.dark-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--dark-border);
    transition: var(--dark-transition);
}
.dark-header.scrolled {
    background: rgba(10, 14, 23, 0.96);
    box-shadow: 0 2px 40px rgba(0, 0, 0, 0.4);
}

.dark-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.dark-logo img {
    height: 40px;
    width: auto;
}
.dark-logo h2 {
    color: var(--dark-text);
    font-size: 20px;
    font-weight: 700;
}

.dark-nav {
    display: flex;
    gap: 32px;
}
.dark-nav a {
    color: rgba(255, 255, 255, 0.65);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--dark-transition);
    position: relative;
    padding: 4px 0;
}
.dark-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--dark-gradient);
    transition: var(--dark-transition);
    border-radius: 2px;
}
.dark-nav a:hover {
    color: var(--dark-text);
}
.dark-nav a:hover::after {
    width: 100%;
}

.dark-phone {
    color: var(--dark-text);
    font-size: 15px;
    font-weight: 600;
    padding: 8px 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    transition: var(--dark-transition);
}
.dark-phone:hover {
    border-color: var(--dark-accent);
    background: var(--dark-accent-glow);
}