/* ===== CSS Custom Properties ===== */
:root {
  --primary: #0077B6;
  --primary-dark: #005f8f;
  --secondary: #00B4D8;
  --accent: #FF6B35;
  --accent-dark: #e55a28;
  --bg: #FAFAFA;
  --bg-alt: #F0F4F8;
  --text: #2D3436;
  --text-light: #636E72;
  --card-bg: #FFFFFF;
  --border: #DFE6E9;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --radius-sm: 4px;
  --max-width: 1200px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ===== Layout ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page {
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.main-content {
  min-height: calc(100vh - 140px);
}

/* ===== Navigation ===== */
.navbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 2px;
}

.nav-logo:hover {
  color: var(--primary-dark);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

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

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  padding: 6rem 1.5rem;
  text-align: center;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.1;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Sections ===== */
.section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
}

.section-link {
  color: var(--primary);
  font-weight: 500;
}

/* ===== Card Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* ===== Card ===== */
.card {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  color: var(--text);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--text);
}

.card-image {
  height: 200px;
  overflow: hidden;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-placeholder {
  font-size: 3rem;
  opacity: 0.3;
}

.card-body {
  padding: 1.25rem;
  flex: 1;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.card-excerpt {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  color: var(--text-light);
  font-size: 0.85rem;
}

/* ===== Badges ===== */
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.category-badge {
  background: var(--secondary);
  color: #fff;
}

.status-badge {
  margin-left: 0.5rem;
}

.status-draft {
  background: #b2bec3;
  color: #fff;
}

.status-published {
  background: #00b894;
  color: #fff;
}

/* ===== Tag Pills ===== */
.tag-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tag-pill {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s;
}

.tag-pill:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.tag-pill.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

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

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

.btn-secondary:hover:not(:disabled) {
  background: var(--border);
  color: var(--text);
}

.btn-danger {
  background: #d63031;
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: #b71c1c;
  color: #fff;
}

.btn-small {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-full {
  width: 100%;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="url"],
.form-group input[type="date"],
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--card-bg);
  color: var(--text);
  transition: border-color 0.2s;
}

.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(0, 119, 182, 0.1);
}

.form-group textarea {
  resize: vertical;
}

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

.form-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}

.form-label-row label {
  margin-bottom: 0;
}

.form-checkbox label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding-top: 1.6rem;
}

.form-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
}

.form-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* ===== Detail Pages ===== */
.back-link {
  display: inline-block;
  margin-bottom: 1.5rem;
  color: var(--text-light);
  font-weight: 500;
}

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

.detail-header {
  margin-bottom: 1.5rem;
}

.detail-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-top: 0.5rem;
}

.detail-image {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 2rem;
  max-height: 500px;
}

.detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.detail-body {
  max-width: 800px;
  margin-bottom: 2rem;
}

.detail-sidebar {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.detail-info strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.25rem;
}

/* ===== Blog Post Detail ===== */
.post-header {
  margin-bottom: 2rem;
}

.post-header h1 {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.post-date {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ===== Markdown Content ===== */
.markdown-content h1,
.markdown-content h2,
.markdown-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.markdown-content p {
  margin-bottom: 1rem;
}

.markdown-content ul,
.markdown-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.markdown-content img {
  border-radius: var(--radius);
  margin: 1rem 0;
}

.markdown-content blockquote {
  border-left: 3px solid var(--primary);
  padding-left: 1rem;
  color: var(--text-light);
  margin: 1rem 0;
}

.markdown-content code {
  background: var(--bg-alt);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

.markdown-content pre {
  background: var(--bg-alt);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1rem 0;
}

.markdown-content pre code {
  padding: 0;
  background: none;
}

/* ===== Filters ===== */
.filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.filter-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
}

.filter-group select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  background: var(--card-bg);
  color: var(--text);
}

/* ===== Auth Page ===== */
.auth-page {
  display: flex;
  justify-content: center;
  padding-top: 4rem;
}

.auth-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 420px;
}

.auth-card h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.auth-subtitle {
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

/* ===== Alerts ===== */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

/* ===== Admin Dashboard ===== */
.dashboard-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.dashboard-header h1 {
  margin-bottom: 0.25rem;
}

.dashboard-header p {
  color: var(--text-light);
}

.dashboard-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

/* ===== Tabs ===== */
.tab-bar {
  display: flex;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.5rem;
}

.tab {
  padding: 0.75rem 1.5rem;
  border: none;
  background: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-light);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}

.tab:hover {
  color: var(--primary);
}

.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ===== Admin List ===== */
.admin-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.admin-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.admin-list-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.admin-list-info h3 {
  font-size: 1rem;
  font-weight: 600;
}

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

/* ===== Editor ===== */
.editor-form {
  max-width: 800px;
}

.preview-box {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  min-height: 200px;
  background: var(--card-bg);
}

.image-preview {
  margin-top: 0.75rem;
  max-width: 300px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.upload-status {
  margin-left: 0.5rem;
  color: var(--text-light);
  font-size: 0.85rem;
}

/* ===== States ===== */
.loading {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-light);
  font-size: 1rem;
}

.error {
  text-align: center;
  padding: 2rem 1rem;
  color: #d63031;
}

.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-light);
}

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--text-light);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ===== Directory Map ===== */
.directory-map {
  height: 400px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 2rem;
  z-index: 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero {
    padding: 4rem 1.5rem;
  }

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

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

  .nav-links {
    gap: 1rem;
  }

  .dashboard-header {
    flex-direction: column;
    gap: 1rem;
  }

  .dashboard-actions {
    flex-direction: column;
  }

  .admin-list-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .filters {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .nav-container {
    height: 56px;
  }

  .nav-logo {
    font-size: 1.25rem;
  }

  .container {
    padding: 0 1rem;
  }
}