/* ========================================
   HEADER
======================================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 40px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: saturate(180%) blur(20px);
    background: #FFFFFF;
    border-bottom: 2px solid #5AB9B5;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: 0 4px 20px rgba(90, 185, 181, 0.25);
}

.logo img {
    height: 70px;
    width: auto;
    filter: drop-shadow(0 1px 3px rgba(0,0,0,0.1));
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-item {
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    color: #2C3E50;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #5AB9B5;
    transition: width 0.3s ease;
}

.nav-item:hover {
    color: #5AB9B5;
}

.nav-item:hover::after {
    width: 100%;
}

/* HAMBURGER MOBILE */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: #2C3E50;
    margin: 3px 0;
    border-radius: 3px;
    transition: 0.3s;
}

.mobile-menu-toggle.active span:nth-child(1) { transform: rotate(-45deg) translate(-5px,6px); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: rotate(45deg) translate(-5px,-6px); }