/**
 * 漫空星空 · 深色星空简约主题
 * 
 * @package 漫空星空 Starry
 * @author 漫空札记
 * @version 1.0.0
 * @link https://dzh9876.site
 */

/* ==================== 
   CSS Variables & Base
   ==================== */

:root {
  /* Color Palette - Deep Starry Night */
  --color-bg-primary: #0a0e27;
  --color-bg-secondary: #111633;
  --color-bg-tertiary: #1a1f3a;
  --color-bg-hover: #252d4a;
  
  --color-text-primary: #e8ecf1;
  --color-text-secondary: #a8b2c1;
  --color-text-tertiary: #7a8391;
  
  --color-accent-primary: #6eb3ff;
  --color-accent-secondary: #c084fc;
  --color-accent-light: #93c5fd;
  --color-accent-warm: #ffb84d;
  
  --color-border: #1f2442;
  --color-border-light: #2d3456;
  
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  --color-star-1: #fef08a;
  --color-star-2: #dbeafe;
  --color-star-3: #e9d5ff;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Typography */
  --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  --font-family-mono: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  
  --line-height-tight: 1.3;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Effects */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
  
  --shadow-glow-sm: 0 0 10px rgba(110, 179, 255, 0.25);
  --shadow-glow-md: 0 0 20px rgba(110, 179, 255, 0.35);
  --shadow-glow-lg: 0 0 30px rgba(192, 132, 252, 0.4);
  
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  --border-radius-xl: 1.5rem;
  --border-radius-full: 9999px;
}

/* ==================== 
   Base Elements
   ==================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  background-image: 
    radial-gradient(1px 1px at 1px 1px, var(--color-star-1), transparent),
    radial-gradient(1px 1px at 2px 3px, var(--color-star-2), transparent),
    radial-gradient(1px 1px at 3px 2px, var(--color-star-3), transparent),
    radial-gradient(1px 1px at 4px 5px, var(--color-star-1), transparent);
  background-size: 100px 100px, 150px 120px, 120px 150px, 200px 180px;
  background-position: 0 0, 30px 40px, 60px 20px, 90px 60px;
  background-attachment: fixed;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    ellipse at 50% 0%,
    rgba(192, 132, 252, 0.05) 0%,
    transparent 70%
  );
  pointer-events: none;
  z-index: 0;
}

/* ==================== 
   Typography
   ==================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5, h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-light);
  text-decoration: underline;
}

code {
  font-family: var(--font-family-mono);
  background-color: var(--color-bg-tertiary);
  color: var(--color-accent-light);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-md);
  font-size: 0.9em;
}

pre {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
}

pre code {
  background: none;
  color: var(--color-text-primary);
  padding: 0;
}

blockquote {
  border-left: 3px solid var(--color-accent-primary);
  padding-left: var(--spacing-lg);
  margin-left: 0;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
  font-style: italic;
}

/* ==================== 
   Buttons
   ==================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  
  font-family: var(--font-family-base);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  
  background-color: transparent;
  color: var(--color-text-primary);
  
  cursor: pointer;
  transition: all var(--transition-fast);
  
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  border-color: var(--color-accent-primary);
  background-color: var(--color-bg-hover);
  color: var(--color-accent-light);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-accent-primary);
  color: white;
  border-color: var(--color-accent-primary);
}

.btn-primary:hover {
  background-color: var(--color-accent-light);
  border-color: var(--color-accent-light);
  box-shadow: var(--shadow-glow-sm);
}

.btn-small {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-xs);
}

/* ==================== 
   Layout
   ==================== */

.content-col {
  flex: 1;
  min-width: 0;
}

/* ==================== 
   Hero Section
   ==================== */

.hero {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
  background: linear-gradient(
    135deg,
    rgba(110, 179, 255, 0.05) 0%,
    rgba(192, 132, 252, 0.05) 100%
  );
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(192, 132, 252, 0.1) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-title {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  background: linear-gradient(
    135deg,
    var(--color-text-primary) 0%,
    var(--color-accent-light) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
  position: relative;
  z-index: 1;
}

.hero-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.stat strong {
  font-size: var(--font-size-xl);
  color: var(--color-accent-primary);
  font-weight: var(--font-weight-bold);
}

.stat span {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
  position: relative;
  z-index: 1;
}

/* ==================== 
   Archive Hero
   ==================== */

.archive-hero {
  padding: var(--spacing-2xl) var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.hero-kicker {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.archive-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  color: var(--color-text-primary);
}

/* ==================== 
   Post List & Cards
   ==================== */

.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.post-card {
  background: linear-gradient(
    135deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-tertiary) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(110, 179, 255, 0.1),
    transparent
  );
  transition: left var(--transition-normal);
}

.post-card:hover {
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow-md);
  transform: translateY(-2px);
}

.post-card:hover::before {
  left: 100%;
}

.post-card-head {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-bg-hover);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-md);
  
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.meta-chip:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
  background-color: rgba(110, 179, 255, 0.1);
}

.post-card-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
}

.post-card-title a {
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

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

.post-card-excerpt {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.byline {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--color-accent-primary);
  font-weight: var(--font-weight-medium);
  transition: gap var(--transition-fast);
}

.read-more:hover {
  gap: var(--spacing-sm);
}

.arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.read-more:hover .arrow {
  transform: translateX(3px);
}

/* ==================== 
   Empty State
   ==================== */

.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.empty-state svg {
  color: var(--color-accent-primary);
  margin-bottom: var(--spacing-lg);
  opacity: 0.8;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.empty-state h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

.empty-state p {
  margin-bottom: var(--spacing-lg);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.empty-search {
  display: flex;
  gap: var(--spacing-sm);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.empty-search input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
}

.empty-search input:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow-sm);
}

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

/* ==================== 
   Pagination
   ==================== */

.page-navigator {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
  margin: var(--spacing-3xl) 0;
  flex-wrap: wrap;
}

.page-navigator a,
.page-navigator span {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.page-navigator a:hover {
  border-color: var(--color-accent-primary);
  background-color: var(--color-bg-hover);
  color: var(--color-accent-light);
}

.page-navigator .current {
  background-color: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  color: white;
  font-weight: var(--font-weight-semibold);
}

/* ==================== 
   Sidebar
   ==================== */

.widget {
  background: linear-gradient(
    135deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-tertiary) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.widget-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--color-accent-primary);
}

.widget ul {
  list-style: none;
}

.widget li {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.widget li:last-child {
  border-bottom: none;
}

.widget a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.widget a:hover {
  color: var(--color-accent-light);
  padding-left: var(--spacing-sm);
}

/* ==================== 
   Header & Footer
   ==================== */

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.logo {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-accent-light);
}

/* ==================== 
   Forms
   ==================== */

input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow-sm);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
}

/* ==================== 
   Comments
   ==================== */

.comments {
  margin-top: var(--spacing-3xl);
}

.comment-form {
  background: linear-gradient(
    135deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-tertiary) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.comment-form h3 {
  margin-bottom: var(--spacing-lg);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.comment-list {
  list-style: none;
}

.comment {
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(
    135deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-tertiary) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  border-left: 3px solid var(--color-accent-primary);
}

.comment-meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
}

.comment-author {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.comment-date {
  color: var(--color-text-tertiary);
}

.comment-content {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ==================== 
   Utilities
   ==================== */

.clearfix::after {
  content: '';
  display: table;
  clear: both;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==================== 
   Responsive Design
   ==================== */

@media (max-width: 768px) {
  :root {
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
    --font-size-xl: 1.125rem;
  }
  
  .hero {
    padding: var(--spacing-lg) var(--spacing-md);
    margin-bottom: var(--spacing-xl);
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .hero-actions .btn {
    width: 100%;
  }
  
  .post-card {
    padding: var(--spacing-lg);
  }
  
  .empty-search {
    flex-direction: column;
  }
  
  .empty-search input,
  .empty-search .btn {
    width: 100%;
  }
  
  .main-nav {
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xl: 1.5rem;
    --spacing-lg: 1rem;
    --font-size-2xl: 1.125rem;
  }
  
  .main-nav {
    width: 100%;
    justify-content: center;
  }
  
  #back-top {
    right: 16px;
    bottom: 16px;
  }
}

/* ==================== 
   Print Styles
   ==================== */

@media print {
  body::before {
    display: none;
  }
  
  .site-header,
  .site-footer,
  .side-col,
  .page-navigator {
    display: none;
  }
  
  .post-card {
    page-break-inside: avoid;
    border: 1px solid #ccc;
  }
}

/* ====================
   Page Layout (header.php / footer.php markup)
   ==================== */

.site-main {
  position: relative;
  z-index: 1;
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  min-height: 60vh;
}

#post-list {
  scroll-margin-top: 96px;
}

.wrap {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--spacing-xl);
  align-items: start;
}

.layout-wide {
  grid-template-columns: minmax(0, 1fr);
  max-width: 860px;
  margin: 0 auto;
}

.layout-wide .side-col {
  display: none;
}

.content-col {
  min-width: 0;
}

.side-col {
  min-width: 0;
  position: relative;
  z-index: 1;
}

/* ====================
   Header Brand & Nav
   ==================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
}

.site-brand {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md);
  min-width: 0;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  text-decoration: none;
  white-space: nowrap;
}

.site-logo:hover {
  color: var(--color-accent-light);
  text-decoration: none;
}

.logo-star {
  color: var(--color-accent-warm);
  filter: drop-shadow(0 0 6px rgba(255,184,77,0.6));
  animation: starPulse 3s ease-in-out infinite;
}

.logo-img {
  height: 30px;
  width: auto;
}

.logo-text {
  letter-spacing: 0.04em;
}

.site-slogan {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.main-nav {
  display: flex;
  gap: var(--spacing-lg);
}

.main-nav a {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
  padding: var(--spacing-xs) 0;
  position: relative;
  text-decoration: none;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
  transform: scaleX(0);
  transition: transform var(--transition-fast);
  border-radius: 2px;
}

.main-nav a:hover {
  color: var(--color-text-primary);
  text-decoration: none;
}

.main-nav a:hover::after,
.main-nav a.current::after {
  transform: scaleX(1);
}

.main-nav a.current {
  color: var(--color-accent-light);
}

.site-search {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-full);
  padding: 3px 4px 3px var(--spacing-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.site-search:focus-within {
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow-sm);
}

.site-search input {
  width: 130px;
  border: none;
  background: transparent;
  padding: var(--spacing-xs) 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
}

.site-search input:focus {
  outline: none;
  border: none;
  box-shadow: none;
}

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

.site-search button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: var(--border-radius-full);
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.site-search button:hover {
  background: var(--color-bg-hover);
  color: var(--color-accent-light);
}

/* ====================
   Star Canvas & Nebula
   ==================== */

#stars-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.nebula {
  position: fixed;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

.nebula-a {
  top: -160px;
  left: -120px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(110, 179, 255, 0.4), transparent 70%);
  animation: nebulaDriftA 26s ease-in-out infinite alternate;
}

.nebula-b {
  bottom: -180px;
  right: -140px;
  width: 560px;
  height: 560px;
  background: radial-gradient(circle, rgba(192, 132, 252, 0.36), transparent 70%);
  animation: nebulaDriftB 32s ease-in-out infinite alternate;
}

@keyframes nebulaDriftA {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(90px, 60px) scale(1.12); }
}

@keyframes nebulaDriftB {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-80px, -50px) scale(1.08); }
}

body.motion-off .nebula,
body.motion-off .logo-star {
  animation: none !important;
}

@keyframes starPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.85; }
}

/* ====================
   Footer
   ==================== */

.site-footer {
  position: relative;
  z-index: 1;
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-3xl);
}

.footer-inner {
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
}

.footer-brand a {
  color: var(--color-text-primary);
}

.footer-brand a:hover {
  color: var(--color-accent-light);
  text-decoration: none;
}

.footer-star {
  color: var(--color-accent-warm);
}

.footer-dot {
  color: var(--color-text-tertiary);
}

.footer-beian {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-xs);
}

.footer-beian a {
  color: var(--color-text-tertiary);
}

.footer-beian a:hover {
  color: var(--color-accent-light);
}

.beian-sep {
  margin: 0 var(--spacing-sm);
  opacity: 0.5;
}

.police-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-theme {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  opacity: 0.7;
  margin: 0;
}

#back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-border-light);
  background: rgba(17, 22, 51, 0.92);
  color: var(--color-text-secondary);
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-normal);
  z-index: 90;
}

#back-top.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

#back-top:hover {
  color: var(--color-accent-light);
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow-sm);
}

/* ====================
   Sidebar Widgets
   ==================== */

.widget-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.widget-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-sm);
}

.widget-list li a {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.widget-comments li {
  display: block;
  padding: var(--spacing-sm) 0;
}

.side-comment-author {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 2px;
  white-space: normal;
}

.side-comment-text {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  line-height: 1.5;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: var(--color-bg-hover);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.tag-pill:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-light);
  background: rgba(110, 179, 255, 0.12);
  text-decoration: none;
}

.tag-num {
  font-size: 10px;
  color: var(--color-text-tertiary);
}

/* ====================
   Single Post / Page
   ==================== */

.single-post {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-2xl);
}

.single-head {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.single-title {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin-bottom: var(--spacing-md);
}

.content-single {
  min-width: 0;
}

.single-byline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.post-content {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-primary);
  overflow-wrap: break-word;
}

.post-content p {
  color: var(--color-text-primary);
  line-height: 1.9;
  margin-bottom: 1.2em;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  margin: 1.8em 0 0.7em;
}

.post-content h2 {
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--color-border);
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius-md);
  margin: 1em 0;
  display: block;
}

.post-content a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-content ul,
.post-content ol {
  padding-left: 1.5em;
  margin-bottom: 1.2em;
  color: var(--color-text-secondary);
}

.post-content li {
  margin-bottom: 0.4em;
  line-height: 1.8;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.2em;
  display: block;
  overflow-x: auto;
}

.post-content th,
.post-content td {
  border: 1px solid var(--color-border);
  padding: 0.6em 0.8em;
  text-align: left;
}

.post-content th {
  background: var(--color-bg-hover);
}

.post-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2em 0;
}

.post-content iframe,
.post-content video {
  max-width: 100%;
}

.single-foot {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.single-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md);
}

.tags-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.block-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-md);
  border-left: 3px solid var(--color-accent-primary);
}

.related-posts {
  margin-top: var(--spacing-2xl);
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.related-list li {
  padding: 0;
  border: none;
}

.related-list a {
  display: block;
  height: 100%;
  padding: var(--spacing-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  transition: all var(--transition-fast);
  white-space: normal;
}

.related-list a:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-light);
  text-decoration: none;
}

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.post-nav-item {
  padding: var(--spacing-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  transition: border-color var(--transition-fast);
}

.post-nav-item:hover {
  border-color: var(--color-accent-primary);
}

.post-nav-item a {
  display: block;
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.post-nav-item a:hover {
  color: var(--color-accent-light);
  text-decoration: none;
}

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

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

.nav-label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ====================
   Comments
   ==================== */

.comments-block {
  margin-top: var(--spacing-3xl);
}

.comment-body {
  list-style: none;
  padding: 0;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(
    135deg,
    var(--color-bg-secondary) 0%,
    var(--color-bg-tertiary) 100%
  );
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent-primary);
  border-radius: var(--border-radius-lg);
}

.comment-body.comment-by-author {
  border-left-color: var(--color-accent-warm);
}

.comment-inner {
  padding: var(--spacing-lg);
}

.comment-head {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.comment-avatar img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--color-border-light);
  display: block;
}

.comment-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.comment-author {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  font-style: normal;
}

.comment-time {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.comment-time:hover {
  color: var(--color-accent-light);
}

.comment-awaiting {
  font-style: normal;
  font-size: var(--font-size-xs);
  color: var(--color-warning);
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-radius: var(--border-radius-full);
  padding: 2px 8px;
}

.comment-reply {
  margin-left: auto;
  font-size: var(--font-size-sm);
}

.comment-content {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.comment-content p {
  margin-bottom: 0.8em;
  color: var(--color-text-secondary);
}

.comment-content p:last-child {
  margin-bottom: 0;
}

.comment-children {
  margin-top: var(--spacing-md);
  padding-left: var(--spacing-xl);
  border-left: 1px dashed var(--color-border-light);
}

.comment-child > .comment-inner {
  position: relative;
}

.logged-in-as {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--spacing-lg);
}

.comments-closed {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  padding: var(--spacing-md);
  border: 1px dashed var(--color-border-light);
  border-radius: var(--border-radius-md);
  text-align: center;
}

.cancel-comment-reply {
  margin-bottom: var(--spacing-sm);
  text-align: right;
}

.respond {
  margin-top: var(--spacing-2xl);
}

.respond-title {
  margin-bottom: var(--spacing-lg);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.form-field {
  margin-bottom: var(--spacing-md);
}

.form-field input,
.form-field textarea {
  width: 100%;
}

label.required::after {
  content: ' *';
  color: var(--color-error);
}

.form-actions {
  margin-bottom: 0;
}

/* ====================
   404 Page
   ==================== */

.error-page {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.error-code {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  background: linear-gradient(
    135deg,
    var(--color-text-primary) 0%,
    var(--color-accent-light) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
}

.error-star {
  color: var(--color-accent-warm);
  -webkit-text-fill-color: currentColor;
  animation: starPulse 2.5s ease-in-out infinite;
}

.error-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-md);
}

.error-desc {
  color: var(--color-text-secondary);
  max-width: 420px;
  margin: 0 auto var(--spacing-2xl);
}

.error-search {
  display: flex;
  gap: var(--spacing-sm);
  max-width: 400px;
  margin: 0 auto var(--spacing-lg);
}

.error-search input {
  flex: 1;
}

/* ====================
   Responsive Additions
   ==================== */

@media (max-width: 960px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .side-col {
    width: 100%;
  }

  .layout-wide {
    max-width: none;
  }
}

@media (max-width: 768px) {
  .wrap {
    padding: 0 var(--spacing-md);
  }

  .site-header {
    padding: var(--spacing-sm) 0;
  }

  .site-main {
    padding-top: var(--spacing-lg);
  }

  .header-inner {
    flex-wrap: wrap;
    justify-content: center;
    row-gap: var(--spacing-sm);
  }

  .site-slogan {
    display: none;
  }

  .header-right {
    width: 100%;
    justify-content: center;
    gap: var(--spacing-md);
  }

  .site-search {
    display: none;
  }

  .archive-hero {
    padding: var(--spacing-lg) var(--spacing-md);
    margin-bottom: var(--spacing-xl);
  }

  .single-post {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .single-head {
    text-align: center;
  }

  .single-byline {
    justify-content: center;
  }

  .post-nav {
    grid-template-columns: 1fr;
  }

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

  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .comment-children {
    padding-left: var(--spacing-md);
  }

  .error-search {
    flex-direction: column;
  }
}