@import url('fonts.css');
:root {
  --font-primary: 'Plus Jakarta Sans', sans-serif;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent-color: #0284c7;
  --accent-hover: #0369a1;
  --border-color: #e2e8f0;
  --placeholder-bg: rgba(2, 132, 199, 0.05);
  --placeholder-border: rgba(2, 132, 199, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
}

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Wireframe Placeholder Visual */
.wireframe-image-placeholder {
  width: 100%;
  height: 100%;
  min-height: 140px;
  background: var(--placeholder-bg);
  border: 2px dashed var(--placeholder-border);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  position: relative;
  overflow: hidden;
}

.wireframe-image-placeholder i {
  font-size: 2rem;
  opacity: 0.9;
}

/* Header Navigation */
.site-header {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #0284c7, #6366f1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

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

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-color);
}

.nav-link.back-to-hub {
  color: #0284c7;
  background: rgba(2, 132, 199, 0.08);
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  border: 1px solid rgba(2, 132, 199, 0.25);
}

.nav-link.back-to-hub:hover {
  background: var(--accent-color);
  color: #fff;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-color);
  border-radius: 2px;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
}

/* Main Content */
.main-content {
  padding: 2.5rem 0;
}

/* Featured Post */
.featured-section {
  margin-bottom: 3rem;
}

.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.featured-card:hover {
  border-color: var(--accent-color);
  box-shadow: 0 15px 30px -5px rgba(2, 132, 199, 0.12);
}

.featured-image-wrapper {
  position: relative;
  min-height: 280px;
}

.featured-image-wrapper .wireframe-image-placeholder {
  height: 100%;
}

.featured-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--accent-color);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

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

.post-meta {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
}

.featured-title {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.featured-excerpt {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
  background: var(--accent-color);
  color: #fff;
}

.btn-block:hover {
  background: var(--accent-hover);
  color: #fff;
}

/* Grid Layout */
.content-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2.5rem;
}

.section-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
  color: var(--text-primary);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--accent-color);
  border-radius: 2px;
}

/* Posts List */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.25rem;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-color);
  box-shadow: 0 10px 25px rgba(0,0,0,0.06);
}

.post-thumb {
  height: 120px;
}

.post-info {
  display: flex;
  flex-direction: column;
}

.post-tag {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: 0.25rem;
}

.post-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.35;
  color: var(--text-primary);
}

.post-title a:hover {
  color: var(--accent-color);
}

.post-excerpt {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.post-footer-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: auto;
}

/* Sidebar Widgets */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: 0 4px 15px rgba(0,0,0,0.03);
}

.widget-title {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

.widget-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.subscribe-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

.form-feedback {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: #16a34a;
  font-weight: 700;
}

.form-feedback.hidden {
  display: none;
}

.categories-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.categories-list a {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.35rem 0;
}

.categories-list a:hover {
  color: var(--accent-color);
}

.categories-list .count {
  font-size: 0.75rem;
  opacity: 0.7;
}

.mini-posts-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mini-post {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.mini-thumb {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
}

.mini-thumb .wireframe-image-placeholder {
  min-height: 50px;
  font-size: 0.7rem;
}

.mini-thumb .wireframe-image-placeholder i {
  font-size: 1rem;
}

.mini-title {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

.mini-title a:hover {
  color: var(--accent-color);
}

.mini-date {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

/* Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  margin-top: 4rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a:hover {
  color: var(--accent-color);
}

/* Responsive */
@media (max-width: 900px) {
  .featured-card {
    grid-template-columns: 1fr;
  }
  .content-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .post-card {
    grid-template-columns: 1fr;
  }
  .post-thumb {
    height: 160px;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    flex-direction: column;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
  }
  .nav-menu.show {
    display: flex;
  }
  .footer-container {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* Global Mobile Viewport Overflow Protection */
html, body {
  overflow-x: hidden;
  max-width: 100%;
}
img, svg, video, iframe, canvas {
  max-width: 100%;
  height: auto;
}