/* =============================================================
   ADELAIDE LITT - Tech Blog
   Design: Swiss Modernism 2.0 + Glassmorphism + 3D tilt
   Palette: #18181B / #3F3F46 / #EC4899 / #FAFAFA / #09090B
   Typography: Orbitron (heading) + Exo 2 (body)
   ============================================================= */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Exo 2', system-ui, -apple-system, sans-serif;
  background: #FAFAFA;
  color: #09090B;
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  min-height: 100vh;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
:focus-visible { outline: 2px solid #EC4899; outline-offset: 3px; border-radius: 4px; }
::selection { background: #EC4899; color: #FAFAFA; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #18181B;
}
h1 { font-size: clamp(2rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
.eyebrow {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #EC4899;
}

/* ---------- Color tokens ---------- */
:root {
  --color-primary: #18181B;
  --color-secondary: #3F3F46;
  --color-accent: #EC4899;
  --color-accent-glow: rgba(236, 72, 153, .35);
  --color-bg: #FAFAFA;
  --color-text: #09090B;
  --color-muted: #71717A;
  --color-line: rgba(24, 24, 27, .08);
  --color-glass: rgba(250, 250, 250, .65);
  --shadow-sm: 0 1px 2px rgba(24,24,27,.04), 0 2px 8px rgba(24,24,27,.06);
  --shadow-md: 0 4px 12px rgba(24,24,27,.08), 0 12px 32px rgba(24,24,27,.1);
  --shadow-glow: 0 0 0 1px var(--color-accent-glow), 0 12px 40px var(--color-accent-glow);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --container: 1280px;
  --duration: 240ms;
  --ease: cubic-bezier(.4, 0, .2, 1);
}

/* ---------- Container ---------- */
.container { max-width: var(--container); margin-inline: auto; padding-inline: 24px; }
@media (min-width: 768px) { .container { padding-inline: 40px; } }

/* ---------- Floating Navbar (Swiss style: floating, not stuck top:0) ---------- */
.navbar {
  position: fixed; top: 1rem; left: 1rem; right: 1rem; z-index: 50;
  background: var(--color-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: top var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.navbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'Orbitron', sans-serif; font-weight: 700; font-size: 1.05rem;
  color: var(--color-primary); letter-spacing: .02em;
}
.brand-mark {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, #18181B 0%, #EC4899 120%);
  display: grid; place-items: center;
  box-shadow: 0 4px 14px var(--color-accent-glow);
}
.brand-mark svg { width: 18px; height: 18px; }
.nav-menu { display: none; gap: 6px; list-style: none; }
.nav-menu a {
  padding: 8px 14px; border-radius: 999px;
  font-size: 0.9rem; font-weight: 500;
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
}
.nav-menu a:hover { background: rgba(24,24,27,.06); }
.nav-menu a.is-active { color: var(--color-accent); }
.nav-toggle {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px; border-radius: 10px;
  background: rgba(24,24,27,.05);
  transition: background var(--duration) var(--ease);
}
.nav-toggle:hover { background: rgba(24,24,27,.1); }
@media (min-width: 900px) {
  .nav-menu { display: inline-flex; }
  .nav-toggle { display: none; }
}

/* Push body content down to avoid navbar overlap */
.has-navbar { padding-top: 88px; }

/* ---------- Mobile drawer ---------- */
.drawer {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(24,24,27,.4);
  backdrop-filter: blur(6px);
  display: none;
}
.drawer.is-open { display: block; }
.drawer-panel {
  position: absolute; top: 1rem; left: 1rem; right: 1rem;
  background: var(--color-bg); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-md);
  animation: slideIn 220ms var(--ease);
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.drawer-list { list-style: none; margin-top: 16px; }
.drawer-list a {
  display: block; padding: 14px 12px; border-radius: 12px;
  font-family: 'Orbitron', sans-serif; font-weight: 500;
  border-bottom: 1px solid var(--color-line);
}
.drawer-list a:last-child { border-bottom: 0; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(48px, 9vw, 112px) 0 clamp(56px, 10vw, 120px);
  background:
    radial-gradient(60% 50% at 80% 20%, rgba(236,72,153,.12), transparent 60%),
    radial-gradient(40% 30% at 10% 80%, rgba(24,24,27,.06), transparent 60%),
    var(--color-bg);
}
.hero-grid {
  display: grid; gap: 48px;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 1024px) {
  .hero-grid { grid-template-columns: 1.1fr 1fr; gap: 64px; }
}
.hero-title {
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  letter-spacing: -0.03em;
  background: linear-gradient(120deg, #18181B 30%, #EC4899 120%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--color-muted); max-width: 56ch; margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px;
  font-family: 'Orbitron', sans-serif; font-weight: 600; font-size: 0.92rem;
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease), background var(--duration) var(--ease);
  will-change: transform;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--color-primary); color: var(--color-bg);
  box-shadow: 0 6px 20px rgba(24,24,27,.18);
}
.btn-primary:hover { background: #EC4899; box-shadow: var(--shadow-glow); }
.btn-ghost {
  background: rgba(24,24,27,.05); color: var(--color-primary);
  border: 1px solid var(--color-line);
}
.btn-ghost:hover { background: rgba(24,24,27,.08); }

/* ---------- 3D scene (hero illustration) ---------- */
.scene-3d {
  position: relative; aspect-ratio: 1 / 1;
  display: grid; place-items: center;
  perspective: 1200px;
}
.orbit {
  position: relative;
  width: min(100%, 420px); aspect-ratio: 1 / 1;
  transform-style: preserve-3d;
  animation: rotateOrbit 22s linear infinite;
}
@keyframes rotateOrbit { to { transform: rotateY(360deg); } }
.orbit-card {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255,255,255,.92), rgba(255,255,255,.7));
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(12px);
  font-family: 'Orbitron', sans-serif; font-weight: 700;
  color: var(--color-primary); font-size: 1.1rem;
  text-align: center; padding: 20px;
  backface-visibility: hidden;
  transition: transform var(--duration) var(--ease);
}
.orbit-card-icon {
  width: 56px; height: 56px; border-radius: 16px;
  display: grid; place-items: center; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(236,72,153,.22), rgba(236,72,153,.06));
}
.orbit-card-icon svg { width: 28px; height: 28px; color: var(--color-accent); }
.orbit-card.c1 { transform: rotateY(0deg) translateZ(180px); }
.orbit-card.c2 { transform: rotateY(72deg) translateZ(180px); }
.orbit-card.c3 { transform: rotateY(144deg) translateZ(180px); }
.orbit-card.c4 { transform: rotateY(216deg) translateZ(180px); }
.orbit-card.c5 { transform: rotateY(288deg) translateZ(180px); }

@media (prefers-reduced-motion: reduce) {
  .orbit { animation: none; }
}

/* ---------- Section ---------- */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 36px; flex-wrap: wrap; }
.section-title { margin: 0; }
.section-sub { color: var(--color-muted); margin-top: 6px; max-width: 60ch; }
.section-link { font-family: 'Orbitron', sans-serif; font-weight: 600; font-size: 0.85rem; color: var(--color-accent); transition: opacity var(--duration) var(--ease); }
.section-link:hover { opacity: 0.7; }

/* ---------- Bento Grid (Features / Categories) ---------- */
.bento {
  display: grid; gap: 20px;
  grid-template-columns: repeat(1, 1fr);
}
@media (min-width: 640px) { .bento { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .bento { grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(180px, auto); } }
.bento-item {
  position: relative; overflow: hidden;
  padding: 28px; border-radius: var(--radius);
  background: rgba(255,255,255,.7);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
  transform-style: preserve-3d;
}
.bento-item:hover {
  transform: translateY(-4px) rotateX(2deg) rotateY(-2deg);
  box-shadow: var(--shadow-md);
}
.bento-item.is-feature {
  grid-column: span 1; grid-row: span 2;
  background: linear-gradient(135deg, #18181B, #3F3F46);
  color: var(--color-bg);
}
.bento-item.is-feature h3, .bento-item.is-feature .eyebrow { color: var(--color-bg); }
.bento-item.is-feature .eyebrow { color: var(--color-accent); }
.bento-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(236,72,153,.18), rgba(236,72,153,.04));
  margin-bottom: 16px;
}
.bento-item.is-feature .bento-icon { background: rgba(236,72,153,.2); }
.bento-item.is-feature .bento-icon svg { color: var(--color-accent); }
.bento-icon svg { width: 22px; height: 22px; color: var(--color-accent); }

/* ---------- Card grid (article cards) ---------- */
.cards {
  display: grid; gap: 24px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card {
  position: relative; overflow: hidden;
  background: rgba(255,255,255,.7);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
  transform-style: preserve-3d;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card-media {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #18181B, #3F3F46);
  position: relative; overflow: hidden;
}
.card-media::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(236,72,153,.25), transparent 60%);
}
.card-media-tag {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  font-family: 'Orbitron', sans-serif; font-size: 0.7rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px;
  background: rgba(255,255,255,.92); color: var(--color-primary);
  backdrop-filter: blur(8px);
}
.card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; gap: 12px; }
.card-title {
  font-size: 1.2rem; line-height: 1.3;
  transition: color var(--duration) var(--ease);
}
.card:hover .card-title { color: var(--color-accent); }
.card-excerpt { color: var(--color-muted); font-size: 0.95rem; line-height: 1.6; }
.card-meta {
  margin-top: auto;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding-top: 14px; border-top: 1px solid var(--color-line);
  font-size: 0.8rem; color: var(--color-muted);
}
.card-meta-author { display: inline-flex; align-items: center; gap: 8px; }

/* ---------- Article (single) ---------- */
.article { max-width: 760px; margin-inline: auto; padding: clamp(40px, 6vw, 80px) 0; }
.article-hero { aspect-ratio: 21 / 9; border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 36px;
  background: linear-gradient(135deg, #18181B, #3F3F46);
  position: relative;
}
.article-hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(60% 60% at 50% 30%, rgba(236,72,153,.3), transparent 70%);
}
.article-meta { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; color: var(--color-muted); font-size: 0.9rem; }
.article-meta .pill { background: rgba(236,72,153,.12); color: var(--color-accent); padding: 4px 12px; border-radius: 999px; font-family: 'Orbitron', sans-serif; font-size: 0.72rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.article-title { margin: 12px 0 20px; }
.article-body { font-size: 1.075rem; line-height: 1.8; }
.article-body p, .article-body ul, .article-body ol, .article-body blockquote { margin-bottom: 22px; }
.article-body h2 { margin-top: 40px; margin-bottom: 16px; }
.article-body h3 { margin-top: 30px; margin-bottom: 12px; }
.article-body a { color: var(--color-accent); border-bottom: 1px solid currentColor; transition: opacity var(--duration) var(--ease); }
.article-body a:hover { opacity: 0.7; }
.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 8px 18px; color: var(--color-secondary);
  font-style: italic; background: rgba(236,72,153,.04);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.article-body code { font-family: 'JetBrains Mono', ui-monospace, monospace; background: rgba(24,24,27,.06); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.article-body pre { background: #18181B; color: #FAFAFA; padding: 20px; border-radius: var(--radius-sm); overflow-x: auto; margin-bottom: 22px; }
.article-body pre code { background: transparent; color: inherit; padding: 0; }

/* Table of contents */
.toc {
  margin: 24px 0 36px; padding: 20px 24px;
  background: rgba(255,255,255,.7); border: 1px solid var(--color-line);
  border-radius: var(--radius);
}
.toc-title { margin-bottom: 10px; }
.toc-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.toc-list a { display: inline-flex; padding: 6px 10px; border-radius: 8px; transition: background var(--duration) var(--ease); font-size: 0.95rem; }
.toc-list a:hover { background: rgba(24,24,27,.06); color: var(--color-accent); }

/* ---------- Sidebar (category / archive page) ---------- */
.layout-with-aside { display: grid; gap: 32px; grid-template-columns: 1fr; }
@media (min-width: 1024px) { .layout-with-aside { grid-template-columns: 1fr 320px; } }
.widget {
  background: rgba(255,255,255,.7); border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: 22px;
  margin-bottom: 20px;
}
.widget-title {
  font-family: 'Orbitron', sans-serif; font-size: 0.95rem; font-weight: 700;
  margin-bottom: 14px; letter-spacing: .04em;
}
.widget-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }
.widget-list a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; border-radius: 10px;
  font-size: 0.92rem;
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
}
.widget-list a:hover { background: rgba(236,72,153,.08); color: var(--color-accent); }
.widget-list a span { font-family: 'Orbitron', sans-serif; font-size: 0.78rem; color: var(--color-muted); }

/* ---------- Pagination ---------- */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; flex-wrap: wrap; }
.pagination a, .pagination span {
  display: inline-grid; place-items: center;
  min-width: 44px; height: 44px; padding: 0 14px; border-radius: 12px;
  font-family: 'Orbitron', sans-serif; font-weight: 600; font-size: 0.92rem;
  border: 1px solid var(--color-line); background: rgba(255,255,255,.7);
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease), transform var(--duration) var(--ease);
}
.pagination a:hover { background: var(--color-primary); color: var(--color-bg); transform: translateY(-1px); }
.pagination .is-current { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }

/* ---------- Footer ---------- */
.footer {
  margin-top: 64px;
  background: #18181B; color: #FAFAFA;
  padding: 56px 0 28px;
}
.footer-grid { display: grid; gap: 32px; grid-template-columns: 1fr; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 1.4fr repeat(3, 1fr); } }
.footer h4 { color: #FAFAFA; font-size: 0.92rem; margin-bottom: 14px; }
.footer ul { list-style: none; display: flex; flex-direction: column; gap: 8px; font-size: 0.92rem; opacity: 0.8; }
.footer ul a:hover { color: var(--color-accent); opacity: 1; }
.footer-bottom {
  margin-top: 36px; padding-top: 20px;
  border-top: 1px solid rgba(250,250,250,.1);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 0.85rem; opacity: 0.7;
}
.footer-tagline { font-family: 'Orbitron', sans-serif; font-weight: 600; color: var(--color-accent); letter-spacing: .08em; font-size: 0.92rem; }

/* ---------- Utility ---------- */
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.grid-2 { display: grid; gap: 20px; grid-template-columns: repeat(1, 1fr); }
@media (min-width: 640px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } }
.scroll-fade { opacity: 0; transform: translateY(20px); transition: opacity 600ms var(--ease), transform 600ms var(--ease); }
.scroll-fade.is-visible { opacity: 1; transform: translateY(0); }