:root {
  /* Professional color palette */
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface-alt: #f8f9fb;
  --border: #e1e8ed;
  --border-dark: #cbd5e0;
  
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-tertiary: #718096;
  
  /* Brand colors - professional blues */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #dbeafe;
  
  --success: #059669;
  --success-light: #d1fae5;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --info: #0891b2;
  --info-light: #cffafe;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  
  /* 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);
  
  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-alt: #334155;
    --border: #334155;
    --border-dark: #475569;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-light: #1e3a8a;
    
    --success: #10b981;
    --success-light: #064e3b;
    --warning: #f59e0b;
    --warning-light: #78350f;
    --danger: #ef4444;
    --danger-light: #7f1d1d;
    --info: #06b6d4;
    --info-light: #164e63;
  }
}

/* Reset and base styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* Layout */
.topbar {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
  color: var(--primary);
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 1px solid var(--border);
}

.brand-title {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-title small {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.navlinks {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

/* Cards and panels */
.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-sm);
}

.card h2, .card h3 {
  margin-top: 0;
}

.card hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--space-lg) 0;
}

/* Grid layout */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: 2fr 1fr;
  }
}

/* Buttons */
.btn, .pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

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

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

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

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

.btn.secondary {
  background-color: var(--surface-alt);
  color: var(--text-primary);
  border-color: var(--border-dark);
}

.btn.secondary:hover {
  background-color: var(--border);
  color: var(--text-primary);
}

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

.btn.danger:hover {
  background-color: #b91c1c;
  border-color: #b91c1c;
  color: white;
}

.pill {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: var(--border);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.pill:hover {
  background-color: var(--surface-alt);
  color: var(--text-primary);
  border-color: var(--border-dark);
  transform: none;
  box-shadow: none;
}

.pill.danger {
  color: var(--danger);
  border-color: var(--danger);
}

.pill.danger:hover {
  background-color: var(--danger-light);
  color: var(--danger);
}

.row {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

/* Forms */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.input, input[type="text"], input[type="email"], input[type="password"], 
input[type="number"], select, textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.input:focus, input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

select {
  padding: 0.625rem 2.5rem 0.625rem 0.875rem;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  appearance: none;
}

textarea {
  min-height: 120px;
  resize: vertical;
  font-family: var(--font-sans);
}

input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  cursor: pointer;
  accent-color: var(--primary);
}

.help {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-top: var(--space-xs);
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table thead {
  background-color: var(--surface-alt);
  border-bottom: 2px solid var(--border-dark);
}

.table th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.table tbody tr:hover {
  background-color: var(--surface-alt);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.25;
  border-radius: var(--radius-sm);
  text-transform: capitalize;
}

.badge.status-open {
  background-color: var(--info-light);
  color: var(--info);
}

.badge.status-in_progress, .badge.status-in-progress {
  background-color: var(--warning-light);
  color: var(--warning);
}

.badge.status-completed, .badge.status-closed {
  background-color: var(--success-light);
  color: var(--success);
}

.badge.status-rejected, .badge.status-cancelled {
  background-color: var(--danger-light);
  color: var(--danger);
}

.badge.role-admin {
  background-color: #dbeafe;
  color: #1e40af;
}

.badge.role-dpo {
  background-color: #e0e7ff;
  color: #4338ca;
}

.badge.role-support {
  background-color: #ddd6fe;
  color: #6d28d9;
}

.badge.role-subject {
  background-color: #f3f4f6;
  color: #374151;
}

@media (prefers-color-scheme: dark) {
  .badge.role-admin {
    background-color: #1e3a8a;
    color: #93c5fd;
  }
  
  .badge.role-dpo {
    background-color: #312e81;
    color: #a5b4fc;
  }
  
  .badge.role-support {
    background-color: #4c1d95;
    color: #c4b5fd;
  }
  
  .badge.role-subject {
    background-color: #374151;
    color: #d1d5db;
  }
}

/* Flash messages */
.flash {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  border-left: 4px solid;
  font-size: 0.9375rem;
}

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

.flash.error {
  background-color: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}

.flash.info {
  background-color: var(--info-light);
  border-color: var(--info);
  color: var(--info);
}

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

/* Utilities */
.page-title {
  font-size: 1.875rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.subtle {
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.kv {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-md) var(--space-lg);
  font-size: 0.875rem;
}

.kv dt {
  font-weight: 500;
  color: var(--text-secondary);
}

.kv dd {
  color: var(--text-primary);
}

pre {
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-md);
  }
  
  .navlinks {
    width: 100%;
    justify-content: flex-start;
  }
  
  .container {
    padding: var(--space-lg) var(--space-md);
  }
  
  .card {
    padding: var(--space-lg);
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  .kv {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  
  .row {
    flex-direction: column;
    align-items: stretch;
  }
  
  .table {
    font-size: 0.8125rem;
  }
  
  .table th, .table td {
    padding: 0.5rem 0.75rem;
  }
}

/* Print styles */
@media print {
  .topbar, .navlinks, .btn, .pill {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card {
    border: 1px solid #ccc;
    box-shadow: none;
    page-break-inside: avoid;
  }
}