/* CSS Variables */
:root {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2a2a2a;
  --bg-tertiary: #333333;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #888888;
  --accent-primary: #8b0000;
  --accent-secondary: #a52a2a;
  --accent-light: #cd5c5c;
  --border-color: #444444;
  --success: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --info: #17a2b8;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navigation */
.navbar {
  background-color: var(--bg-secondary);
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.nav-brand a {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-user-dropdown {
  position: relative;
}

.nav-user-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.nav-user-toggle:hover {
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
  border-color: var(--border-color);
}

.nav-user-icon {
  font-size: 1rem;
}

.nav-user-name {
  font-weight: 500;
}

.nav-user-arrow {
  font-size: 0.7rem;
  opacity: 0.6;
  transition: transform 0.2s;
}

.nav-user-dropdown:hover .nav-user-arrow {
  transform: rotate(180deg);
}

.nav-user-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.25rem;
  min-width: 160px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s;
  z-index: 100;
}

.nav-user-dropdown:hover .nav-user-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-user-menu a {
  display: block;
  padding: 0.6rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s;
}

.nav-user-menu a:first-child {
  border-radius: 6px 6px 0 0;
}

.nav-user-menu a:last-child {
  border-radius: 0 0 6px 6px;
}

.nav-user-menu a:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-user-menu a.logout:hover {
  color: var(--accent-light);
}

/* Main Container */
.container {
  flex: 1;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* Footer */
.footer {
  background-color: var(--bg-secondary);
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-content {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer a:hover {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.2s;
}

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

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

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

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

.btn-danger:hover {
  background-color: #c82333;
}

.btn-small {
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
}

.btn-large {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.btn-block {
  display: block;
  width: 100%;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.form-group small {
  display: block;
  margin-top: 0.25rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.form-inline {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.form-inline input,
.form-inline select {
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.form-standard {
  max-width: 400px;
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 1rem;
}

/* Alerts */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}

.alert-error {
  background-color: rgba(220, 53, 69, 0.2);
  border: 1px solid var(--danger);
  color: #ff6b6b;
}

.alert-success {
  background-color: rgba(40, 167, 69, 0.2);
  border: 1px solid var(--success);
  color: #6bff6b;
}

.alert-warning {
  background-color: rgba(255, 193, 7, 0.2);
  border: 1px solid var(--warning);
  color: var(--warning);
}

/* Login Page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 1rem;
}

.login-box {
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.login-logo {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo img {
  max-width: 150px;
  height: auto;
}

.login-logo h1 {
  font-size: 1.5rem;
  margin-top: 1rem;
}

/* Home Page */
.home-page {
  text-align: center;
}

.hero {
  padding: 2rem 0;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.logo-container {
  margin: 2rem 0;
}

.hero-logo {
  max-width: 300px;
  height: auto;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.2rem;
}

.quick-search {
  max-width: 600px;
  margin: 2rem auto;
}

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

.search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 1rem;
}

.categories-section {
  margin-top: 3rem;
}

.categories-intro {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
}

.category-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  text-decoration: none;
  transition: all 0.2s;
}

.category-link:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--accent-primary);
}

.category-icon::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  background-color: var(--accent-primary);
  border-radius: 50%;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--text-secondary);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--text-primary);
}

.breadcrumbs .separator {
  color: var(--text-muted);
}

.breadcrumbs .current {
  color: var(--text-primary);
}

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

.toolbar-left, .toolbar-right {
  display: flex;
  gap: 0.5rem;
}

.files-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-secondary);
  border-radius: 6px;
  overflow: hidden;
}

.files-table th,
.files-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.files-table th {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-weight: 500;
}

.files-table tbody tr:hover {
  background-color: var(--bg-tertiary);
}

.files-table .col-icon {
  width: 40px;
}

.files-table .col-size {
  width: 100px;
}

.files-table .col-modified {
  width: 120px;
}

.file-link {
  color: var(--text-primary);
  text-decoration: none;
}

.file-link:hover {
  color: var(--accent-light);
}

.folder-link {
  font-weight: 500;
}

.preview-link {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 0.5rem;
}

.preview-link:hover {
  color: var(--text-primary);
}

/* File Icons */
.file-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  text-align: center;
  line-height: 20px;
}

.file-icon-folder::before { content: '📁'; }
.file-icon-image::before { content: '🖼️'; }
.file-icon-video::before { content: '🎬'; }
.file-icon-audio::before { content: '🎵'; }
.file-icon-pdf::before { content: '📕'; }
.file-icon-document::before { content: '📄'; }
.file-icon-archive::before { content: '📦'; }
.file-icon-cad::before { content: '📐'; }
.file-icon-file::before { content: '📄'; }

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

/* Search Page */
.search-page h1 {
  margin-bottom: 1.5rem;
}

.search-form-large {
  margin-bottom: 2rem;
}

.search-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.search-input-large {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 1.1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.search-filters {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.search-filters label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
}

.search-filters select {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.results-summary {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.results-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.result-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border-radius: 4px;
}

.result-icon {
  font-size: 1.5rem;
}

.result-info {
  flex: 1;
}

.result-name {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
}

.result-name:hover {
  color: var(--accent-light);
}

.result-path {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.result-meta {
  display: flex;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.page-info {
  color: var(--text-secondary);
}

/* Admin Pages */
.admin-page h1 {
  margin-bottom: 1.5rem;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.admin-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.admin-card {
  display: block;
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  text-decoration: none;
  transition: all 0.2s;
}

.admin-card:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--accent-primary);
}

.admin-card-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.admin-card-title {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 500;
}

.admin-card-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.admin-section {
  margin-bottom: 2rem;
}

.admin-section h2 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-secondary);
  border-radius: 6px;
  overflow: hidden;
}

.admin-table th,
.admin-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.admin-table th {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-weight: 500;
}

.admin-table tbody tr:hover {
  background-color: var(--bg-tertiary);
}

.admin-table .actions {
  white-space: nowrap;
}

.admin-table .actions form {
  display: inline;
}

.admin-toolbar {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.badge-admin {
  background-color: var(--accent-primary);
  color: white;
}

.badge-user {
  background-color: var(--info);
  color: white;
}

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

.badge-inactive {
  background-color: var(--text-muted);
  color: var(--bg-primary);
}

.action-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
}

.action-login { background-color: var(--info); color: white; }
.action-logout { background-color: var(--text-muted); color: var(--bg-primary); }
.action-upload { background-color: var(--success); color: white; }
.action-download { background-color: var(--info); color: white; }
.action-delete { background-color: var(--danger); color: white; }
.action-create { background-color: var(--success); color: white; }
.action-password { background-color: var(--warning); color: var(--bg-primary); }

.details-cell {
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: 8px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content h2 {
  margin-bottom: 1.5rem;
}

/* Upload Zone */
.upload-zone {
  border: 2px dashed var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent-primary);
  background-color: rgba(139, 0, 0, 0.1);
}

.upload-zone input[type="file"] {
  display: none;
}

.upload-item {
  padding: 0.5rem;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  margin-top: 0.5rem;
  font-size: 0.9rem;
}

.progress-bar {
  height: 20px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  margin: 1rem 0;
}

.progress-fill {
  height: 100%;
  background-color: var(--success);
  width: 0;
  transition: width 0.3s;
}

.progress-text {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Disclaimer Page */
.disclaimer-page section {
  margin-bottom: 2rem;
}

.disclaimer-page h2 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.disclaimer-page p {
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.news-item {
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 6px;
  margin-bottom: 1rem;
}

.news-date {
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: 0.5rem;
}

/* Error Page */
.error-page {
  text-align: center;
  padding: 3rem;
}

.error-page h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.error-message {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.error-stack {
  text-align: left;
  background-color: var(--bg-secondary);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 0.5rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-user-dropdown {
    margin-top: 0.5rem;
  }

  .nav-user-menu {
    right: auto;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
  }

  .nav-user-dropdown:hover .nav-user-menu {
    transform: translateX(-50%) translateY(0);
  }

  .container {
    padding: 1rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-logo {
    max-width: 200px;
  }

  .files-table .col-size,
  .files-table .col-modified {
    display: none;
  }

  .footer-content {
    flex-direction: column;
    gap: 0.5rem;
  }
}