/* ==========================================
   Landing Page Styles - androidwedakarayo.com Style
   ========================================== */

/* ==========================================
   CSS Variables & Theme Configuration
   ========================================== */

:root {
  /* Colors - Light Mode */
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-background: #ffffff;
  --color-surface: #f8f9fa;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;
  --color-border: #e5e7eb;
  --color-category: #10b981;

  /* Typography */
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Layout */
  --max-width: 1280px;
  --header-height: 70px;
  --sidebar-width: 380px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Dark Mode */
[data-theme="dark"] {
  --color-background: #0f0f0f;
  --color-surface: #1a1a1a;
  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0a0;
  --color-text-tertiary: #666666;
  --color-border: #2a2a2a;
}

/* ==========================================
   Base Styles
   ========================================== */

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

body {
  font-family: var(--font-primary);
  background-color: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

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

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand .logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-auth {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background-color: transparent;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.nav-link:hover {
  background-color: var(--color-surface);
}

.nav-link-ghost {
  border-color: var(--color-border);
  background-color: var(--color-surface);
}

.nav-link-ghost:hover {
  border-color: var(--color-text-tertiary);
}

.nav-link-button {
  cursor: pointer;
}

.nav-link-button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.nav-btn {
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.nav-btn:hover {
  background-color: var(--color-surface);
  color: var(--color-text-primary);
}

/* Dark mode toggle icons */
[data-theme="light"] .moon-icon,
[data-theme="dark"] .sun-icon {
  display: none;
}

[data-theme="light"] .sun-icon,
[data-theme="dark"] .moon-icon {
  display: block;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--color-primary);
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================
   Main Layout
   ========================================== */

.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl);
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--spacing-2xl);
}

.main-column {
  min-width: 0;
}

/* ==========================================
   Hero Article
   ========================================== */

.hero-article {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--spacing-2xl);
  cursor: pointer;
}

.hero-article a {
  display: block;
  position: relative;
}

.hero-image {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}

.hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-2xl);
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.9) 0%,
    rgba(0, 0, 0, 0.5) 50%,
    transparent 100%
  );
  color: white;
}

.hero-category {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background-color: var(--color-category);
  color: white;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-md);
}

.hero-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: white;
}

.hero-date {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================
   Article List
   ========================================== */

.article-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.article-item {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.article-item:last-child {
  border-bottom: none;
}

.article-content {
  display: flex;
  flex-direction: column;
}

.article-title {
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

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

.article-excerpt {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: auto;
}

.article-category {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  background-color: var(--color-surface);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.article-date,
.article-read-time {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.article-meta-separator {
  color: var(--color-text-tertiary);
}

.article-thumbnail {
  width: 200px;
  height: 130px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.article-item:hover .article-thumbnail img {
  transform: scale(1.05);
}

/* ==========================================
   Loading & Empty States
   ========================================== */

.loading-card,
.error-state {
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--color-border);
  text-align: center;
  color: var(--color-text-secondary);
}

.loading-line {
  height: 12px;
  background: linear-gradient(
    90deg,
    var(--color-surface),
    rgba(0, 0, 0, 0.05),
    var(--color-surface)
  );
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    opacity: 0.4;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0.4;
  }
}

/* ==========================================
   Sidebar
   ========================================== */

.sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--spacing-xl));
  height: fit-content;
}

.sidebar-section {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-icon {
  font-size: 1.25rem;
}

.sidebar-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.sidebar-title-simple {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
}

/* Featured List in Sidebar */
.featured-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.featured-item {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: var(--spacing-md);
}

.featured-thumb {
  width: 70px;
  height: 70px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.featured-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.featured-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-category {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-xs);
}

.featured-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-item:hover .featured-title {
  color: var(--color-primary);
}

/* Top Choices List */
.top-choices-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.top-choice-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.top-choice-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
}

.top-choice-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.top-choice-info {
  flex: 1;
  min-width: 0;
}

.top-choice-author {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-xs);
}

.top-choice-title {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.top-choice-item:hover .top-choice-title {
  color: var(--color-primary);
}

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

.footer {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-content p {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

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

@media (max-width: 1024px) {
  .content-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .sidebar-section {
    margin-bottom: 0;
  }
}

@media (max-width: 768px) {
  .hero-image {
    height: 300px;
  }

  .hero-title {
    font-size: var(--text-2xl);
  }

  .article-item {
    grid-template-columns: 1fr;
  }

  .article-thumbnail {
    width: 100%;
    height: 180px;
    order: -1;
  }

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

@media (max-width: 480px) {
  .nav-container {
    padding: 0 var(--spacing-md);
  }

  .main-content {
    padding: var(--spacing-md);
  }

  .hero-overlay {
    padding: var(--spacing-lg);
  }

  .hero-title {
    font-size: var(--text-xl);
  }
}