* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.9), transparent 28%),
    var(--bg);
  line-height: 1.7;
}

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

img {
  max-width: 100%;
}

.site-shell {
  min-height: 100vh;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.nav-link {
  display: inline-block;
  padding: 0.55rem 0.9rem;
  color: inherit;
  text-decoration: none;
  font-weight: 750;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.22);
  transition: 0.18s ease;
}

.nav-link:hover,
.nav-link.active {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.profile-image {
  width: 155px;
  height: 155px;
  object-fit: cover;
  border-radius: 999px;
  background: white;
  border: 5px solid rgba(255, 255, 255, 0.74);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.22);
}

.hero-illustration {
  width: min(100%, 390px);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.16);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.18);
}

.eyebrow {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-size: 0.78rem;
  font-weight: 850;
  opacity: 0.86;
}

.tagline {
  margin: 1rem 0 0;
  max-width: 740px;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  opacity: 0.95;
}

.card {
  background: var(--surface);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: clamp(1.35rem, 4vw, 2.4rem);
  box-shadow: 0 22px 50px var(--shadow);
}

.markdown-body {
  font-size: 1.05rem;
}

.markdown-body h1 {
  margin-top: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.markdown-body h2 {
  margin-top: 2rem;
  font-size: 1.55rem;
}

.markdown-body h3 {
  margin-top: 1.6rem;
  font-size: 1.22rem;
}

.markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid var(--card-border);
}

.markdown-body blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: 5px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-radius: 12px;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.3rem 0;
  overflow: hidden;
  border-radius: 14px;
}

.markdown-body th,
.markdown-body td {
  padding: 0.8rem;
  border: 1px solid var(--card-border);
  text-align: left;
}

.markdown-body th {
  background: color-mix(in srgb, var(--accent) 12%, white);
}

.footer {
  color: var(--muted);
  text-align: center;
  padding: 2rem 1rem 3rem;
}

/* -----------------------------------
   Layout 1: Classic
----------------------------------- */

.layout-classic .hero {
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.24), transparent 28%),
    linear-gradient(135deg, var(--hero-1), var(--hero-2));
  color: white;
  padding: 2.75rem 1.25rem 3.25rem;
}

.layout-classic .hero-inner {
  max-width: 1150px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.75fr);
  gap: 2.5rem;
  align-items: center;
}

.layout-classic h1.site-title {
  margin: 0;
  font-size: clamp(2.35rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.055em;
}

.layout-classic .hero-media {
  display: grid;
  gap: 1rem;
  justify-items: center;
}

.layout-classic .container {
  width: min(1000px, 92%);
  margin: -1.5rem auto 2.75rem;
}

/* -----------------------------------
   Layout 2: Sidebar
----------------------------------- */

.layout-sidebar {
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
  min-height: 100vh;
}

.layout-sidebar .sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  min-height: 100vh;
  padding: 2rem;
  background: linear-gradient(160deg, var(--hero-1), var(--hero-2));
  color: white;
}

.layout-sidebar .sidebar h1 {
  margin: 1rem 0 0;
  font-size: 2rem;
  letter-spacing: -0.04em;
}

.layout-sidebar .sidebar .nav {
  margin-top: 1.5rem;
  display: grid;
}

.layout-sidebar .main-panel {
  padding: 3rem min(4vw, 3rem);
}

.layout-sidebar .content-wrap {
  max-width: 1500px;
}

/* -----------------------------------
   Layout 3: Split
----------------------------------- */

.layout-split .split-hero {
  min-height: 32vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  background: linear-gradient(135deg, var(--hero-1), var(--hero-2));
  color: white;
}

.layout-split .split-text {
  padding: clamp(2rem, 7vw, 5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.layout-split .split-text h1 {
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 5rem);
  letter-spacing: -0.06em;
  line-height: 1;
}

.layout-split .split-media {
  display: grid;
  place-items: center;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.08);
}

.layout-split .split-media-inner {
  display: grid;
  gap: 1rem;
  justify-items: center;
}

.layout-split .container {
  width: min(1000px, 92%);
  margin: 2.5rem auto;
}

/* -----------------------------------
   Layout 4: Lab
----------------------------------- */

.layout-lab .lab-hero {
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.92), rgba(37, 99, 235, 0.9)),
    var(--hero-1);
  color: white;
  padding: 4rem 1.25rem;
}

.layout-lab .lab-hero-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: 3rem;
  align-items: center;
}

.layout-lab .lab-title {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  line-height: 1;
  letter-spacing: -0.065em;
}

.layout-lab .lab-badge {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  font-weight: 800;
}

.layout-lab .lab-content {
  width: min(1100px, 92%);
  margin: -2rem auto 2.75rem;
}

/* -----------------------------------
   Layout 5: Minimal
----------------------------------- */

.layout-minimal .minimal-header {
  width: min(850px, 92%);
  margin: 0 auto;
  padding: 2rem 0 1.2rem;
  border-bottom: 1px solid var(--card-border);
}

.layout-minimal .minimal-header h1 {
  margin: 0;
  font-size: 1.8rem;
  letter-spacing: -0.04em;
}

.layout-minimal .minimal-header .tagline {
  color: var(--muted);
  font-size: 1rem;
}

.layout-minimal .minimal-header .nav {
  margin-top: 1.2rem;
}

.layout-minimal .minimal-header .nav-link {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--card-border);
}

.layout-minimal .minimal-main {
  width: min(850px, 92%);
  margin: 2.5rem auto;
}

.layout-minimal .card {
  box-shadow: none;
}

/* -----------------------------------
   Layout 6: Cards
----------------------------------- */

.layout-cards .cards-hero {
  padding: 3rem 1.25rem;
  background: linear-gradient(135deg, var(--hero-1), var(--hero-2));
  color: white;
}

.layout-cards .cards-hero-inner {
  width: min(1100px, 92%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 2rem;
  align-items: center;
}

.layout-cards .cards-hero h1 {
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4rem);
  letter-spacing: -0.055em;
}

.layout-cards .cards-main {
  width: min(1100px, 92%);
  margin: 2rem auto;
}

.layout-cards .content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.2rem;
}

/* -----------------------------------
   Responsive
----------------------------------- */

@media (max-width: 900px) {
  .layout-classic .hero-inner,
  .layout-lab .lab-hero-inner,
  .layout-cards .cards-hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .layout-classic .nav,
  .layout-lab .nav,
  .layout-cards .nav {
    justify-content: center;
  }

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

  .layout-sidebar .sidebar {
    position: static;
    min-height: auto;
    text-align: center;
  }

  .layout-sidebar .sidebar .nav {
    justify-items: center;
  }

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

  .layout-split .split-text {
    text-align: center;
  }

  .layout-split .nav {
    justify-content: center;
  }
}