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

:root {
  --hdr-h:     48px;
  --accent:    #00aaff;
  --bg:        #0d0d0f;
  --hdr-bg:    #111318;
  --hdr-border:#1e2130;
  --panel-bg:  #161b27;
  --panel-w:   300px;
  --text:      #e2e8f0;
  --muted:     #64748b;
  --radius:    6px;
  --gap:       4px;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  overflow: hidden;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
#header {
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--hdr-h);
  padding: 0 16px;
  background: var(--hdr-bg);
  border-bottom: 1px solid var(--hdr-border);
  position: relative;
  z-index: 20;
}

#header h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--text);
  flex: 1;
}

#header h1 span {
  color: var(--accent);
}

.hdr-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius);
  border: 1px solid var(--hdr-border);
  background: transparent;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.hdr-btn:hover { background: #1e2130; border-color: #2d3450; }

.hdr-btn.active {
  background: #0e1e38;
  border-color: var(--accent);
  color: var(--accent);
}

#user-label {
  color: var(--muted);
  font-size: 12px;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Main area ───────────────────────────────────────────────────────────── */
#main {
  display: flex;
  height: calc(100vh - var(--hdr-h));
  position: relative;
}

/* ── Dashboard grid ──────────────────────────────────────────────────────── */
#grid {
  flex: 1;
  display: grid;
  gap: var(--gap);
  padding: var(--gap);
  background: #080808;
  overflow: hidden;
  transition: grid-template-columns 0.2s, grid-template-rows 0.2s;
}

/* layout variants set by JS */
#grid.count-1 { grid-template-columns: 1fr; grid-template-rows: 1fr; }
#grid.count-2 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr; }
#grid.count-3 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }
#grid.count-4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }

/* 3-panel: last item spans both columns */
#grid.count-3 .panel:last-child { grid-column: 1 / -1; }

.panel {
  position: relative;
  background: #0d0d0f;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--hdr-border);
}

.panel iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.panel-label {
  position: absolute;
  top: 8px;
  left: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.35);
  pointer-events: none;
  z-index: 2;
}

/* ── Empty state ─────────────────────────────────────────────────────────── */
#empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  height: 100%;
  color: var(--muted);
  text-align: center;
}

#empty-state svg { opacity: .3; }

#empty-state p { font-size: 15px; line-height: 1.5; }

#empty-state button {
  padding: 10px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s;
}

#empty-state button:hover { background: rgba(0,170,255,.1); }

/* ── Picker panel ────────────────────────────────────────────────────────── */
#picker {
  width: var(--panel-w);
  background: var(--panel-bg);
  border-left: 1px solid var(--hdr-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateX(var(--panel-w));
  transition: transform 0.2s ease;
}

#picker.open { transform: translateX(0); }

#picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--hdr-border);
}

#picker-header h2 { font-size: 13px; font-weight: 600; }

#picker-close {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  font-size: 18px;
  transition: color 0.15s;
}

#picker-close:hover { color: var(--text); }

#picker-hint {
  font-size: 11px;
  color: var(--muted);
  padding: 10px 16px 6px;
}

#picker-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.picker-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  cursor: pointer;
  transition: background 0.12s;
  user-select: none;
}

.picker-item:hover { background: rgba(255,255,255,.04); }

.picker-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.picker-item label {
  flex: 1;
  font-size: 14px;
  cursor: pointer;
}

.picker-item.disabled { opacity: .4; pointer-events: none; }

#picker-footer {
  padding: 14px 16px;
  border-top: 1px solid var(--hdr-border);
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

/* ── Scrollbar ───────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #2a2e3d; border-radius: 3px; }