.site-header { --header-ink: var(--text); --header-muted: color-mix(in srgb, var(--header-ink) 76%, transparent); --header-panel: color-mix(in srgb, var(--surface) 94%, transparent); position: sticky; z-index: 80; top: 0; border-bottom: 1px solid color-mix(in srgb, var(--header-ink) 16%, transparent); color: var(--header-ink); background: var(--header-panel); box-shadow: 0 8px 28px color-mix(in srgb, var(--text) 7%, transparent); backdrop-filter: blur(18px); }
.site-header[data-surface="dark"] { --header-ink: #f8fbff; --header-muted: color-mix(in srgb, white 76%, transparent); --header-panel: #091426; border-bottom-color: color-mix(in srgb, var(--accent) 60%, transparent); }
.site-header[data-surface="light"] { --header-ink: var(--text); --header-panel: color-mix(in srgb, var(--surface) 96%, white); }
.site-header[data-surface="gradient"] { --header-ink: #fff; --header-muted: color-mix(in srgb, white 82%, transparent); --header-panel: linear-gradient(105deg, color-mix(in srgb, var(--primary) 88%, #071426), var(--primary) 54%, var(--accent)); }
.site-header[data-surface="brand"] { --header-panel: var(--primary); }
.site-header[data-surface="brand"][data-text="light"] { --header-ink: #fff; --header-muted: color-mix(in srgb, white 82%, transparent); }
.site-header[data-surface="glass"] { --header-panel: color-mix(in srgb, var(--surface) 78%, transparent); }
.site-header[data-surface="warm"] { --header-panel: linear-gradient(100deg, #fff9ee, color-mix(in srgb, var(--accent) 10%, #fffdf8)); }
.header-inner { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: clamp(14px, 2vw, 30px); width: min(1320px, calc(100% - 36px)); min-height: 76px; margin: 0 auto; }
.site-header[data-layout="wide"] .header-inner { width: min(1440px, calc(100% - 32px)); min-height: 82px; }
.site-header[data-layout="compact"] .header-inner { min-height: 66px; gap: clamp(10px, 1.4vw, 21px); }
.site-header[data-layout="floating"] { border-bottom: 0; background: transparent; box-shadow: none; }
.site-header[data-layout="floating"] .header-inner { width: min(1340px, calc(100% - 32px)); margin-top: 10px; padding: 0 18px; border: 1px solid color-mix(in srgb, var(--header-ink) 15%, transparent); border-radius: calc(var(--radius) + 8px); background: var(--header-panel); box-shadow: 0 14px 38px color-mix(in srgb, var(--text) 14%, transparent); }
.brand { display: inline-flex; align-items: center; min-width: 0; white-space: nowrap; }
.brand-desktop { display: block; width: clamp(158px, 15vw, 222px); line-height: 0; }
.brand-wordmark { display: block; width: 100%; max-width: 222px; height: 52px; object-fit: contain; object-position: left center; filter: drop-shadow(0 3px 4px color-mix(in srgb, black 28%, transparent)); }
.brand-wordmark--manual { width: auto; max-width: 222px; }
.brand-mobile { display: none; align-items: center; gap: 8px; }
.brand-mark { flex: 0 0 38px; width: 38px; height: 38px; }
.brand-short { max-width: 104px; overflow: hidden; font-size: 16px; font-weight: 900; letter-spacing: -.025em; text-overflow: ellipsis; }
.site-nav { display: flex; min-width: 0; align-items: center; justify-content: center; gap: clamp(7px, .95vw, 15px); }
.site-nav a { position: relative; flex: 0 0 auto; padding: 25px 1px 22px; color: var(--header-muted); font-size: clamp(12px, .9vw, 14px); font-weight: 760; line-height: 1.2; white-space: nowrap; }
.site-nav a::after { position: absolute; right: 0; bottom: 15px; left: 0; height: 2px; content: ""; border-radius: 2px; background: var(--accent); transform: scaleX(0); transition: transform .2s ease; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--header-ink); }
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); }
.site-header[data-active="top-line"] .site-nav a::after { top: 0; bottom: auto; height: 3px; }
.site-header[data-active="soft-block"] .site-nav a[aria-current="page"], .site-header[data-active="pill"] .site-nav a[aria-current="page"] { padding-right: 11px; padding-left: 11px; color: var(--header-ink); background: color-mix(in srgb, var(--accent) 16%, transparent); }
.site-header[data-active="soft-block"] .site-nav a[aria-current="page"] { border-radius: 8px; }
.site-header[data-active="pill"] .site-nav a[aria-current="page"] { border: 1px solid color-mix(in srgb, var(--accent) 58%, transparent); border-radius: 999px; }
.site-header[data-active="soft-block"] .site-nav a[aria-current="page"]::after, .site-header[data-active="pill"] .site-nav a[aria-current="page"]::after { display: none; }
.auth-actions { display: flex; flex: 0 0 auto; align-items: center; gap: 9px; }
.auth-button { display: inline-grid; min-width: 88px; min-height: 40px; place-items: center; padding: 8px 15px; border: 1px solid color-mix(in srgb, var(--header-ink) 38%, transparent); border-radius: 10px; color: var(--header-ink); font-size: 13px; font-weight: 850; line-height: 1; white-space: nowrap; transition: transform .18s ease, box-shadow .18s ease; }
.auth-button:hover { transform: translateY(-1px); }
.auth-register { border-color: var(--accent); color: #101827; background: var(--accent); box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 28%, transparent); }
.site-header[data-cta="metallic"] .auth-register { border-color: #f0c44e; background: linear-gradient(#ffe47e, #e7ad1d); box-shadow: inset 0 1px white, 0 8px 22px color-mix(in srgb, #d89b12 34%, transparent); }
.site-header[data-cta="contrast-solid"] .auth-register { border-color: #fff; background: #fff; }
.site-header[data-cta="glass-solid"] .auth-login { background: color-mix(in srgb, var(--surface) 28%, transparent); backdrop-filter: blur(8px); }
.nav-toggle { display: none; width: 44px; height: 42px; padding: 9px; border: 1px solid color-mix(in srgb, var(--header-ink) 28%, transparent); border-radius: 11px; color: var(--header-ink); background: color-mix(in srgb, var(--header-ink) 10%, transparent); cursor: pointer; }
.nav-toggle span { display: block; width: 100%; height: 3px; margin: 4px 0; border-radius: 2px; background: var(--accent); transition: transform .2s ease, opacity .2s ease; }
.site-header.menu-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
.site-header.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.source-frame { display: block; min-width: 0; }