:root{
    --nav-main:#0f766e;
    --nav-main-dark:#0a4f4a;
    --nav-main-soft:#dff7f4;
    --nav-text:#163330;
    --nav-muted:#69807d;
    --nav-white:#ffffff;
    --nav-line:rgba(15,118,110,.08);
    --nav-shadow:0 12px 30px rgba(8,25,22,.08);
}

.header *{
    box-sizing:border-box;
}

.header{
    position:sticky;
    top:0;
    z-index:9999;
    background:rgba(255,255,255,.96);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--nav-line);
}

.header .container{
    width:min(1200px, calc(100% - 32px));
    margin-inline:auto;
}

.header .nav{
    min-height:84px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
}

.brand{
    display:flex;
    align-items:center;
    gap:12px;
    text-decoration:none;
    flex-shrink:0;
}

.brand-icon{
    width:54px;
    height:54px;
    border-radius:18px;
    background:linear-gradient(135deg, var(--nav-main), #16988b);
    color:var(--nav-white);
    display:grid;
    place-items:center;
    font-size:22px;
    box-shadow:0 12px 24px rgba(15,118,110,.20);
}

.brand-text{
    display:flex;
    flex-direction:column;
    line-height:1.1;
}

.brand-text h1{
    margin:0;
    font-size:20px;
    color:#0b1f1c;
    font-weight:900;
}

.brand-text span{
    font-size:12px;
    color:var(--nav-muted);
    letter-spacing:.6px;
}

.menu{
    display:flex;
    align-items:center;
    gap:10px;
    flex-wrap:wrap;
}

.menu a{
    text-decoration:none;
    color:var(--nav-text);
    font-weight:800;
    font-size:18px;
    padding:11px 18px;
    border-radius:16px;
    transition:.25s ease;
}

.menu a:hover{
    background:rgba(15,118,110,.06);
    color:var(--nav-main-dark);
}

.menu a.active{
    background:var(--nav-main-soft);
    color:var(--nav-main-dark);
    box-shadow:inset 0 0 0 1px rgba(15,118,110,.04);
}

.menu-toggle{
    display:none;
    width:50px;
    height:50px;
    border:none;
    border-radius:16px;
    background:#fff;
    cursor:pointer;
    box-shadow:var(--nav-shadow);
    padding:0;
    flex-shrink:0;
}

.menu-toggle span{
    display:block;
    width:22px;
    height:2px;
    margin:5px auto;
    border-radius:999px;
    background:#0b1f1c;
    transition:.25s ease;
}

.menu-toggle.active span:nth-child(1){
    transform:translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2){
    opacity:0;
}

.menu-toggle.active span:nth-child(3){
    transform:translateY(-7px) rotate(-45deg);
}

@media (max-width:960px){
    .header .nav{
        position:relative;
    }

    .menu-toggle{
        display:block;
    }

    .menu{
        position:absolute;
        top:calc(100% + 12px);
        right:0;
        left:0;
        display:none;
        flex-direction:column;
        align-items:stretch;
        gap:8px;
        background:#fff;
        border:1px solid var(--nav-line);
        border-radius:22px;
        padding:12px;
        box-shadow:0 18px 40px rgba(8,25,22,.10);
    }

    .menu.open{
        display:flex;
    }

    .menu a{
        display:block;
        width:100%;
        text-align:right;
        font-size:17px;
        padding:14px 16px;
        background:#f8fcfb;
        border:1px solid #e7f0ee;
        border-radius:14px;
    }
}

@media (max-width:640px){
    .brand-text h1{
        font-size:18px;
    }

    .brand-text span{
        font-size:11px;
    }

    .brand-icon{
        width:48px;
        height:48px;
        font-size:20px;
    }
}