/*
======================================================
  MES Design Philosophy (MES設計理念) - Premium Stylesheet
  Inspired by LeanyLabs Blog Layout
  Author: Antigravity AI
======================================================
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  --bg-primary: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent-blue: #2563eb;
  --accent-hover: #1d4ed8;
  --border-color: #e2e8f0;
  --pill-bg: #f1f5f9;
  --pill-text: #475569;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout Containers */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Title section */
.blog-header {
  padding: 80px 0 40px;
  text-align: center;
}

.blog-header h1 {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text-primary);
  margin-bottom: 24px;
  position: relative;
  display: inline-block;
}

.blog-header h1::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--accent-blue);
  border-radius: 2px;
}

/* Search bar styling - premium & clean */
.search-container {
  max-width: 640px;
  margin: 0 auto 60px;
  position: relative;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 20px;
  color: var(--text-muted);
  font-size: 1.3rem;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 16px 20px 16px 52px;
  border: 1px solid var(--border-color);
  border-radius: 50px;
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-size: 1.05rem;
  font-family: var(--font-family);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  outline: none;
}

.search-input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15), var(--shadow-md);
}

.search-input::placeholder {
  color: var(--text-muted);
}

/* Post Cards Stream */
.cards-stream {
  display: flex;
  flex-direction: column;
  gap: 36px;
  padding-bottom: 100px;
}

/* LeanyLabs Style card - Row based */
.post-card {
  display: flex;
  background-color: var(--bg-card);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
  color: inherit;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.3);
}

/* Card Left: Thumbnail Image */
.card-image-wrapper {
  flex: 0 0 280px;
  height: 180px;
  overflow: hidden;
  position: relative;
}

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

.post-card:hover .card-image {
  transform: scale(1.05);
}

/* Card Right: Content details */
.card-content {
  flex: 1;
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Top row: tags and reading duration */
.card-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.tag-list {
  display: flex;
  gap: 8px;
}

.tag-pill {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  background-color: var(--pill-bg);
  color: var(--pill-text);
  border-radius: 20px;
  text-transform: lowercase;
  letter-spacing: 0.3px;
}

.read-duration {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Title & summary */
.card-title {
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 10px;
  transition: var(--transition-smooth);
}

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

.card-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Empty State Styling */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  background-color: var(--bg-card);
  border-radius: 12px;
  border: 1px dashed var(--border-color);
  display: none;
}

.empty-icon {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.empty-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ======================================================
  Full Article Page Styles
====================================================== */
.back-btn-wrapper {
  padding: 40px 0 20px;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.btn-back:hover {
  color: var(--accent-blue);
  transform: translateX(-4px);
}

.article-header {
  padding: 20px 0 40px;
}

.article-meta-tags {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.article-category {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-blue);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.article-title {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.article-author-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}

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

.author-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Article content layout */
.article-cover-wrapper {
  margin-bottom: 50px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.article-cover {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
}

.article-body {
  max-width: 780px;
  margin: 0 auto;
  padding-bottom: 100px;
  font-size: 1.15rem;
  line-height: 1.8;
  color: #1e293b;
}

.article-body p {
  margin-bottom: 28px;
}

.article-body h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 50px 0 20px;
  line-height: 1.35;
  position: relative;
  padding-left: 16px;
}

.article-body h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 5px;
  background-color: var(--accent-blue);
  border-radius: 3px;
}

.article-body h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 16px;
}

.article-body blockquote {
  margin: 36px 0;
  padding: 24px 32px;
  background-color: #f8fafc;
  border-left: 4px solid var(--accent-blue);
  border-radius: 0 12px 12px 0;
  font-style: italic;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body ul, .article-body ol {
  margin: 0 0 28px 24px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body li strong {
  color: var(--text-primary);
}

/* Responsive media queries */
@media (max-width: 900px) {
  .post-card {
    flex-direction: column;
  }
  
  .card-image-wrapper {
    flex: 0 0 auto;
    width: 100%;
    height: 200px;
  }
  
  .card-content {
    padding: 24px;
  }
  
  .blog-header {
    padding: 60px 0 30px;
  }
  
  .blog-header h1 {
    font-size: 2.5rem;
  }
  
  .article-title {
    font-size: 2.2rem;
  }
}

@media (max-width: 600px) {
  .blog-header h1 {
    font-size: 2rem;
  }
  
  .search-container {
    margin-bottom: 40px;
  }
  
  .search-input {
    padding: 14px 16px 14px 44px;
    font-size: 0.95rem;
  }
  
  .search-icon {
    left: 16px;
    font-size: 1.15rem;
  }
  
  .card-title {
    font-size: 1.25rem;
  }
  
  .article-title {
    font-size: 1.8rem;
  }
}

/* Language Switcher Styling */
.lang-switcher-wrapper {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  margin-bottom: -20px;
}

.lang-btn {
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.lang-btn:hover {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  background-color: #eff6ff;
}

.lang-btn.active {
  color: #ffffff;
  background-color: var(--accent-blue);
  border-color: var(--accent-blue);
}