/* ==========================
   TRANSPARENT NAVBAR (REFINED)
========================== */

.site-header {
    background: rgba(240, 251, 249, 0.65); /* soft mint glass */
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 6px 22px rgba(15, 118, 110, 0.15);
}

/* ==========================
   CONTAINER
========================== */

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.9rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ==========================
   LOGO
========================== */

.logo img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    display: block;
}

/* ==========================
   MENU
========================== */

.nav-menu {
    display: flex;
    gap: 1.6rem;
}

.nav-menu a {
    color: #0f172a; /* dark text for readability */
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    border-radius: 6px;
    position: relative;
    transition: all 0.3s ease;
}

/* Underline */
.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #1abc9c;
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

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

/* Hover */
.nav-menu a:hover {
    color: #0f766e;
}

/* ==========================
   HAMBURGER
========================== */

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: #0f172a;
    cursor: pointer;
    padding: 0.5rem;
}

/* ==========================
   MOBILE MENU
========================== */

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(15, 118, 110, 0.95); /* deep teal */
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 1rem 0;
        text-align: center;
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
    }

    .nav-menu.nav-open {
        display: flex;
    }

    .nav-menu a {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
        color: #ffffff;
    }

    .nav-menu a::after {
        background: #a7f3d0;
    }

    .nav-menu a:hover {
        color: #a7f3d0;
    }

    .hamburger {
        display: block;
    }
}

/* ==========================
   SMALL DEVICES
========================== */

@media (max-width: 480px) {
    .nav-container {
        padding: 0.75rem 1rem;
    }

    .hamburger {
        font-size: 1.4rem;
    }
}