/* ===========================================
   LAYOUT — header, footer, mobile nav
   =========================================== */

.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; padding: 1.5rem 0; transition: background var(--transition), padding var(--transition); }
.site-header.scrolled { background: rgba(8,8,8,0.95); backdrop-filter: blur(10px); padding: 1rem 0; }
.site-header__inner { max-width: var(--container); margin-inline: auto; padding-inline: clamp(1.5rem, 5vw, 4rem); display: flex; align-items: center; justify-content: space-between; }
.site-logo { font-family: var(--font-serif); font-size: 1.1rem; font-style: italic; letter-spacing: 0.05em; color: var(--white); position: relative; z-index: 200; }
.site-nav__list { display: flex; gap: 2.5rem; }
.site-nav__list a { font-size: 0.72rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-dim); transition: color 0.3s; }
.site-nav__list a:hover, .site-nav__list .current-menu-item > a { color: var(--white); }

.site-footer { background: var(--surface); border-top: 1px solid var(--surface-2); padding: 3.5rem 0 2rem; }
.site-footer__inner { max-width: var(--container); margin-inline: auto; padding-inline: clamp(1.5rem, 5vw, 4rem); display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .site-footer__inner { grid-template-columns: 1fr auto; grid-template-rows: auto auto; align-items: start; } .site-footer__copy { grid-column: 1 / -1; } }
.site-footer__logo { font-family: var(--font-serif); font-size: 1.1rem; font-style: italic; color: var(--white); display: block; margin-bottom: 0.4rem; }
.site-footer__tagline { font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-dim); }
.site-footer__nav { display: flex; flex-wrap: wrap; gap: 0.75rem 2rem; align-items: flex-start; }
.site-footer__nav a { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dim); transition: color 0.3s; }
.site-footer__nav a:hover { color: var(--white); }
.site-footer__copy { font-size: 0.75rem; color: var(--text-dim); border-top: 1px solid var(--surface-2); padding-top: 1.5rem; margin-top: 0.5rem; }
.site-footer__version { margin-left: 1rem; font-size: 0.65rem; letter-spacing: 0.1em; color: var(--text-dim); }

.site-nav__toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; z-index: 200; position: relative; }
.site-nav__toggle span { display: block; width: 22px; height: 1px; background: var(--white); transition: transform 0.3s ease, opacity 0.3s ease; transform-origin: center; }
.site-nav__toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-nav__toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.site-nav__toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 767px) {
    .site-nav__toggle { display: flex; }
    .site-nav { display: none; position: fixed; inset: 0; background: var(--bg); z-index: 150; }
    .site-nav.open { display: flex; }
    .site-nav__list { flex-direction: column; justify-content: center; align-items: center; gap: 2rem; width: 100%; height: 100%; }
    .site-nav__list a { font-size: 1.1rem; letter-spacing: 0.2em; }
}