.vt-header{position:sticky;top:0;z-index:40}
.vt-header__inner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-6);height:var(--header-height)}
.vt-header__brand{display:inline-flex;align-items:center;gap:var(--space-3);padding:0.35rem 0;border-radius:var(--radius-pill)}
.vt-header__brand-mark{width:32px;height:32px;border-radius:999px;background:radial-gradient(circle at 30% 30%,#fff,rgba(255,255,255,0.18)),radial-gradient(circle at 70% 80%,var(--color-primary-strong),var(--color-copper));box-shadow:0 0 0 1px rgba(245,241,232,0.75),0 0 18px rgba(197,122,69,0.7)}
.vt-header__brand-text{display:flex;flex-direction:column;line-height:1.2}
.vt-header__brand-title{font-family:var(--font-serif);font-size:var(--font-size-lg);letter-spacing:0.14em;text-transform:uppercase}
.vt-header__brand-subtitle{font-size:var(--font-size-xs);letter-spacing:0.24em;text-transform:uppercase;color:var(--color-text-muted)}
.vt-header__nav{display:flex;align-items:center}
.vt-header__nav-list{display:flex;align-items:center;gap:var(--space-4)}
.vt-header__nav-link{position:relative;font-size:var(--font-size-sm);letter-spacing:0.16em;text-transform:uppercase;color:var(--color-text-muted);padding:0.25rem 0}
.vt-header__nav-link::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;background:linear-gradient(90deg,var(--color-primary-strong),var(--color-copper));transition:width var(--transition-normal)}
.vt-header__nav-link:hover::after{width:100%}
.vt-header__nav-link:hover{color:var(--color-primary-strong)}
.vt-header__cta{display:flex;align-items:center;gap:var(--space-2)}
.vt-header__btn{white-space:nowrap}
.vt-header__toggle{display:none;flex-direction:column;justify-content:center;align-items:center;gap:6px;width:40px;height:40px;border-radius:999px;border:1px solid var(--color-border-subtle);background:rgba(10,10,12,0.94);cursor:pointer}
.vt-header__toggle-bar{width:18px;height:1.5px;border-radius:999px;background:var(--color-text);transition:transform var(--transition-fast),opacity var(--transition-fast)}
.vt-header__toggle[aria-expanded="true"] .vt-header__toggle-bar:nth-child(1){transform:translateY(3.75px) rotate(45deg)}
.vt-header__toggle[aria-expanded="true"] .vt-header__toggle-bar:nth-child(2){transform:translateY(-3.75px) rotate(-45deg)}
@media (max-width:880px){.vt-header__toggle{display:flex}.vt-header__nav{position:fixed;inset:var(--header-height) 0 auto 0;transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;transition:opacity var(--transition-normal),transform var(--transition-normal);background:rgba(5,6,8,0.98);border-bottom:1px solid var(--color-border-subtle);backdrop-filter:blur(18px);z-index:39}
.vt-header__nav-list{flex-direction:column;align-items:flex-start;padding:var(--space-4) var(--space-6) var(--space-6);gap:var(--space-3)}
.vt-header__nav-link{font-size:var(--font-size-base)}
.vt-header__nav.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.vt-header__cta{display:none}}
@media (max-width:520px){.vt-header__brand-subtitle{display:none}
.vt-header__inner{gap:var(--space-4)}}