.75rem; text-transform:uppercase; letter-spacing:.05em; }
#event-detail-snapshots { display:flex; flex-wrap:wrap; gap:.85rem; margin-top:1.2rem; }
.detail-snapshot {
  max-width:100%; height:auto;
  border:1px solid var(--line); border-radius:12px; background:#fff; padding:4px;
  box-shadow:var(--shadow);
}

/* ---- Responsive -------------------------------------------------- */
@media (max-width:720px) {
  .status-strip { grid-template-columns:repeat(2,1fr); }
  .app-nav { margin-left:0; }
  .app-main { padding:1.5rem 1.1rem 3rem; }
}
@media (max-width:420px) {
  .status-strip { grid-template-columns:1fr 1fr; }
}