.main-nav{
    position: sticky;
    top: 0;
    z-index: 1000;

    display: flex;
    justify-content: center;
    align-items: center;

    gap: 16px;
    padding: 8px 16px;

    background: rgba(4, 6, 8, 0.85);
    backdrop-filter: blur(12px);

    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.main-nav a,
.nav-logout,
.nav-user{
    position: relative;

    color: #ffffff;
    text-decoration: none;

    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    font-weight: 500;

    padding: 5px 11px;
    border-radius: 8px;

    transition: all 0.25s ease;
}

.nav-logout {
    border: 1px solid rgba(255,255,255,0.18);
    background: rgba(255,255,255,0.08);
    cursor: pointer;
}

.nav-user {
    color: rgba(255,255,255,0.78);
    background: rgba(255,255,255,0.06);
    max-width: 260px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.main-nav [hidden] {
    display: none !important;
}

.main-nav a:hover,
.nav-logout:hover{
    color: #ffffff;
    background: rgba(255,255,255,0.08);
    transform: translateY(-1px);
}

.main-nav .student-zone-link {
    color: #102033;
    background: linear-gradient(135deg, #e8f5e7, #ffffff);
    border: 1px solid rgba(184, 212, 156, 0.9);
    box-shadow: 0 4px 14px rgba(184, 212, 156, 0.22);
    font-weight: 700;
}

.main-nav .student-zone-link:hover {
    color: #102033;
    background: linear-gradient(135deg, #dff1db, #ffffff);
    box-shadow: 0 6px 18px rgba(184, 212, 156, 0.32);
}

.main-nav .my-panel-link {
    color: #102033;
    background: linear-gradient(135deg, #edf4fb, #ffffff);
    border: 1px solid rgba(142, 181, 222, 0.9);
    box-shadow: 0 4px 14px rgba(142, 181, 222, 0.22);
    font-weight: 700;
}

.main-nav .signup-link {
    color: #102033;
    background: linear-gradient(135deg, #edf4fb, #ffffff);
    border: 1px solid rgba(142, 181, 222, 0.9);
    box-shadow: 0 4px 14px rgba(142, 181, 222, 0.22);
    font-weight: 700;
}

.main-nav .my-panel-link:hover {
    color: #102033;
    background: linear-gradient(135deg, #dbeaf8, #ffffff);
    box-shadow: 0 6px 18px rgba(142, 181, 222, 0.32);
}

.main-nav .signup-link:hover {
    color: #102033;
    background: linear-gradient(135deg, #dbeaf8, #ffffff);
    box-shadow: 0 6px 18px rgba(142, 181, 222, 0.32);
}

.main-nav a.active{
    color: #ffffff;
    background: rgba(88,101,242,0.25);
}

.main-nav .student-zone-link.active {
    color: #102033;
    background: linear-gradient(135deg, #dff1db, #ffffff);
}

.main-nav .my-panel-link.active {
    color: #102033;
    background: linear-gradient(135deg, #dbeaf8, #ffffff);
}

.main-nav .signup-link.active {
    color: #102033;
    background: linear-gradient(135deg, #dbeaf8, #ffffff);
}

footer {
    text-align: center;
    padding: 15px;
    background: #1f2a36;
    color: #aaa;
}

.footer-contact {
    display: flex;
    justify-content: center;
    padding: 12px 16px 18px;
    background: #1f2a36;
}

.footer-contact a {
    color: #ffffff;
    text-decoration: none;
    font-family: 'Poppins', sans-serif;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 999px;
    padding: 8px 14px;
    background: rgba(255,255,255,0.06);
}

.footer-contact a:hover {
    background: rgba(255,255,255,0.12);
}

/* MOBILE */
@media (max-width: 760px){
    .main-nav{
        flex-wrap: nowrap;
        justify-content: center;
        gap: 2px;
        padding: 6px 5px;
    }

    .main-nav a,
    .nav-logout,
    .nav-user{
        flex: 0 1 auto;
        min-width: 0;
        white-space: nowrap;
        font-size: 9px;
        line-height: 1.1;
        padding: 5px 4px;
    }

    .nav-user {
        display: none;
    }
}

@media (max-width: 340px){
    .main-nav{
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 4px;
        padding: 6px;
    }

    .main-nav a,
    .nav-logout,
    .nav-user{
        width: 100%;
        text-align: center;
        font-size: 11px;
        padding: 5px 4px;
    }
}