:root {
  /* Kleuren - Monday.com stijl */
  --bg-primary: #f6f7fb;
  --bg-surface: #ffffff;
  --bg-sidebar: #292f4c;
  --bg-sidebar-hover: #3c4260;
  --bg-sidebar-active: #4b5178;

  --text-primary: #323338;
  --text-secondary: #676879;
  --text-light: #c5c7d0;
  --text-sidebar: #c5c7d0;
  --text-sidebar-active: #ffffff;

  --accent: #0066ff;
  --accent-hover: #0052cc;
  --accent-light: #e6f0ff;

  /* Status kleuren */
  --status-not-started: #c4c4c4;
  --status-working: #fdab3d;
  --status-done: #00c875;
  --status-stuck: #e2445c;

  /* Prioriteit kleuren */
  --priority-high: #e2445c;
  --priority-medium: #fdab3d;
  --priority-low: #579bfc;

  /* Overig */
  --danger: #e2445c;
  --success: #00c875;
  --warning: #fdab3d;
  --border: #e6e9ef;
  --border-light: #f0f1f5;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.06);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --sidebar-width: 260px;
  --topbar-height: 56px;

  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 20px;

  --transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode */
[data-theme="dark"] {
  --bg-primary: #1a1d23;
  --bg-surface: #23272e;
  --bg-sidebar: #16181d;
  --bg-sidebar-hover: #2a2e36;
  --bg-sidebar-active: #353a44;

  --text-primary: #e4e6ea;
  --text-secondary: #9a9daa;
  --text-light: #6b6e7a;
  --text-sidebar: #9a9daa;
  --text-sidebar-active: #ffffff;

  --accent-light: #0d2847;

  --border: #333740;
  --border-light: #2a2e36;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
}

[data-theme="dark"] .auth-screen {
  background: linear-gradient(135deg, #16181d 0%, #0d0f12 100%);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-color: var(--border);
}

[data-theme="dark"] .kanban-card {
  background: var(--bg-surface);
}

[data-theme="dark"] .toast {
  background: #353a44;
}

/* Dark mode: kanban card shadow fix */
[data-theme="dark"] .kanban-card {
  box-shadow: 0 1px 4px rgba(0,0,0,0.2), 0 0 0 1px rgba(255,255,255,0.04);
}

[data-theme="dark"] .kanban-card:hover {
  box-shadow: 0 8px 20px rgba(0,0,0,0.35), 0 2px 4px rgba(0,0,0,0.2);
}

/* Dark mode: kanban add card hover */
[data-theme="dark"] .kanban-add-card:hover {
  background: rgba(255,255,255,0.06);
}

/* Dark mode: btn-icon hover */
[data-theme="dark"] .btn-icon:hover {
  background: rgba(255,255,255,0.08);
}

/* Dark mode: focus ring donkerder */
[data-theme="dark"] input:focus,
[data-theme="dark"] select:focus,
[data-theme="dark"] textarea:focus {
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.25);
}

/* Dark mode: btn-primary hover schaduw */
[data-theme="dark"] .btn-primary:hover {
  box-shadow: 0 4px 12px rgba(0, 102, 255, 0.4);
}

/* Dark mode: kalender fixes */
[data-theme="dark"] .calendar-day:hover {
  background: var(--bg-primary);
}

[data-theme="dark"] .calendar-day.weekend {
  background: rgba(255,255,255,0.02);
}

[data-theme="dark"] .calendar-day.today {
  background: rgba(0, 102, 255, 0.08);
}

[data-theme="dark"] .calendar-task.overdue {
  background: rgba(226, 68, 92, 0.15);
}

[data-theme="dark"] .calendar-task.urgent {
  background: rgba(253, 171, 61, 0.15);
}

/* Dark mode: context-btn hover */
[data-theme="dark"] .context-btn:hover {
  background: rgba(255,255,255,0.08);
}

/* Dark mode: inline-edit hover */
[data-theme="dark"] .inline-edit:hover {
  background: rgba(255,255,255,0.05);
}

/* Dark mode: kanban drop zone */
[data-theme="dark"] .kanban-column-body.drag-over {
  background: rgba(0, 102, 255, 0.08);
}

/* Dark mode: notification bell hover */
[data-theme="dark"] .notification-bell:hover {
  background: rgba(255,255,255,0.08);
}

/* Dark mode: search overlay */
[data-theme="dark"] .search-overlay {
  background: rgba(0,0,0,0.6);
}

/* Dark mode: kanban placeholder */
[data-theme="dark"] .kanban-placeholder {
  background: rgba(0, 102, 255, 0.1);
  border-color: rgba(0, 102, 255, 0.3);
}

/* Dark mode: timeline fixes */
[data-theme="dark"] .timeline-day-cell.weekend {
  background: rgba(255,255,255,0.02);
}

[data-theme="dark"] .timeline-gridline.weekend {
  background: rgba(255,255,255,0.015);
}

[data-theme="dark"] .timeline-gridline.today {
  background: rgba(0,102,255,0.06);
}

[data-theme="dark"] .timeline-today-line {
  box-shadow: 0 0 12px rgba(0,102,255,0.4);
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}