/**
 * Asasify PM Global Styles
 * Lightweight, modern CSS for the entire application
 * Uses CSS custom properties for easy theming
 */

/* ============================================================================
   CSS VARIABLES (Design Tokens)
   ============================================================================ */

:root {
  /* Colors - Primary */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Colors - Secondary/Gray */
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Colors - Semantic */
  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-error: #ef4444;
  --color-error-light: #fee2e2;
  --color-info: #3b82f6;
  --color-info-light: #dbeafe;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', 'Courier New', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ============================================================================
   RESET & BASE STYLES
   ============================================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  overflow-x: hidden;
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

code, pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.font-normal { font-weight: 400; }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

/* Colors */
.text-primary { color: var(--color-primary-600); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-gray { color: var(--color-gray-600); }

.bg-primary { background-color: var(--color-primary-600); }
.bg-success { background-color: var(--color-success); }
.bg-warning { background-color: var(--color-warning); }
.bg-error { background-color: var(--color-error); }
.bg-white { background-color: #ffffff; }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }

/* ============================================================================
   COMPONENTS
   ============================================================================ */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 500;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background-color: var(--color-primary-600);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-700);
  color: white;
}

.btn-secondary {
  background-color: var(--color-gray-200);
  color: var(--color-gray-800);
}

.btn-secondary:hover {
  background-color: var(--color-gray-300);
  color: var(--color-gray-900);
}

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

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

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* Cards */
.card {
  background-color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-gray-200);
  font-weight: 600;
  color: var(--color-gray-900);
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-gray-200);
  background-color: var(--color-gray-50);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: var(--spacing-md) var(--spacing-lg);
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
  background-color: var(--color-gray-50);
  border-bottom: 2px solid var(--color-gray-200);
}

td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-gray-100);
}

tr:hover td {
  background-color: var(--color-gray-50);
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  font-size: var(--font-size-sm);
  color: var(--color-gray-700);
}

.form-control {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
}

.form-error {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-error);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge-primary {
  background-color: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.badge-error {
  background-color: var(--color-error-light);
  color: var(--color-error);
}

/* Alerts */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid;
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: var(--color-success);
  color: #065f46;
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning);
  color: #92400e;
}

.alert-error {
  background-color: var(--color-error-light);
  border-color: var(--color-error);
  color: #991b1b;
}

.alert-info {
  background-color: var(--color-info-light);
  border-color: var(--color-info);
  color: #1e40af;
}

/* Loading Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-primary-600);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  table {
    font-size: var(--font-size-sm);
  }

  th, td {
    padding: var(--spacing-sm);
  }
}

/* ============================================================================
   CUSTOM SCROLLBAR
   ============================================================================ */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

/* ============================================================================
   SELECTION
   ============================================================================ */

::selection {
  background-color: var(--color-primary-200);
  color: var(--color-primary-900);
}

/* ============================================================================
   PRINT STYLES
   ============================================================================ */

@media print {
  .no-print {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    box-shadow: none;
    border: 1px solid #000;
  }
}

/* Progress Bar */
.progress-bar {
    height: 6px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary-600);
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
}

/* Badge variants */
.badge-info {
    background-color: var(--color-info-light);
    color: var(--color-info);
}

/* Alert variants */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid;
}

.alert-success {
    background-color: var(--color-success-light);
    border-color: var(--color-success);
    color: #065f46;
}

.alert-error {
    background-color: var(--color-error-light);
    border-color: var(--color-error);
    color: #991b1b;
}

/* Form group */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Dark mode overrides */
.dark .form-control {
    background-color: var(--color-gray-800);
    border-color: var(--color-gray-600);
    color: var(--color-gray-100);
}

.dark .form-control:focus {
    border-color: var(--color-primary-500);
}

/* ============================================
   GANTT CHART STYLES
   ============================================ */

.gantt-container {
    background: white;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    overflow-x: auto;
    position: relative;
}

.gantt-header {
    display: flex;
    border-bottom: 2px solid #e5e7eb;
    background: #f9fafb;
    position: sticky;
    top: 0;
    z-index: 10;
}

.gantt-task-list {
    min-width: 320px;
    border-right: 1px solid #e5e7eb;
    background: white;
    flex-shrink: 0;
}

.gantt-timeline {
    flex: 1;
    position: relative;
    min-height: 500px;
    overflow-x: auto;
}

.gantt-timeline-content {
    position: relative;
    min-width: 100%;
}

.gantt-row {
    display: flex;
    border-bottom: 1px solid #f3f4f6;
    transition: background 0.2s;
}

.gantt-row:hover {
    background: #f9fafb;
}

.task-bar {
    position: absolute;
    height: 32px;
    border-radius: 6px;
    cursor: move;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    padding: 0 8px;
    font-size: 12px;
    color: white;
    overflow: hidden;
    white-space: nowrap;
    z-index: 20;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.task-bar:hover {
    filter: brightness(0.95);
    transform: scaleY(1.05);
    cursor: grab;
}

.task-bar:active {
    cursor: grabbing;
}

.task-bar.milestone {
    width: 16px !important;
    height: 16px !important;
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    padding: 0;
}

.progress-overlay {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: rgba(255,255,255,0.25);
    border-radius: 6px;
    pointer-events: none;
    transition: width 0.3s;
}

.grid-line {
    position: absolute;
    top: 0;
    bottom: 0;
    border-left: 1px solid #e5e7eb;
    pointer-events: none;
}

.grid-line.weekend {
    background: rgba(243, 244, 246, 0.3);
}

.grid-line.today {
    border-left: 2px solid #ef4444;
    z-index: 15;
}

.today-marker {
    position: absolute;
    top: 0;
    bottom: 0;
    border-left: 2px solid #ef4444;
    z-index: 15;
    pointer-events: none;
}

.today-label {
    position: absolute;
    top: -20px;
    left: -20px;
    background: #ef4444;
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
}

/* Task row priority indicators */
.gantt-row.priority-critical .gantt-task-list {
    border-left: 4px solid #7c3aed;
    background: #faf5ff;
}

.gantt-row.priority-high .gantt-task-list {
    border-left: 4px solid #ef4444;
}

.gantt-row.priority-medium .gantt-task-list {
    border-left: 4px solid #f59e0b;
}

.gantt-row.priority-low .gantt-task-list {
    border-left: 4px solid #10b981;
}

/* Task status indicators */
.task-status {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 8px;
    flex-shrink: 0;
}

.task-status.completed { background: #10b981; box-shadow: 0 0 0 2px #d1fae5; }
.task-status.in-progress { background: #3b82f6; box-shadow: 0 0 0 2px #dbeafe; }
.task-status.not-started { background: #9ca3af; }
.task-status.blocked { background: #ef4444; box-shadow: 0 0 0 2px #fee2e2; }
.task-status.delayed { background: #f59e0b; box-shadow: 0 0 0 2px #fed7aa; }

/* Dependency lines */
.dependency-canvas {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 25;
}

.dependency-line {
    stroke: #6b7280;
    stroke-width: 2;
    stroke-dasharray: 6, 4;
    fill: none;
}

.dependency-line:hover {
    stroke: #3b82f6;
    stroke-width: 3;
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
}

.modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #e5e7eb;
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Gantt controls */
.gantt-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.gantt-zoom-controls {
    display: flex;
    gap: 0.25rem;
    background: #f3f4f6;
    padding: 0.25rem;
    border-radius: 8px;
}

.zoom-btn {
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.zoom-btn:hover {
    background: #e5e7eb;
}

.zoom-btn.active {
    background: white;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

/* Print styles */
@media print {
    .gantt-controls,
    .modal,
    .no-print {
        display: none !important;
    }

    .gantt-container {
        box-shadow: none;
        overflow: visible;
    }

    .task-bar {
        print-color-adjust: exact;
        -webkit-print-color-adjust: exact;
    }
}