/**
 * Planwerk – Das moderne Arbeits- & Projektmanagement für Kreativteams
 * Design System & UI Stylesheet (WCAG 2.2 AA compliant, Mobile-First, Dark & Light Mode)
 */

:root {
  /* Colors - Light Theme Default */
  --bg-app: #f8fafc;
  --bg-sidebar: #0f172a;
  --bg-sidebar-hover: #1e293b;
  --bg-sidebar-active: #2563eb;
  --text-sidebar: #94a3b8;
  --text-sidebar-bright: #f8fafc;

  --surface-card: #ffffff;
  --surface-elevated: #ffffff;
  --surface-subtle: #f1f5f9;
  --surface-hover: #f8fafc;
  --surface-active: #e2e8f0;

  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #3b82f6;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --text-inverse: #ffffff;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-subtle: #eff6ff;
  --primary-text: #1d4ed8;

  --success: #10b981;
  --success-subtle: #ecfdf5;
  --success-text: #047857;

  --warning: #f59e0b;
  --warning-subtle: #fffbeb;
  --warning-text: #b45309;

  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-subtle: #fef2f2;
  --danger-text: #b91c1c;

  --info: #0ea5e9;
  --info-subtle: #f0f9ff;
  --info-text: #0369a1;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.84375rem;
  --text-base: 0.9375rem;
  --text-lg: 1.0625rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;

  /* Borders & Radius */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.07), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-modal: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.08);

  /* Layout */
  --sidebar-width: 250px;
  --sidebar-collapsed-width: 68px;
  --header-height: 60px;
  --column-width: 320px;

  /* Z-Index */
  --z-base: 1;
  --z-sticky: 10;
  --z-header: 30;
  --z-sidebar: 40;
  --z-dropdown: 50;
  --z-modal-backdrop: 90;
  --z-modal: 100;
  --z-toast: 110;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Tokens */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-app: #090d16;
    --surface-card: #131b2e;
    --surface-elevated: #1a233b;
    --surface-subtle: #19233c;
    --surface-hover: #1e2a47;
    --surface-active: #27365c;

    --border-subtle: #1e293b;
    --border-medium: #334155;
    --border-focus: #60a5fa;

    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-subtle: #1e293b;
    --primary-text: #93c5fd;

    --success: #10b981;
    --success-subtle: #064e3b;
    --success-text: #6ee7b7;

    --warning: #f59e0b;
    --warning-subtle: #78350f;
    --warning-text: #fde68a;

    --danger: #ef4444;
    --danger-subtle: #7f1d1d;
    --danger-text: #fca5a5;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-modal: 0 25px 30px -5px rgba(0, 0, 0, 0.7);
  }
}

:root[data-theme="dark"] {
  --bg-app: #090d16;
  --surface-card: #131b2e;
  --surface-elevated: #1a233b;
  --surface-subtle: #19233c;
  --surface-hover: #1e2a47;
  --surface-active: #27365c;

  --border-subtle: #1e293b;
  --border-medium: #334155;
  --border-focus: #60a5fa;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-subtle: #1e293b;
  --primary-text: #93c5fd;

  --success: #10b981;
  --success-subtle: #064e3b;
  --success-text: #6ee7b7;

  --warning: #f59e0b;
  --warning-subtle: #78350f;
  --warning-text: #fde68a;

  --danger: #ef4444;
  --danger-subtle: #7f1d1d;
  --danger-text: #fca5a5;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 25px 30px -5px rgba(0, 0, 0, 0.7);
}

/* Base Reset & Typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--text-main);
  background-color: var(--bg-app);
  height: 100%;
  display: flex;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Accessibility & Focus */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  text-decoration: underline;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

svg {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

/* App Shell Layout */
.app-container {
  display: flex;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
.app-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  color: var(--text-sidebar);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: width var(--transition-normal);
  z-index: var(--z-sidebar);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-header {
  height: var(--header-height);
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: #ffffff;
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
  text-decoration: none;
}
.sidebar-brand:hover {
  text-decoration: none;
}

.brand-badge {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: white;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3) 0;
}

.nav-section {
  margin-bottom: var(--space-4);
}

.nav-section-title {
  padding: var(--space-1) var(--space-4);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #475569;
  font-weight: 700;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  color: var(--text-sidebar);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
  position: relative;
}

.nav-item:hover {
  background-color: var(--bg-sidebar-hover);
  color: var(--text-sidebar-bright);
  text-decoration: none;
}

.nav-item.active {
  background-color: rgba(37, 99, 235, 0.15);
  color: #60a5fa;
  font-weight: 600;
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: #3b82f6;
  border-radius: 0 2px 2px 0;
}

.nav-badge {
  margin-left: auto;
  background-color: var(--primary);
  color: white;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 1px 7px;
  border-radius: var(--radius-full);
}

.sidebar-footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-profile-widget {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-sidebar-bright);
  text-decoration: none;
  font-size: var(--text-sm);
  overflow: hidden;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: #334155;
  color: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-xs);
  flex-shrink: 0;
}

/* Main Content Area */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-app);
}

/* Top Navigation Bar */
.app-header {
  height: var(--header-height);
  background-color: var(--surface-card);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  flex-shrink: 0;
  z-index: var(--z-header);
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Active Timer Header Bar Widget */
.timer-header-widget {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
}

.timer-header-widget.running {
  background-color: var(--danger-subtle);
  border-color: var(--danger);
  color: var(--danger-text);
}

.timer-header-widget.running .timer-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--danger);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Search Bar */
.search-container {
  position: relative;
  width: 280px;
}

.search-input {
  width: 100%;
  padding: var(--space-2) var(--space-3) var(--space-2) 36px;
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.search-input:focus {
  background-color: var(--surface-card);
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-results-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: var(--space-2);
  background-color: var(--surface-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-height: 400px;
  overflow-y: auto;
  z-index: var(--z-dropdown);
  display: none;
}

/* Page Body Container */
.page-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
}

/* Kanban Board View Specifics */
.board-page {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.board-header {
  padding: var(--space-4) var(--space-6);
  background-color: var(--surface-card);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-shrink: 0;
}

.board-title-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.project-badge-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  box-shadow: var(--shadow-xs);
}

.board-nav-tabs {
  display: flex;
  gap: var(--space-1);
  background-color: var(--surface-subtle);
  padding: 3px;
  border-radius: var(--radius-md);
}

.board-nav-tab {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.board-nav-tab:hover {
  color: var(--text-main);
  text-decoration: none;
}

.board-nav-tab.active {
  background-color: var(--surface-card);
  color: var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-xs);
}

/* Board Filter Bar */
.board-filter-bar {
  padding: var(--space-2) var(--space-6);
  background-color: var(--surface-card);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: var(--text-sm);
  flex-shrink: 0;
}

.filter-select {
  padding: var(--space-1) var(--space-2);
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--text-main);
}

/* Kanban Columns Canvas */
.board-canvas {
  flex: 1;
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  padding: var(--space-4) var(--space-6);
  gap: var(--space-4);
  background-color: var(--bg-app);
}

.board-column {
  width: var(--column-width);
  min-width: var(--column-width);
  max-width: var(--column-width);
  display: flex;
  flex-direction: column;
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-height: 100%;
}

.column-header {
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 3px solid #64748b;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background-color: var(--surface-card);
  border-bottom: 1px solid var(--border-subtle);
}

.column-title-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: var(--text-sm);
}

.column-badge {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

.column-badge.wip-exceeded {
  background-color: var(--danger-subtle);
  color: var(--danger-text);
  border-color: var(--danger);
}

.column-tasks-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 100px;
}

.column-tasks-container.drag-over {
  background-color: rgba(37, 99, 235, 0.05);
  outline: 2px dashed var(--primary);
  border-radius: var(--radius-md);
}

/* Task Cards */
.task-card {
  background-color: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-xs);
  cursor: grab;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  user-select: none;
  position: relative;
}

.task-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.task-card.dragging {
  opacity: 0.4;
  cursor: grabbing;
}

.task-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
  gap: var(--space-2);
}

.task-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  font-weight: 600;
}

.task-priority-badge {
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  text-transform: capitalize;
}
.priority-niedrig { background: #f1f5f9; color: #475569; }
.priority-normal { background: #e0f2fe; color: #0369a1; }
.priority-hoch { background: #fef3c7; color: #b45309; }
.priority-dringend { background: #fee2e2; color: #b91c1c; }

.task-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: var(--space-2);
}

.task-card.is-completed .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: var(--space-2);
}

.tag-pill {
  font-size: 0.7rem;
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  font-weight: 600;
  color: white;
}

.task-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-subtle);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.task-meta-icons {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.task-meta-item {
  display: flex;
  align-items: center;
  gap: 3px;
}

.task-due-date.is-overdue {
  color: var(--danger-text);
  font-weight: 700;
}

/* Modals & Dialogs */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: var(--surface-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  border: 1px solid var(--border-medium);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-dialog.large {
  max-width: 900px;
}

.modal-backdrop.open .modal-dialog {
  transform: translateY(0);
}

.modal-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  background-color: var(--surface-subtle);
}

/* Form Controls */
.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background-color: var(--surface-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--text-main);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}
.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--surface-subtle);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
}
.btn-secondary:hover {
  background-color: var(--surface-hover);
}

.btn-danger {
  background-color: var(--danger);
  color: white;
}
.btn-danger:hover {
  background-color: var(--danger-hover);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn-icon {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}
.btn-icon:hover {
  background-color: var(--surface-hover);
  color: var(--text-main);
}

/* Alerts & Flash */
.alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.alert-success {
  background-color: var(--success-subtle);
  border: 1px solid var(--success);
  color: var(--success-text);
}

.alert-danger {
  background-color: var(--danger-subtle);
  border: 1px solid var(--danger);
  color: var(--danger-text);
}

/* Toast Notifications */
#toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toast {
  padding: var(--space-3) var(--space-4);
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: slideIn 0.25s ease-out;
  min-width: 280px;
  max-width: 420px;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Markdown Safe Typography */
.md-content {
  font-size: var(--text-base);
  line-height: 1.6;
}
.md-content h1, .md-content h2, .md-content h3 { margin: 1rem 0 0.5rem; }
.md-content p { margin-bottom: 0.75rem; }
.md-content ul, .md-content ol { margin: 0.5rem 0 0.75rem 1.5rem; }
.md-content pre {
  background-color: #0f172a;
  color: #f8fafc;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  margin-bottom: 0.75rem;
}
.md-content code.inline-code {
  background-color: var(--surface-subtle);
  padding: 2px 5px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.85em;
}

/* Responsive Off-Canvas Drawer for Mobile */
.mobile-nav-toggle {
  display: none;
}

@media (max-width: 900px) {
  .app-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: -260px;
    box-shadow: var(--shadow-modal);
  }
  .app-sidebar.open {
    left: 0;
  }
  .mobile-nav-toggle {
    display: inline-flex;
  }
  .board-canvas {
    padding: var(--space-3);
    gap: var(--space-3);
  }
  .board-column {
    width: 290px;
    min-width: 290px;
  }
}