.header{position:fixed;top:0;left:0;right:0;z-index:50;background:#213b5cf2;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);box-shadow:0 10px 15px -3px #00000026;color:#fff;transition:background .3s ease,box-shadow .3s ease}.header-inner{display:flex;align-items:center;justify-content:space-between;height:56px}.brand{display:flex;align-items:center;gap:12px;color:#fff}.brand-name{display:block;font-size:1.125rem;font-weight:900;letter-spacing:-.03em;line-height:1}.brand-tag{display:block;margin-top:3px;font-size:.65rem;font-weight:600;letter-spacing:.3em;text-transform:uppercase;color:var(--color-accent);opacity:.85}.nav{display:none;align-items:center;gap:24px}.nav a{font-size:.875rem;font-weight:500;color:#ffffffb3;transition:color .2s ease}.nav a:hover{color:var(--color-accent)}.header-wa{display:inline-flex;align-items:center;gap:8px;border-radius:8px;background:var(--color-accent);color:#fff!important;padding:8px 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