.arq-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(24px);background:linear-gradient(90deg,rgba(2,6,23,0.95),rgba(15,23,42,0.9));border-bottom:1px solid rgba(148,163,184,0.35)}.arq-header-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px;padding-block:12px;gap:16px}.arq-header-brand{display:flex;align-items:center}.arq-header-logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:600;letter-spacing:.08em;text-transform:uppercase;font-size:.85rem;color:var(--color-text)}.arq-header-logo-mark{width:28px;height:28px;border-radius:999px;background:conic-gradient(from 180deg,rgba(34,211,238,.9),rgba(168,85,247,.85),rgba(251,191,36,.9),rgba(34,211,238,.9));box-shadow:0 0 18px rgba(56,189,248,.7);position:relative;overflow:hidden}.arq-header-logo-mark::after{content:"";position:absolute;inset:4px;border-radius:inherit;background:radial-gradient(circle at 30% 0,rgba(15,23,42,.4),rgba(2,6,23,.98))}.arq-header-logo-text{white-space:nowrap}.arq-header-nav{display:flex;align-items:center}.arq-header-nav-list{display:flex;align-items:center;gap:10px}.arq-header-nav-link{position:relative;display:inline-flex;align-items:center;justify-content:center;padding:.45rem .9rem;border-radius:999px;font-size:.8rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--color-text-muted);transition:color var(--transition-fast),background-color var(--transition-fast),box-shadow var(--transition-fast),transform var(--transition-fast)}.arq-header-nav-link::after{content:"";position:absolute;left:12%;right:12%;bottom:6px;height:1px;border-radius:999px;background:linear-gradient(90deg,rgba(56,189,248,0),rgba(56,189,248,.85),rgba(244,244,255,.8),rgba(168,85,247,.85),rgba(56,189,248,0));opacity:0;transform:scaleX(.6);transform-origin:center;transition:opacity var(--transition-fast),transform var(--transition-fast)}.arq-header-nav-link:hover{color:var(--color-text);background:rgba(15,23,42,.75);box-shadow:0 0 14px rgba(15,23,42,.8);transform:translateY(-1px)}.arq-header-nav-link:hover::after{opacity:1;transform:scaleX(1)}.arq-header-nav-link:focus-visible{outline:none;box-shadow:var(--outline-focus)}.arq-header-nav-cta .arq-header-nav-link{background:radial-gradient(circle at 0 0,rgba(34,211,238,.8),rgba(168,85,247,.9));color:var(--color-text);box-shadow:0 0 20px rgba(56,189,248,.6);padding-inline:1.2rem}.arq-header-nav-cta .arq-header-nav-link:hover{background:radial-gradient(circle at 0 0,rgba(251,191,36,.9),rgba(168,85,247,.95));box-shadow:0 0 26px rgba(168,85,247,.7)}.arq-header-toggle{display:none;position:relative;width:40px;height:40px;border-radius:999px;flex-direction:column;gap:4px;align-items:center;justify-content:center;padding:0;cursor:pointer;border:1px solid rgba(148,163,184,.7);background:radial-gradient(circle at 0 0,rgba(56,189,248,.25),rgba(15,23,42,.98));transition:background-color var(--transition-fast),box-shadow var(--transition-fast),border-color var(--transition-fast),transform var(--transition-fast)}.arq-header-toggle-bar{display:block;width:18px;height:2px;border-radius:999px;background:var(--color-text);flex-shrink:0;pointer-events:none;transform-origin:center;transition:transform var(--transition-fast),opacity var(--transition-fast)}.arq-header-toggle:focus-visible{outline:none;box-shadow:var(--outline-focus)}.arq-header-toggle[aria-expanded=true]{border-color:var(--color-accent-cyan);box-shadow:0 0 18px rgba(56,189,248,.6)}.arq-header-toggle[aria-expanded=true] .arq-header-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}.arq-header-toggle[aria-expanded=true] .arq-header-toggle-bar:nth-child(2){opacity:0}.arq-header-toggle[aria-expanded=true] .arq-header-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}@media (max-width:959.98px){.arq-header-toggle{display:inline-flex}.arq-header-nav{position:fixed;inset-inline:0;top:64px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity var(--transition-base),transform var(--transition-base);z-index:40}.arq-header-nav-list{flex-direction:column;align-items:stretch;margin:0 auto;padding:12px 16px 18px;max-width:480px;background:linear-gradient(160deg,rgba(15,23,42,.98),rgba(15,23,42,.96));border-radius:16px;border:1px solid rgba(148,163,184,.55);box-shadow:var(--shadow-glass)}.arq-header-nav-item{width:100%}.arq-header-nav-link{width:100%;justify-content:flex-start}.arq-header-nav-link::after{display:none}.arq-header-nav-cta .arq-header-nav-link{justify-content:center;margin-top:4px}.arq-header-nav.is-open{opacity:1;transform:translateY(0);pointer-events:auto}}@media (min-width:960px){.arq-header-nav-list{gap:4px}.arq-header-nav-link{font-size:.78rem;padding:.4rem .9rem}.arq-header-nav-cta .arq-header-nav-link{margin-left:4px}}