/* ============================================
   Claude Theme for Hexo
   Inspired by Claude's official design language
   Colors: Morandi / low-saturation palette
   Fonts: Ubuntu Mono (display) | PT Serif (body) | Inter (UI)
   Radius: 12px | Spacing: 4px base
   ============================================ */

/* ===== CSS Variables ===== */
:root {
  --bg: #F4F1EA;
  --bg-card: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --text-primary: #2C2C2C;
  --text-secondary: #6B6B6B;
  --text-muted: #9A9A9A;
  --accent: #D97757;
  --accent-hover: #C86545;
  --accent-light: #F5E6DE;
  --accent-subtle: rgba(217, 119, 87, 0.08);
  --border: #E5E0D8;
  --border-light: #EFECE6;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-hover: 0 12px 36px rgba(0,0,0,0.1);

  /* Fonts */
  --font-display: 'Xiaolai Mono SC', 'Kose', 'Courier New', monospace;
  --font-body: 'Xiaolai Mono SC', 'Kose', 'Courier New', monospace;
  --font-ui: 'Xiaolai Mono SC', 'Kose', 'Courier New', monospace;
  --font-code: 'Fantasque Sans Mono', 'Courier New', monospace;

  /* Spacing (4px base) */
  --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;

  /* Radii */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;

  /* Transitions */
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ===== Dark Mode ===== */
[data-theme="dark"] {
  --bg: #1C1C1E;
  --bg-card: #2C2C2E;
  --bg-elevated: #3A3A3C;
  --text-primary: #F5F5F0;
  --text-secondary: #B0B0A8;
  --text-muted: #7C7C7A;
  --accent: #E88B6A;
  --accent-hover: #D97757;
  --accent-light: #3A2A24;
  --accent-subtle: rgba(232, 139, 106, 0.1);
  --border: #3A3A3C;
  --border-light: #333336;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-hover: 0 12px 36px rgba(0,0,0,0.4);
}

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

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

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
  transition: background var(--transition);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

/* ===== Cursor Glow ===== */
.cursor-glow {
  position: fixed;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  opacity: 0.06;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  will-change: transform, left, top;
}

@media (max-width: 768px) {
  .cursor-glow {
    display: none;
  }
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition-slow), color var(--transition-slow);
  font-weight: 400;
}

/* ===== Noise Texture ===== */
.noise-overlay {
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23noise)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

/* ===== Container ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Content width limit for text readability */
.post-article__body,
.page-article__body,
.page-header {
  max-width: 720px;
}

.post-article__header,
.post-article__tags,
.post-article__back,
.post-article__nav {
  max-width: 720px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
}

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

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

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

ul, ol {
  padding-left: var(--space-5);
}

blockquote {
  border-left: 3px solid var(--accent);
  margin: var(--space-6) 0;
  padding: var(--space-4) var(--space-6);
  color: var(--text-secondary);
  font-style: italic;
  background: var(--accent-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

code {
  font-family: var(--font-code);
  font-size: 0.85em;
  background: var(--border-light);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  overflow-x: auto;
  margin: var(--space-6) 0;
  font-size: 0.85rem;
}

pre code {
  font-family: var(--font-code);
  background: none;
  padding: 0;
  border-radius: 0;
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
}

hr {
  border: none;
  position: relative;
  height: 2px;
  margin: var(--space-8) 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='4'%3E%3Cdefs%3E%3Cfilter id='hr'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.06' numOctaves='3'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2'/%3E%3C/filter%3E%3C/defs%3E%3Cline x1='0' y1='2' x2='400' y2='2' stroke='%23D8D4CC' stroke-width='1.5' filter='url(%23hr)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

[data-theme="dark"] hr {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='4'%3E%3Cdefs%3E%3Cfilter id='hrd'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.06' numOctaves='3'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2'/%3E%3C/filter%3E%3C/defs%3E%3Cline x1='0' y1='2' x2='400' y2='2' stroke='%233A3A3C' stroke-width='1.5' filter='url(%23hrd)'/%3E%3C/svg%3E");
}

/* ===== Hand-drawn SVG filter overlay ===== */
.handdrawn {
  position: relative;
  isolation: isolate;
}

.handdrawn::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0.15;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='hd'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.03' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='3'/%3E%3C/filter%3E%3Crect width='200' height='200' fill='none' stroke='%232C2C2C' stroke-width='2' filter='url(%23hd)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.55rem 1.3rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 1.5px solid transparent;
  line-height: 1.4;
  position: relative;
}

.btn::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius) + 2px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='60'%3E%3Cfilter id='hd-btn'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.05' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3Crect width='200' height='60' fill='none' stroke='%232C2C2C' stroke-width='2' filter='url(%23hd-btn)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.btn--primary::before {
  opacity: 0.2;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='60'%3E%3Cfilter id='hd-btp'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.05' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3Crect width='200' height='60' fill='none' stroke='white' stroke-width='2' filter='url(%23hd-btp)'/%3E%3C/svg%3E");
}

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

.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(217, 119, 87, 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn--outline:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(217, 119, 87, 0.2);
}

.btn svg {
  transition: transform var(--transition);
}

.btn:hover svg {
  transform: translateX(3px);
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(244, 241, 234, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1.5px solid var(--border);
  transition: background var(--transition-slow), border-color var(--transition-slow), transform var(--transition-slow);
}

.nav--hidden {
  transform: translateY(-100%);
}

[data-theme="dark"] .nav {
  background: rgba(28, 28, 30, 0.85);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 56px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  flex-shrink: 0;
}

.nav__logo:hover {
  color: var(--text-primary);
}

.nav__logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  display: inline-block;
  transition: transform var(--transition-bounce);
}

.nav__logo:hover .nav__logo-dot {
  transform: scale(1.3);
}

.nav__links {
  display: flex;
  gap: var(--space-6);
  margin-left: var(--space-4);
}

.nav__links > a,
.nav__dropdown > a {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
  padding: 0.25rem 0;
}

.nav__links > a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
  border-radius: 1px;
}

.nav__dropdown > a::after {
  display: none;
}

.nav__links > a:hover,
.nav__links > a.active,
.nav__dropdown > a:hover,
.nav__dropdown > a.active {
  color: var(--text-primary);
}

.nav__links > a:hover::after,
.nav__links > a.active::after,
.nav__dropdown > a:hover::after,
.nav__dropdown > a.active::after {
  width: 100%;
}

/* Dropdown submenu */
.nav__dropdown {
  position: relative;
}

.nav__dropdown-arrow {
  display: inline-block;
  margin-left: 2px;
  transition: transform var(--transition);
}

.nav__dropdown:hover .nav__dropdown-arrow {
  transform: rotate(180deg);
}

.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 130px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  opacity: 0;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-md);
  z-index: 300;
}

/* Hover bridge - invisible gap filler between trigger and menu */
.nav__dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: 8px;
  z-index: 301;
}

.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown.open .nav__dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(10px);
}

.nav__dropdown.open .nav__dropdown-arrow {
  transform: rotate(180deg);
}

.nav__dropdown-menu a {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
}

.nav__dropdown-menu a:hover {
  background: var(--accent-subtle);
  color: var(--accent);
  padding-left: var(--space-4);
}

/* Entrance stagger for menu items */
.nav__dropdown-menu a:nth-child(1) { transition-delay: 0s; }
.nav__dropdown-menu a:nth-child(2) { transition-delay: 0.03s; }
.nav__dropdown-menu a:nth-child(3) { transition-delay: 0.06s; }
.nav__dropdown-menu a:nth-child(4) { transition-delay: 0.09s; }

/* Mobile hide dropdown */
@media (max-width: 768px) {
  .nav__dropdown-menu {
    display: none;
  }
}

.nav__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  padding: var(--space-1) var(--space-2);
  display: flex;
  align-items: center;
  transition: all var(--transition);
}

.theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
  transform: rotate(15deg);
}

/* ===== Main ===== */
.main {
  /* padding-top accounts for fixed nav */
  padding-top: 56px;
}

/* ===== Hero Section - Full Screen ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--bg);
  border-bottom: none;
  padding: var(--space-20) 0 var(--space-16);
}

/* Gradient overlay at bottom */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg), transparent);
  pointer-events: none;
  z-index: 2;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-10);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  width: 100%;
  position: relative;
  z-index: 3;
}

.hero__content {
  animation: heroFadeInUp 1s ease both;
}

.hero__title {
  margin-bottom: var(--space-5);
}

.hero__title-line {
  font-size: clamp(2.8rem, 5.5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  display: block;
  background: linear-gradient(135deg, var(--text-primary) 40%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__description {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: var(--space-5);
  line-height: 1.7;
  max-width: 420px;
  animation: heroFadeInUp 1s 0.3s ease both;
}

/* Hero social link */
.hero__social {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  animation: heroFadeInUp 1s 0.35s ease both;
}

.hero__social-link {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: color var(--transition);
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.hero__social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* Hero stats */
.hero__stats {
  display: flex;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
  animation: heroFadeInUp 1s 0.4s ease both;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.hero-stat__value {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.hero-stat__label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero__actions {
  display: flex;
  gap: var(--space-3);
  animation: heroFadeInUp 1s 0.45s ease both;
}

.hero__illustration {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: heroFadeIn 1.2s 0.6s ease both;
}

.hero__illustration svg {
  width: 100%;
  max-width: 480px;
  height: auto;
}

/* ===== Hero Floating Particles ===== */
.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.12;
  animation: particleFloat 8s ease-in-out infinite;
}

@keyframes particleFloat {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.08; }
  25% { transform: translateY(-30px) scale(1.1); opacity: 0.15; }
  50% { transform: translateY(-15px) scale(0.95); opacity: 0.1; }
  75% { transform: translateY(-40px) scale(1.05); opacity: 0.14; }
}

/* ===== Hero Scroll Indicator ===== */
.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  animation: heroFadeIn 1s 1s ease both;
  z-index: 3;
  cursor: pointer;
}

.hero__scroll-text {
  font-family: var(--font-display);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero__scroll-arrow {
  animation: scrollBounce 2s ease-in-out infinite;
  color: var(--text-muted);
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(6px); opacity: 1; }
}

/* ===== Hero animations ===== */
@keyframes heroFadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes heroFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== Section common ===== */
.section {
  padding: var(--space-20) 0;
  border-bottom: 1px solid var(--border);
}

.section__header {
  margin-bottom: var(--space-10);
}

.section__title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin-top: var(--space-2);
}

/* ===== Section Label ===== */
.section-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: inline-block;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 16px;
  height: 2px;
  background: var(--accent);
  transform: translateY(-50%);
  border-radius: 1px;
}

/* ===== Featured / Posts Grid ===== */
.featured {
  padding: var(--space-20) 0;
  border-bottom: 1px solid var(--border);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.post-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  position: relative;
  isolation: isolate;
}

.post-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0.12;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='hd-pc'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.03' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3Crect width='200' height='200' fill='none' stroke='%232C2C2C' stroke-width='2' filter='url(%23hd-pc)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.post-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.post-card__thumb {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--border-light);
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.post-card:hover .post-card__thumb img {
  transform: scale(1.06);
}

.post-card__cover-placeholder {
  width: 100%;
  height: 100%;
  background: var(--border-light);
}

.post-card__cover-placeholder svg {
  width: 100%;
  height: 100%;
  display: block;
}

.post-card__body {
  padding: var(--space-5);
}

.post-card__meta {
  font-family: var(--font-display);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: var(--space-3);
  display: flex;
  gap: var(--space-3);
}

.post-card__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
  transition: color var(--transition);
}

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

.post-card__excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.post-card__readmore {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.post-card:hover .post-card__readmore {
  color: var(--accent);
  gap: var(--space-2);
}

/* ===== Tag ===== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.6rem;
  border-radius: 99px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg);
  transition: all var(--transition);
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

/* ===== Stats Cards ===== */
.stats-cards {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--border);
}

.stats-cards__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.stat-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  text-align: center;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  position: relative;
  isolation: isolate;
}

.stat-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0.12;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='hd-sc'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.03' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3Crect width='200' height='200' fill='none' stroke='%232C2C2C' stroke-width='2' filter='url(%23hd-sc)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.stat-card__icon {
  display: inline-flex;
  color: var(--accent);
  margin-bottom: var(--space-3);
  opacity: 0.8;
}

.stat-card__value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-card__label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* ===== Tags Cloud ===== */
.tags-cloud {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--border);
}

.tags-cloud__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
  justify-content: center;
  padding: var(--space-6) 0;
}

.tag-cloud-item {
  font-family: var(--font-display);
  text-decoration: none;
  color: var(--text-secondary);
  border: 1.5px solid var(--border);
  border-radius: 99px;
  padding: 0.3rem 0.9rem;
  transition: all var(--transition);
  font-size: calc(0.75rem + (var(--tag-size, 1) * 0.08rem));
  line-height: 1.4;
}

.tag-cloud-item sup {
  font-size: 0.6em;
  color: var(--text-muted);
  margin-left: 2px;
}

.tag-cloud-item:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-subtle);
  transform: translateY(-2px);
}

/* ===== Quick Navigation ===== */
.quick-nav {
  padding: var(--space-16) 0;
  border-bottom: 1px solid var(--border);
}

.quick-nav__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.quick-nav__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
  padding: var(--space-6) var(--space-4);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition-slow);
  cursor: pointer;
  text-decoration: none;
  position: relative;
  isolation: isolate;
}

.quick-nav__card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0.12;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='hd-qn'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.03' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3Crect width='200' height='200' fill='none' stroke='%232C2C2C' stroke-width='2' filter='url(%23hd-qn)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.quick-nav__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.quick-nav__card--soon {
  cursor: default;
  opacity: 0.6;
}

.quick-nav__card--soon:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--border);
}

.quick-nav__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--accent-subtle);
  transition: all var(--transition);
}

.quick-nav__card:hover .quick-nav__icon {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.quick-nav__title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.quick-nav__desc {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Quote Section ===== */
.quote-section {
  padding: var(--space-16) 0;
}

.quote-card {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-8) var(--space-6);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  isolation: isolate;
}

.quote-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0.12;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='hd-qc'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.03' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3Crect width='200' height='200' fill='none' stroke='%232C2C2C' stroke-width='2' filter='url(%23hd-qc)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.quote-card__mark {
  font-family: var(--font-display);
  font-size: 4rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.3;
  margin-bottom: var(--space-2);
}

.quote-card__text {
  font-family: var(--font-body);
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: var(--space-4);
}

.quote-card__from {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Responsive for new sections ===== */
@media (max-width: 768px) {
  .stats-cards__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .quick-nav__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-card__value {
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  .stats-cards__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .quick-nav__grid {
    grid-template-columns: 1fr;
  }

  .quote-card {
    padding: var(--space-6) var(--space-4);
  }

  .quote-card__text {
    font-size: 0.95rem;
  }
}

/* ===== Scroll Reveal Animation ===== */
.reveal-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for grid items */
.posts-grid .reveal-item:nth-child(1) { transition-delay: 0.05s; }
.posts-grid .reveal-item:nth-child(2) { transition-delay: 0.1s; }
.posts-grid .reveal-item:nth-child(3) { transition-delay: 0.15s; }
.posts-grid .reveal-item:nth-child(4) { transition-delay: 0.2s; }
.posts-grid .reveal-item:nth-child(5) { transition-delay: 0.25s; }

/* ===== Footer ===== */
.footer {
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: var(--space-10);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-6);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.footer__desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__social a {
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: all var(--transition);
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.footer__social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-subtle);
}

/* Footer stats */
.footer__stats {
  display: flex;
  gap: var(--space-5);
}

.footer-stat {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.footer-stat__value {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-stat__label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Footer columns */
.footer__col-title {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.footer__link {
  display: block;
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
  transition: color var(--transition);
}

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

.footer__copyright {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* ===== Article Detail ===== */
.post-article {
  padding: var(--space-8) 0 var(--space-16);
  position: relative;
}

/* Article right-side decoration illustration */
.post-article::after {
  content: '';
  position: fixed;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  width: 240px;
  height: 320px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 240 320'%3E%3Cdefs%3E%3Cfilter id='ar'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.03' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3C/defs%3E%3Ccircle cx='120' cy='60' r='45' fill='none' stroke='%23D97757' stroke-width='2' filter='url(%23ar)' opacity='0.8'/%3E%3Cpath d='M70 160 C95 140 130 135 155 150 C175 162 190 180 200 200' fill='none' stroke='%23D97757' stroke-width='1.8' filter='url(%23ar)' opacity='0.6'/%3E%3Crect x='30' y='220' width='40' height='40' fill='%238D9A7F' opacity='0.3' transform='rotate(-12 30 220)' filter='url(%23ar)'/%3E%3Ccircle cx='180' cy='270' r='20' fill='%238D9A7F' opacity='0.25' filter='url(%23ar)'/%3E%3Cpath d='M20 300 Q60 290 100 298 Q140 306 180 296 Q210 288 240 296' fill='none' stroke='%23B0B8A8' stroke-width='1.2' filter='url(%23ar)' opacity='0.5'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

@media (max-width: 1200px) {
  .post-article::after {
    display: none;
  }
}

.post-article__back {
  margin-bottom: var(--space-8);
}

.post-article__back a {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: color var(--transition);
}

.post-article__back a:hover {
  color: var(--accent);
}

.post-article__header {
  margin-bottom: var(--space-6);
}

.post-article__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.post-article__meta {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.meta-sep {
  color: var(--text-muted);
}

.post-article__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
}

.post-article__body {
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--text-primary);
}

.post-article__body p {
  margin-bottom: 1.3em;
}

.post-article__body h2 {
  font-size: 1.5rem;
  margin-top: 2.5em;
  margin-bottom: 0.75em;
  padding-bottom: 0.3em;
  border-bottom: 1px solid var(--border-light);
}

.post-article__body h3 {
  font-size: 1.2rem;
  margin-top: 2em;
  margin-bottom: 0.6em;
}

.post-article__body h4 {
  font-size: 1.05rem;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  font-family: var(--font-ui);
  font-weight: 600;
}

.post-article__body ul,
.post-article__body ol {
  margin-bottom: 1.5em;
}

.post-article__body li {
  margin-bottom: 0.3em;
}

.post-article__body img {
  margin: var(--space-6) auto;
  border-radius: var(--radius);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  max-width: 85%;
  height: auto;
  display: block;
}

@media (min-width: 900px) {
  .post-article__body img {
    max-width: 75%;
  }
}

.post-article__body img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg);
}

@media (max-width: 480px) {
  .post-article__body img {
    max-width: 100%;
  }
}

.post-article__body a {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}

.post-article__body a:hover {
  text-decoration-thickness: 2px;
}

.post-article__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

.post-nav__prev a,
.post-nav__next a {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.post-nav__prev a:hover,
.post-nav__next a:hover {
  border-color: var(--accent);
  background: var(--accent-subtle);
  transform: translateY(-2px);
}

.post-nav__next {
  text-align: right;
}

.post-nav__label {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.post-nav__title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: color var(--transition);
}

.post-nav__prev:hover .post-nav__title,
.post-nav__next:hover .post-nav__title {
  color: var(--accent);
}

/* ===== Page ===== */
.page-article {
  padding: var(--space-12) 0 var(--space-16);
}

.page-article__header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
}

.page-article__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
}

.page-article__body {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.page-article__body p {
  margin-bottom: 1.2em;
}

/* ===== Archive Page ===== */
.archive-page {
  padding: var(--space-12) 0 var(--space-16);
}

.archive-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

/* Left: Category Cards */
.archive-categories__header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.archive-categories__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
}

.archive-categories__grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.archive-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--transition-slow);
  cursor: pointer;
  position: relative;
  isolation: isolate;
}

.archive-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  z-index: 1;
  opacity: 0.12;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='80'%3E%3Cfilter id='hda'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.03' numOctaves='4'/%3E%3CfeDisplacementMap in='SourceGraphic' scale='2.5'/%3E%3C/filter%3E%3Crect width='200' height='80' fill='none' stroke='%232C2C2C' stroke-width='2' filter='url(%23hda)'/%3E%3C/svg%3E");
  background-size: 100% 100%;
}

.archive-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.archive-card__num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.5;
  line-height: 1;
  min-width: 1.5em;
}

.archive-card__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}

.archive-card__count {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Right: Timeline */
.archive-timeline__header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.archive-timeline__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: var(--space-1);
}

.archive-timeline__subtitle {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.timeline {
  position: relative;
  padding-left: var(--space-6);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
  border-radius: 1px;
}

.timeline-year {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: var(--space-6) 0 var(--space-4);
  position: relative;
}

.timeline-year::before {
  content: '';
  position: absolute;
  left: -23px;
  top: 50%;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateY(-50%);
  border: 2px solid var(--bg);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  cursor: pointer;
  transition: all var(--transition);
  border-radius: var(--radius-sm);
  padding-left: var(--space-2);
  position: relative;
}

.timeline-item:hover {
  background: var(--accent-subtle);
  padding-left: var(--space-4);
}

.timeline-dot {
  position: absolute;
  left: -19px;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: all var(--transition);
  flex-shrink: 0;
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
  transform: scale(1.3);
}

.timeline-date {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 3em;
  padding-top: 2px;
}

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

.timeline-title {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: color var(--transition);
  margin-bottom: var(--space-1);
}

.timeline-item:hover .timeline-title {
  color: var(--accent);
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

@media (max-width: 768px) {
  .archive-layout {
    grid-template-columns: 1fr;
  }

  .timeline {
    padding-left: var(--space-5);
  }

  .timeline-dot {
    left: -17px;
  }

  .timeline-year::before {
    left: -21px;
  }
}

/* ===== AI Navigation Page ===== */
.ai-page {
  padding: var(--space-12) 0 var(--space-16);
}

.ai-page__header {
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-10);
}

.ai-page__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.ai-page__subtitle {
  font-family: var(--font-ui);
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.ai-section {
  margin-bottom: var(--space-10);
}

.ai-section__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-light);
  color: var(--text-primary);
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
}

.ai-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: all var(--transition-slow);
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
}

.ai-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.ai-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.ai-card__info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.ai-card__name {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.ai-card__desc {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ai-card:hover .ai-card__name {
  color: var(--accent);
}

@media (max-width: 768px) {
  .ai-grid {
    grid-template-columns: 1fr;
  }

  .ai-card {
    padding: var(--space-3);
  }

  .ai-page__title {
    font-size: clamp(1.5rem, 5vw, 2rem);
  }
}

/* ===== Empty State ===== */
.empty-state {
  font-family: var(--font-display);
  color: var(--text-muted);
  padding: var(--space-12) 0;
  text-align: center;
}

/* ===== SVG Illustration ===== */
.illustration {
  width: 100%;
  max-width: 400px;
}

/* ===== Loading screen pulse ===== */
@keyframes pulseGlow {
  0%, 100% { opacity: 0.08; transform: scale(1); }
  50% { opacity: 0.15; transform: scale(1.05); }
}

/* ===== Mobile Menu ===== */
.menu-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.menu-toggle:hover {
  border-color: var(--text-muted);
}

.menu-toggle__line {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all var(--transition);
}

.menu-toggle.active .menu-toggle__line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle.active .menu-toggle__line:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active .menu-toggle__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Menu - Full screen overlay */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu__overlay {
  position: absolute;
  inset: 0;
  background: rgba(28, 28, 30, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.mobile-menu__panel {
  position: relative;
  width: 85%;
  max-width: 320px;
  height: 100%;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  box-shadow: -4px 0 30px rgba(0,0,0,0.1);
}

.mobile-menu.open .mobile-menu__panel {
  transform: translateX(0);
}

.mobile-menu__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border);
  min-height: 56px;
}

.mobile-menu__header .nav__logo {
  font-size: 1rem;
}

.menu-close {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  padding: var(--space-1);
  display: flex;
  align-items: center;
  transition: all var(--transition);
}

.menu-close:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.mobile-menu__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: var(--space-4) 0;
  overflow-y: auto;
}

.mobile-menu__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  transition: all var(--transition);
  border-bottom: 1px solid var(--border-light);
}

.mobile-menu__link:hover {
  background: var(--accent-subtle);
  color: var(--accent);
  padding-left: var(--space-7, 28px);
}

.mobile-menu__link svg {
  color: var(--text-muted);
  opacity: 0;
  transition: all var(--transition);
}

.mobile-menu__link:hover svg {
  opacity: 1;
  color: var(--accent);
}

.mobile-menu__footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border);
}

.mobile-theme-toggle {
  width: 100%;
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text-secondary);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  transition: all var(--transition);
}

.mobile-theme-toggle:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

/* ===== Large Screens (1200px+) ===== */
@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }

  .hero__inner {
    max-width: 1200px;
  }

  .hero__title-line {
    font-size: clamp(3rem, 4.5vw, 4.2rem);
  }

  .hero__content {
    padding-right: var(--space-8);
  }

  .posts-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .nav__inner {
    max-width: 1200px;
  }

  .section {
    padding: var(--space-24, 96px) 0;
  }
}

/* ===== Desktop (1024px-1200px) ===== */
@media (max-width: 1199px) and (min-width: 1025px) {
  .container {
    max-width: 960px;
  }

  .hero__inner {
    max-width: 960px;
  }

  .posts-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
  }

  .post-card__body {
    padding: var(--space-4);
  }
}

/* ===== Tablet Landscape / Small Desktop (900px-1024px) ===== */
@media (max-width: 1024px) and (min-width: 901px) {
  body {
    font-size: 16px;
  }

  .container {
    max-width: 880px;
  }

  .hero__inner {
    max-width: 880px;
    gap: var(--space-6);
  }

  .hero__title-line {
    font-size: clamp(2.4rem, 4vw, 3rem);
  }

  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }

  .section {
    padding: var(--space-16) 0;
  }
}

/* ===== Tablet Portrait (768px-900px) ===== */
@media (max-width: 900px) and (min-width: 769px) {
  body {
    font-size: 16px;
  }

  .container {
    max-width: 720px;
  }

  .hero {
    min-height: 90vh;
    padding: var(--space-16) 0 var(--space-12);
  }

  .hero__inner {
    max-width: 720px;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }


  .hero__title-line {
    font-size: clamp(2.2rem, 3.5vw, 2.8rem);
  }

  .hero__illustration {
    max-width: 260px;
  }

  .hero__illustration svg {
    max-width: 260px;
  }

  .hero__description {
    max-width: 100%;
  }

  .hero__actions {
    flex-direction: column;
  }

  .posts-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .article-sidebar {
    position: static;
  }

  .section {
    padding: var(--space-14, 56px) 0;
  }
}

/* ===== Large Phone / Small Tablet (480px-768px) ===== */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .nav__links {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    min-height: calc(100vh - 56px);
    padding: var(--space-12) 0 var(--space-10);
    align-items: flex-start;
    padding-top: var(--space-16);
  }

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

  .hero__title-line {
    font-size: clamp(2.2rem, 7vw, 2.8rem);
  }

  .hero__description {
    max-width: 100%;
    font-size: 0.9375rem;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__scroll {
    display: none;
  }

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

  .post-card {
    max-width: 100%;
  }

  .post-card__body {
    padding: var(--space-4);
  }

  .footer__bottom {
    text-align: center;
  }

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

  .post-nav__next {
    text-align: left;
  }

  .container--narrow {
    padding: 0 var(--space-4);
  }

  .container {
    padding: 0 var(--space-4);
  }

  .section {
    padding: var(--space-12) 0;
  }

  .page-article__title,
  .post-article__title {
    font-size: clamp(1.4rem, 4vw, 1.8rem);
  }

  .post-article__body {
    font-size: 0.9375rem;
  }

  .post-article__body h2 {
    font-size: 1.3rem;
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    display: none;
  }
}

/* ===== Small Phone (< 480px) ===== */
@media (max-width: 480px) {
  body {
    font-size: 14px;
  }

  .hero {
    padding-top: var(--space-12);
  }

  .hero__title-line {
    font-size: clamp(1.6rem, 8vw, 2rem);
  }

  .hero__description {
    font-size: 0.875rem;
  }

  .section-label {
    font-size: 0.7rem;
  }

  .section__title {
    font-size: 1.3rem;
  }

  .post-card__title {
    font-size: 1rem;
  }

  .post-card__excerpt {
    -webkit-line-clamp: 2;
  }

  .footer__nav-links {
    justify-content: center;
  }

  .footer__nav,
  .footer__meta {
    text-align: center;
  }

  .mobile-menu__link {
    font-size: 1.25rem;
  }

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

  .post-nav__prev a,
  .post-nav__next a {
    padding: var(--space-3);
  }
}

/* ===== Print ===== */
@media print {
  .nav,
  .footer,
  .noise-overlay,
  .theme-toggle,
  .hero__scroll,
  .hero-particles {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 2rem 0;
  }

  body {
    background: white;
    color: black;
  }
}