/* 🎥 VIDEO NỀN */
#bgVideo {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
    object-fit: cover;
    z-index: -1;
}

/* 📦 KHUNG NỘI DUNG */
.content {
    position: relative;
    z-index: 1;
    padding: 20px;
}

/* 🟦 TIÊU ĐỀ */
h2 {
    color: white;
    text-align: center;
    font-size: 32px;
    background: rgba(0, 123, 255, 0.7);
    padding: 10px;
    border-radius: 10px;
}

/* 🔵 BẢNG */
table {
    margin: auto;
    width: 80%;
    border-collapse: collapse;
    background: rgba(0, 123, 255, 0.9);
    color: white;
    font-weight: bold;
    border-radius: 10px;
    overflow: hidden;
}

/* 🔷 HEADER */
th {
    background: #0056b3;
    color: white;
    padding: 12px;
    font-size: 18px;
}

/* 🔹 CELL */
td {
    padding: 10px;
    text-align: center;
}

/* ✨ HOVER DÒNG */
tr:hover {
    background: rgba(0, 200, 255, 0.6);
}

/* 🔗 LINK */
a {
    color: white;
    font-weight: bold;
    text-decoration: none;
}

    a:hover {
        color: yellow;
    }

/* 🔘 BUTTON */
button {
    background: #007bff;
    color: white;
    border: none;
    padding: 8px 15px;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
}

    button:hover {
        background: #0056b3;
    }

/* 📦 FORM */
form {
    text-align: center;
    background: rgba(0, 123, 255, 0.7);
    padding: 20px;
    width: 320px;
    margin: auto;
    border-radius: 10px;
}

/* 📥 INPUT */
input {
    margin: 5px;
    padding: 6px;
    width: 90%;
    border-radius: 5px;
    border: none;
}

/* 🖼️ ẢNH */
img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid yellow;
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
    transition: 0.3s;
}

    /* ✨ HOVER ẢNH */
    img:hover {
        transform: scale(1.2);
        border-color: white;
    }

/* 🎯 CANH GIỮA ẢNH */
td img {
    display: block;
    margin: auto;
}