/* ============================================
   LinkPage Editorial Design System
   ============================================ */

:root {
  /* Typography Scale */
  --font-display: 'Playfair Display', 'Georgia', serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Color Palette - Financial Editorial Theme */
  --color-primary: #1a1a1a;
  --color-secondary: #4a4a4a;
  --color-tertiary: #757575;
  --color-accent: #0066cc;
  --color-accent-hover: #0052a3;

  --color-surface: #ffffff;
  --color-surface-alt: #f8f9fa;
  --color-border: #e0e0e0;
  --color-border-light: #f0f0f0;

  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-xxl: 6rem;

  /* Layout */
  --max-width: 900px;
  --card-radius: 2px;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

/* ============================================
   Page Layout
   ============================================ */

.page-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================
   Header Section
   ============================================ */

.site-header {
  text-align: center;
  padding: var(--space-xl) 0 var(--space-xxl);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--space-xxl);
}

.header-logo {
  margin-bottom: var(--space-md);
}

.logo-link {
  display: inline-block;
  transition: var(--transition-smooth);
}

.logo-link:hover {
  transform: translateY(-2px);
  opacity: 0.85;
}

.logo-image {
  width: 80px;
  height: auto;
  display: block;
}

.header-content {
  max-width: 650px;
  margin: 0 auto;
}

.site-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.site-tagline {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-secondary);
  font-weight: 400;
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Content Grid
   ============================================ */

.content-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xxl);
  flex: 1;
}

/* ============================================
   Link Cards - Editorial Style
   ============================================ */

.link-card {
  opacity: 0;
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  transform-origin: center;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-link {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--card-radius);
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.card-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-accent);
  transform: scaleY(0);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: bottom;
}

.card-link:hover::before {
  transform: scaleY(1);
  transform-origin: top;
}

.card-link:hover {
  border-color: var(--color-border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
  transform: translateX(4px);
}

.card-link:active {
  transform: translateX(2px);
}

/* Card Media */
.card-media {
  flex-shrink: 0;
  width: 180px;
  height: 120px;
  background: var(--color-surface-alt);
  border-radius: var(--card-radius);
  overflow: hidden;
  position: relative;
}

.card-thumbnail,
.card-thumbnail-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.card-link:hover .card-thumbnail {
  transform: scale(1.05);
}

.card-thumbnail-placeholder {
  background: linear-gradient(135deg, var(--color-surface-alt) 0%, var(--color-border-light) 100%);
}

/* Card Body */
.card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  gap: var(--space-xs);
}

.card-title {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-primary);
  margin: 0;
  transition: var(--transition-smooth);
  letter-spacing: -0.01em;
}

.card-link:hover .card-title {
  color: var(--color-accent);
}

.card-description {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-tertiary);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  margin-top: auto;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border-light);
  text-align: center;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--color-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.social-icon svg {
  width: 20px;
  height: 20px;
}

.social-icon:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.15);
}

.social-icon:active {
  transform: translateY(0);
}

.footer-credit {
  font-size: 0.875rem;
  color: var(--color-tertiary);
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.footer-credit span {
  color: var(--color-tertiary);
}

.linkpage-link {
  color: var(--color-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
}

.linkpage-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.linkpage-link:hover::after {
  transform: scaleX(1);
}

/* ============================================
   Admin Panel Styles
   ============================================ */

.admin-wrapper {
  background: var(--color-surface-alt);
}

.admin-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
}

.admin-badge {
  display: inline-block;
  margin-top: var(--space-md);
  padding: 4px 10px;
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 12px;
  font-weight: 500;
  opacity: 0.8;
}

.admin-content {
  padding: var(--space-xl) 0;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

/* Notifications */
.notification {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  border-radius: var(--card-radius);
  font-size: 0.9375rem;
  border-left: 3px solid;
  animation: slideInDown 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.notification-icon {
  font-size: 1.25rem;
  font-weight: bold;
}

.error-notification {
  background: #fef2f2;
  border-left-color: #dc2626;
  color: #991b1b;
}

.success-notification {
  background: #f0fdf4;
  border-left-color: #16a34a;
  color: #166534;
}

/* Section Styles */
.admin-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--card-radius);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}

.section-header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 0.9375rem;
  color: var(--color-tertiary);
  margin: 0;
}

.section-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: var(--space-xl) 0;
}

/* Form Styles */
.admin-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group-split {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-md);
  align-items: end;
}

.form-input-primary {
  flex: 1;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-secondary);
  letter-spacing: 0.01em;
  font-family: var(--font-body);
}

.form-input {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9375rem;
  font-family: var(--font-body);
  color: var(--color-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  transition: var(--transition-smooth);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-input::placeholder {
  color: var(--color-tertiary);
  opacity: 0.6;
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
  line-height: 1.6;
}

.form-actions {
  margin-top: var(--space-sm);
}

/* Button Styles */
.btn {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-body);
  border: none;
  border-radius: var(--card-radius);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  box-sizing: border-box;
  line-height: 1.4;
  min-height: 44px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-surface);
  width: 100%;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
  width: 100%;
}

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

/* Link Manager Cards */
.links-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.link-manager-card {
  border: 1px solid var(--color-border-light);
  border-radius: var(--card-radius);
  background: var(--color-surface-alt);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.link-manager-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

/* Link Preview */
.link-preview {
  background: var(--color-surface);
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.link-preview-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
}

.link-preview-content {
  display: flex;
  gap: var(--space-md);
  flex: 1;
  min-width: 0;
}

.link-preview-thumbnail {
  width: 120px;
  height: 80px;
  border-radius: var(--card-radius);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--color-surface-alt);
}

.link-preview-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.link-preview-placeholder {
  background: linear-gradient(135deg, var(--color-surface-alt) 0%, var(--color-border-light) 100%);
}

.link-preview-text {
  flex: 1;
  min-width: 0;
}

.link-preview-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 var(--space-xs) 0;
  line-height: 1.3;
}

.link-preview-description {
  font-size: 0.875rem;
  color: var(--color-tertiary);
  margin: 0;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.link-stats-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent);
  color: var(--color-surface);
  border-radius: var(--card-radius);
  min-width: 60px;
}

.stats-number {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-mono);
  line-height: 1;
}

.stats-label {
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.9;
  margin-top: 2px;
}

/* Link Actions Bar */
.link-actions-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
}

.link-order-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.order-weight {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-secondary);
  padding: 0 var(--space-xs);
  min-width: 30px;
  text-align: center;
}

.action-btn {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-body);
  background: var(--color-surface);
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.action-btn:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-secondary);
  transform: translateY(-1px);
}

.action-btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  font-size: 1rem;
}

.action-btn-delete {
  color: #dc2626;
  border-color: #fecaca;
}

.action-btn-delete:hover {
  background: #fef2f2;
  border-color: #dc2626;
  color: #991b1b;
}

/* Link Edit Form */
.link-edit-form {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  :root {
    --space-lg: 1.5rem;
    --space-xl: 2.5rem;
    --space-xxl: 4rem;
  }

  .site-title {
    font-size: 2rem;
  }

  .site-tagline {
    font-size: 1rem;
  }

  .card-link {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .card-media {
    width: 100%;
    height: 200px;
  }

  .card-title {
    font-size: 1.125rem;
  }

  .social-links {
    gap: var(--space-sm);
  }

  /* Admin responsive */
  .form-group-split {
    grid-template-columns: 1fr;
  }

  .link-preview-content {
    flex-direction: column;
  }

  .link-preview-thumbnail {
    width: 100%;
    height: 150px;
  }

  .admin-section {
    padding: var(--space-md);
  }

  .section-title {
    font-size: 1.5rem;
  }

  .btn {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
  }
}

@media (max-width: 480px) {
  .page-wrapper {
    padding: var(--space-md) var(--space-sm);
  }

  .site-header {
    padding: var(--space-lg) 0 var(--space-xl);
    margin-bottom: var(--space-xl);
  }

  .logo-image {
    width: 60px;
  }

  .site-title {
    font-size: 1.75rem;
  }

  .content-grid {
    gap: var(--space-sm);
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  .site-footer,
  .social-links {
    display: none;
  }

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