/* ============================================= */
/* 3. HEADER & NAVIGATION                        */
/* ============================================= */
#header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1020;
    padding: var(--space-sm) 0;
}
#header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark-color);
    text-decoration: none;
}
.logo img {
    height: 50px;
    width: auto;
    border-radius: 50%;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}
.nav-menu ul {
    list-style: none;
    display: flex;
    gap: var(--space-md);
}
.nav-menu a {
    color: var(--text-color);
    font-weight: 600;
}
.nav-menu a:hover {
    color: var(--primary-color);
}

/* SUB-HEADER */
#sub-header {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: var(--space-xs) 0;
    font-size: 1.2rem;
    font-weight: 500;
    position: sticky;
    top: 83px;
    z-index: 1019;
    transition: transform 0.3s ease-in-out;
}
#sub-header.is-hidden {
    transform: translateY(-100%);
}
.sub-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.sub-header-icons {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}
.sub-header-icons a {
    color: var(--light-color);
    font-size: 1.5rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none;
}
.sub-header-icons a .icon-label {
    display: none;
    font-size: 0.9rem;
    font-weight: 500;
}
.sub-header-icons a:hover,
.sub-header-icons a.active {
    color: var(--primary-color);
    transform: scale(1.1);
}
.footer-menu-button {
    display: none;
}