/* ===================================================================
   InsurAdvice — Premium Editorial Theme
   Design system: Inter, 8px spacing, CSS variables, dark mode
   =================================================================== */

/* ===== Design Tokens ===== */
:root {
  --bg: #ffffff;
  --bg-alt: #f7f7f8;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-2: #4a4a68;
  --text-3: #8a8aa0;
  --border: #e8e8ec;
  --border-light: #f0f0f4;
  --accent: #d4493f;
  --accent-hover: #c0392f;
  --accent-light: #fcebe9;
  --success: #1a936f;
  --warning: #f5a623;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --max-w: 1200px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.2s ease;
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 48px;
  --sp-6: 64px;
}

body.dark {
  --bg: #12121a;
  --bg-alt: #1a1a26;
  --bg-card: #1e1e2c;
  --text: #e4e4ec;
  --text-2: #b4b4c8;
  --text-3: #7a7a92;
  --border: #2a2a3a;
  --border-light: #22222e;
  --accent: #e85d54;
  --accent-hover: #d4493f;
  --accent-light: #2a1a18;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
}

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s, color 0.3s;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font-family: inherit; }

/* ===== Reading Progress Bar ===== */
#reading-progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0;
  background: var(--accent); z-index: 1000; transition: width 0.1s;
}

/* ===== Container ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--sp-3); }
.article-container { max-width: 760px; margin: 0 auto; padding: 0 var(--sp-3); }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg); border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition), background 0.3s;
}
.site-header.scrolled { box-shadow: var(--shadow-md); }
.header-container {
  max-width: var(--max-w); margin: 0 auto; padding: 0 var(--sp-3);
  display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.header-left { display: flex; align-items: center; gap: var(--sp-2); }
.site-logo {
  font-weight: 800; font-size: 1.2rem; letter-spacing: -0.03em; color: var(--text);
}
.main-nav { display: flex; gap: var(--sp-4); }
.main-nav a { font-size: 0.875rem; font-weight: 500; color: var(--text-2); position: relative; padding: 4px 0; }
.main-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--accent); transition: width var(--transition); }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
.main-nav a:hover, .main-nav a.active { color: var(--text); }
.header-right { display: flex; align-items: center; gap: var(--sp-1); }
.search-toggle, .theme-toggle {
  width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: var(--text-2); transition: all var(--transition);
}
.search-toggle:hover, .theme-toggle:hover { background: var(--bg-alt); color: var(--text); }
.theme-toggle .icon-moon { display: none; }
body.dark .theme-toggle .icon-sun { display: none; }
body.dark .theme-toggle .icon-moon { display: block; }
.mobile-menu-toggle { display: none; width: 36px; height: 36px; color: var(--text); }

/* Search Overlay */
.search-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5);
  z-index: 200; display: none; align-items: flex-start; justify-content: center; padding-top: 80px;
}
.search-overlay.active { display: flex; }
.search-container {
  width: 90%; max-width: 600px; background: var(--bg); border-radius: var(--radius);
  padding: var(--sp-3); display: flex; align-items: center; gap: var(--sp-2); box-shadow: var(--shadow-lg);
}
#search-input {
  flex: 1; border: none; outline: none; font-size: 1.1rem; background: transparent; color: var(--text);
}
.search-close { color: var(--text-3); padding: 4px; }
.search-close:hover { color: var(--text); }

/* ===== Hero Section ===== */
.hero-section { padding: var(--sp-5) var(--sp-3); max-width: var(--max-w); margin: 0 auto; }
.hero-article { position: relative; border-radius: var(--radius-lg); overflow: hidden; min-height: 480px; display: flex; align-items: flex-end; background: var(--bg-alt); }
.hero-image-wrap { position: absolute; inset: 0; display: block; }
.hero-image { width: 100%; height: 100%; background-size: cover; background-position: center; transition: transform 0.4s; }
.hero-image-wrap:hover .hero-image { transform: scale(1.03); }
.hero-image-placeholder { background: linear-gradient(135deg, #e8e8ec, #d8d8e0); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.3) 60%, transparent 100%); }
.hero-content { position: relative; z-index: 1; padding: var(--sp-5); max-width: 650px; }
.hero-category {
  display: inline-block; background: var(--accent); color: #fff; font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.06em; padding: 4px 10px; border-radius: 4px; margin-bottom: var(--sp-2);
}
.hero-title { font-size: 2.25rem; font-weight: 800; line-height: 1.15; letter-spacing: -0.03em; margin-bottom: var(--sp-2); }
.hero-title a { color: #fff; }
.hero-title a:hover { opacity: 0.9; }
.hero-excerpt { color: rgba(255,255,255,0.8); font-size: 1.05rem; line-height: 1.5; margin-bottom: var(--sp-2); }
.hero-meta { color: rgba(255,255,255,0.6); font-size: 0.85rem; display: flex; align-items: center; gap: var(--sp-2); margin-bottom: var(--sp-3); }
.hero-readmore {
  display: inline-block; padding: 10px 24px; background: rgba(255,255,255,0.15); color: #fff;
  border: 1px solid rgba(255,255,255,0.3); border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 600;
  transition: all var(--transition);
}
.hero-readmore:hover { background: var(--accent); border-color: var(--accent); }
.meta-dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: 0.5; display: inline-block; }

/* ===== Section Headers ===== */
.section-header { display: flex; align-items: center; gap: var(--sp-2); margin-bottom: var(--sp-4); }
.section-title { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; white-space: nowrap; }
.section-line { flex: 1; height: 1px; background: var(--border); }

/* ===== Article Cards ===== */
.secondary-featured { padding: var(--sp-4) 0; }
.secondary-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-3); }
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.article-card {
  background: var(--bg-card); border: 1px solid var(--border-light); border-radius: var(--radius);
  overflow: hidden; transition: transform var(--transition), box-shadow var(--transition);
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card-image-link { display: block; }
.card-image { width: 100%; height: 200px; background-size: cover; background-position: center; background-color: var(--bg-alt); }
.card-image-placeholder { background: linear-gradient(135deg, #e8e8ec, #f0f0f4); }
.card-body { padding: var(--sp-3); }
.card-category {
  display: inline-block; font-size: 0.68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--accent); margin-bottom: 8px;
}
.card-title { font-size: 1.05rem; font-weight: 700; line-height: 1.3; margin-bottom: 8px; letter-spacing: -0.015em; }
.card-title a:hover { color: var(--accent); }
.card-excerpt { font-size: 0.875rem; color: var(--text-2); line-height: 1.5; margin-bottom: var(--sp-2); }
.card-meta { font-size: 0.78rem; color: var(--text-3); display: flex; align-items: center; gap: 8px; }

/* ===== Content with Sidebar ===== */
.latest-news { padding: var(--sp-5) 0; }
.content-with-sidebar { display: grid; grid-template-columns: 1fr 320px; gap: var(--sp-5); align-items: start; }
.main-content { min-width: 0; }

/* ===== Sidebar ===== */
.sidebar { position: sticky; top: 80px; display: flex; flex-direction: column; gap: var(--sp-4); }
.sidebar-widget { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: var(--radius); padding: var(--sp-3); }
.sidebar-title { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--sp-2); padding-bottom: var(--sp-2); border-bottom: 2px solid var(--accent); }
.sidebar-posts { display: flex; flex-direction: column; gap: var(--sp-2); }
.sidebar-post { display: flex; flex-direction: column; gap: 2px; padding: 10px 0; border-bottom: 1px solid var(--border-light); }
.sidebar-post:last-child { border-bottom: none; }
.sidebar-cat { font-size: 0.68rem; font-weight: 600; color: var(--accent); text-transform: uppercase; }
.sidebar-post-title { font-size: 0.875rem; font-weight: 500; line-height: 1.3; color: var(--text); }
.sidebar-post:hover .sidebar-post-title { color: var(--accent); }
.sidebar-post time { font-size: 0.75rem; color: var(--text-3); }
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.sidebar-tag { font-size: 0.75rem; padding: 3px 10px; border: 1px solid var(--border); border-radius: 999px; color: var(--text-2); transition: all var(--transition); }
.sidebar-tag:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Categories Section ===== */
.categories-section { padding: var(--sp-5) 0; background: var(--bg-alt); }
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--sp-3); }
.category-tile {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: var(--sp-3);
  display: flex; flex-direction: column; gap: 4px; transition: all var(--transition);
}
.category-tile:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.category-name { font-size: 1rem; font-weight: 600; color: var(--text); }
.category-count { font-size: 0.8rem; color: var(--text-3); }

/* ===== Newsletter ===== */
.newsletter-section {
  background: var(--text); color: #fff; padding: var(--sp-5) 0; text-align: center;
}
.newsletter-container { max-width: 600px; margin: 0 auto; padding: 0 var(--sp-3); }
.newsletter-content h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.newsletter-content p { color: rgba(255,255,255,0.7); margin-bottom: var(--sp-3); }
.newsletter-form { display: flex; gap: var(--sp-1); }
.newsletter-form input {
  flex: 1; padding: 12px 16px; border: none; border-radius: var(--radius-sm); font-size: 0.95rem; background: rgba(255,255,255,0.1); color: #fff; outline: none;
}
.newsletter-form input::placeholder { color: rgba(255,255,255,0.5); }
.newsletter-form button {
  padding: 12px 24px; background: var(--accent); color: #fff; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem; transition: background var(--transition); white-space: nowrap;
}
.newsletter-form button:hover { background: var(--accent-hover); }

/* ===== Footer ===== */
.site-footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding: var(--sp-6) 0 var(--sp-4); }
.footer-container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--sp-3); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-5); padding-bottom: var(--sp-5); border-bottom: 1px solid var(--border); }
.footer-logo { font-size: 1.2rem; font-weight: 800; margin-bottom: 8px; color: var(--text); }
.footer-about p { font-size: 0.875rem; color: var(--text-3); line-height: 1.5; }
.footer-col h4 { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: var(--sp-2); color: var(--text); }
.footer-col a { display: block; font-size: 0.875rem; color: var(--text-3); padding: 4px 0; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: var(--sp-3); }
.footer-bottom p { font-size: 0.8rem; color: var(--text-3); }
.footer-social { display: flex; gap: var(--sp-2); }
.footer-social a { width: 32px; height: 32px; border-radius: 50%; background: var(--bg-card); display: flex; align-items: center; justify-content: center; color: var(--text-3); border: 1px solid var(--border); transition: all var(--transition); }
.footer-social a:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ===== Article Page ===== */
.article-page { padding: var(--sp-4) 0 var(--sp-6); }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-3); margin-bottom: var(--sp-3); flex-wrap: wrap; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--text-3); }
.breadcrumb-current { color: var(--text-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 300px; }
.article-header { margin-bottom: var(--sp-4); }
.article-category-badge {
  display: inline-block; font-size: 0.72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--accent); margin-bottom: var(--sp-2);
}
.article-title { font-size: 2.5rem; font-weight: 800; line-height: 1.1; letter-spacing: -0.035em; margin-bottom: var(--sp-2); }
.article-deck { font-size: 1.15rem; color: var(--text-2); line-height: 1.5; font-weight: 300; }
.article-meta-bar { margin-top: var(--sp-3); }
.meta-group { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-3); }
.meta-author { font-weight: 600; color: var(--text-2); }
.article-featured-image { margin: var(--sp-4) 0; border-radius: var(--radius-lg); overflow: hidden; }
.article-featured-image img { width: 100%; }

/* Article Body */
.article-body { font-size: 1.08rem; line-height: 1.85; color: var(--text); }
.article-body h2 { font-size: 1.6rem; font-weight: 700; margin: var(--sp-4) 0 var(--sp-2); letter-spacing: -0.02em; }
.article-body h3 { font-size: 1.3rem; font-weight: 600; margin: var(--sp-3) 0 var(--sp-1); }
.article-body p { margin-bottom: var(--sp-3); }
.article-body img { border-radius: var(--radius); margin: var(--sp-3) 0; }
.article-body blockquote { border-left: 3px solid var(--accent); padding-left: var(--sp-3); margin: var(--sp-3) 0; font-style: italic; color: var(--text-2); font-size: 1.1rem; }
.article-body ul, .article-body ol { margin: var(--sp-3) 0; padding-left: var(--sp-4); }
.article-body li { margin-bottom: 8px; }
.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; text-decoration-color: var(--border); }
.article-body a:hover { text-decoration-color: var(--accent); }
.article-body strong { font-weight: 600; }
.article-body hr { border: none; border-top: 1px solid var(--border); margin: var(--sp-5) 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: var(--sp-3) 0; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 10px; text-align: left; font-size: 0.9rem; }
.article-body th { background: var(--bg-alt); font-weight: 600; }
.article-body pre { background: var(--bg-alt); border-radius: var(--radius); padding: var(--sp-3); overflow-x: auto; margin: var(--sp-3) 0; font-size: 0.875rem; }
.article-body code { font-size: 0.875rem; background: var(--bg-alt); padding: 2px 6px; border-radius: 4px; }
.article-body pre code { background: none; padding: 0; }

/* Tags + Source */
.article-tags-section { margin-top: var(--sp-5); padding-top: var(--sp-3); border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.tags-label { font-size: 0.8rem; color: var(--text-3); font-weight: 600; }
.tag-link { font-size: 0.78rem; padding: 4px 12px; border: 1px solid var(--border); border-radius: 999px; color: var(--text-2); transition: all var(--transition); }
.tag-link:hover { border-color: var(--accent); color: var(--accent); }
.article-source-box { margin-top: var(--sp-3); padding: var(--sp-3); background: var(--bg-alt); border-radius: var(--radius); border-left: 3px solid var(--accent); }
.article-source-box p { font-size: 0.82rem; color: var(--text-3); margin-bottom: 4px; }
.article-source-box a { font-size: 0.875rem; color: var(--accent); word-break: break-all; }

/* Related */
.related-section { max-width: var(--max-w); margin: 0 auto; padding: var(--sp-5) var(--sp-3); }
.related-title { font-size: 1.3rem; font-weight: 700; margin-bottom: var(--sp-3); letter-spacing: -0.02em; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-3); }

/* ===== List Page ===== */
.list-page { padding: var(--sp-5) 0; }
.list-header { margin-bottom: var(--sp-5); }
.list-title { font-size: 2rem; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 8px; }
.list-description { font-size: 0.95rem; color: var(--text-3); }
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: var(--sp-5); }
.page-link {
  padding: 8px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 0.875rem; color: var(--text-2); transition: all var(--transition);
}
.page-link:hover { border-color: var(--accent); color: var(--accent); }
.page-link.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ===== Back to Top ===== */
#back-to-top {
  position: fixed; bottom: var(--sp-4); right: var(--sp-4); width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: #fff; display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: all var(--transition); z-index: 90; box-shadow: var(--shadow-md);
}
#back-to-top.visible { opacity: 1; pointer-events: auto; }
#back-to-top:hover { background: var(--accent-hover); transform: translateY(-2px); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .secondary-grid { grid-template-columns: repeat(2, 1fr); }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .content-with-sidebar { grid-template-columns: 1fr; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar-widget { flex: 1; min-width: 280px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .mobile-menu-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 64px; left: 0; right: 0; bottom: 0; background: var(--bg);
    flex-direction: column; padding: var(--sp-3); gap: 0; transform: translateX(-100%);
    transition: transform 0.3s; z-index: 99; border-top: 1px solid var(--border);
  }
  .main-nav.nav-open { transform: translateX(0); }
  .main-nav a { padding: var(--sp-2) 0; border-bottom: 1px solid var(--border-light); font-size: 1rem; }
  .main-nav a::after { display: none; }
  .hero-article { min-height: 360px; }
  .hero-content { padding: var(--sp-3); }
  .hero-title { font-size: 1.5rem; }
  .hero-excerpt { font-size: 0.95rem; }
  .secondary-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .article-title { font-size: 1.75rem; }
  .article-body { font-size: 1rem; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-3); }
  .footer-bottom { flex-direction: column; gap: var(--sp-2); }
  .newsletter-form { flex-direction: column; }
  .list-title { font-size: 1.5rem; }
  .section-title { font-size: 1.1rem; }
}
@media (max-width: 480px) {
  .hero-article { min-height: 320px; }
  .hero-title { font-size: 1.25rem; }
  .article-title { font-size: 1.5rem; }
  .card-image { height: 160px; }
}