header {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 2rem;
    background: #ffffff;
    border-bottom: 1px solid #e5e5e5;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 1000;
}
.logo {
    font-family: 'Inter', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #111827;
}
.nav-container {
    display: flex;
    align-items: center;
    gap: 2rem;
}
.nav-link {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
    transition: color 0.2s ease;
}
.nav-link:hover {
    color: #3b82f6;
}
.login-btn {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: #ffffff;
    background: #3b82f6;
    padding: 0.5rem 1.25rem;
    border-radius: 0.25rem;
    border: none;
    transition: background 0.2s ease;
}
.login-btn:hover {
    background: #2563eb;
}
.dropdown {
    position: relative;
}
.dropdown-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    top: 100%;
    right: 0;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 0.25rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    width: 40rem;
    max-width: calc(100vw - 4rem);
    z-index: 1000;
    display: flex;
    gap: 3rem;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}
.dropdown:hover .dropdown-content {
    visibility: visible;
    opacity: 1;
}
.dropdown-column {
    flex: 1;
    min-width: 10rem;
}
.dropdown-column h3 {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: #111827;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}
.dropdown-item {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: #374151;
    display: block;
    padding: 0.75rem 0;
    transition: color 0.2s ease;
}
.dropdown-item:hover {
    color: #3b82f6;
}
.support-dropdown-content {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    top: 100%;
    right: 0;
    background: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 0.25rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    width: 20rem;
    max-width: calc(100vw - 4rem);
    z-index: 1000;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}
.dropdown:hover .support-dropdown-content {
    visibility: visible;
    opacity: 1;
}
.support-message {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: #374151;
    margin-top: 1rem;
    margin-bottom: 0.75rem;
}
.support-button {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: #ffffff;
    background: #3b82f6;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    border: none;
    display: inline-block;
    transition: background 0.2s ease;
    text-align: center;
}
.support-button:hover {
    background: #2563eb;
}