/*
Theme Name: Lumina
Theme URI: https://example.com/lumina
Author: Custom Theme
Author URI: https://example.com
Description: A clean, minimal blog and personal site theme with refined typography and generous whitespace.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: lumina
Tags: blog, personal, minimal, clean, sidebar, custom-header, footer-widgets
*/

/* =========================================
   CSS CUSTOM PROPERTIES
   ========================================= */
:root {
  --color-bg:         #0f1117;
  --color-surface:    #1a1d27;
  --color-text:       #e8e9ed;
  --color-muted:      #8b8fa8;
  --color-border:     #2a2d3a;
  --color-accent:     #7c9ef5;
  --color-accent-lt:  #1a2040;
  --color-link:       #7c9ef5;
  --color-link-hover: #a8bfff;

  --font-heading: Verdana, Geneva, Tahoma, sans-serif;
  --font-body:    Verdana, Geneva, Tahoma, sans-serif;
  --font-mono:    'Courier New', Courier, monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow:    0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.6);

  --transition: 0.2s ease;

  --container: 1140px;
  --content-w: 720px;
  --sidebar-w: 300px;
  --gap:       2rem;
}

/* =========================================
   RESET & BASE
   ========================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--color-link); text-decoration: underline; text-underline-offset: 3px; transition: color var(--transition); }
a:hover { color: var(--color-link-hover); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: 0.5em;
}
h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p { margin-bottom: 1.25rem; }
ul, ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
li { margin-bottom: 0.25rem; }

blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  background: var(--color-accent-lt);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-muted);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-border);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  background: #0a0c12;
  color: #c9d1e8;
  padding: 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

pre code { background: none; padding: 0; color: inherit; }

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
}

/* =========================================
   LAYOUT
   ========================================= */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-w);
  gap: var(--gap) 3rem;
  align-items: start;
  padding: 3rem 0 4rem;
}

@media (max-width: 900px) {
  .site-layout { grid-template-columns: 1fr; }
  .sidebar { order: 2; }
}

/* =========================================
   SITE HEADER
   ========================================= */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  max-width: var(--container);
  margin: 0 auto;
  gap: 1.5rem;
}

.site-branding { flex-shrink: 0; }

.site-title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text) !important;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-description {
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* =========================================
   NAVIGATION
   ========================================= */
.main-navigation { display: flex; align-items: center; gap: 0.25rem; }

.main-navigation ul {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 0.25rem;
}

.main-navigation a {
  display: block;
  padding: 0.45rem 0.85rem;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
  letter-spacing: 0.01em;
}

.main-navigation a:hover,
.main-navigation .current-menu-item > a,
.main-navigation .current_page_item > a {
  color: var(--color-text);
  background: var(--color-border);
}

/* Hamburger (mobile) */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-lg);
  color: var(--color-text);
}

@media (max-width: 680px) {
  .menu-toggle { display: block; }
  .main-navigation ul {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem;
    gap: 0.25rem;
    box-shadow: var(--shadow);
  }
  .main-navigation.toggled ul { display: flex; }
  .site-header { position: relative; }
}

/* =========================================
   POST LIST / ARCHIVE
   ========================================= */
.posts-list { display: flex; flex-direction: column; gap: 2.5rem; }

.post-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.post-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.post-card-thumb { aspect-ratio: 16/7; overflow: hidden; }
.post-card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.post-card:hover .post-card-thumb img { transform: scale(1.03); }

.post-card-body { padding: 1.75rem; }

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.75rem;
}

.post-meta a { color: var(--color-muted); }
.post-meta .category-tag {
  background: var(--color-accent-lt);
  color: var(--color-accent);
  padding: 0.15em 0.6em;
  border-radius: 100px;
  font-weight: 600;
  text-decoration: none;
}

.post-card-title {
  font-size: var(--text-2xl);
  margin-bottom: 0.6rem;
}
.post-card-title a { color: var(--color-text); text-decoration: none; }
.post-card-title a:hover { color: var(--color-accent); }

.post-excerpt { color: var(--color-muted); margin-bottom: 1.25rem; font-size: var(--text-sm); }

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.read-more:hover { color: var(--color-link-hover); gap: 0.65rem; }
.read-more::after { content: '→'; transition: margin-left var(--transition); }

/* =========================================
   SINGLE POST
   ========================================= */
.single-post-header { margin-bottom: 2.5rem; }

.single-post-header .post-meta { margin-bottom: 1rem; }

.single-post-title {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.post-featured-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2.5rem;
  aspect-ratio: 16/7;
}
.post-featured-image img { width: 100%; height: 100%; object-fit: cover; }

.post-content { font-size: var(--text-lg); line-height: 1.8; }
.post-content > * { max-width: 680px; }
.post-content img { border-radius: var(--radius); margin: 2rem auto; }
.post-content h2, .post-content h3 { margin-top: 2.5rem; }

.post-tags { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--color-border); }
.post-tags a {
  display: inline-block;
  margin: 0.25rem;
  padding: 0.3em 0.75em;
  background: var(--color-border);
  color: var(--color-muted);
  border-radius: 100px;
  font-size: var(--text-xs);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.post-tags a:hover { background: var(--color-accent-lt); color: var(--color-accent); }

/* Author Box */
.author-box {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-top: 3rem;
}
.author-box img { width: 72px; height: 72px; border-radius: 50%; flex-shrink: 0; }
.author-box h4 { font-size: var(--text-base); margin-bottom: 0.25rem; }
.author-box p { font-size: var(--text-sm); color: var(--color-muted); margin: 0; }

/* Post Navigation */
.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}
.nav-previous, .nav-next {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: var(--color-text);
  transition: box-shadow var(--transition);
}
.nav-previous:hover, .nav-next:hover { box-shadow: var(--shadow-sm); color: var(--color-text); }
.nav-next { text-align: right; }
.nav-label { font-size: var(--text-xs); color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.07em; display: block; margin-bottom: 0.35rem; }
.nav-title { font-family: var(--font-heading); font-size: var(--text-base); font-weight: 600; }

/* =========================================
   COMMENTS
   ========================================= */
.comments-area { margin-top: 3rem; }
.comments-title { font-size: var(--text-2xl); margin-bottom: 1.75rem; }

.comment-list { list-style: none; padding: 0; }
.comment {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
}
.comment-meta { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.comment-author img { width: 40px; height: 40px; border-radius: 50%; }
.comment-author .fn { font-weight: 600; font-size: var(--text-sm); }
.comment-metadata { font-size: var(--text-xs); color: var(--color-muted); }
.comment-content p { font-size: var(--text-sm); margin-bottom: 0; }

.comment-respond { margin-top: 2rem; }
.comment-respond .comment-reply-title { font-size: var(--text-xl); margin-bottom: 1.25rem; }

.comment-form label { display: block; font-size: var(--text-sm); font-weight: 500; margin-bottom: 0.4rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%;
  padding: 0.65rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: border-color var(--transition);
  margin-bottom: 1.25rem;
}
.comment-form input:focus,
.comment-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(45,106,79,0.1);
}
.comment-form textarea { min-height: 140px; resize: vertical; }

.comment-form input[type="submit"],
.wp-block-button__link,
button[type="submit"] {
  background: var(--color-accent);
  color: #fff;
  border: none;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: background var(--transition), transform var(--transition);
}
.comment-form input[type="submit"]:hover { background: var(--color-link-hover); transform: translateY(-1px); }

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

.widget {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.widget-title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.widget ul { list-style: none; padding: 0; margin: 0; }
.widget ul li { padding: 0.4rem 0; border-bottom: 1px solid var(--color-border); font-size: var(--text-sm); }
.widget ul li:last-child { border-bottom: none; }
.widget ul li a { color: var(--color-text); text-decoration: none; }
.widget ul li a:hover { color: var(--color-accent); }

.widget_search .search-form { display: flex; gap: 0.5rem; }
.widget_search input[type="search"] {
  flex: 1;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}
.widget_search input[type="search"]:focus { outline: none; border-color: var(--color-accent); }
.widget_search input[type="submit"] {
  background: var(--color-accent);
  color: #fff;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  cursor: pointer;
}

/* =========================================
   PAGINATION
   ========================================= */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition);
}
.page-numbers.current, .page-numbers:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

/* =========================================
   SITE FOOTER
   ========================================= */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
  padding: 4rem 0 2rem;
}

.footer-widgets {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-widget .widget-title {
  color: rgba(255,255,255,0.4);
  border-bottom-color: rgba(255,255,255,0.1);
}

.footer-widget a { color: rgba(255,255,255,0.7); text-decoration: none; }
.footer-widget a:hover { color: #fff; }
.footer-widget ul li { border-bottom-color: rgba(255,255,255,0.08); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}

.footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; }
.footer-bottom a:hover { color: #fff; }

/* =========================================
   UTILITY
   ========================================= */
.screen-reader-text {
  clip: rect(1px,1px,1px,1px);
  height: 1px; width: 1px;
  overflow: hidden;
  position: absolute;
}

.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: var(--text-xs); color: var(--color-muted); text-align: center; margin-top: 0.5rem; }

.alignleft { float: left; margin: 0 1.5rem 1rem 0; }
.alignright { float: right; margin: 0 0 1rem 1.5rem; }
.aligncenter { margin: 0 auto 1rem; text-align: center; }

.sticky { border-left: 3px solid var(--color-accent); padding-left: 1.25rem; }

/* =========================================
   404 / NO RESULTS
   ========================================= */
.error-404, .no-results {
  text-align: center;
  padding: 5rem 1rem;
}
.error-404 h1 { font-size: 6rem; color: var(--color-border); margin-bottom: 0; }
.error-404 h2 { font-size: var(--text-2xl); }

/* =========================================
   PAGE
   ========================================= */
.page-header { margin-bottom: 2.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--color-border); }
.page-title { font-size: var(--text-4xl); }

/* =========================================
   RESPONSIVE UTILITIES
   ========================================= */
@media (max-width: 640px) {
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-2xl); }
  .post-card-body { padding: 1.25rem; }
  .post-navigation { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}