* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Montserrat', sans-serif;
    background: #fff;
    color: #111;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
    height: 100%;
}


html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Montserrat', sans-serif;
}


/* Phần nội dung chính sẽ chiếm phần còn lại */
main {
    flex: 1;
}

.header {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    align-items: center;
    border-bottom: 1px solid #ddd;
}

.logo {
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo .dot {
    width: 10px;
    height: 10px;
    background: orange;
    border-radius: 50%;
    display: inline-block;
}

.role {
    color: gray;
    font-weight: normal;
}

.nav a {
    margin-left: 20px;
    text-decoration: none;
    color: black;
    font-size: 0.9rem;
}

.main {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    padding: 60px 20px;
    text-align: center;
    gap: 40px;
}

.profile-pic img {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    filter: none;
}

.intro h1 {
    font-size: 3rem;
}

.intro h3 {
    margin-top: 10px;
    font-size: 1.2rem;
    font-weight: bold;
}

.intro p {
    max-width: 400px;
    margin: 20px auto;
    font-size: 0.95rem;
    color: #444;
}

.buttons {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;                /* Căn giữa */
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-weight: bold;
    font-size: 0.95rem;
    text-align: center;
    color: white;
    transition: transform 0.2s ease;
}

.btn:hover {
    transform: scale(1.05);
}

.btn.yellow {
    background: #f4b400;
}

.btn.red {
    background: #f44336;
}

.btn.blue {
    background: #4dd0e1;
    color: #000;
}

.footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    text-align: center;
    /*padding: 40px 20px;*/
    background: #f9f9f9;
    border-top: 1px solid #ddd;
    font-size: 0.85rem;
    gap: 20px;

    padding: 1rem;
}

.footer-item a i {
    font-size: 28px;
    margin: 2px;
    color: #000;
    background-color: #fff;
    border-radius: 50%;
    padding: 10px;
    transition: all 0.3s ease;
}

.footer-item a:hover i {
    background-color: #f0f0f0; /* Hover nhẹ */
    transform: scale(1.1);
}
.copyright {
    flex-basis: 100%;
    margin-top: 20px;
    font-size: 0.75rem;
    color: #777;
}

/* Responsive */
@media (max-width: 768px) {
    .main {
        flex-direction: column;
    }

    .intro h1 {
        font-size: 2.5rem;
    }

    .btn {
        width: 100px;
        height: 100px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        font-weight: bold;
        font-size: 1rem;
        text-align: center;
        color: white;
    }
}

.profile-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 10px;
    vertical-align: middle;
}