/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a24;
  --accent: #00d4ff;
  --accent-hover: #33ddff;
  --accent-muted: rgba(0,212,255,0.08);
  --accent-glow: rgba(0,212,255,0.12);
  --accent-secondary: #7c3aed;
  --accent-warm: #ff6b6b;
  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #5a5a72;
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(0,212,255,0.30);
  --code-bg: #121a24;

  /* Layout */
  --container-max: 680px;
  --container-wide: 960px;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16,1,0.3,1);
  --ease-spring: cubic-bezier(0.34,1.56,0.64,1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
}

/* ===== RESET ===== */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0 }
html { scroll-behavior: smooth; font-size: 16px }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit }
ul, ol { list-style: none }
img { max-width: 100%; height: auto; display: block }

::selection { background: rgba(0,212,255,0.3); color: #fff }

/* ===== GRAIN OVERLAY ===== */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url('assets/grain.png');
  background-repeat: repeat;
  opacity: 0.03;
  pointer-events: none;
  z-index: 9999;
}

/* ===== AMBIENT GLOW ===== */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0,212,255,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(124,58,237,0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px }
::-webkit-scrollbar-track { background: transparent }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px }
::-webkit-scrollbar-thumb:hover { background: rgba(0,212,255,0.3) }

/* ===== PROGRESS BAR (article pages) ===== */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-secondary), #ff6b6b);
  z-index: 9999;
  transition: width 0.1s ease-out;
  box-shadow: 0 0 12px rgba(0,212,255,0.5);
}

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--duration-normal);
}
.header--scrolled { box-shadow: 0 2px 16px rgba(0,0,0,0.3) }
.header__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo { display: flex; align-items: center; gap: 10px }
.logo svg {
  width: 36px; height: 36px;
  transition: filter var(--duration-fast);
}
.logo:hover svg { filter: drop-shadow(0 0 6px rgba(0,212,255,0.5)) }
.logo__text {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

/* Desktop Nav */
.nav { display: flex; gap: 28px; align-items: center }
.nav__link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  display: inline-block;
  transition: color var(--duration-fast);
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-fast);
}
.nav__link:hover { color: var(--text-primary) }
.nav__link:hover::after { transform: scaleX(1) }
.nav__link--active { color: var(--accent) }
.nav__link--active::after { transform: scaleX(1) }

/* Burger */
.burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-direction: column;
  gap: 6px;
}
.burger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--duration-normal);
}
.burger--open span:first-child { transform: rotate(45deg) translate(5px,5px) }
.burger--open span:last-child { transform: rotate(-45deg) translate(5px,-5px) }

/* Mobile Nav */
.mobile-nav {
  display: none;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--duration-normal) var(--ease-out);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}
.mobile-nav--open { max-height: 300px }
.mobile-nav__inner { padding: 16px 24px }
.mobile-nav__link {
  display: block;
  padding: 12px 0;
  font-size: 1.25rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: color var(--duration-fast);
}
.mobile-nav__link:last-child { border-bottom: none }
.mobile-nav__link:hover { color: var(--accent) }

/* ===== MAIN ===== */
main { position: relative; z-index: 1 }

/* ===== HERO ===== */
.hero {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 80px 24px 56px;
  text-align: center;
  position: relative;
}
.hero-inner { max-width: 720px; margin: 0 auto }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--accent-muted);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s var(--ease-out);
}
.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1 }
  50% { opacity: 0.5 }
}
.hero h1, .hero__title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s var(--ease-out) 0.1s backwards;
}
.hero h1 .gradient-text, .hero__title .gradient-text {
  background: linear-gradient(135deg, #00d4ff 0%, #7c3aed 60%, #ff6b6b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__subtitle, .hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.6;
  animation: fadeInUp 0.6s var(--ease-out) 0.2s backwards;
}
.hero__stats, .hero-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s var(--ease-out) 0.3s backwards;
}
.hero-stat { display: flex; flex-direction: column; align-items: center }
.hero-stat__number, .hero-stat-num {
  font-size: 22px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-primary);
}
.hero-stat__label, .hero-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

/* ===== FILTERS ===== */
.articles__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.filter-btn {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-tertiary);
}
.filter-btn.active {
  background: var(--accent-muted);
  border-color: rgba(0,212,255,0.4);
  color: var(--accent);
}
.filter-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}
.filter-btn.active .filter-count {
  background: rgba(0,212,255,0.15);
  color: var(--accent);
}

/* Legacy class support */
.filters-section {
  max-width: var(--container-wide);
  margin: 0 auto 40px;
  padding: 0 24px;
}
.filters-label {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.filters-label::before {
  content: '';
  width: 16px;
  height: 1px;
  background: var(--text-muted);
}
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.filter:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-tertiary);
}
.filter--active {
  background: var(--accent-muted);
  border-color: rgba(0,212,255,0.4);
  color: var(--accent);
}

/* ===== ARTICLES SECTION ===== */
.articles {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* Cards grid — 2 columns on desktop */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

/* ===== CARD ===== */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.35s var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.6s var(--ease-out) backwards;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.4), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3), 0 0 40px rgba(0,212,255,0.08);
}
.card:hover::before { opacity: 1 }
.card:hover .card__title a { color: var(--accent) }

.card__number {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card__number::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}
.card__title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.card__title a {
  color: var(--text-primary);
  transition: color 0.25s;
}
.card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.card__meta-sep { opacity: 0.4 }
.card__excerpt {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.card__tags { display: flex; flex-wrap: wrap; gap: 6px }
.tag {
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 4px 10px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.12);
  color: var(--accent);
  border-radius: var(--radius-full);
  transition: all 0.2s;
  cursor: pointer;
}
.tag:hover {
  background: rgba(0,212,255,0.18);
  border-color: rgba(0,212,255,0.4);
}

/* Card filter states */
.card--hiding {
  opacity: 0;
  transform: scale(0.98);
  pointer-events: none;
}
.card--hidden { display: none }

/* Empty state */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state__icon { font-size: 48px; margin-bottom: 16px; opacity: 0.5 }

/* ===== ARTICLE PAGE ===== */
.article-page {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px 80px;
  position: relative;
  z-index: 1;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85em;
  font-weight: 500;
  margin: 32px 0;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(18,18,26,0.6);
  backdrop-filter: blur(12px);
  transition: all 0.3s var(--ease-out);
}
.back-link:hover {
  color: var(--accent);
  border-color: var(--border-hover);
  background: var(--accent-glow);
  transform: translateX(-4px);
}

/* Article header */
.article-header {
  text-align: center;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.article-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.article-header__meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.article-header__tags { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px }

/* Article body */
.article-body {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-primary);
  padding-bottom: 80px;
}
.article-body h2 {
  color: var(--text-primary);
  font-size: 1.5em;
  font-weight: 700;
  margin: 56px 0 20px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  letter-spacing: -0.01em;
  position: relative;
}
.article-body h2::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.article-body h3 {
  color: var(--accent-warm);
  font-size: 1.2em;
  font-weight: 600;
  margin: 36px 0 14px;
  letter-spacing: -0.01em;
}
.article-body p { margin-bottom: 20px; color: var(--text-primary) }
.article-body a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.article-body a:hover { border-bottom-color: var(--accent) }

/* Code */
.article-body code {
  font-family: var(--font-mono);
  background: rgba(0,212,255,0.08);
  color: var(--accent);
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.88em;
  font-weight: 500;
}
.article-body pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  overflow-x: auto;
  margin: 24px 0;
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}
.article-body pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.2), transparent);
}
.article-body pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
  font-size: 0.9em;
  line-height: 1.7;
}

/* Lists */
.article-body ul, .article-body ol { margin: 20px 0; padding-left: 28px; }
.article-body ul { list-style: disc }
.article-body ol { list-style: decimal }
.article-body li {
  margin-bottom: 10px;
  color: var(--text-primary);
}
.article-body li::marker { color: var(--accent) }
.article-body strong { color: #fff; font-weight: 600 }

/* Blockquote */
.article-body blockquote {
  border-left: 3px solid var(--accent);
  margin: 28px 0;
  padding: 16px 24px;
  background: var(--accent-glow);
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* HR */
.article-body hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 48px 0;
}

/* Tables */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9em;
}
.article-body th, .article-body td {
  padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left;
}
.article-body th {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--text-primary);
}
.article-body td { color: var(--text-secondary) }

/* TOC */
.toc {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 32px 0;
}
.toc__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}
.toc ul { margin: 0; padding: 0; list-style: none }
.toc li { margin-bottom: 8px }
.toc li a {
  color: var(--text-secondary);
  font-size: 0.9em;
  border: none;
  transition: color 0.2s;
}
.toc li a:hover { color: var(--accent) }
.toc li.toc-h3 { padding-left: 16px }

/* Author block */
.author-block {
  text-align: center;
  padding: 48px 0;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 64px;
}
.author-block p { margin-bottom: 8px; font-size: 0.92em }
.author-block a { color: var(--accent); font-weight: 500 }

/* Article nav (prev/next) */
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.article-nav__link {
  display: flex;
  flex-direction: column;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.3s var(--ease-out);
  flex: 1;
  max-width: 48%;
}
.article-nav__link:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.article-nav__label {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 4px;
}
.article-nav__title {
  font-size: 0.9em;
  color: var(--text-primary);
  font-weight: 500;
}
.article-nav__link:hover .article-nav__title { color: var(--accent) }
.article-nav__next { text-align: right; align-items: flex-end }

/* ===== ABOUT PAGE ===== */
.about {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.profile {
  text-align: center;
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
  animation: fadeInUp 0.5s var(--ease-out) forwards;
}
.profile__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  margin: 0 auto 20px;
  box-shadow: 0 0 40px rgba(0,212,255,0.1);
}
.profile__name {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.profile__subtitle {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Bio */
.bio { animation: fadeInUp 0.5s var(--ease-out) 0.1s forwards }
.bio__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.bio__text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.bio__cta {
  display: inline-block;
  margin-top: 24px;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--accent);
  position: relative;
  transition: color var(--duration-fast);
}
.bio__cta::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-fast);
}
.bio__cta:hover::after { transform: scaleX(1) }

/* Stats */
.stats {
  margin-top: 48px;
  padding: 48px 0;
  border-top: 1px solid var(--border);
  animation: fadeInUp 0.5s var(--ease-out) 0.2s forwards;
}
.stats__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: box-shadow var(--duration-normal), border-color var(--duration-normal);
}
.stat-card:hover {
  box-shadow: 0 0 40px rgba(0,212,255,0.08);
  border-color: var(--border-hover);
}
.stat-card__number {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}
.stat-card__label { font-size: 0.875rem; color: var(--text-secondary) }

/* Social */
.social {
  margin-top: 48px;
  padding: 48px 0 96px;
  border-top: 1px solid var(--border);
  animation: fadeInUp 0.5s var(--ease-out) 0.3s forwards;
}
.social__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}
.social__list { display: flex; flex-direction: column; gap: 0 }
.social__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: all var(--duration-fast);
}
.social__row:last-child { border-bottom: none }
.social__row:hover .social__platform { color: var(--accent) }
.social__row:hover .social__handle { color: var(--text-primary) }
.social__row:hover .social__arrow { opacity: 1 }
.social__platform { font-size: 1rem; color: var(--text-primary); transition: color var(--duration-fast) }
.social__handle-row { display: flex; align-items: center; gap: 8px }
.social__handle { font-size: 0.875rem; color: var(--text-secondary); transition: color var(--duration-fast) }
.social__arrow { font-size: 0.875rem; color: var(--accent); opacity: 0; transition: opacity 150ms }

/* ===== FOOTER ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
  max-width: var(--container-wide);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
  background: rgba(10,10,15,0.5);
  backdrop-filter: blur(8px);
}
.footer__copy { font-size: 0.75rem; color: var(--text-muted) }
.footer__links { display: flex; gap: 24px }
.footer__link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  position: relative;
  transition: color var(--duration-fast);
}
.footer__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-fast);
}
.footer__link:hover { color: var(--accent) }
.footer__link:hover::after { transform: scaleX(1) }

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px) }
  to { opacity: 1; transform: translateY(0) }
}

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

/* Tablet */
@media (max-width: 1023px) {
  .hero { padding: 64px 24px 48px }
  .cards-grid { grid-template-columns: 1fr; }
}

/* Mobile */
@media (max-width: 767px) {
  .nav { display: none }
  .burger { display: flex }
  .mobile-nav { display: block }
  .hero { padding: 48px 20px 32px }
  .hero h1 { font-size: 1.75rem }
  .hero-stats { gap: 20px }
  .hero-stat-num { font-size: 18px }
  .articles { padding: 0 16px 64px }
  .articles__filter { margin-bottom: 24px }
  .cards-grid { grid-template-columns: 1fr; gap: 14px }
  .card { padding: 20px }
  .card__title { font-size: 1.1rem }
  .filters-section { padding: 0 16px }
  .filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
  }
  .filters::-webkit-scrollbar { height: 4px }
  .filters::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px }
  .filter { flex-shrink: 0 }
  .footer { flex-direction: column; gap: 16px; text-align: center }
  .stats__grid { grid-template-columns: repeat(2, 1fr) }
  .article-page { padding: 0 16px 60px }
  .article-body { font-size: 16px }
  .article-body h2 { font-size: 1.3em }
  .article-header h1 { font-size: 1.8rem }
  .article-nav { flex-direction: column }
  .article-nav__link { max-width: 100% }
  .about { padding: 0 16px }
  .profile { padding: 48px 0 36px; margin-bottom: 32px }
  .profile__avatar { width: 64px; height: 64px; font-size: 32px }
  .profile__name { font-size: 1.75rem }
}

/* Small mobile */
@media (max-width: 479px) {
  .header__inner { padding: 0 16px }
  .card__title { font-size: 1rem }
  .stats__grid { gap: 12px }
  .stat-card { padding: 16px }
  .stat-card__number { font-size: 1.4rem }
}