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

:root {
  --bg-base:    #0d0f14;
  --bg-surface: #13161d;
  --bg-card:    #191c25;
  --bg-card-h:  #1e2230;
  --border:     #252836;
  --border-act: #353a52;
  --accent:     #4f8ef7;
  --accent-dim: rgba(79,142,247,0.12);
  --green:      #34d399;
  --green-dim:  rgba(52,211,153,0.12);
  --amber:      #fbbf24;
  --amber-dim:  rgba(251,191,36,0.12);
  --red:        #f87171;
  --red-dim:    rgba(248,113,113,0.12);
  --purple:     #a78bfa;
  --purple-dim: rgba(167,139,250,0.12);
  --text-1:     #e8eaf0;
  --text-2:     #8b90a8;
  --text-3:     #4e5268;
  --font:       -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --mono:       'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --r:          10px;
  --r-lg:       16px;
  --sidebar-w:  220px;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-base);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
}

body { display: flex; }

/* ── SVG ICONS — hard-constrain so they never blow up ── */
svg { display: block; flex-shrink: 0; }
.nav-icon { width: 16px !important; height: 16px !important; opacity: 0.8; flex-shrink: 0; }
.nav-item.active .nav-icon { opacity: 1; }
.kpi-icon { width: 14px !important; height: 14px !important; color: var(--accent-color, var(--accent)); }

/* ── SIDEBAR ── */
.sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.sidebar-logo {
  padding: 20px 20px 16px;
  height: 120px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}

.sidebar-logo-disc {
  padding: 20px 20px 16px;
  height: 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}

.logo-mark {
  width: 32px; height: 32px; flex-shrink: 0;
  background: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.logo-mark svg { width: 18px !important; height: 18px !important; }
.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.logo-text { font-size: 15px; font-weight: 600; letter-spacing: -0.3px; color: var(--text-1); }
.logo-sub  { font-size: 10px; color: var(--text-3); font-family: var(--mono); }

.sidebar-section {
  padding: 8px 12px 4px; margin-top: 8px;
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-3);
}

.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; margin: 1px 8px;
  border-radius: 8px; cursor: pointer;
  color: var(--text-2); font-size: 13.5px; font-weight: 400;
  transition: all 0.15s; position: relative; user-select: none;
}
.nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text-1); }
.nav-item.active { background: var(--accent-dim); color: var(--accent); font-weight: 500; }
.nav-item.active::before {
  content: ''; position: absolute; left: -8px; top: 50%; transform: translateY(-50%);
  width: 3px; height: 18px; background: var(--accent); border-radius: 0 2px 2px 0;
}

.nav-badge {
  margin-left: auto;
  background: var(--accent-dim); color: var(--accent);
  font-size: 10px; font-family: var(--mono);
  padding: 1px 6px; border-radius: 100px; font-weight: 500;
}
.nav-badge-red { background: var(--red-dim) !important; color: var(--red) !important; }

.sidebar-footer { margin-top: auto; padding: 16px; border-top: 1px solid var(--border); }
.conn-status {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; background: var(--bg-card);
  border-radius: var(--r); border: 1px solid var(--border);
}
.status-dot {
  width: 7px; height: 7px; flex-shrink: 0;
  border-radius: 50%; background: var(--green);
  box-shadow: 0 0 6px var(--green);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; box-shadow:0 0 6px var(--green); }
  50%      { opacity:.7; box-shadow:0 0 12px var(--green); }
}
.status-label { font-size: 12px; font-weight: 500; }
.status-sub   { font-size: 10px; color: var(--text-3); font-family: var(--mono); }

/* ── MAIN ── */
.main { flex: 1; display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

/* ── TOPBAR ── */
.topbar {
  height: 56px; min-height: 56px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 24px; gap: 16px;
  background: var(--bg-surface); flex-shrink: 0;
}
.topbar-title { font-size: 15px; font-weight: 600; color: var(--text-1); }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.time-range { display: flex; gap: 4px; }
.time-btn {
  padding: 5px 10px; border-radius: 6px;
  font-size: 11.5px; font-weight: 500; cursor: pointer;
  color: var(--text-2); border: 1px solid transparent;
  background: none; font-family: var(--mono); transition: all 0.15s;
}
.time-btn:hover { color: var(--text-1); }
.time-btn.active { color: var(--accent); background: var(--accent-dim); border-color: rgba(79,142,247,0.2); }

.tab-group {
  display: flex; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 8px; padding: 3px; gap: 2px;
}
.tab-btn {
  padding: 5px 14px; border-radius: 6px;
  font-size: 12.5px; font-weight: 500; cursor: pointer;
  color: var(--text-2); border: none; background: none;
  font-family: var(--font); transition: all 0.15s;
}
.tab-btn:hover { color: var(--text-1); }
.tab-btn.active { background: var(--bg-surface); color: var(--text-1); box-shadow: 0 1px 3px rgba(0,0,0,.3); }

.icon-btn {
  width: 32px; height: 32px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-card);
  color: var(--text-2); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s; font-size: 14px;
}
.icon-btn:hover { color: var(--text-1); border-color: var(--border-act); }
.icon-btn svg { width: 14px !important; height: 14px !important; }

.auth-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
}

.auth-user {
  font-size: 12px;
  color: var(--text-2);
  padding: 0 8px;
  white-space: nowrap;
}

.logout-btn {
  width: auto;
  padding: 0 10px;
  font-size: 12px;
  font-family: var(--font);
}

/* ── CONTENT AREAS ── */
.content {
  flex: 1; overflow-y: auto; overflow-x: hidden;
  padding: 20px 24px; display: none;
}
.content.active { display: block; }
.content.fullscreen-view { padding: 0; display: none; flex-direction: column; }
.content.fullscreen-view.active { display: flex; }
.content::-webkit-scrollbar { width: 5px; }
.content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }

/* ── KPI ROW ── */
.kpi-row {
  display: grid; grid-template-columns: repeat(5,1fr);
  gap: 12px; margin-bottom: 20px;
}
.kpi-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 16px;
  position: relative; overflow: hidden; transition: border-color 0.2s;
  animation: fadeUp 0.3s ease both;
}
.kpi-card:nth-child(1){animation-delay:.05s}
.kpi-card:nth-child(2){animation-delay:.10s}
.kpi-card:nth-child(3){animation-delay:.15s}
.kpi-card:nth-child(4){animation-delay:.20s}
.kpi-card:nth-child(5){animation-delay:.25s}
.kpi-card:hover { border-color: var(--border-act); }
.kpi-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:2px;
  background: var(--accent-color, var(--accent)); opacity:.7;
}
@keyframes fadeUp {
  from { opacity:0; transform:translateY(8px); }
  to   { opacity:1; transform:translateY(0); }
}
.kpi-label {
  font-size: 11px; color: var(--text-3);
  text-transform: uppercase; letter-spacing:.06em; font-weight:600;
  margin-bottom: 8px; display: flex; align-items: center; gap: 6px;
}
.kpi-value {
  font-size: 26px; font-weight: 600; letter-spacing: -1px;
  color: var(--text-1); line-height:1; margin-bottom:6px;
  font-family: var(--mono);
}
.kpi-unit { font-size:13px; color:var(--text-3); font-weight:400; font-family:var(--font); margin-left:2px; }
.kpi-delta { font-size:11.5px; font-weight:500; display:flex; align-items:center; gap:3px; font-family:var(--mono); }
.kpi-delta.up      { color:var(--green); }
.kpi-delta.down    { color:var(--red); }
.kpi-delta.neutral { color:var(--text-3); }

/* ── GRIDS ── */
.grid-2   { display:grid; grid-template-columns:1fr 1fr;     gap:16px; margin-bottom:16px; }
.grid-3   { display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px; margin-bottom:16px; }
.grid-3-1 { display:grid; grid-template-columns:2fr 1fr;     gap:16px; margin-bottom:16px; }

/* ── CARD ── */
.card { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--r-lg); overflow:hidden; }
.card-header {
  padding:14px 18px 12px;
  display:flex; align-items:center; gap:10px;
  border-bottom:1px solid var(--border);
}
.card-title { font-size:13px; font-weight:600; flex:1; color:var(--text-1); }
.card-sub   { font-size:11px; color:var(--text-3); font-family:var(--mono); }
.card-badge { font-size:10px; padding:2px 8px; border-radius:100px; font-weight:600; font-family:var(--mono); white-space:nowrap; }
.badge-green  { background:var(--green-dim);  color:var(--green); }
.badge-amber  { background:var(--amber-dim);  color:var(--amber); }
.badge-red    { background:var(--red-dim);    color:var(--red); }
.badge-blue   { background:var(--accent-dim); color:var(--accent); }
.card-body { padding:18px; }

/* ── CHARTS ── */
.chart-wrap      { position:relative; height:180px; }
.chart-tall      { height:220px; }

/* ── SPARKLINES ── */
.spark-row {
  display:flex; align-items:center; gap:10px;
  padding:8px 0; border-bottom:1px solid rgba(37,40,54,.5);
}
.spark-row:last-child { border-bottom:none; }
.spark-label { font-size:12px; color:var(--text-2); width:80px; flex-shrink:0; }
.spark-canvas { flex:1; height:32px; display:block; }
.spark-val { font-family:var(--mono); font-size:13px; font-weight:500; width:64px; text-align:right; flex-shrink:0; }

/* ── HEATMAP ── */
.heatmap-row { display:flex; align-items:center; gap:2px; margin-bottom:3px; }
.heatmap-day { font-size:10px; color:var(--text-3); width:26px; font-family:var(--mono); flex-shrink:0; }
.heatmap-cells { display:grid; grid-template-columns:repeat(24,1fr); gap:2px; flex:1; }
.heatmap-cell { aspect-ratio:1; border-radius:2px; cursor:pointer; transition:opacity .15s; }
.heatmap-cell:hover { opacity:.7; }
.heatmap-axis { display:flex; justify-content:space-between; margin-top:4px; font-size:10px; color:var(--text-3); font-family:var(--mono); padding-left:30px; }

/* ── ALERTS ── */
.alert-item {
  display:flex; align-items:flex-start; gap:12px;
  padding:12px 0; border-bottom:1px solid rgba(37,40,54,.5);
}
.alert-item:last-child { border-bottom:none; }
.alert-icon {
  width:32px; height:32px; min-width:32px; border-radius:8px;
  display:flex; align-items:center; justify-content:center; font-size:14px;
}
.alert-icon.warn { background:var(--amber-dim); }
.alert-icon.crit { background:var(--red-dim); }
.alert-icon.info { background:var(--accent-dim); }
.alert-title { font-size:12.5px; font-weight:500; margin-bottom:2px; color:var(--text-1); }
.alert-desc  { font-size:11px; color:var(--text-3); }
.alert-time  { font-size:10.5px; color:var(--text-3); font-family:var(--mono); margin-top:2px; }

/* ── DEVICE TABLE ── */
.device-table { width:100%; border-collapse:collapse; }
.device-table th {
  padding:8px 14px; text-align:left;
  font-size:10.5px; font-weight:600; color:var(--text-3);
  text-transform:uppercase; letter-spacing:.06em;
  border-bottom:1px solid var(--border);
}
.device-table td { padding:10px 14px; font-size:12.5px; border-bottom:1px solid rgba(37,40,54,.5); vertical-align:middle; }
.device-table tr:last-child td { border-bottom:none; }
.device-table tr:hover td { background:rgba(255,255,255,.02); }
.d-name { font-weight:500; color:var(--text-1); }
.d-loc  { font-size:11px; color:var(--text-3); }
.d-val  { font-family:var(--mono); font-size:12px; color:var(--text-2); }
.dot-on  { display:inline-block; width:6px; height:6px; border-radius:50%; background:var(--green); box-shadow:0 0 5px var(--green); }
.dot-off { display:inline-block; width:6px; height:6px; border-radius:50%; background:var(--text-3); }

/* ── 3D MODEL TAB ── */
.model-toolbar {
  padding:10px 20px; border-bottom:1px solid var(--border);
  display:flex; align-items:center; gap:12px;
  background:var(--bg-surface); flex-shrink:0;
}
.model-toolbar svg { width:14px !important; height:14px !important; }
.model-title { font-size:13px; font-weight:600; color:var(--text-1); }
.model-file  { font-size:11px; color:var(--text-3); font-family:var(--mono); }
.model-viewport { flex:1; position:relative; background:#08090d; overflow:hidden; }
.model-empty {
  position:absolute; inset:0;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:12px; color:var(--text-3);
}
.model-empty svg { width:32px !important; height:32px !important; }
.model-empty .drop-title { font-size:13px; color:var(--text-2); }

/* ── TOGGLE ── */
.toggle-label { display:flex; align-items:center; gap:8px; font-size:12px; color:var(--text-2); cursor:pointer; }
.toggle-label input { display:none; }
.toggle-track {
  position:relative; width:32px; height:18px;
  background:var(--border); border-radius:9px; transition:background .2s; display:inline-block;
}
.toggle-label input:checked + .toggle-track { background:var(--accent); }
.toggle-knob {
  position:absolute; top:2px; left:2px;
  width:14px; height:14px; border-radius:50%; background:#fff; transition:transform .2s;
}
.toggle-label input:checked + .toggle-track .toggle-knob { transform:translateX(14px); }

/* ── LOAD IFC BUTTON ── */
.btn-load-ifc {
  padding:6px 16px; background:var(--accent); color:#fff;
  border-radius:8px; font-size:12.5px; font-weight:500;
  cursor:pointer; transition:opacity .15s; font-family:var(--font);
  white-space:nowrap;
}
.btn-load-ifc:hover { opacity:.85; }
.btn-load-ifc input[type=file] { display:none; }

/* ── SPIN KEYFRAME (used inline by refresh btn) ── */
@keyframes spin { to { transform:rotate(360deg); } }

* { scrollbar-width:thin; scrollbar-color:var(--border) transparent; }