/* ═══════════════════════════════════════════
   Control Room — dark theme for Fire Panel PWA
   ═══════════════════════════════════════════ */

/* ── Design tokens ── */
:root {
  /* Severity colours */
  --fire:  #ff3b30;
  --fault: #ffab00;
  --supv:  #2f9bff;
  --norm:  #2bd96b;
  --info:  #8a93a0;

  /* Surfaces */
  --bg:     #05070a;
  --card:   #0c1117;
  --border: #18202a;
  --header: #0a0e14;

  /* Text */
  --text:  #e9eef4;
  --muted: #6b7682;

  /* Typography */
  --font-ui:   system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, Menlo, "Cascadia Code", "Courier New", monospace;

  /* Layout */
  --header-h: 52px;
  --nav-h:    56px;
}

/* ── Reset / base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  line-height: 1.4;
  min-height: 100dvh;
  padding-top: var(--header-h);
  padding-bottom: var(--nav-h);
}

button {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font: inherit;
}

input {
  font: inherit;
}

/* ── Severity colour mapping ──
   Any element with [data-sev] or a .severity-<x> class gets --c set.
   Tabs and cards then reference var(--c) for accent colour.         */
[data-sev="fire"],   .severity-fire        { --c: var(--fire); }
[data-sev="fault"],  .severity-fault       { --c: var(--fault); }
[data-sev="supervisory"], .severity-supervisory { --c: var(--supv); }
[data-sev="all"]                           { --c: var(--info); }
[data-sev="normal"], .severity-normal      { --c: var(--norm); }
[data-sev="reset"],  .severity-reset       { --c: var(--info); }
[data-sev="info"],   .severity-info        { --c: var(--info); }

/* Zero-specificity fallback so any [data-sev] mapping above always wins. */
:where(.tab, .event-card) { --c: var(--info); }

/* ── Header ── */
.app-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  height: var(--header-h);
  background: var(--header);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 10px;
  z-index: 100;
}

#app-title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
  flex: 1;
}

/* ── Liveness chip ── */
#liveness-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  white-space: nowrap;
  transition: color 0.3s, border-color 0.3s;
}

.chip-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

/* Online — green */
#liveness-chip.live-online {
  color: var(--norm);
  border-color: color-mix(in srgb, var(--norm) 30%, transparent);
}

/* Panel offline — amber */
#liveness-chip.live-panel-offline {
  color: var(--fault);
  border-color: color-mix(in srgb, var(--fault) 30%, transparent);
}

/* Reconnecting — muted grey */
#liveness-chip.live-reconnecting {
  color: var(--muted);
  border-color: var(--border);
}

/* ── Alerts button ── */
.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 1.1rem;
  color: var(--muted);
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  background: var(--border);
  color: var(--text);
}

/* ── Liveness banners ── */
.banner {
  display: none;
  /* sticky (not fixed) so a visible banner occupies layout space and pushes the
     tabs down instead of overlapping them, while still pinning below the header. */
  position: sticky;
  top: var(--header-h);
  inset-inline: 0;
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
  padding: 6px 12px;
  z-index: 90;
  letter-spacing: 0.02em;
}

.banner.panel-offline {
  background: color-mix(in srgb, var(--fault) 15%, var(--header));
  color: var(--fault);
  border-bottom: 1px solid color-mix(in srgb, var(--fault) 35%, transparent);
}

.banner.reconnecting {
  background: color-mix(in srgb, var(--muted) 12%, var(--header));
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

/* JS adds .visible to show a banner */
.banner.visible { display: block; }

/* ── Screen routing ── */
#view {
  min-height: calc(100dvh - var(--header-h) - var(--nav-h));
}

.screen        { display: none; }
.screen.active { display: block; }

/* ── Count tabs (#tabs) ── */
#tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-bottom: 1px solid var(--border);
  background: var(--header);
}

.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 4px 8px;
  min-height: 64px;
  gap: 2px;
  border-right: 1px solid var(--border);
  border-bottom: 2px solid transparent;
  color: var(--muted);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.tab:last-child { border-right: none; }

.tab-count {
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c);
}

.tab-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Active tab */
.tab.active {
  background: color-mix(in srgb, var(--c) 10%, var(--header));
  border-bottom-color: var(--c);
  color: var(--text);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--c) 20%, transparent);
}

.tab.active .tab-label { color: var(--c); }

/* Empty-state / placeholder copy (feed, history, detail not-found, no-backend). */
.empty {
  padding: 28px 16px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

/* ── Event feed + history feed ── */
#feed,
#history-feed {
  padding: 8px 0 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ── Event card ── */
.event-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--c);
  border-radius: 0 8px 8px 0;
  margin: 0 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: box-shadow 0.15s;
}

.event-card .title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.event-card .sev-tag {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 28%, transparent);
  border-radius: 4px;
  padding: 2px 5px;
  flex-shrink: 0;
}

.event-card .event-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.event-card .zone {
  font-size: 0.8rem;
  color: var(--muted);
}

.event-card .meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.01em;
}

/* ── New-event highlight (.new class) ── */
@keyframes new-glow-fade {
  0%   { box-shadow: 0 0 0 1px color-mix(in srgb, var(--c) 40%, transparent),
                     0 0 14px color-mix(in srgb, var(--c) 13%, transparent); }
  100% { box-shadow: none; }
}

.event-card.new {
  animation: new-glow-fade 1.2s ease-out forwards;
}

/* ── History screen toolbar ── */
.screen-toolbar {
  padding: 10px 10px 4px;
}

#history-search {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0 12px;
  height: 40px;
  outline: none;
  transition: border-color 0.15s;
}

#history-search::placeholder { color: var(--muted); }

#history-search:focus {
  border-color: color-mix(in srgb, var(--supv) 60%, transparent);
}

/* ── Bottom nav ── */
.nav {
  position: fixed;
  bottom: 0;
  inset-inline: 0;
  height: var(--nav-h);
  background: var(--header);
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  min-height: 40px;
  border-top: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.nav-item:hover,
.nav-item:focus-visible {
  color: var(--text);
}

.nav-item.active {
  color: var(--supv);
  border-top-color: var(--supv);
}

/* ── Focus visible ring (accessibility) ── */
:focus-visible {
  outline: 2px solid var(--supv);
  outline-offset: 2px;
}

/* ── Scrollbar (WebKit) ── */
::-webkit-scrollbar        { width: 4px; }
::-webkit-scrollbar-track  { background: transparent; }
::-webkit-scrollbar-thumb  { background: var(--border); border-radius: 2px; }

/* ══════════════════════════════════════
   Detail screen
   ══════════════════════════════════════ */

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 10px 10px 0;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--supv);
  background: color-mix(in srgb, var(--supv) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--supv) 25%, transparent);
  transition: background 0.15s;
}

.detail-back:hover,
.detail-back:focus-visible {
  background: color-mix(in srgb, var(--supv) 18%, transparent);
}

.detail-hero {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 14px 10px 10px;
  padding: 14px 14px;
  background: color-mix(in srgb, var(--c, var(--info)) 8%, var(--card));
  border: 1px solid color-mix(in srgb, var(--c, var(--info)) 28%, var(--border));
  border-left: 4px solid var(--c, var(--info));
  border-radius: 0 8px 8px 0;
}

.detail-hero-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.detail-fields {
  margin: 0 10px 12px;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.detail-fields dt,
.detail-fields dd {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
}

.detail-fields dt:last-of-type,
.detail-fields dd:last-of-type {
  border-bottom: none;
}

.detail-fields dt {
  font-weight: 600;
  color: var(--muted);
  background: var(--header);
  white-space: nowrap;
}

.detail-fields dd {
  font-family: var(--font-mono);
  color: var(--text);
  word-break: break-all;
}

pre.raw {
  margin: 0 10px 16px;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
}

/* ══════════════════════════════════════
   Alerts / Settings screen
   ══════════════════════════════════════ */

.alerts-section {
  margin: 12px 10px 0;
  padding: 2px 0 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  overflow: hidden;
}

.alerts-heading {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 10px 14px 6px;
}

.alerts-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--text);
  transition: background 0.12s;
}

.alerts-row:hover {
  background: color-mix(in srgb, var(--text) 4%, transparent);
}

.alerts-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--supv);
  flex-shrink: 0;
  cursor: pointer;
}

.alerts-note {
  margin: 6px 14px 4px;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.5;
}

.alerts-field {
  border-top: 1px solid var(--border);
  padding: 10px 14px;
}

.alerts-field-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.alerts-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 0 10px;
  height: 38px;
  font-size: 0.88rem;
  font-family: var(--font-mono);
  outline: none;
  transition: border-color 0.15s;
}

.alerts-input:focus {
  border-color: color-mix(in srgb, var(--supv) 60%, transparent);
}

.alerts-install-btn {
  display: block;
  margin: 10px 14px 4px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  background: color-mix(in srgb, var(--supv) 14%, transparent);
  color: var(--supv);
  border: 1px solid color-mix(in srgb, var(--supv) 30%, transparent);
  transition: background 0.15s;
}

.alerts-install-btn:hover:not(:disabled),
.alerts-install-btn:focus-visible:not(:disabled) {
  background: color-mix(in srgb, var(--supv) 22%, transparent);
}

.alerts-install-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}