/* ========== HEADER ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0.85rem 2rem;
    background: rgba(3, 4, 6, 0.7);
    backdrop-filter: blur(24px) saturate(190%);
    -webkit-backdrop-filter: blur(24px) saturate(190%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.35s cubic-bezier(0.23, 1, 0.32, 1);
}

.site-header.scrolled {
    padding: 0.65rem 2rem;
    background: rgba(3, 4, 6, 0.94);
    border-bottom-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.7);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #ffffff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    white-space: nowrap;
    transition: transform 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.brand-logo-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    object-fit: cover;
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: #ffffff;
    vertical-align: middle;
    transition: border-color 0.3s, transform 0.3s;
}

.brand-logo:hover .brand-logo-badge {
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.05);
}

.brand-logo-text {
    font-family: var(--font-mono);
    font-weight: 700;
    display: inline-block;
    transition: color 0.3s;
    white-space: nowrap;
}

.brand-logo:hover {
    transform: translateY(-1px);
}

.brand-logo:hover .brand-logo-text {
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0.25rem 0.35rem;
    border-radius: 999px;
    backdrop-filter: blur(12px);
}

.nav-item {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.85rem;
    border-radius: 999px;
    white-space: nowrap;
    border: 1px solid transparent;
    transition: all 0.25s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
}

.nav-item .nav-num {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: rgba(255, 255, 255, 0.45);
    letter-spacing: 0.05em;
    transition: color 0.25s;
}

.nav-item .nav-label {
    font-family: var(--font-heading);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.75);
    transition: color 0.25s;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.12);
}

.nav-item:hover .nav-num,
.nav-item:hover .nav-label {
    color: #ffffff;
}

.nav-item.active {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.22);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.15), 0 4px 15px rgba(0, 0, 0, 0.3);
}

.nav-item.active .nav-num {
    color: var(--color-primary);
}

.nav-item.active .nav-label {
    color: #ffffff;
}

.nav-item.active::after {
    display: none;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.location-clock {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: right;
    line-height: 1.3;
}

.location-clock span {
    color: #ffffff;
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid var(--border-bright);
    color: #fff;
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
}

.sfx-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    background: rgba(6, 182, 212, 0.08);
    border: 1px solid rgba(6, 182, 212, 0.3);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.sfx-toggle-btn:hover {
    background: rgba(6, 182, 212, 0.18);
    border-color: var(--color-primary);
    box-shadow: 0 0 16px var(--color-primary-glow);
}

.sfx-toggle-btn.muted {
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--border-subtle);
}

.sfx-pulse-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--color-primary);
    box-shadow: 0 0 8px var(--color-primary);
    transition: background-color 0.3s, box-shadow 0.3s;
}

.sfx-toggle-btn.muted .sfx-pulse-dot {
    background-color: var(--text-dim);
    box-shadow: none;
}