/*
Theme Name: Lumen
Theme URI: https://example.com/lumen
Author: Lumen
Author URI: https://example.com
Description: A neat, clean, and lightning-fast blog theme built for content sites. Zero bloat, no jQuery, fast Core Web Vitals, and an AdSense-ready layout with a substantial content-first design, clear navigation, and privacy/policy page support.
Version: 1.1.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: lumen
Tags: blog, one-column, two-columns, right-sidebar, custom-menu, custom-logo, featured-images, threaded-comments, translation-ready
*/

:root {
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --ink-faint: #666666;
  --paper: #ffffff;
  --wash: #f6f7f9;
  --line: #e6e8eb;
  --accent: #2b5c8a;
  --accent-hover: #1f4568;
  --radius: 8px;
  --wrap: 1180px;
  --content: 720px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-head: Georgia, "Times New Roman", serif;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.25; color: var(--ink); margin: 1.6em 0 0.5em; font-weight: 700; }
h1 { font-size: 2.1rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1.2em; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: #fff; padding: 10px 16px; z-index: 999;
}
.skip-link:focus { left: 8px; top: 8px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky; top: 0; z-index: 100;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 20px; max-width: var(--wrap); margin: 0 auto; }
.site-branding .site-title { font-family: var(--font-head); font-size: 1.5rem; margin: 0; font-weight: 700; }
.site-branding .site-title a { color: var(--ink); }
.site-branding .site-description { font-size: 0.85rem; color: var(--ink-faint); margin: 2px 0 0; }
.custom-logo { max-height: 48px; width: auto; }

/* Nav */
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px; }
.main-nav a { display: block; padding: 8px 12px; color: var(--ink-soft); font-size: 0.95rem; border-radius: var(--radius); }
.main-nav a:hover { background: var(--wash); color: var(--ink); text-decoration: none; }
.main-nav .current-menu-item > a { color: var(--accent); font-weight: 600; }

.menu-toggle { display: none; background: none; border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 12px; cursor: pointer; font-size: 0.95rem; }

/* Layout */
.site-main { padding: 40px 0 60px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 48px; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.content-grid.no-sidebar { grid-template-columns: minmax(0, var(--content)); justify-content: center; }

/* Post cards (archive) */
.post-card { padding: 0 0 32px; margin: 0 0 32px; border-bottom: 1px solid var(--line); }
.post-card:last-child { border-bottom: none; }
.post-card .entry-thumb { border-radius: var(--radius); overflow: hidden; margin-bottom: 16px; }
.post-card .entry-title { margin: 0 0 8px; font-size: 1.5rem; }
.post-card .entry-title a { color: var(--ink); }
.post-meta { font-size: 0.85rem; color: var(--ink-faint); margin-bottom: 12px; display: flex; flex-wrap: wrap; gap: 6px 14px; }
.post-meta a { color: var(--ink-faint); }
.entry-excerpt { color: var(--ink-soft); }
.read-more { font-weight: 600; font-size: 0.95rem; }

/* Single post */
.single-post .entry-header { margin-bottom: 24px; }
.single-post .entry-title { font-size: 2.4rem; margin: 0 0 12px; }
.single-post .featured-image { border-radius: var(--radius); overflow: hidden; margin: 0 0 28px; }
.entry-content { font-size: 1.08rem; }
.entry-content > * { max-width: var(--content); }
.entry-content img, .entry-content figure { max-width: 100%; border-radius: var(--radius); }
.entry-content figure { margin: 1.5em 0; }
.entry-content blockquote { border-left: 3px solid var(--accent); margin: 1.5em 0; padding: 4px 0 4px 20px; color: var(--ink-soft); font-style: italic; }
.entry-content ul, .entry-content ol { padding-left: 1.4em; }
.entry-content li { margin-bottom: 0.4em; }
.entry-content pre { background: var(--wash); padding: 16px; border-radius: var(--radius); overflow-x: auto; font-size: 0.9rem; }
.entry-content code { background: var(--wash); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.entry-content h2, .entry-content h3 { scroll-margin-top: 80px; }
.entry-content a { text-decoration: underline; text-underline-offset: 2px; }
.entry-content a:hover { text-decoration-thickness: 2px; }

.entry-footer { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 0.9rem; color: var(--ink-faint); }
.tag-links a { display: inline-block; background: var(--wash); padding: 4px 10px; border-radius: 20px; margin: 4px 6px 0 0; font-size: 0.85rem; color: var(--ink-soft); }
.tag-links a:hover { background: var(--line); text-decoration: none; }

/* Ad slots */
.ad-slot { margin: 32px auto; text-align: center; min-height: 90px; max-width: var(--content); }
.ad-slot .ad-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); margin-bottom: 6px; }
.ad-slot ins { display: block; }

/* Sidebar */
.sidebar .widget { margin-bottom: 36px; }
.sidebar .widget-title { font-size: 1.05rem; font-family: var(--font-body); font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; margin: 0 0 14px; padding-bottom: 8px; border-bottom: 2px solid var(--ink); }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li { padding: 7px 0; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
.sidebar li:last-child { border-bottom: none; }
.sidebar .sticky-widget { position: sticky; top: 90px; }

/* Author box */
.author-box { display: flex; gap: 16px; align-items: flex-start; background: var(--wash); border-radius: var(--radius); padding: 20px; margin: 40px 0; max-width: var(--content); }
.author-box img { border-radius: 50%; flex-shrink: 0; }
.author-box .author-name { font-weight: 700; margin: 0 0 6px; }
.author-box .author-bio { font-size: 0.92rem; color: var(--ink-soft); margin: 0; }

/* Related posts */
.related-posts { margin: 48px 0; max-width: var(--content); }
.related-posts h3 { margin-top: 0; }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.related-item a { color: var(--ink); font-weight: 600; }
.related-item .related-thumb { border-radius: var(--radius); overflow: hidden; margin-bottom: 8px; }

/* Comments */
.comments-area { max-width: var(--content); margin-top: 48px; }
.comment-list { list-style: none; padding: 0; }
.comment-body { padding: 16px 0; border-bottom: 1px solid var(--line); }
.comment-author { font-weight: 600; }
.comment-meta { font-size: 0.8rem; color: var(--ink-faint); }
.comment-form input[type="text"], .comment-form input[type="email"], .comment-form input[type="url"], .comment-form textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius); font: inherit; margin-top: 4px;
}
.comment-form textarea { min-height: 120px; }

/* Buttons */
.btn, .comment-form input[type="submit"], .wp-block-button__link {
  display: inline-block; background: var(--accent); color: #fff; padding: 10px 20px;
  border: none; border-radius: var(--radius); font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover, .comment-form input[type="submit"]:hover { background: var(--accent-hover); color: #fff; text-decoration: none; }

/* Pagination */
.pagination { display: flex; gap: 8px; flex-wrap: wrap; margin: 40px 0 0; justify-content: center; }
.pagination .page-numbers { padding: 8px 14px; border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink-soft); }
.pagination .page-numbers.current { background: var(--accent); color: #fff; border-color: var(--accent); }
.pagination a.page-numbers:hover { background: var(--wash); text-decoration: none; }

/* Footer */
.site-footer { background: var(--wash); border-top: 1px solid var(--line); padding: 40px 0 24px; margin-top: 40px; font-size: 0.9rem; }
.footer-widgets { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; margin-bottom: 28px; }
.footer-widgets .widget-title { font-size: 0.95rem; font-weight: 700; margin: 0 0 12px; }
.footer-widgets ul { list-style: none; padding: 0; margin: 0; }
.footer-widgets li { padding: 4px 0; }
.footer-bottom { text-align: center; color: var(--ink-faint); padding-top: 20px; border-top: 1px solid var(--line); }
.footer-nav ul { list-style: none; display: flex; gap: 18px; justify-content: center; padding: 0; margin: 0 0 10px; flex-wrap: wrap; }
.footer-nav a { color: var(--ink-soft); font-size: 0.88rem; }

/* Page title */
.page-header { max-width: var(--wrap); margin: 0 auto 32px; padding: 0 20px; }
.page-header .page-title { margin: 0; font-size: 2rem; }
.page-header .archive-description { color: var(--ink-soft); margin-top: 8px; }

/* Utilities & accessibility */
.screen-reader-text { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(1px,1px,1px,1px); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* Responsive */
@media (max-width: 900px) {
  .content-grid { grid-template-columns: 1fr; gap: 40px; }
  .sidebar .sticky-widget { position: static; }
}
@media (max-width: 640px) {
  body { font-size: 17px; }
  .single-post .entry-title { font-size: 1.8rem; }
  .related-grid { grid-template-columns: 1fr; }
  .menu-toggle { display: block; }
  .main-nav { display: none; width: 100%; }
  .main-nav.is-open { display: block; }
  .header-inner { flex-wrap: wrap; }
  .main-nav ul { flex-direction: column; width: 100%; }
  .author-box { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}