@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@24,400,0,0');

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

:root {
  --bg: #f5f5f5;
  --surface: #ffffff;
  --surface-variant: #f0f0f3;
  --border: #e0e0e0;
  --text: #1d1b20;
  --text-secondary: #49454f;
  --text-muted: #79747e;
  --primary: #1a73e8;
  --primary-container: #d3e3fd;
  --primary-hover: #1557b0;
  --danger: #b3261e;
  --danger-container: #f9dedc;
  --success: #1e8e3e;
  --success-container: #c4eed0;
  --warning: #e37400;
  --warning-container: #ffddb5;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-xl: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --transition: 200ms cubic-bezier(0.2, 0, 0, 1);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Navbar - Material 3 style */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  height: 64px;
  gap: 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-brand a {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  flex: 1;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
  transition: background var(--transition), color var(--transition);
}

.nav-links a:hover {
  background: var(--surface-variant);
  color: var(--text);
}

.nav-links .admin-link {
  color: var(--warning);
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Container */
.container {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  flex: 1;
}

/* Buttons - Material 3 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius-xl);
  background: var(--surface-variant);
  color: var(--text);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  line-height: 1.4;
  transition: background var(--transition), box-shadow var(--transition);
  font-family: inherit;
}

.btn:hover {
  background: var(--border);
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow-md);
}

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

.btn-danger:hover {
  background: #f2c0bd;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8rem;
}

.btn-block {
  display: flex;
  width: 100%;
  text-align: center;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
}

/* Forms - Material 3 */
.form {
  max-width: 600px;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: 0.375rem;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-container);
}

.form-help {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.375rem;
  line-height: 1.4;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 2rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 400;
  cursor: pointer;
  font-size: 0.9rem;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

/* Alerts - Material 3 */
.alert {
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.alert-success {
  background: var(--success-container);
  color: var(--success);
}

.alert-error {
  background: var(--danger-container);
  color: var(--danger);
}

.alert-info {
  background: var(--primary-container);
  color: var(--primary);
}

/* Tables - Material 3 */
.table-wrapper {
  overflow-x: auto;
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

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

th, td {
  padding: 0.875rem 1rem;
  text-align: left;
  font-size: 0.875rem;
}

th {
  background: var(--surface-variant);
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
}

td {
  border-bottom: 1px solid var(--surface-variant);
}

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

tr:hover td {
  background: var(--surface-variant);
}

td a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

td a:hover {
  text-decoration: underline;
}

.actions {
  display: flex;
  gap: 0.375rem;
  align-items: center;
}

.actions form {
  display: inline;
}

/* Badges - Material 3 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

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

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

/* Page header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* Search */
.search-form {
  display: flex;
  gap: 0.5rem;
}

.search-form .form-control {
  width: 280px;
  border-radius: var(--radius-xl);
  padding: 0.5rem 1rem;
}

/* Cards - Material 3 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow var(--transition), transform var(--transition);
  display: block;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--text);
}

.card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  padding-top: 0.75rem;
  border-top: 1px solid var(--surface-variant);
}

/* View page */
.view-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.view-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.view-header .meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.view-actions {
  display: flex;
  gap: 0.5rem;
}

.page-content-container {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: white;
  min-height: calc(100vh - 220px);
}

/* Login - Material 3 */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #e8eaf6 0%, #e3f2fd 50%, #e8f5e9 100%);
}

.login-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-xl);
}

.login-card h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.login-card p {
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}

.empty-state p {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.empty-state .btn {
  margin-top: 1rem;
}

/* Error page */
.error-page {
  text-align: center;
  padding: 4rem 1rem;
}

.error-page h1 {
  font-size: 5rem;
  color: var(--border);
  font-weight: 700;
}

.error-page p {
  margin: 1rem 0 2rem;
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Admin nav - Material 3 tab bar */
.admin-nav {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 2rem;
  background: var(--surface-variant);
  border-radius: var(--radius-xl);
  padding: 0.25rem;
  width: fit-content;
}

.admin-nav .btn {
  background: transparent;
  border-radius: var(--radius-xl);
}

.admin-nav .btn:hover {
  background: var(--border);
}

.admin-nav .active {
  background: var(--primary) !important;
  color: white !important;
}

/* Footer */
.footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}

/* Code */
code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.8em;
  background: var(--surface-variant);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-wrap: wrap;
    height: auto;
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.25rem;
  }

  .search-form .form-control {
    width: 180px;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .container {
    padding: 1.25rem 1rem;
  }

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