/*
Theme Name: SEO小屋
Theme URI: https://example.com
Description: 极简SEO个人博客主题，纯手写HTML+CSS+原生JS，专注新手SEO实战干货分享。
Author: SEO小屋
Version: 1.6
License: GNU General Public License v2 or later
Text Domain: seohut
*/

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

:root {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-header: #111111;
  --color-text: #1a1a1a;
  --color-muted: #666666;
  --color-accent: #2563eb;
  --color-border: #e8e8e8;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --radius: 10px;
  --max-width: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.site-header {
  background: var(--color-header);
  color: #ffffff;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-brand {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #ffffff;
}

.site-brand:hover {
  opacity: 0.9;
}

.site-nav {
  display: flex;
  gap: 32px;
  list-style: none;
}

.site-nav a {
  color: #ffffff;
  font-size: 0.9375rem;
  transition: color 0.2s;
}

.site-nav a:hover {
  color: #60a5fa;
}

.site-nav a.is-active {
  color: #60a5fa;
}

.site-main {
  flex: 1;
  width: 100%;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.hero {
  text-align: center;
  margin-bottom: 48px;
  padding: 32px 16px;
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.8;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.post-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow 0.25s, transform 0.25s;
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.post-card:hover {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.post-card-cat {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-accent);
  background: rgba(37, 99, 235, 0.08);
  padding: 4px 10px;
  border-radius: 4px;
  align-self: flex-start;
}

.post-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.45;
}

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

.post-card-date {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.post-card-excerpt {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
}

.post-card-more {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
}

.post-card:hover .post-card-more {
  text-decoration: underline;
}

.no-posts {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--color-muted);
  padding: 48px 0;
}

.single-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 64px;
}

.single-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 24px;
}

.single-breadcrumb a {
  color: var(--color-muted);
  transition: color 0.2s;
}

.single-breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb-sep {
  color: var(--color-border);
  user-select: none;
}

.breadcrumb-current {
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.single-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.single-title {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.single-date {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.single-content {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
}

.single-content p {
  margin-bottom: 1.25em;
}

.single-content h2,
.single-content h3,
.single-content h4 {
  margin: 1.5em 0 0.75em;
  line-height: 1.4;
  font-weight: 600;
}

.single-content ul,
.single-content ol {
  margin: 0 0 1.25em 1.5em;
}

.single-content li {
  margin-bottom: 0.5em;
}

.single-content a {
  color: var(--color-accent);
  text-decoration: underline;
}

.single-content img {
  margin: 1.5em 0;
  border-radius: var(--radius);
}

.single-content blockquote {
  margin: 1.5em 0;
  padding: 16px 20px;
  border-left: 4px solid var(--color-accent);
  background: var(--color-surface);
  color: var(--color-muted);
}

.single-content .wp-block-table,
.single-content figure.wp-block-table {
  margin: 1.5em 0;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.single-content table {
  width: 100% !important;
  max-width: 100%;
  min-width: 0;
  border-collapse: collapse;
  table-layout: auto;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.single-content table th,
.single-content table td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
  vertical-align: top;
  word-break: break-word;
}

.single-content table thead th {
  background: var(--color-bg);
  font-weight: 600;
}

.single-content table tbody tr:nth-child(even) {
  background: rgba(0, 0, 0, 0.02);
}

/* 文章底部：版权 + 相关文章（seohut-core） */
.seohut-post-footer {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
}

.seohut-post-footer__copy {
  margin-bottom: 28px;
  font-size: 0.875rem;
  line-height: 1.7;
  text-align: center;
  color: var(--color-muted);
}

.seohut-post-footer__copy strong {
  color: var(--color-text);
  font-weight: 600;
}

.seohut-related__title {
  margin-bottom: 16px;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

.seohut-related__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.seohut-related__list a {
  display: block;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.55;
  text-decoration: none;
  transition: color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.seohut-related__list a:hover {
  color: var(--color-accent);
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: var(--shadow-card);
}

.post-nav {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 24px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.post-nav--both {
  justify-content: space-between;
}

.post-nav--only-prev {
  justify-content: flex-start;
}

.post-nav--only-next {
  justify-content: flex-end;
}

.post-nav-prev,
.post-nav-next {
  display: block;
  max-width: 48%;
  min-width: 0;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s;
}

.post-nav-prev {
  text-align: left;
}

.post-nav-next {
  text-align: right;
}

.post-nav-prev:hover,
.post-nav-next:hover {
  color: var(--color-accent);
}

.post-nav-prev:hover .post-nav-title,
.post-nav-next:hover .post-nav-title {
  color: var(--color-accent);
}

.post-nav-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.post-nav-title {
  display: block;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.2s;
}

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 28px 24px;
  text-align: center;
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--color-muted);
}

.footer-icp {
  margin: 8px 0 0;
  font-size: 0.8125rem;
}

.footer-icp a {
  color: var(--color-muted);
  text-decoration: none;
}

.footer-icp a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.archive-header {
  text-align: center;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.archive-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.archive-desc {
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto;
}

.pagination {
  margin-top: 48px;
  display: flex;
  justify-content: center;
}

.pagination .nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  font-size: 0.875rem;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  transition: color 0.2s, border-color 0.2s;
}

.pagination .page-numbers:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.pagination .page-numbers.current {
  color: #ffffff;
  background: var(--color-header);
  border-color: var(--color-header);
}

.pagination .page-numbers.dots {
  border: none;
  background: none;
  min-width: auto;
  padding: 0 4px;
}

.error-page {
  text-align: center;
  padding: 80px 16px 120px;
}

.error-code {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-header);
  line-height: 1;
  margin-bottom: 16px;
}

.error-msg {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 32px;
}

.error-back {
  display: inline-block;
  font-size: 0.9375rem;
  color: var(--color-accent);
  font-weight: 500;
  padding: 10px 24px;
  border: 1px solid var(--color-accent);
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
}

.error-back:hover {
  background: var(--color-accent);
  color: #ffffff;
}

@media (max-width: 992px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 0 16px;
    height: 56px;
  }

  .site-nav {
    gap: 20px;
  }

  .container {
    padding: 32px 16px 48px;
  }

  .hero {
    margin-bottom: 32px;
    padding: 16px 0;
  }

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

  .hero-desc {
    font-size: 0.9375rem;
  }

  .post-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .post-card {
    padding: 22px;
  }

  .single-wrap {
    padding: 32px 16px 48px;
  }

  .single-title {
    font-size: 1.375rem;
  }

  .single-breadcrumb {
    margin-bottom: 20px;
  }

  .breadcrumb-current {
    white-space: normal;
  }

  .single-content table {
    font-size: 0.875rem;
  }

  .single-content table th,
  .single-content table td {
    padding: 8px 10px;
  }

  .seohut-post-footer {
    margin-top: 32px;
    padding-top: 24px;
  }

  .seohut-related__list a {
    padding: 12px 14px;
    font-size: 0.875rem;
  }

  .post-nav {
    gap: 16px;
    margin-top: 32px;
    padding-top: 24px;
  }

  .post-nav-prev,
  .post-nav-next {
    max-width: 46%;
  }

  .post-nav-title {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

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

  .pagination {
    margin-top: 32px;
  }

  .error-page {
    padding: 48px 16px 80px;
  }

  .error-code {
    font-size: 3rem;
  }
}