/*
Theme Name: Univastro
Theme URI: https://univastro.net
Author: Marius Koch
Author URI: https://univastro.net
Description: A minimal dark, professional WordPress theme built for technical guides and tutorials. Clean, precise, trustworthy.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: univastro
Tags: dark, minimal, blog, technology, clean, responsive
*/

/* ============================================================
   UNIVASTRO DESIGN SYSTEM
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500;600&family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,600;1,9..144,400&display=swap');

/* ---- CSS Custom Properties ---- */
:root {
  /* Colors */
  --ua-bg:          #0f1117;
  --ua-bg-2:        #161b26;
  --ua-bg-3:        #1e2535;
  --ua-bg-4:        #252d3d;
  --ua-border:      #2a3347;
  --ua-border-light:#334060;

  --ua-text:        #e8eaf0;
  --ua-text-2:      #9aa3b8;
  --ua-text-3:      #6b7694;
  --ua-text-4:      #4a536b;

  --ua-accent:      #4f87ff;
  --ua-accent-2:    #3d6fe0;
  --ua-accent-glow: rgba(79, 135, 255, 0.15);
  --ua-accent-soft: rgba(79, 135, 255, 0.08);

  --ua-green:       #3ecf8e;
  --ua-green-soft:  rgba(62, 207, 142, 0.12);
  --ua-orange:      #f59e0b;
  --ua-orange-soft: rgba(245, 158, 11, 0.12);
  --ua-red:         #ef4444;
  --ua-red-soft:    rgba(239, 68, 68, 0.10);

  /* Typography */
  --font-sans:  'DM Sans', system-ui, sans-serif;
  --font-serif: 'Fraunces', Georgia, serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing scale */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* Radii */
  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  16px;
  --r-xl:  24px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.4), 0 2px 6px rgba(0,0,0,0.3);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.5), 0 4px 12px rgba(0,0,0,0.3);
  --shadow-accent: 0 0 0 1px var(--ua-accent), 0 4px 24px var(--ua-accent-glow);

  /* Layout */
  --max-w:         1200px;
  --max-w-content: 760px;
  --header-h:      64px;

  /* Transitions */
  --t-fast:   150ms ease;
  --t-normal: 250ms ease;
  --t-slow:   400ms ease;
}

/* ============================================================
   RESET & BASE
   ============================================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background: var(--ua-bg);
  color: var(--ua-text);
  line-height: 1.65;
  font-size: 1rem;
  font-weight: 400;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Selection */
::selection {
  background: var(--ua-accent);
  color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--ua-bg-2); }
::-webkit-scrollbar-thumb { background: var(--ua-border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ua-text-3); }

/* Focus ring */
:focus-visible {
  outline: 2px solid var(--ua-accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.25;
  color: var(--ua-text);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 700; }
h2 { font-size: clamp(1.35rem, 3vw, 2rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.15rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; color: var(--ua-text-2); }

p { margin-bottom: var(--space-5); color: var(--ua-text-2); line-height: 1.8; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--ua-accent);
  text-decoration: none;
  transition: color var(--t-fast), opacity var(--t-fast);
}
a:hover { color: #7aa8ff; }

strong, b { font-weight: 600; color: var(--ua-text); }
em, i { font-style: italic; }

blockquote {
  border-left: 3px solid var(--ua-accent);
  padding: var(--space-4) var(--space-6);
  background: var(--ua-accent-soft);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  margin: var(--space-8) 0;
  font-style: italic;
  color: var(--ua-text-2);
}
blockquote p { margin: 0; }

hr {
  border: none;
  border-top: 1px solid var(--ua-border);
  margin: var(--space-12) 0;
}

ul, ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
  color: var(--ua-text-2);
}
li { margin-bottom: var(--space-2); line-height: 1.75; }
li::marker { color: var(--ua-accent); }

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--r-md);
  display: block;
}

/* ============================================================
   CODE — Inline & Block
   ============================================================ */

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--ua-bg-3);
  color: #a8d8ff;
  padding: 2px 7px;
  border-radius: var(--r-sm);
  border: 1px solid var(--ua-border);
}

pre {
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-lg);
  padding: var(--space-6);
  overflow-x: auto;
  margin: var(--space-8) 0;
  position: relative;
}
pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.875rem;
  color: #cdd9f5;
  line-height: 1.7;
}

/* Copy button injected by JS */
.code-copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--ua-bg-4);
  border: 1px solid var(--ua-border-light);
  color: var(--ua-text-3);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all var(--t-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.code-copy-btn:hover {
  background: var(--ua-accent);
  border-color: var(--ua-accent);
  color: #fff;
}
.code-copy-btn.copied {
  background: var(--ua-green-soft);
  border-color: var(--ua-green);
  color: var(--ua-green);
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.container--narrow {
  max-width: var(--max-w-content);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ============================================================
   HEADER
   ============================================================ */

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(15, 17, 23, 0.88);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--ua-border);
  transition: border-color var(--t-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}

/* Logo */
.site-branding {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.site-branding .logo-mark {
  width: 34px;
  height: 34px;
  background: var(--ua-accent);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  color: #fff;
  letter-spacing: -0.05em;
  box-shadow: 0 0 16px var(--ua-accent-glow);
  transition: box-shadow var(--t-normal);
}
.site-branding:hover .logo-mark {
  box-shadow: 0 0 24px rgba(79,135,255,0.35);
}
.site-branding .site-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ua-text);
  letter-spacing: -0.03em;
}
.site-branding .site-tagline {
  font-size: 0.7rem;
  color: var(--ua-text-3);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* Primary Nav */
.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  padding: 0;
  margin: 0;
}
.primary-nav a {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: var(--ua-text-2);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--r-sm);
  transition: color var(--t-fast), background var(--t-fast);
  text-decoration: none;
}
.primary-nav a:hover,
.primary-nav .current_page_item a,
.primary-nav .current-menu-item a {
  color: var(--ua-text);
  background: var(--ua-bg-3);
}

/* Dropdown */
.primary-nav .menu-item-has-children { position: relative; }
.primary-nav .sub-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 0;
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  padding: var(--space-2);
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--t-normal), transform var(--t-normal), visibility var(--t-normal);
  z-index: 200;
}
.primary-nav .menu-item-has-children:hover .sub-menu,
.primary-nav .menu-item-has-children:focus-within .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.primary-nav .sub-menu a {
  display: block;
  padding: var(--space-2) var(--space-3);
  color: var(--ua-text-2);
  font-size: 0.875rem;
  border-radius: var(--r-sm);
}
.primary-nav .sub-menu a:hover { color: var(--ua-text); background: var(--ua-bg-3); }

/* Header search + actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-search-btn {
  background: none;
  border: 1px solid var(--ua-border);
  color: var(--ua-text-3);
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t-fast);
}
.header-search-btn:hover {
  border-color: var(--ua-accent);
  color: var(--ua-accent);
  background: var(--ua-accent-soft);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--ua-border);
  color: var(--ua-text-2);
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: all var(--t-fast);
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: all var(--t-normal);
  transform-origin: center;
}
.menu-toggle:hover { border-color: var(--ua-accent); color: var(--ua-accent); }
.menu-toggle.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================
   SEARCH OVERLAY
   ============================================================ */

#search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 18, 0.92);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-normal), visibility var(--t-normal);
}
#search-overlay.active {
  opacity: 1;
  visibility: visible;
}
.search-overlay-inner {
  width: 100%;
  max-width: 600px;
  padding: 0 var(--space-6);
  transform: translateY(-16px);
  transition: transform var(--t-normal);
}
#search-overlay.active .search-overlay-inner {
  transform: translateY(0);
}
.search-form-wrapper {
  position: relative;
}
.search-overlay-input {
  width: 100%;
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border-light);
  border-radius: var(--r-lg);
  color: var(--ua-text);
  font-family: var(--font-sans);
  font-size: 1.2rem;
  padding: var(--space-5) var(--space-6) var(--space-5) 56px;
  outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.search-overlay-input:focus {
  border-color: var(--ua-accent);
  box-shadow: var(--shadow-accent);
}
.search-overlay-icon {
  position: absolute;
  left: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  color: var(--ua-text-3);
  pointer-events: none;
}
.search-hint {
  margin-top: var(--space-4);
  text-align: center;
  font-size: 0.8rem;
  color: var(--ua-text-4);
  font-family: var(--font-mono);
}

/* ============================================================
   HERO — FRONT PAGE
   ============================================================ */

.site-hero {
  padding: var(--space-24) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

/* Subtle grid background */
.site-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--ua-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--ua-border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 30%, transparent 100%);
  pointer-events: none;
}

/* Accent glow */
.site-hero::after {
  content: '';
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(79,135,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--ua-accent-soft);
  border: 1px solid rgba(79,135,255,0.25);
  border-radius: 99px;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--ua-accent);
  margin-bottom: var(--space-6);
  letter-spacing: 0.03em;
}
.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--ua-green);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--ua-text);
  margin-bottom: var(--space-5);
}
.hero-title .accent {
  color: var(--ua-accent);
  font-style: italic;
  font-family: var(--font-serif);
  font-weight: 300;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--ua-text-2);
  line-height: 1.75;
  margin-bottom: var(--space-10);
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px 22px;
  border-radius: var(--r-md);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-normal);
  border: 1px solid transparent;
  letter-spacing: -0.01em;
}
.btn-primary {
  background: var(--ua-accent);
  color: #fff;
  border-color: var(--ua-accent);
  box-shadow: 0 4px 20px rgba(79,135,255,0.3);
}
.btn-primary:hover {
  background: var(--ua-accent-2);
  box-shadow: 0 6px 28px rgba(79,135,255,0.4);
  transform: translateY(-1px);
  color: #fff;
}
.btn-secondary {
  background: var(--ua-bg-3);
  color: var(--ua-text);
  border-color: var(--ua-border);
}
.btn-secondary:hover {
  background: var(--ua-bg-4);
  border-color: var(--ua-border-light);
  color: var(--ua-text);
  transform: translateY(-1px);
}

/* Hero stats */
.hero-stats {
  display: flex;
  gap: var(--space-8);
  justify-content: center;
  margin-top: var(--space-12);
  padding-top: var(--space-10);
  border-top: 1px solid var(--ua-border);
}
.stat-item { text-align: center; }
.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ua-text);
  font-family: var(--font-mono);
  display: block;
  letter-spacing: -0.03em;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--ua-text-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-top: 2px;
}

/* ============================================================
   CATEGORY CHIPS / FILTER BAR
   ============================================================ */

.category-bar {
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--ua-border);
}
.category-bar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.category-bar .label {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--ua-text-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  flex-shrink: 0;
  margin-right: var(--space-2);
}
.category-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 5px 14px;
  border-radius: 99px;
  border: 1px solid var(--ua-border);
  background: var(--ua-bg-2);
  color: var(--ua-text-2);
  font-size: 0.83rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--t-fast);
}
.category-chip:hover,
.category-chip.active {
  border-color: var(--ua-accent);
  background: var(--ua-accent-soft);
  color: var(--ua-accent);
}

/* ============================================================
   POST GRID — BLOG INDEX
   ============================================================ */

.posts-section {
  padding: var(--space-16) 0;
}
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  gap: var(--space-4);
  flex-wrap: wrap;
}
.section-title {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--ua-text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.section-link {
  font-size: 0.83rem;
  color: var(--ua-accent);
  font-weight: 500;
}

/* Featured post (first) */
.post-card--featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-xl);
  overflow: hidden;
  margin-bottom: var(--space-6);
  transition: border-color var(--t-normal), box-shadow var(--t-normal);
  text-decoration: none;
  color: inherit;
}
.post-card--featured:hover {
  border-color: var(--ua-border-light);
  box-shadow: var(--shadow-md);
}
.post-card--featured .card-image {
  background: var(--ua-bg-3);
  min-height: 280px;
  position: relative;
  overflow: hidden;
}
.post-card--featured .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: transform var(--t-slow);
}
.post-card--featured:hover .card-image img {
  transform: scale(1.03);
}
.post-card--featured .card-body {
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.post-card--featured .no-image {
  background: linear-gradient(135deg, var(--ua-bg-3) 0%, var(--ua-bg-4) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.post-card--featured .no-image-icon {
  font-family: var(--font-mono);
  font-size: 4rem;
  color: var(--ua-border-light);
  opacity: 0.5;
}

/* Post grid */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
}

/* Post card */
.post-card {
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--t-normal), box-shadow var(--t-normal), transform var(--t-normal);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  position: relative;
}
.post-card:hover {
  border-color: var(--ua-border-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.post-card .card-thumbnail {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--ua-bg-3);
}
.post-card .card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: transform var(--t-slow);
}
.post-card:hover .card-thumbnail img { transform: scale(1.04); }

/* No thumbnail fallback */
.card-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--ua-bg-3) 0%, var(--ua-bg-4) 100%);
  position: relative;
  overflow: hidden;
}
.card-thumb-placeholder::before {
  content: attr(data-letter);
  font-size: 5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--ua-border-light);
  opacity: 0.4;
  letter-spacing: -0.05em;
}

.post-card .card-body {
  padding: var(--space-5) var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Card meta */
.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}
.card-category {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ua-accent);
  font-weight: 500;
}
.card-date {
  font-size: 0.75rem;
  color: var(--ua-text-4);
}
.card-read-time {
  font-size: 0.75rem;
  color: var(--ua-text-4);
  margin-left: auto;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ua-text);
  line-height: 1.4;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}
.post-card:hover .card-title { color: #fff; }

.card-excerpt {
  font-size: 0.875rem;
  color: var(--ua-text-3);
  line-height: 1.65;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--ua-border);
}
.card-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.card-tag {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  color: var(--ua-text-4);
  background: var(--ua-bg-3);
  padding: 2px 8px;
  border-radius: 4px;
  text-decoration: none;
}
.card-tag:hover { color: var(--ua-accent); }
.card-arrow {
  color: var(--ua-text-4);
  transition: transform var(--t-fast), color var(--t-fast);
  flex-shrink: 0;
}
.post-card:hover .card-arrow {
  transform: translateX(4px);
  color: var(--ua-accent);
}

/* ============================================================
   SINGLE POST — ARTICLE
   ============================================================ */

.single-post-header {
  padding: var(--space-16) 0 var(--space-12);
  border-bottom: 1px solid var(--ua-border);
  margin-bottom: var(--space-12);
}

.post-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  font-size: 0.8rem;
  color: var(--ua-text-3);
}
.post-breadcrumb a { color: var(--ua-text-3); }
.post-breadcrumb a:hover { color: var(--ua-accent); }
.post-breadcrumb .sep { color: var(--ua-border-light); }

.post-category-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ua-accent);
  background: var(--ua-accent-soft);
  border: 1px solid rgba(79,135,255,0.2);
  padding: 4px 12px;
  border-radius: 99px;
  margin-bottom: var(--space-5);
}

.post-title {
  font-size: clamp(1.6rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--ua-text);
  margin-bottom: var(--space-5);
}

.post-description {
  font-size: 1.1rem;
  color: var(--ua-text-2);
  line-height: 1.75;
  max-width: 640px;
  margin-bottom: var(--space-8);
}

.post-meta-bar {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  padding-top: var(--space-6);
  border-top: 1px solid var(--ua-border);
}
.post-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--ua-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
  font-family: var(--font-mono);
  flex-shrink: 0;
}
.author-name { font-size: 0.875rem; font-weight: 600; color: var(--ua-text); }
.author-role { font-size: 0.75rem; color: var(--ua-text-3); }
.post-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8rem;
  color: var(--ua-text-3);
}
.post-meta-item svg { flex-shrink: 0; }

/* Progress bar */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--ua-accent), var(--ua-green));
  z-index: 9999;
  width: 0%;
  transition: width 50ms linear;
  box-shadow: 0 0 10px rgba(79,135,255,0.5);
}

/* Post layout with TOC */
.single-post-layout {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: var(--space-12);
  align-items: start;
  padding-bottom: var(--space-24);
}
.single-post-content { min-width: 0; }
.single-post-sidebar { position: sticky; top: calc(var(--header-h) + var(--space-6)); }

/* TOC Sidebar */
.toc-widget {
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-lg);
  padding: var(--space-5) var(--space-6);
}
.toc-title {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ua-text-3);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--ua-border);
}
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.toc-list a {
  display: block;
  font-size: 0.8rem;
  color: var(--ua-text-3);
  padding: 5px var(--space-3);
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  transition: all var(--t-fast);
  line-height: 1.4;
}
.toc-list a:hover,
.toc-list a.active {
  color: var(--ua-accent);
  border-left-color: var(--ua-accent);
  background: var(--ua-accent-soft);
}
.toc-list .toc-h3 a { padding-left: var(--space-6); font-size: 0.75rem; }

/* Article content styling */
.entry-content h2 {
  font-size: 1.6rem;
  margin-top: var(--space-12);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--ua-border);
  position: relative;
}
.entry-content h2::before {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--ua-accent);
}
.entry-content h3 {
  font-size: 1.2rem;
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  color: var(--ua-text);
}
.entry-content h4 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--ua-text-2);
}
.entry-content p {
  margin-bottom: var(--space-5);
  font-size: 1rem;
  line-height: 1.85;
}
.entry-content > ul, .entry-content > ol {
  margin-bottom: var(--space-5);
}
.entry-content a {
  color: var(--ua-accent);
  text-decoration: underline;
  text-decoration-color: rgba(79,135,255,0.4);
  text-underline-offset: 3px;
}
.entry-content a:hover {
  text-decoration-color: var(--ua-accent);
}
.entry-content img {
  margin: var(--space-8) 0;
  border: 1px solid var(--ua-border);
  box-shadow: var(--shadow-md);
}

/* Callout boxes */
.callout {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-radius: var(--r-md);
  margin: var(--space-8) 0;
  border: 1px solid;
}
.callout-icon { font-size: 1.2rem; flex-shrink: 0; margin-top: 2px; }
.callout-body p { margin: 0; font-size: 0.9rem; line-height: 1.65; }
.callout-title { font-weight: 600; font-size: 0.85rem; margin-bottom: var(--space-1); }

.callout--tip {
  background: var(--ua-green-soft);
  border-color: rgba(62, 207, 142, 0.25);
}
.callout--tip .callout-title, .callout--tip .callout-icon { color: var(--ua-green); }
.callout--tip .callout-body p { color: rgba(62,207,142,0.85); }

.callout--warning {
  background: var(--ua-orange-soft);
  border-color: rgba(245,158,11,0.25);
}
.callout--warning .callout-title, .callout--warning .callout-icon { color: var(--ua-orange); }
.callout--warning .callout-body p { color: rgba(245,158,11,0.85); }

.callout--danger {
  background: var(--ua-red-soft);
  border-color: rgba(239,68,68,0.2);
}
.callout--danger .callout-title, .callout--danger .callout-icon { color: var(--ua-red); }
.callout--danger .callout-body p { color: rgba(239,68,68,0.8); }

.callout--info {
  background: var(--ua-accent-soft);
  border-color: rgba(79,135,255,0.2);
}
.callout--info .callout-title, .callout--info .callout-icon { color: var(--ua-accent); }
.callout--info .callout-body p { color: rgba(79,135,255,0.85); }

/* Tables */
.entry-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-8) 0;
  font-size: 0.9rem;
}
.entry-content th {
  background: var(--ua-bg-3);
  color: var(--ua-text);
  font-weight: 600;
  padding: var(--space-3) var(--space-5);
  text-align: left;
  border: 1px solid var(--ua-border);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.entry-content td {
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--ua-border);
  color: var(--ua-text-2);
  vertical-align: top;
}
.entry-content tr:nth-child(even) td { background: var(--ua-bg-2); }

/* Post tags */
.post-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--ua-border);
}
.post-tag {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--ua-text-3);
  background: var(--ua-bg-3);
  border: 1px solid var(--ua-border);
  padding: 4px 12px;
  border-radius: 99px;
  text-decoration: none;
  transition: all var(--t-fast);
}
.post-tag:hover {
  color: var(--ua-accent);
  border-color: var(--ua-accent);
  background: var(--ua-accent-soft);
}
.post-tag::before { content: '# '; opacity: 0.5; }

/* ============================================================
   RELATED POSTS
   ============================================================ */

.related-posts {
  padding: var(--space-16) 0;
  border-top: 1px solid var(--ua-border);
}
.related-title {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ua-text-3);
  margin-bottom: var(--space-6);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

/* ============================================================
   PAGINATION
   ============================================================ */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-12) 0;
}
.pagination a,
.pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--t-fast);
  border: 1px solid var(--ua-border);
  background: var(--ua-bg-2);
  color: var(--ua-text-2);
}
.pagination a:hover { border-color: var(--ua-accent); color: var(--ua-accent); background: var(--ua-accent-soft); }
.pagination .current { background: var(--ua-accent); border-color: var(--ua-accent); color: #fff; }
.pagination .prev, .pagination .next { width: auto; padding: 0 var(--space-4); gap: var(--space-2); }

/* ============================================================
   SIDEBAR WIDGETS
   ============================================================ */

.widget-area {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.widget {
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-lg);
  padding: var(--space-5) var(--space-6);
}
.widget-title {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ua-text-3);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--ua-border);
}
.widget ul { list-style: none; padding: 0; margin: 0; }
.widget ul li {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--ua-border);
  font-size: 0.875rem;
}
.widget ul li:last-child { border-bottom: none; }
.widget ul a { color: var(--ua-text-2); text-decoration: none; }
.widget ul a:hover { color: var(--ua-accent); }

/* ============================================================
   COMMENTS
   ============================================================ */

.comments-area {
  padding: var(--space-16) 0;
  border-top: 1px solid var(--ua-border);
}
.comments-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-8);
  color: var(--ua-text);
}

.comment-list { list-style: none; padding: 0; margin: 0 0 var(--space-8); }
.comment-body {
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-lg);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-4);
}
.comment-author { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-4); }
.comment-author img {
  border-radius: 50%;
  width: 36px;
  height: 36px;
}
.comment-author .fn { font-weight: 600; font-size: 0.9rem; }
.comment-meta { font-size: 0.75rem; color: var(--ua-text-3); }

/* Comment form */
.comment-respond {
  background: var(--ua-bg-2);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-xl);
  padding: var(--space-8);
}
.comment-form label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ua-text-2);
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  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%;
  background: var(--ua-bg-3);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-md);
  color: var(--ua-text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: var(--space-3) var(--space-4);
  outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  margin-bottom: var(--space-5);
}
.comment-form input:focus,
.comment-form textarea:focus {
  border-color: var(--ua-accent);
  box-shadow: 0 0 0 3px var(--ua-accent-soft);
}
.comment-form textarea { min-height: 120px; resize: vertical; }
.comment-form input[type="submit"] {
  background: var(--ua-accent);
  border: none;
  border-radius: var(--r-md);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 24px;
  cursor: pointer;
  transition: all var(--t-fast);
}
.comment-form input[type="submit"]:hover { background: var(--ua-accent-2); transform: translateY(-1px); }

/* ============================================================
   404 PAGE
   ============================================================ */

.error-404 {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-24) 0;
}
.error-code {
  font-family: var(--font-mono);
  font-size: 8rem;
  font-weight: 700;
  color: var(--ua-border-light);
  line-height: 1;
  letter-spacing: -0.05em;
  margin-bottom: var(--space-4);
}
.error-title { font-size: 1.5rem; margin-bottom: var(--space-4); }
.error-desc { color: var(--ua-text-2); margin-bottom: var(--space-8); }

/* ============================================================
   FOOTER
   ============================================================ */

#site-footer {
  background: var(--ua-bg-2);
  border-top: 1px solid var(--ua-border);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand .site-desc {
  font-size: 0.875rem;
  color: var(--ua-text-3);
  line-height: 1.7;
  margin: var(--space-4) 0 var(--space-6);
  max-width: 260px;
}

.footer-col-title {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ua-text-3);
  margin-bottom: var(--space-4);
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--ua-text-2);
  text-decoration: none;
  transition: color var(--t-fast);
}
.footer-links a:hover { color: var(--ua-accent); }

/* Social links */
.social-links {
  display: flex;
  gap: var(--space-3);
}
.social-link {
  width: 36px;
  height: 36px;
  background: var(--ua-bg-3);
  border: 1px solid var(--ua-border);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ua-text-3);
  text-decoration: none;
  transition: all var(--t-fast);
  font-size: 0.85rem;
}
.social-link:hover {
  border-color: var(--ua-accent);
  color: var(--ua-accent);
  background: var(--ua-accent-soft);
}

/* Footer bottom */
.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--ua-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--ua-text-4);
  font-family: var(--font-mono);
}
.footer-legal {
  display: flex;
  gap: var(--space-5);
}
.footer-legal a {
  font-size: 0.8rem;
  color: var(--ua-text-4);
  text-decoration: none;
}
.footer-legal a:hover { color: var(--ua-text-2); }

/* ============================================================
   UTILITIES & ANIMATIONS
   ============================================================ */

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

/* Fade in on scroll */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.5s ease both;
}

/* Stagger children */
.stagger > *:nth-child(1) { animation-delay: 0ms; }
.stagger > *:nth-child(2) { animation-delay: 80ms; }
.stagger > *:nth-child(3) { animation-delay: 160ms; }
.stagger > *:nth-child(4) { animation-delay: 240ms; }
.stagger > *:nth-child(5) { animation-delay: 320ms; }
.stagger > *:nth-child(6) { animation-delay: 400ms; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .single-post-layout { grid-template-columns: 1fr; }
  .single-post-sidebar { display: none; }
}

@media (max-width: 768px) {
  :root { --header-h: 56px; }

  .primary-nav { display: none; }
  .primary-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--ua-bg-2);
    border-bottom: 1px solid var(--ua-border);
    padding: var(--space-4);
    gap: var(--space-1);
    z-index: 99;
    animation: fadeInUp 0.2s ease;
  }
  .primary-nav.open a { padding: var(--space-3) var(--space-4); font-size: 1rem; }
  .primary-nav.open .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: none;
    padding-left: var(--space-4);
  }

  .menu-toggle { display: flex; }

  .post-card--featured { grid-template-columns: 1fr; }
  .post-card--featured .card-image { min-height: 200px; }
  .post-card--featured .card-body { padding: var(--space-6); }

  .hero-stats { gap: var(--space-6); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .posts-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-stats { flex-wrap: wrap; gap: var(--space-5); }
}

/* ============================================================
   WORDPRESS CORE OVERRIDES
   ============================================================ */

.wp-block-image { margin: var(--space-8) 0; }
.wp-block-quote { @extend blockquote; }
.wp-block-code { @extend pre; }
.alignwide { margin-left: -40px; margin-right: -40px; }
.alignfull { margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); }
.alignleft { float: left; margin: 0 var(--space-6) var(--space-4) 0; }
.alignright { float: right; margin: 0 0 var(--space-4) var(--space-6); }
.aligncenter { margin-left: auto; margin-right: auto; text-align: center; }

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--space-3); }
.gallery-item img { border-radius: var(--r-md); border: 1px solid var(--ua-border); }

/* Screen reader text */
.screen-reader-text { @extend .sr-only; }