/* =========================================================
   LAYOUT — header, hero, sections, grids, footer
   ========================================================= */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header.is-scrolled {
  background: var(--header-bg);
  border-bottom-color: var(--border);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--heading);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--heading); }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
}
.brand-name { font-family: var(--font-mono); font-size: 0.95rem; font-weight: 500; }

.nav { margin-left: auto; }
.nav-list {
  list-style: none;
  display: flex;
  gap: 4px;
}
.nav-list a {
  display: block;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-list a:hover,
.nav-list a.is-active { color: var(--heading); background: var(--surface); }

.header-actions { display: flex; align-items: center; gap: 6px; }
.header-actions .nav-toggle { display: none; }

@media (max-width: 760px) {
  .brand-name { display: none; }
  .header-actions .nav-toggle { display: inline-grid; }
  .header-actions { margin-left: auto; }
  .nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    margin: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px var(--gutter) 20px;
    display: none;
  }
  .nav.is-open { display: block; }
  .nav-list { flex-direction: column; }
  .nav-list a { padding: 14px 12px; border-radius: var(--radius-sm); font-size: 1.05rem; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc(100svh - var(--header-h));
  display: flex;
  align-items: center;
  margin-top: calc(var(--header-h) * -1);
  padding: calc(var(--header-h) + 64px) 0 96px;
  overflow: hidden;
  isolation: isolate;
}
/* Faint grid + accent glow behind the hero text */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
}
.hero::after {
  content: "";
  position: absolute;
  z-index: -3;
  width: 900px;
  height: 900px;
  right: -300px;
  top: -350px;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.16), transparent 60%);
  pointer-events: none;
}
.hero-dither {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
  /* Keep the pattern to the top-right, away from the text */
  -webkit-mask-image: radial-gradient(ellipse 65% 75% at 100% 0%, #000 20%, transparent 80%);
  mask-image: radial-gradient(ellipse 65% 75% at 100% 0%, #000 20%, transparent 80%);
}
.hero-inner { position: relative; }

.hero-title {
  font-size: var(--fs-hero);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.02;
  max-width: 20ch;
  margin-bottom: 28px;
}
.hero-lede {
  max-width: 60ch;
  font-size: clamp(1.05rem, 0.6vw + 0.95rem, 1.25rem);
  color: var(--text-muted);
  margin-bottom: 40px;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 48px;
  margin: 72px 0 0;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  max-width: 640px;
}
.hero-stats dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}
.hero-stats dd { margin: 4px 0 0; color: var(--heading); font-weight: 600; }

/* ---------- Sections ---------- */
.section { padding-block: var(--section-pad); }
.section-alt { background: var(--bg-alt); }
.loop-section {
  padding-block: 28px;
  border-block: 1px solid var(--border);
}

.section-head { max-width: 720px; margin-bottom: 48px; position: relative; }
.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 14px;
}
.section-sub { color: var(--text-muted); font-size: 1.1rem; margin: 0; }

/* ---------- Grids ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: start;
  grid-auto-flow: row dense;
}
.skill-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 56px;
}
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}

@media (max-width: 1000px) {
  .project-grid, .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .skill-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
  .project-grid, .post-grid, .skill-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 16px 32px; margin-top: 48px; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 36px;
  color: var(--text-muted);
  font-size: var(--fs-small);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-inner p { margin: 0; }
.back-to-top { color: var(--text-muted); }