.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
    background: rgba(7, 9, 18, 0.55);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0;
}

.header-cta{
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-tools{
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.header-select{
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding: 10px 34px 10px 12px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.14);
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.92);
    font-weight: 800;
    letter-spacing: -0.01em;
    cursor: pointer;
    background-image:
        linear-gradient(45deg, transparent 50%, rgba(255,255,255,0.70) 50%),
        linear-gradient(135deg, rgba(255,255,255,0.70) 50%, transparent 50%);
    background-position:
        calc(100% - 16px) 52%,
        calc(100% - 11px) 52%;
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
    color-scheme: dark;
}

.header-select option{
    background: #0f1220;
    color: rgba(255,255,255,0.92);
}

.header-select:hover{
    background-color: rgba(255,255,255,0.10);
}

.header-select:focus-visible{
    outline: 3px solid rgba(255, 51, 102, 0.35);
    outline-offset: 2px;
}

/* icon-btn eliminado (se quitó el toggle de tema). */

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.92);
    text-decoration: none;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.brand-logo {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
}

.brand-name { font-size: 1rem; }

.nav-list {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: -0.01em;
    padding: 10px 10px;
    border-radius: 10px;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.92);
    background: rgba(255, 255, 255, 0.06);
}

.nav-link.is-active {
    color: rgba(255, 255, 255, 0.92);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

@media (max-width: 900px) {
    .site-nav { display: none; }
    .header-cta .btn { padding: 10px 12px; }
    .header-select{ display: none; }
}