/* Header */
.header {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo {
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, #6366f1, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}
.header-sep { width: 1px; height: 28px; background: var(--glass-border); }
.domain-select {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}
.domain-select:hover { border-color: var(--accent-primary); }
.header-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.theme-toggle:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
.powered-by { font-size: 11px; color: var(--text-muted); }

/* Date range */
.date-range-wrap { position: relative; }
.date-range {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
}
.date-range:hover { border-color: var(--accent-primary); }
.date-picker-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 300px;
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
  z-index: 1000;
  padding: 16px;
}
[data-theme="light"] .date-picker-dropdown { background: rgba(240, 244, 255, 0.95); }
.date-picker-dropdown.open { display: block; }
.date-picker-presets { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.date-picker-presets button {
  padding: 5px 12px;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
}
.date-picker-presets button:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
.date-picker-presets button.active { background: var(--accent-primary); color: #fff; border-color: var(--accent-primary); }
.date-picker-custom { display: flex; align-items: center; gap: 8px; }
.date-picker-custom input[type="date"] {
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 12px;
  font-family: inherit;
}
.date-picker-custom .dp-apply {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}

/* Nav tabs */
.nav-tabs {
  display: flex;
  gap: 4px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 12px;
  padding: 4px;
  border: 1px solid var(--glass-border);
  margin: 16px 24px 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tab {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  white-space: nowrap;
  user-select: none;
}
.nav-tab:hover { color: var(--text-primary); background: rgba(255,255,255,0.04); }
.nav-tab.active {
  background: var(--accent-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* Main content */
.main { max-width: 1400px; margin: 0 auto; padding: 24px; }
.tab-content { display: none; animation: fadeIn .3s ease; }
.tab-content.active { display: block; }

/* Dashboard grid for drag-and-drop widgets */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: clamp(12px, 2vw, 24px);
}

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-1 { grid-template-columns: 1fr; }

/* Widget span variants */
.widget--wide { grid-column: span 2; }

/* Responsive — tablet */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

/* Responsive — mobile landscape / small tablet */
@media (max-width: 768px) {
  .header { flex-wrap: wrap; padding: 8px 12px; gap: 8px; }
  .nav-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .widget--wide { grid-column: span 1; }
  .kpi-value { font-size: 24px; }
  .card { padding: 16px; }
  .funnel-meta { display: none; }
  .date-range-wrap { order: -1; width: 100%; }
  .user-menu-wrap { order: 10; }
}

/* Responsive — phone */
@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .main { padding: 16px; }
  .header { padding: 0 16px; }
  .nav-tabs { margin: 12px 16px 0; }
  .dashboard-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .header { padding: 8px; }
  .nav-tabs { gap: 2px; }
  .nav-tab { padding: 6px 10px; font-size: 12px; }
}

@media (max-width: 720px) { .widget--wide { grid-column: span 1; } }