* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Montserrat', sans-serif;
}

body {
    height: 100vh;
    background: linear-gradient(135deg, #0f0f0f, #1c1c1c);
    color: #ffffff;
    overflow: hidden;
}

.overlay {
    position: fixed;
    inset: 0;
    background: url("https://media.vietnamplus.vn/images/7255a701687d11cb8c6bbc58a6c80785feb0b93bb871efb7308f8f3ff9024888e0ae3d5e7775a4f6670f82777c7a7c5fc015f1d26d04647b32a8a01814a21753920d2112a9ddc5cad97e91bd791c3f00/5-hai-thiet-ke-den-tu-ntk-thuy-nguyen-9427.jpg")
                center / cover no-repeat;
    opacity: 0.15;
    z-index: 0;
}

.container {
    position: relative;
    z-index: 1;
    height: 100%;
    max-width: 1200px;
    margin: auto;
    padding: 40px 20px;

    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 4px;
    text-transform: uppercase;
}

.content {
    text-align: center;
    max-width: 700px;
    margin: auto;
}

.content h2 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 16px;
}

.subtitle {
    font-size: 16px;
    line-height: 1.8;
    color: #cccccc;
}

.divider {
    width: 80px;
    height: 2px;
    background: #ffffff;
    margin: 30px auto;
    opacity: 0.4;
}

.note {
    font-size: 14px;
    color: #aaaaaa;
    margin-bottom: 30px;
}

.contact {
    font-size: 14px;
}

.contact a {
    color: #ffffff;
    text-decoration: none;
    margin-left: 6px;
    border-bottom: 1px solid transparent;
    transition: 0.3s;
}

.contact a:hover {
    border-color: #ffffff;
}

.footer {
    text-align: center;
    font-size: 12px;
    color: #777777;
}