.site-header { position: sticky; z-index: 50; top: 0; height: var(--header-height); margin-bottom: calc(-1 * var(--header-height)); background: color-mix(in srgb, var(--canvas) 77%, transparent); border-bottom: 1px solid transparent; backdrop-filter: blur(15px) saturate(1.3); -webkit-backdrop-filter: blur(15px) saturate(1.3); transition: background .25s ease, border-color .25s ease; }
.site-header.is-scrolled { background: color-mix(in srgb, var(--canvas) 92%, transparent); border-color: var(--line); }
.site-header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1.7rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; flex: 0 0 auto; }
.brand-mark, .footer-brand { color: var(--ink); font: 700 1.18rem/1 var(--font-display); letter-spacing: -.1em; }
.brand-mark span, .footer-brand span { color: var(--signal); }
.brand-copy { display: flex; flex-direction: column; gap: .08rem; }
.brand-copy strong { font: 600 .68rem/1.2 var(--font-body); letter-spacing: .015em; }
.brand-copy small { color: var(--muted); font: .54rem/1.2 var(--font-mono); letter-spacing: .015em; }
.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.3rem); }
.site-nav a, .resume-button, .theme-toggle, .menu-toggle { font: 500 .62rem/1 var(--font-mono); letter-spacing: .04em; text-transform: uppercase; }
.site-nav a { position: relative; padding: .7rem 0; color: var(--muted); transition: color .2s ease; }
.site-nav a::after { position: absolute; content: ''; left: 0; bottom: .25rem; height: 1px; width: 100%; background: var(--signal); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.site-nav a:hover, .site-nav a.is-active { color: var(--ink); }
.site-nav a:hover::after, .site-nav a.is-active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: .65rem; }
.theme-toggle { display: grid; place-items: center; width: 2.4rem; height: 2.4rem; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: transparent; transition: color .2s ease, border-color .2s ease, transform .2s ease; }
.theme-toggle:hover { color: var(--signal); border-color: var(--signal); transform: rotate(-10deg); }
.theme-icon { width: 1rem; height: 1rem; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
[data-theme='dark'] .theme-icon-sun, [data-theme='light'] .theme-icon-moon { display: block; }
[data-theme='dark'] .theme-icon-moon, [data-theme='light'] .theme-icon-sun { display: none; }
.resume-button { display: inline-flex; align-items: center; gap: .5rem; min-height: 2.5rem; padding: 0 .9rem; background: var(--signal); color: #0a1020; transition: background .2s ease, transform .2s ease; white-space: nowrap; }
.resume-button:hover { background: var(--signal-strong); transform: translateY(-2px); }
.menu-toggle { display: none; border: 0; background: none; padding: .7rem 0; }
.menu-toggle-icon, .menu-toggle-icon::before, .menu-toggle-icon::after { display: block; width: 1rem; height: 1px; background: currentColor; transition: transform .2s ease; }
.menu-toggle-icon { position: relative; margin-left: .5rem; }
.menu-toggle-icon::before, .menu-toggle-icon::after { position: absolute; content: ''; left: 0; }
.menu-toggle-icon::before { top: -.3rem; }
.menu-toggle-icon::after { top: .3rem; }
.menu-toggle[aria-expanded='true'] .menu-toggle-icon { background: transparent; }
.menu-toggle[aria-expanded='true'] .menu-toggle-icon::before { top: 0; transform: rotate(45deg); }
.menu-toggle[aria-expanded='true'] .menu-toggle-icon::after { top: 0; transform: rotate(-45deg); }
.text-link { display: inline-flex; align-items: center; gap: .75rem; width: fit-content; border-bottom: 1px solid color-mix(in srgb, currentColor 40%, transparent); padding-bottom: .35rem; font: 500 .66rem/1.4 var(--font-mono); letter-spacing: .035em; text-transform: uppercase; transition: color .2s ease, border-color .2s ease; }
.text-link:hover { color: var(--signal); border-color: var(--signal); }
.text-link span { font-size: .95rem; line-height: .7; }
.text-link-dark:hover { color: var(--signal-dark); border-color: var(--signal-dark); }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-bottom: 1.1rem; border-bottom: 1px solid var(--line-dark); }
.section-heading .eyebrow { color: var(--paper-ink); }
.section-aside { color: color-mix(in srgb, var(--paper-ink) 52%, transparent); font: .57rem/1.4 var(--font-mono); letter-spacing: .06em; text-align: right; }
.section-heading-dark { border-color: var(--line); }
.section-heading-dark .eyebrow { color: var(--ink); }
.section-heading-dark .section-aside { color: var(--muted); }
.site-footer { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1.4rem; padding-top: 1.25rem; padding-bottom: 1.45rem; color: var(--muted); font: .59rem/1.5 var(--font-mono); letter-spacing: .02em; }
.footer-brand { color: var(--ink); font-size: .95rem; }
.site-footer > p { text-align: center; }
.footer-dot { padding: 0 .3rem; color: var(--signal); }
.footer-links { display: flex; align-items: center; gap: 1rem; }
.footer-links a:hover { color: var(--ink); }
@media (max-width: 900px) { .site-header-inner { gap: 1rem; }.site-nav { gap: 1.15rem; }.brand-copy small { display: none; } }
@media (max-width: 720px) {
  .site-header { background: color-mix(in srgb, var(--canvas) 94%, transparent); }
  .site-header-inner { justify-content: flex-start; }
  .brand { margin-right: auto; }
  .menu-toggle { display: inline-flex; align-items: center; }
  .header-actions { gap: .4rem; }
  .theme-toggle { width: 2.2rem; height: 2.2rem; }
  .resume-button { min-height: 2.2rem; padding-inline: .65rem; font-size: .56rem; }
  .site-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: .55rem var(--gutter, 18px) .9rem; background: var(--canvas); border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .85rem 0; border-bottom: 1px solid var(--line); }
  .site-nav a::after { display: none; }
  .site-footer { grid-template-columns: auto 1fr; row-gap: .3rem; }
  .site-footer > p { text-align: right; }
  .footer-links { grid-column: 1 / -1; justify-content: space-between; border-top: 1px solid var(--line); padding-top: .7rem; margin-top: .35rem; }
}
@media (max-width: 420px) { .brand { gap: .55rem; }.brand-copy strong { font-size: .63rem; }.site-nav { padding-inline: 14px; }.section-aside { max-width: 42%; font-size: .5rem; }.section-heading { align-items: flex-end; } }