/* === HACKHERWAY SECURITY — styles.css === */
@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500;600;700&family=Outfit:wght@300;400;500;600;700;800;900&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  --bg-black: #08080a;
  --bg-dark: #0e0e12;
  --bg-card: #131318;
  --bg-sidebar: #0b0b0f;
  --bg-elevated: #1a1a22;
  --bg-input: #16161e;
  --border-dark: #1e1e28;
  --border-medium: #2a2a36;
  --border-light: #3a3a48;
  --text-primary: #eaeaf0;
  --text-secondary: #9898a8;
  --text-muted: #5c5c6e;
  --pink: #ff0066;
  --pink-light: #ff3388;
  --pink-glow: rgba(255, 0, 102, 0.25);
  --pink-subtle: rgba(255, 0, 102, 0.08);
  --green-terminal: #00ff88;
  --blue-code: #66bbff;
  --yellow-code: #ffd866;
  --purple-code: #c792ea;
  --orange-code: #ff9e64;
  --sidebar-w: 280px;
  --navbar-h: 56px;
  --toc-w: 240px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scrollbar-width: thin; scrollbar-color: var(--pink) var(--bg-dark); }
body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg-black);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--pink); border-radius: 3px; }
a { color: var(--pink); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--pink-light); }
img { max-width: 100%; }

/* --- Navbar --- */
.navbar {
  position: fixed; top: 0; left: var(--sidebar-w); right: 0;
  height: var(--navbar-h);
  background: rgba(8, 8, 10, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-dark);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px;
  z-index: 100;
}
.navbar__brand {
  display: flex; align-items: center; gap: 10px;
  font-family: 'Outfit', sans serif;
  text-transform: uppercase !important;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: -0.3px;
}
.navbar__brand .helix-icon {
  width: 28px; height: 28px;
  background: var(--black);
  border-radius: 6px;
  display: flex; align-itemsf;
}
.navbar__links { display: flex; align-items: center; gap: 8px; }
.navbar__links a {
  color: var(--text-muted);
  font-size: 10px;
  text-transform: uppercase !important;
  letter-spacing: 1.5px;
  padding: 6px 6px;
  border-radius: 6px;
  transition: all var(--transition);
}
.navbar__links a:hover, .navbar__links a.active {
  color: var(--text-primary);
  background: var(--pink-subtle);
}
.navbar__search {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-dark);
  border-radius: 8px;
  padding: 7px 14px;
  transition: all var(--transition);
  cursor: text;
}
.navbar__search:focus-within {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px var(--pink-glow);
}
.navbar__search input {
  background: none; border: none; outline: none;
  color: var(--text-primary);
  font-family: 'Outfit', sans-serif;
  font-size: 13px; width: 180px;
}
.navbar__search input::placeholder { color: var(--text-muted); }
.navbar__search kbd {
  font-family: 'Fira Code', monospace;
  font-size: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--text-muted);
}
.hamburger {
  display: none;
  background: none; border: none; cursor: pointer;
  flex-direction: column; gap: 5px; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-primary);
  transition: all var(--transition);
  border-radius: 1px;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-dark);
  overflow-y: auto; overflow-x: hidden;
  z-index: 110;
  display: flex; flex-direction: column;
}
.sidebar__header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-dark);
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0;
}

.sidebar__logo {
  width: 32px; height: 32px;
  background: linear-gradient(135deg, var(--black), #000000);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  
}

.sidebar__title {
  font-family: 'Outfit', sans serif;
  font-size: 13px; font-weight: 300;
  color: var(--text-primary);
  line-height: 1.2;
}
.sidebar__subtitle {
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.sidebar__nav { padding: 12px 0; flex: 1; }
.sidebar__section { margin-bottom: 4px; }
.sidebar__toggle {
  display: flex; align-items: center; gap: 8px;
  width: 100%;
  padding: 9px 20px;
  background: none; border: none;
  color: var(--text-secondary);
  font-family: 'Outfit', sans-serif;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  position: relative;
}
.sidebar__toggle::before {
  content: '';
  position: absolute; left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 0;
  background: var(--pink);
  border-radius: 0 2px 2px 0;
  transition: height var(--transition);
}
.sidebar__toggle:hover { color: var(--text-primary); background: var(--pink-subtle); }
.sidebar__toggle.active { color: var(--pink); }
.sidebar__toggle.active::before { height: 20px; }
.sidebar__toggle .chevron {
  margin-left: auto;
  font-size: 10px;
  transition: transform var(--transition);
  color: var(--text-muted);
}
.sidebar__toggle.active .chevron { transform: rotate(90deg); color: var(--pink); }
.sidebar__toggle .section-icon {
  font-size: 15px; width: 20px; text-align: center;
}
.sidebar__submenu {
  max-height: 0; overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.sidebar__submenu.open { max-height: 400px; }
.sidebar__submenu a {
  display: block;
  padding: 6px 20px 6px 52px;
  font-size: 12.5px;
  color: var(--text-muted);
  transition: all var(--transition);
  position: relative;
}
.sidebar__submenu a::before {
  content: '';
  position: absolute; left: 38px; top: 50%;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--border-medium);
  transform: translateY(-50%);
  transition: background var(--transition);
}
.sidebar__submenu a:hover { color: var(--text-primary); background: var(--pink-subtle); }
.sidebar__submenu a:hover::before { background: var(--pink); }
.sidebar__submenu a.current {
  color: var(--pink);
  background: var(--pink-subtle);
}
.sidebar__submenu a.current::before { background: var(--pink); }
.sidebar__footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-dark);
  flex-shrink: 0;
}
.sidebar__footer span {
  font-size: 11px;
  color: var(--text-muted);
  font-family: 'Fira Code', monospace;
}

/* --- Main Content (Homepage) --- */
.main {
  margin-left: var(--sidebar-w);
  padding-top: var(--navbar-h);
  min-height: 100vh;
}
.main__content { padding: 40px 48px 80px; max-width: 1100px; }

/* --- Hero Section --- */
.hero {
  position: relative;
  padding: 64px 0 56px;
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, var(--pink-glow) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255,0,102,0.08) 0%, transparent 40%);
  opacity: 0.7;
}
.hero__grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,0,102,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,0,102,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero__content { position: relative; z-index: 1; padding: 50px; }
.hero__tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  color: var(--pink);
  background: var(--pink-subtle);
  border: 1px solid rgba(255,0,102,0.15);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero__tag .pulse {
  width: 6px; height: 6px;
  background: var(--pink);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--pink-glow); }
  50% { opacity: 0.7; box-shadow: 0 0 0 6px transparent; }
}
.hero__title {
  font-family: 'Outfit', sans serif;
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 200;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -1px;
}
.hero__title .pink { color: var(--pink); }
.hero__title .glitch {
  position: relative;
  display: inline-block;
}
.hero__title .glitch::before,
.hero__title .glitch::after {
  content: attr(data-text);
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: 0;
}
.hero__title .glitch:hover::before {
  animation: glitch1 0.3s ease;
  color: #0ff;
  opacity: 0.7;
}
.hero__title .glitch:hover::after {
  animation: glitch2 0.3s ease 0.05s;
  color: var(--pink);
  opacity: 0.7;
}
@keyframes glitch1 {
  0% { clip-path: inset(20% 0 40% 0); transform: translateX(-3px); opacity: 0.7; }
  50% { clip-path: inset(60% 0 10% 0); transform: translateX(3px); opacity: 0.7; }
  100% { clip-path: inset(0); transform: translateX(0); opacity: 0; }
}
@keyframes glitch2 {
  0% { clip-path: inset(50% 0 20% 0); transform: translateX(3px); opacity: 0.7; }
  50% { clip-path: inset(10% 0 60% 0); transform: translateX(-3px); opacity: 0.7; }
  100% { clip-path: inset(0); transform: translateX(0); opacity: 0; }
}
.hero__desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 28px;
}
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 24px;
  border-radius: 8px;
  font-family: 'Outfit', sans-serif;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn--primary {
  background: var(--pink);
  color: #fff;
  box-shadow: 0 4px 20px var(--pink-glow);
}
.btn--primary:hover {
  background: var(--pink-light);
  box-shadow: 0 6px 28px rgba(255,0,102,0.35);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
}
.btn--ghost:hover {
  border-color: var(--pink);
  color: var(--text-primary);
  background: var(--pink-subtle);
}

/* --- Card Grid --- */
.section-heading {
  font-family: 'Space Mono', monospace;
  font-size: 22px; font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}
.section-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 32px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-bottom: 64px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  padding: 28px 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--pink), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.card:hover {
  border-color: rgba(255,0,102,0.3);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4), 0 0 20px var(--pink-glow);
}
.card:hover::before { opacity: 1; }
.card__icon {
  font-size: 28px;
  margin-bottom: 16px;
  display: block;
}
.card__title {
  font-family: 'Space Mono', monospace;
  font-size: 15px; font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.card__desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}
.card__link {
  font-size: 12px; font-weight: 600;
  color: var(--pink);
  display: inline-flex; align-items: center; gap: 6px;
  transition: gap var(--transition);
}
.card:hover .card__link { gap: 10px; }

/* --- Accordion --- */
.accordion { margin-bottom: 64px; }
.accordion__item {
  border: 1px solid var(--border-dark);
  border-radius: 10px;
  margin-bottom: 8px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.accordion__item.open {
  border-color: rgba(255,0,102,0.25);
}
.accordion__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-card);
  border: none; width: 100%;
  color: var(--text-primary);
  font-family: 'Outfit', sans-serif;
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}
.accordion__header:hover { background: var(--bg-elevated); }
.accordion__item.open .accordion__header {
  background: var(--pink-subtle);
  color: var(--pink);
}
.accordion__icon {
  font-size: 18px;
  transition: transform var(--transition);
  color: var(--text-muted);
}
.accordion__item.open .accordion__icon {
  transform: rotate(45deg);
  color: var(--pink);
}
.accordion__body {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.accordion__body-inner {
  padding: 16px 20px 20px;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  background: var(--bg-dark);
  border-top: 1px solid var(--border-dark);
}

/* --- Code Block --- */
.code-section { margin-bottom: 64px; }
.code-block {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  overflow: hidden;
}
.code-block__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border-dark);
}
.code-block__dots {
  display: flex; gap: 6px;
}
.code-block__dots span {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.code-block__dots span:nth-child(1) { background: #ff5f57; }
.code-block__dots span:nth-child(2) { background: #ffbd2e; }
.code-block__dots span:nth-child(3) { background: #28ca41; }
.code-block__lang {
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  color: var(--text-muted);
}
.code-block__copy {
  background: var(--bg-input);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  padding: 4px 12px;
  border-radius: 5px;
  cursor: pointer;
  transition: all var(--transition);
}
.code-block__copy:hover {
  border-color: var(--pink);
  color: var(--pink);
  background: var(--pink-subtle);
}
.code-block__copy.copied {
  background: var(--pink);
  border-color: var(--pink);
  color: #fff;
}
.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-family: 'Fira Code', monospace;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}
.code-block .c-comment { color: var(--text-muted); font-style: italic; }
.code-block .c-keyword { color: var(--purple-code); }
.code-block .c-string { color: var(--yellow-code); }
.code-block .c-flag { color: var(--orange-code); }
.code-block .c-cmd { color: var(--pink); }
.code-block .c-output { color: var(--text-muted); }
.code-block .c-ip { color: var(--blue-code); }
.code-block .c-success { color: var(--green-terminal); }
.code-block .c-prompt { color: var(--pink); }

/* --- Terminal --- */
.terminal-section { margin-bottom: 64px; }
.terminal {
  background: #0c0c0c;
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}
.terminal__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  background: #161616;
  border-bottom: 1px solid #222;
}
.terminal__title {
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  color: var(--text-muted);
}
.terminal__body {
  padding: 20px;
  font-family: 'Fira Code', monospace;
  font-size: 12.5px;
  line-height: 1.8;
  min-height: 200px;
}
.terminal__body .t-green { color: var(--green-terminal); }
.terminal__body .t-pink { color: var(--pink); }
.terminal__body .t-grey { color: var(--text-muted); }
.terminal__body .t-white { color: var(--text-primary); }
.terminal__cursor {
  display: inline-block;
  width: 8px; height: 16px;
  background: var(--green-terminal);
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
  margin-left: 2px;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* --- Stats --- */
.stats-section {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 64px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  padding: 28px 24px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover {
  border-color: rgba(255,0,102,0.2);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}
.stat__number {
  font-family: 'Space Mono', monospace;
  font-size: 36px; font-weight: 700;
  color: var(--pink);
  margin-bottom: 4px;
}
.stat__label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Footer --- */
.footer {
  margin-left: var(--sidebar-w);
  border-top: 2px solid var(--pink);
  background: var(--bg-dark);
  padding: 40px 48px;
}
.footer {
  margin-left: var(--sidebar-w);
  border-top: 2px solid var(--pink);
  background: var(--bg-dark);
  padding: 32px 24px 40px;
  text-align: center;
}

.footer > img {
  display: inline-block;
  margin: 0 4px 12px;
  vertical-align: middle;
}

.footer__inner {
  max-width: 900px;
  margin: 0 auto;
  display: block;
  text-align: center;
}

.footer__inner > div {
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer__inner strong {
  color: var(--text-secondary);
  font-weight: 600;
}

.footer__links {
  margin: 12px 0 16px;
  font-size: 12px;
  color: var(--text-muted);
}

.footer__links a {
  color: var(--text-muted);
  margin: 0 6px;
}

.footer__links a:hover {
  color: var(--pink);
}

.footer__inner > a {
  display: inline-block;
  margin-top: 10px;
}

#center {
  margin: 14px auto 0 !important;
}/* ============================== */
/* BLOG POST LAYOUT               */
/* ============================== */
.blog-layout {
  padding-top: var(--navbar-h);
  min-height: 100vh;
}
.blog-layout .navbar { left: 0; }
.blog-container {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 32px 80px;
}
.blog-main {
  flex: 1;
  min-width: 0;
  padding-right: 48px;
}

/* Blog Article */
.blog-header { margin-bottom: 40px; padding-bottom: 28px; border-bottom: 1px solid var(--border-dark); }
.blog-header__back {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-muted);
  margin-bottom: 20px;
  transition: color var(--transition);
}
.blog-header__back:hover { color: var(--pink); }
.blog-header__title {
  font-family: 'Space Mono', monospace;
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.blog-header__meta {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: 12px; color: var(--text-muted);
}
.blog-header__meta span { display: flex; align-items: center; gap: 5px; }
.blog-header__tags { display: flex; gap: 6px; margin-top: 14px; flex-wrap: wrap; }
.blog-tag {
  font-family: 'Fira Code', monospace;
  font-size: 10.5px;
  padding: 3px 10px;
  background: var(--pink-subtle);
  border: 1px solid rgba(255,0,102,0.15);
  border-radius: 4px;
  color: var(--pink);
}

/* Blog Content */
.blog-content h2 {
  font-family: 'Space Mono', monospace;
  font-size: 20px; font-weight: 700;
  margin: 48px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-dark);
  letter-spacing: -0.3px;
}
.blog-content h2:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.blog-content h3 {
  font-size: 16px; font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-primary);
}
.blog-content p {
  font-size: 14.5px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.75;
}
.blog-content ul, .blog-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}
.blog-content li {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
  line-height: 1.65;
}
.blog-content li::marker { color: var(--pink); }
.blog-content strong { color: var(--text-primary); font-weight: 600; }
.blog-content blockquote {
  border-left: 3px solid var(--pink);
  padding: 12px 20px;
  margin: 20px 0;
  background: var(--pink-subtle);
  border-radius: 0 8px 8px 0;
  font-size: 14px;
  color: var(--text-secondary);
  font-style: italic;
}
.callout {
  padding: 16px 20px;
  border-radius: 10px;
  margin: 24px 0;
  font-size: 13.5px;
  line-height: 1.65;
  display: flex; gap: 12px;
}
.callout__icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.callout--info {
  background: rgba(102,187,255,0.06);
  border: 1px solid rgba(102,187,255,0.15);
  color: var(--blue-code);
}
.callout--warning {
  background: rgba(255,216,102,0.06);
  border: 1px solid rgba(255,216,102,0.15);
  color: var(--yellow-code);
}
.callout--danger {
  background: rgba(255,0,102,0.06);
  border: 1px solid rgba(255,0,102,0.15);
  color: var(--pink);
}
.blog-content .code-block { margin: 20px 0; }

/* --- Right TOC --- */
.toc-sidebar {
  width: var(--toc-w);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--navbar-h) + 40px);
  max-height: calc(100vh - var(--navbar-h) - 80px);
  overflow-y: auto;
  align-self: flex-start;
}
.toc {
  border-left: 1px solid var(--border-dark);
  padding-left: 16px;
}
.toc__title {
  font-family: 'Fira Code', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.toc a {
  display: block;
  padding: 5px 0;
  font-size: 12.5px;
  color: var(--text-muted);
  transition: all var(--transition);
  position: relative;
}
.toc a::before {
  content: '';
  position: absolute;
  left: -17px;
  top: 0; bottom: 0;
  width: 2px;
  background: var(--pink);
  opacity: 0;
  transition: opacity var(--transition);
}
.toc a:hover { color: var(--text-secondary); }
.toc a.active {
  color: var(--pink);
}
.toc a.active::before { opacity: 1; }
.toc a.toc--sub {
  padding-left: 14px;
  font-size: 11.5px;
}

/* --- Blog Footer --- */
.blog-footer {
  border-top: 2px solid var(--pink);
  background: var(--bg-dark);
  padding: 40px 32px;
  text-align: center;
}
.blog-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  font-size: 12px;
  color: var(--text-muted);
}

/* ============================== */
/* RESPONSIVE                      */
/* ============================== */
@media (max-width: 1024px) {
  .toc-sidebar { display: none; }
  .blog-main { padding-right: 0; }
  .stats-section { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }
  .sidebar {
    transform: translateX(-100%);
    width: 280px;
    transition: transform var(--transition);
  }
  .sidebar.mobile-open { transform: translateX(0); }
  .navbar { left: 0; }
  .footer { margin-left: 0; }
  .hamburger { display: flex; }
  .navbar__search { display: none; }
  .main__content { padding: 24px 20px 60px; }
  .card-grid { grid-template-columns: 1fr; }
  .stats-section { grid-template-columns: 1fr; }
  .hero__title { font-size: 28px; }
  .blog-container { padding: 24px 16px 60px; }
}
.mobile-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 105;
}
.mobile-overlay.active { display: block; }

/* --- Animations on scroll --- */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}