/* ============================================
   LIFTING PLAN PRO - STYLES
   Modern, Professional Design System
   ============================================ */

/* ============================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */
:root {
  /* Colors - Primary Palette */
  --primary: #1a3a6c;
  --primary-dark: #152e56;
  --primary-light: #2c5282;

  --secondary: #e63946;
  --secondary-dark: #c62828;

  --accent: #2a9d8f;
  --accent-dark: #22837c;

  --success: #2ecc71;
  --success-dark: #27ae60;

  --warning: #ff9e6d;
  --warning-dark: #ffa000;

  --info: #3498db;
  --info-dark: #1976d2;

  --danger: #e74c3c;

  /* Neutral Colors */
  --light: #f8f9fa;
  --gray-light: #e4edf5;
  --gray: #6c757d;
  --dark: #212529;
  --white: #ffffff;

  /* Backgrounds */
  --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
  --bg-header: linear-gradient(120deg, var(--primary) 0%, var(--primary-light) 100%);

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 20px;
  --spacing-lg: 30px;
  --spacing-xl: 40px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 30px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 15px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.2);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Typography */
  --font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --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: 2rem;

  /* Max Widths */
  --container-max: 1400px;
  --content-max: 900px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--dark);
  background: var(--bg-gradient);
  padding: var(--spacing-md);
  min-height: 100vh;
}

/* ============================================
   MAIN CONTAINER
   ============================================ */
.app-container {
  max-width: var(--container-max);
  margin: 0 auto;
}

/* ============================================
   HEADER
   ============================================ */
.app-header {
  background: var(--bg-header);
  color: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.app-header::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
  z-index: 0;
}

.header-content {
  position: relative;
  z-index: 1;
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.app-header h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-xs);
}

.subtitle {
  font-size: var(--font-size-xl);
  opacity: 0.95;
  margin-bottom: var(--spacing-sm);
}

.standards-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.user-section {
  position: relative;
  z-index: 1;
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.user-input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.user-input-group label {
  font-weight: 600;
  white-space: nowrap;
}

.user-input {
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid rgba(255, 255, 255, 0.3);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  color: var(--dark);
  font-size: var(--font-size-base);
  min-width: 200px;
}

.user-input:focus {
  outline: none;
  border-color: var(--white);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.current-date {
  background: rgba(255, 255, 255, 0.2);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  font-weight: 600;
}

/* ============================================
   PROGRESS SECTION
   ============================================ */
.progress-section {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.progress-header h2 {
  color: var(--primary);
  font-size: var(--font-size-2xl);
}

.progress-stats {
  color: var(--gray);
  font-weight: 600;
}

.progress-bar-container {
  height: 12px;
  background: var(--gray-light);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--success) 0%, var(--accent) 100%);
  width: 0%;
  transition: width var(--transition-slow);
  border-radius: var(--radius-pill);
}

.phase-indicators {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: space-between;
  flex-wrap: wrap;
}

.phase-indicator {
  flex: 1;
  min-width: 80px;
  text-align: center;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  background: var(--light);
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.phase-indicator:hover {
  background: var(--gray-light);
  transform: translateY(-2px);
}

.phase-indicator.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary-dark);
  box-shadow: var(--shadow-md);
}

.phase-indicator.completed {
  background: var(--success);
  color: var(--white);
}

.phase-number {
  width: 36px;
  height: 36px;
  margin: 0 auto var(--spacing-xs);
  background: rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.phase-indicator.active .phase-number {
  background: rgba(255, 255, 255, 0.2);
}

.phase-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
}

/* ============================================
   ACTION BAR
   ============================================ */
.action-bar {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: center;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  background: var(--primary);
  color: var(--white);
  border: none;
  padding: 14px 28px;
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  font-family: var(--font-family);
  box-shadow: var(--shadow-sm);
}

.btn:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
  background: #5a6268;
}

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

.btn-success:hover:not(:disabled) {
  background: var(--success-dark);
}

.btn-warning {
  background: var(--warning);
  color: var(--dark);
}

.btn-warning:hover:not(:disabled) {
  background: var(--warning-dark);
}

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

.btn-danger:hover:not(:disabled) {
  background: #c0392b;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.main-content {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  min-height: 500px;
}

.phase-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

.phase-content.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.phase-header-section {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 3px solid var(--accent);
}

.phase-header-section h2 {
  color: var(--primary);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-xs);
}

.phase-description {
  color: var(--gray);
  font-size: var(--font-size-lg);
}

/* ============================================
   FORM CARDS
   ============================================ */
.form-card {
  background: var(--light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border-left: 4px solid var(--accent);
}

.card-title {
  color: var(--primary);
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--gray-light);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--dark);
}

.form-group label.required::after {
  content: " *";
  color: var(--danger);
  font-weight: 700;
}

.form-group input[type="text"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid #ddd;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 58, 108, 0.2);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

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

.alert-warning {
  background: #fff8e6;
  border-color: var(--warning);
  color: #856404;
}

.alert-info {
  background: #e3f2fd;
  border-color: var(--info);
  color: #0d47a1;
}

.alert-danger {
  background: #ffebee;
  border-color: var(--danger);
  color: #c62828;
}

.alert-success {
  background: #e8f5e9;
  border-color: var(--success);
  color: #2e7d32;
}

.alert strong {
  font-weight: 700;
}

/* ============================================
   CHECKLIST
   ============================================ */
.checklist-section {
  margin-bottom: var(--spacing-lg);
}

.checklist-section h4 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--gray-light);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.checkbox-label:hover {
  background: rgba(0, 0, 0, 0.03);
}

.checkbox-label input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  cursor: pointer;
  flex-shrink: 0;
}

.checkbox-label span {
  flex: 1;
  user-select: none;
}

.checkbox-label input[type="checkbox"]:checked+span {
  text-decoration: line-through;
  opacity: 0.7;
  color: var(--success);
}

/* ============================================
   CONSTRUCTION NOTICE
   ============================================ */
.construction-notice {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--gray-light);
  border-radius: var(--radius-md);
  border: 2px dashed var(--gray);
}

.construction-notice h3 {
  color: var(--primary);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-sm);
}

.construction-notice p {
  color: var(--gray);
  font-size: var(--font-size-lg);
}

/* ============================================
   NAVIGATION
   ============================================ */
.phase-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.phase-info {
  font-weight: 600;
  color: var(--primary);
  font-size: var(--font-size-lg);
}

/* ============================================
   FOOTER
   ============================================ */
.app-footer {
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--gray);
  font-size: var(--font-size-sm);
  border-top: 1px solid #dee2e6;
  margin-top: var(--spacing-xl);
}

.app-footer p {
  margin-bottom: var(--spacing-xs);
}

.legal-notice {
  font-style: italic;
  opacity: 0.8;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  body {
    background: var(--white);
    padding: 0;
  }

  .action-bar,
  .phase-navigation,
  .progress-section,
  .app-footer,
  .btn {
    display: none !important;
  }

  .app-header {
    background: var(--white);
    color: var(--dark);
    box-shadow: none;
    border-bottom: 2px solid var(--dark);
  }

  .main-content {
    box-shadow: none;
    padding: var(--spacing-md);
  }

  .phase-content {
    display: block !important;
    page-break-after: always;
  }

  .form-card {
    page-break-inside: avoid;
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  body {
    padding: var(--spacing-sm);
  }

  .app-header {
    padding: var(--spacing-md);
  }

  .app-header h1 {
    font-size: var(--font-size-2xl);
  }

  .subtitle {
    font-size: var(--font-size-lg);
  }

  .user-section {
    flex-direction: column;
    align-items: stretch;
  }

  .user-input-group {
    flex-direction: column;
    align-items: stretch;
  }

  .user-input {
    width: 100%;
  }

  .phase-indicators {
    gap: var(--spacing-xs);
  }

  .phase-indicator {
    min-width: 60px;
    padding: var(--spacing-xs);
  }

  .phase-number {
    width: 28px;
    height: 28px;
    font-size: var(--font-size-base);
  }

  .phase-name {
    font-size: 0.75rem;
  }

  .main-content {
    padding: var(--spacing-md);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .action-bar {
    flex-direction: column;
  }

  .action-bar .btn {
    width: 100%;
  }

  .phase-navigation {
    flex-direction: column;
  }

  .phase-navigation .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .standards-badge {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .phase-indicators {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--spacing-xs);
  }

  .phase-indicator {
    flex-shrink: 0;
  }
}

/* ============================================
   RESULT BOXES
   ============================================ */
.result-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  text-align: center;
  margin-top: var(--spacing-md);
  box-shadow: var(--shadow-lg);
}

.result-label {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.9;
  margin-bottom: var(--spacing-xs);
}

.result-value {
  font-size: var(--font-size-3xl);
  font-weight: 700;
}

.result-box.safe {
  background: linear-gradient(135deg, var(--success) 0%, var(--success-dark) 100%);
}

.result-box.warning {
  background: linear-gradient(135deg, var(--warning) 0%, var(--warning-dark) 100%);
  color: var(--dark);
}

.result-box.danger {
  background: linear-gradient(135deg, var(--danger) 0%, #c0392b 100%);
}

/* ============================================
   RISK ASSESSMENT TABLE
   ============================================ */
.risk-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.risk-table th,
.risk-table td {
  padding: var(--spacing-sm);
  border: 1px solid var(--gray-light);
  vertical-align: top;
}

.risk-table th {
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  text-align: left;
}

.risk-table tr.risk-high {
  background: #ffebee;
}

.risk-table tr.risk-medium {
  background: #fff8e1;
}

.risk-table tr.risk-low {
  background: #e8f5e9;
}

.risk-input,
.risk-control {
  width: 100%;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
}

.risk-control {
  resize: vertical;
  min-height: 50px;
}

.risk-score,
.risk-level {
  display: inline-block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.risk-high .risk-level {
  background: var(--danger);
  color: var(--white);
}

.risk-medium .risk-level {
  background: var(--warning);
  color: var(--dark);
}

.risk-low .risk-level {
  background: var(--success);
  color: var(--white);
}

.btn-small {
  padding: 6px 12px;
  font-size: var(--font-size-sm);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
}

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

.btn-small.btn-danger:hover {
  background: #c0392b;
}

/* ============================================
   SEQUENCE OF OPERATIONS
   ============================================ */
.sequence-section {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-light);
}

.sequence-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px dashed var(--gray-light);
}

.sequence-item:last-child {
  border-bottom: none;
}

.step-number {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.sequence-input {
  flex: 1;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
}

.sequence-input:focus {
  outline: none;
  border-color: var(--primary);
}

/* ============================================
   CONTINGENCY ITEMS
   ============================================ */
.contingency-item {
  margin-bottom: var(--spacing-md);
}

.contingency-item h4 {
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

.contingency-item textarea {
  width: 100%;
  padding: 12px;
  border: 2px solid #ddd;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  resize: vertical;
  min-height: 70px;
}

.contingency-item textarea:focus {
  outline: none;
  border-color: var(--primary);
}

/* ============================================
   FINAL CHECKLIST GRID
   ============================================ */
.checklist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-xs);
}

.checklist-grid .checkbox-label {
  margin-bottom: 0;
}

.checklist-grid .checkbox-label.mandatory {
  background: #fff8e1;
  border-left: 3px solid var(--warning);
}

.checklist-grid .checkbox-label.mandatory:hover {
  background: #fff3cd;
}

.checklist-grid .checkbox-label input:checked+span {
  text-decoration: none;
  opacity: 1;
  color: var(--success);
}

/* ============================================
   ACCENT BUTTON
   ============================================ */
.btn-accent {
  background: var(--accent);
  color: var(--white);
}

.btn-accent:hover:not(:disabled) {
  background: var(--accent-dark);
}

/* ============================================
   RESPONSIVE TABLES
   ============================================ */
@media (max-width: 768px) {
  .risk-table {
    display: block;
    overflow-x: auto;
  }

  .checklist-grid {
    grid-template-columns: 1fr;
  }

  .sequence-item {
    flex-wrap: wrap;
  }

  .sequence-input {
    width: 100%;
    margin-top: var(--spacing-xs);
  }
}

/* ============================================
   EXAMPLE MODAL STYLES
   ============================================ */
.example-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  animation: fadeIn 0.3s ease;
  padding: var(--spacing-md);
}

.example-modal {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 900px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.example-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--gray-light);
  padding-bottom: var(--spacing-md);
}

.example-modal-header h2 {
  color: var(--primary);
  margin: 0;
  font-size: var(--font-size-2xl);
}

.example-modal-close {
  background: none;
  border: none;
  font-size: 32px;
  cursor: pointer;
  color: var(--gray);
  transition: color var(--transition-fast);
  padding: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.example-modal-close:hover {
  color: var(--danger);
  background: rgba(231, 76, 60, 0.1);
}

.example-modal-body {
  padding: var(--spacing-md) 0;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.example-card {
  border: 2px solid var(--gray-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
  background: var(--light);
}

.example-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  border-color: var(--accent);
  background: var(--white);
}

.example-icon {
  font-size: 56px;
  margin-bottom: var(--spacing-md);
}

.example-card h3 {
  color: var(--primary);
  margin: var(--spacing-sm) 0;
  font-size: var(--font-size-lg);
}

.example-card p {
  color: var(--gray);
  font-size: var(--font-size-sm);
  margin: var(--spacing-sm) 0 var(--spacing-md);
  line-height: 1.5;
}

.example-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--info);
  color: var(--white);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-top: var(--spacing-sm);
}

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

.example-badge.danger {
  background: var(--danger);
}

/* ============================================
   DRAWING CANVAS STYLES
   ============================================ */
.drawing-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--light);
  border-radius: var(--radius-md);
  border: 2px solid var(--gray-light);
}

.drawing-tool-btn {
  padding: 12px 18px;
  border: 2px solid var(--gray-light);
  background: var(--white);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--dark);
  font-family: var(--font-family);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.drawing-tool-btn:hover {
  background: #e3f2fd;
  border-color: var(--info);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.drawing-tool-btn.active {
  background: var(--info);
  color: var(--white);
  border-color: #0d47a1;
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
}

.canvas-container {
  border: 2px solid var(--gray-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  margin-bottom: var(--spacing-md);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

#diagramCanvas {
  display: block;
  width: 100%;
  height: auto;
  cursor: crosshair;
  background: #f8f9fa;
}

.canvas-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  align-items: center;
  padding: var(--spacing-md);
  background: var(--light);
  border-radius: var(--radius-md);
  border: 2px solid var(--gray-light);
}

.canvas-control-item {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: var(--font-size-base);
  color: var(--dark);
}

.canvas-control-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.canvas-controls select {
  padding: 8px 12px;
  border: 2px solid var(--gray-light);
  border-radius: var(--radius-sm);
  background: var(--white);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: border-color 0.2s;
}

.canvas-controls select:focus {
  outline: none;
  border-color: var(--primary);
}

.canvas-controls .btn-small {
  padding: 8px 16px;
  font-size: var(--font-size-sm);
}

.info-box {
  background: #e3f2fd;
  border-left: 4px solid var(--info);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  color: #0d47a1;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.info-box strong {
  font-weight: 700;
}

/* ============================================
   DRAWING CANVAS RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .example-grid {
    grid-template-columns: 1fr;
  }

  .example-modal {
    padding: var(--spacing-lg);
    max-height: 90vh;
  }

  .drawing-toolbar {
    gap: 8px;
  }

  .drawing-tool-btn {
    padding: 10px 14px;
    font-size: var(--font-size-sm);
    flex: 1 1 calc(50% - 4px);
    min-width: 120px;
  }

  .canvas-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .canvas-control-item {
    justify-content: space-between;
  }

  .canvas-controls .btn-small {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .drawing-tool-btn {
    font-size: 0.8rem;
    padding: 8px 10px;
  }

  .example-icon {
    font-size: 42px;
  }

  .example-card h3 {
    font-size: var(--font-size-base);
  }
}