/* ==================================================================
   AI SAFETY CCTV — operations console.
   Light, dense, professional. A safety board is calm most of the time and
   urgent rarely: near-monochrome chrome, indigo reserved for interaction,
   colour spent only on the unacknowledged-critical alarm. Density carries the
   "professional product" weight — a two-column console (device/camera rail +
   detection stream) with a compact KPI strip and snapshot-forward event rows.
   Accessibility (NF9): state is never colour alone — a dot/led always pairs
   with a text label. Air-gapped (폐쇄망): system fonts, zero external assets.
   ================================================================== */
:root {
  color-scheme: light;

  /* Surfaces — content is light; chrome (top bar + rail) is a second neutral
     layer, a hair cooler and elevated with hairline borders. */
  --bg:      #eef1f5;   /* app canvas (cool light) */
  --panel:   #ffffff;   /* top bar + rail surface */
  --panel-2: #f7f9fc;   /* rail inset / hover fill */
  --card:    #ffffff;   /* content rows/cards */
  --line:    #e3e7ee;   /* hairline border */
  --line-2:  #edf0f5;   /* faint divider */

  /* Ink ramp — contrast-checked on white. ink-2 ≈ 8:1, ink-3 ≈ 4.6:1. */
  --ink:   #131824;
  --ink-2: #48505e;
  --ink-3: #6b7382;

  /* Brand + interaction (indigo — only where you act: nav, focus, selection, primary). */
  --accent:      #4f46e5;
  --accent-ink:  #ffffff;
  --accent-wash: #eceafe;
  --accent-line: #d6d2fb;

  /* Live monitoring (calm green, never an alarm). */
  --ok:      #15a34a;
  --ok-wash: #e7f6ec;

  /* Severity — reserved, semantic; identity always carries a text label too. */
  --crit:#dc2626; --crit-ink:#a51d1d; --crit-bg:#fdf2f2; --crit-line:#f2cccc;
  --high:#e2560c; --high-bg:#fdf4ee; --high-line:#f5d9c4;
  --warn:#b7820a; --warn-bg:#fbf6e6;
  --info:#5b6473;

  --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-sm:0 1px 2px rgba(19,24,36,.05);
  --shadow:   0 1px 2px rgba(19,24,36,.04), 0 10px 26px -18px rgba(19,24,36,.42);
  --radius:12px;

  /* z-scale (semantic, not arbitrary) */
  --z-sticky:100; --z-dropdown:200; --z-toast:400;
}
* { box-sizing:border-box; }
html { -webkit-text-size-adjust:100%; }
body {
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.45;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* ---- Top bar (chrome, second neutral layer) ---------------------- */
.app-header {
  position:sticky; top:0; z-index:var(--z-sticky);
  display:flex; align-items:center; gap:1.1rem;
  padding:.6rem 1.25rem;
  background:var(--panel);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-sm);
}
.app-brand { display:flex; align-items:center; gap:.6rem; text-decoration:none; color:inherit; }
.brand-mark {
  display:grid; place-items:center; width:34px; height:34px; flex:none;
  border-radius:9px; color:var(--accent);
  background:linear-gradient(180deg,#f3f2ff,#e9e7fe);
  border:1px solid var(--accent-line);
}
.brand-mark svg { width:20px; height:20px; display:block; }
.brand-text { display:flex; flex-direction:column; line-height:1.12; }
.brand-name { font-weight:750; font-size:.92rem; letter-spacing:.02em; color:var(--ink); }
.brand-tag  { font-size:.68rem; color:var(--ink-3); letter-spacing:.01em; }
/* legacy hook from the old header — kept harmless */
.live-dot { display:none; }

.app-nav { display:flex; gap:.15rem; margin-left:.6rem; margin-right:auto; }
.app-nav a {
  position:relative; color:var(--ink-2); text-decoration:none;
  font-size:.86rem; font-weight:550; padding:.42rem .7rem; border-radius:8px;
  transition:background .15s, color .15s;
}
.app-nav a:hover, .app-nav a:focus-visible { background:var(--panel-2); color:var(--ink); }
.app-nav a.is-active { color:var(--accent); background:var(--accent-wash); }

.app-session { display:flex; align-items:center; gap:.7rem; font-size:.84rem; color:var(--ink-2); }
.app-session .who { color:var(--ink); font-weight:550; display:inline-flex; align-items:center; gap:.4rem; }
.app-session .who::before {
  content:""; width:22px; height:22px; border-radius:50%; flex:none;
  background:radial-gradient(circle at 50% 38%, #fff 0 34%, transparent 35%), var(--accent-wash);
  border:1px solid var(--accent-line);
}
.app-session a { color:var(--accent); text-decoration:none; font-weight:550; }
.app-session a:hover { text-decoration:underline; text-underline-offset:3px; }

/* ---- Controls: buttons, fields ----------------------------------- */
button, .btn {
  font:inherit; font-size:.82rem; font-weight:550; cursor:pointer;
  padding:.4rem .78rem; color:var(--ink); background:var(--card);
  border:1px solid var(--line); border-radius:9px;
  transition:transform .1s, background .15s, border-color .15s, box-shadow .15s;
}
button:hover, .btn:hover { background:var(--panel-2); border-color:#d3d9e2; }
button:active, .btn:active { transform:translateY(.5px) scale(.99); }
button:disabled { cursor:default; }
:focus-visible { outline:2px solid var(--accent); outline-offset:2px; border-radius:6px; }

input, select {
  font:inherit; font-size:.86rem; color:var(--ink);
  padding:.44rem .6rem; background:var(--card);
  border:1px solid var(--line); border-radius:9px;
  transition:border-color .15s, box-shadow .15s;
}
input::placeholder { color:var(--ink-3); }
input:focus, select:focus {
  outline:none; border-color:var(--accent);
  box-shadow:0 0 0 3px var(--accent-wash);
}
label { color:var(--ink-2); font-size:.84rem; }

/* ---- Page shell -------------------------------------------------- */
.app-main { max-width:1380px; margin:0 auto; padding:1.5rem 1.25rem 3rem; }

/* ---- Console: device/camera rail + detection stream -------------- */
.console { display:grid; grid-template-columns:264px minmax(0,1fr); gap:1.25rem; align-items:start; }

.rail {
  position:sticky; top:calc(46px + 1.5rem);
  display:flex; flex-direction:column; gap:1.1rem;
  background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:1rem .9rem; box-shadow:var(--shadow-sm);
}
.rail-block { display:flex; flex-direction:column; gap:.6rem; }
.rail-block + .rail-block { padding-top:1rem; border-top:1px solid var(--line-2); }
.rail-title {
  margin:0; font-size:.7rem; font-weight:700; letter-spacing:.07em; text-transform:uppercase;
  color:var(--ink-3);
}
.rail-filters { display:flex; flex-direction:column; gap:.6rem; }
.rail-filters .field { display:flex; flex-direction:column; gap:.3rem; font-size:.74rem; font-weight:600; color:var(--ink-3); letter-spacing:.02em; text-transform:uppercase; }
.rail-filters select { text-transform:none; font-size:.85rem; font-weight:400; letter-spacing:0; color:var(--ink); }
.filter-check { display:inline-flex; align-items:center; gap:.45rem; font-size:.85rem; color:var(--ink-2); cursor:pointer; user-select:none; }
.filter-check input { width:15px; height:15px; accent-color:var(--accent); }

/* ---- Stream (main) ----------------------------------------------- */
.stream { display:flex; flex-direction:column; min-width:0; }
.stream-head { display:flex; align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap; margin-bottom:.9rem; }
.stream-title { display:flex; align-items:baseline; gap:.7rem; }
h1 { font-size:1.35rem; font-weight:760; letter-spacing:-.02em; margin:0; }
.page-head { display:flex; align-items:baseline; gap:.8rem; margin:0 0 .25rem; flex-wrap:wrap; }
.page-sub { color:var(--ink-3); font-size:.86rem; margin:.15rem 0 1.4rem; }
.section-label { font-size:.72rem; font-weight:700; color:var(--ink-3); letter-spacing:.06em; text-transform:uppercase; margin:0 0 .7rem; }

/* Live watch pill — green when polling, muted when stale; dot breathes while live. */
.watch { font-size:.8rem; font-weight:650; color:var(--ok); display:inline-flex; align-items:center; gap:.4rem; }
.watch::before { content:""; width:7px; height:7px; border-radius:50%; background:currentColor; flex:none; box-shadow:0 0 0 0 currentColor; animation:watch-pulse 2.4s ease-out infinite; }
.watch.is-stale { color:var(--ink-3); }
.watch.is-stale::before { animation:none; }
@keyframes watch-pulse { 0%{ box-shadow:0 0 0 0 rgba(21,163,74,.4);} 70%,100%{ box-shadow:0 0 0 6px rgba(21,163,74,0);} }

/* ---- KPI strip: compact unacknowledged counts -------------------- */
/* Computed client-side from the /api/events window (no extra endpoint). A tight
   inline strip of pills, not four hero cards — dense, glanceable. Zero dims, never hides. */
#events-status.kpi-strip { display:flex; gap:.5rem; flex-wrap:wrap; }
.stat-tile {
  display:inline-flex; align-items:center; gap:.5rem;
  padding:.4rem .7rem; background:var(--card);
  border:1px solid var(--line); border-radius:999px; box-shadow:var(--shadow-sm);
}
.stat-tile .stat-label { display:inline-flex; align-items:center; gap:.4rem; font-size:.76rem; font-weight:600; 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; }
.stat-tile .stat-count { font-size:1rem; font-weight:750; letter-spacing:-.02em; line-height:1; color:var(--ink); }
.stat-tile.is-zero { opacity:.55; }
.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);}
.tile-critical:not(.is-zero) { background:var(--crit-bg); border-color:var(--crit-line); }
.tile-critical:not(.is-zero) .stat-count, .tile-critical:not(.is-zero) .stat-label { color:var(--crit-ink); }

/* ---- Device / camera tree (rail) --------------------------------- */
/* Heartbeat telemetry the edge reports (online/offline, fps, temp, throttle, drift).
   A dead camera is a safety blind spot → an offline row takes the alarm red, with the
   "오프라인/응답 없음" text carrying state alongside the dot (NF9). */
.device-strip { display:flex; flex-direction:column; gap:.4rem; }
.device-strip.is-empty { color:var(--ink-3); font-size:.82rem; padding:.3rem 0; }
.device-card {
  background:var(--panel-2); border:1px solid var(--line); border-radius:10px;
  padding:.55rem .65rem; transition:border-color .15s, background .15s;
}
.device-card .device-name { display:flex; align-items:center; gap:.45rem; font-weight:600; font-size:.85rem; color:var(--ink); }
.device-card .device-name .dot { width:8px; height:8px; border-radius:50%; background:var(--ok); flex:none; box-shadow:0 0 0 3px var(--ok-wash); }
.device-card .device-meta { margin-top:.28rem; padding-left:.02rem; font-family:var(--mono); font-size:.72rem; color:var(--ink-3); }
.device-card .device-warn { margin-top:.32rem; font-size:.7rem; font-weight:650; color:var(--warn); }
.device-card.is-offline { background:var(--crit-bg); border-color:var(--crit-line); }
.device-card.is-offline .device-name { color:var(--crit-ink); }
.device-card.is-offline .device-name .dot { background:var(--crit); box-shadow:0 0 0 3px var(--crit-bg); }
.device-strip.is-stale { opacity:.6; }
.device-stale-note { font-size:.7rem; color:var(--ink-3); padding-bottom:.2rem; }

/* ---- Detection stream: event rows -------------------------------- */
.event-list { display:flex; flex-direction:column; gap:.5rem; }
.event-list[aria-busy="true"] .stream-empty { color:var(--ink-3); }
.stream-empty { padding:2.5rem 1rem; text-align:center; color:var(--ink-3); font-size:.9rem; }

.event-row {
  display:flex; align-items:center; gap:.9rem;
  background:var(--card); border:1px solid var(--line); border-radius:11px;
  padding:.6rem .8rem; box-shadow:var(--shadow-sm);
  transition:border-color .15s, box-shadow .15s, transform .1s;
}
.event-row:hover { border-color:#d3d9e2; box-shadow:var(--shadow); }
/* The one row that takes colour: an unacknowledged critical — full tint + border + a soft
   attention glow (state, not decoration). Never a bare colour: badge + "확인 필요" chip too. */
.event-row.is-unacknowledged.sev-row-critical {
  background:var(--crit-bg); border-color:var(--crit-line);
  animation:crit-attention 2.6s ease-out infinite;
}
.event-row.is-unacknowledged.sev-row-high { background:var(--high-bg); border-color:var(--high-line); }
@keyframes crit-attention { 0%{ box-shadow:0 0 0 0 rgba(220,38,38,.18);} 70%,100%{ box-shadow:0 0 0 5px rgba(220,38,38,0);} }

/* Evidence slot — a camera still on the left of every row (aligned, CCTV-grid feel). */
.event-thumb-slot { position:relative; width:74px; height:52px; flex:none; border-radius:8px; border:1px solid var(--line); background:#0e1116; overflow:hidden; }
.event-thumb { width:100%; height:100%; object-fit:cover; display:block; }
/* No snapshot (none captured, or purged by PIPA retention): an empty frame, not a black feed. */
.event-thumb-slot.is-empty { border-style:dashed; border-color:#cdd3dc; background:var(--panel-2); }
.event-thumb-slot.is-empty::after { content:"무영상"; position:absolute; inset:0; display:grid; place-items:center; font-size:.62rem; color:var(--ink-3); }

.severity-badge { display:inline-flex; align-items:center; gap:.42rem; flex:none; min-width:58px; font-size:.8rem; font-weight:650; white-space:nowrap; }
.severity-badge .icon { width:9px; height:9px; border-radius:50%; background:currentColor; font-size:0; line-height:0; flex:none; }
.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:.95rem; letter-spacing:-.01em; display:flex; align-items:center; gap:.5rem; }
.event-time { margin-top:.15rem; font-family:var(--mono); font-size:.75rem; 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; }
.chip { font-size:.68rem; font-weight:700; color:#fff; background:var(--crit); padding:.14rem .5rem; border-radius:999px; letter-spacing:.01em; }

.ack-btn { margin-left:auto; flex:none; }
.ack-btn:disabled { color:var(--ink-3); background:none; border-color:transparent; box-shadow:none; font-family:var(--mono); font-size:.76rem; }

/* "new events arrived while paging" reload affordance — honest about a possible gap. */
.page-gap-hint { display:flex; align-items:center; gap:.6rem; margin:0 0 .7rem; padding:.5rem .75rem;
  font-size:.8rem; color:var(--ink-2); background:var(--accent-wash); border:1px solid var(--accent-line); border-radius:9px; }
.page-gap-hint[hidden] { display:none; }
.page-gap-hint button { margin-left:auto; }

.list-more { display:flex; justify-content:center; margin-top:.8rem; }
.list-more button[hidden] { display:none; }

/* legacy list toolbar hooks (filters moved into the rail) */
.list-head { display:flex; align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap; margin-bottom:.7rem; }
.list-filters { display:flex; align-items:center; gap:.5rem; flex-wrap:wrap; }

/* ---- Login ------------------------------------------------------- */
.login-form {
  display:flex; flex-direction:column; gap:.7rem; max-width:360px; margin:4rem auto 0;
  background:var(--card); border:1px solid var(--line); border-radius:16px; padding:2rem 1.9rem;
  box-shadow:var(--shadow);
}
.login-form h1 { margin:.1rem 0 .5rem; font-size:1.3rem; }
.login-form label { display:flex; flex-direction:column; gap:.35rem; font-size:.8rem; font-weight:600; color:var(--ink-2); }
.login-form button { margin-top:.4rem; padding:.6rem; font-size:.9rem; background:var(--accent); color:var(--accent-ink); border-color:var(--accent); }
.login-form button:hover { background:#4239d6; border-color:#4239d6; }
.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:#0e1116 center / contain no-repeat; 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:380px; 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:700; font-size:.72rem; 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: rail collapses above the stream ----------------- */
@media (max-width:860px) {
  .console { grid-template-columns:1fr; }
  .rail { position:static; }
  .rail-block { flex-direction:column; }
  .rail-filters { flex-direction:row; flex-wrap:wrap; align-items:end; }
  .device-strip { flex-direction:row; flex-wrap:wrap; }
  .device-card { flex:1 1 12rem; }
}
@media (max-width:560px) {
  .app-main { padding:1rem .9rem 2.5rem; }
  .brand-tag { display:none; }
  .event-thumb { width:60px; height:42px; }
}

/* ---- Reduced motion ---------------------------------------------- */
@media (prefers-reduced-motion:reduce) {
  *, *::before, *::after { animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}