body {
    background-color: #74b9ff;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: #e2e8f0;
    text-align: center;
    margin: 0;
    padding: 50px 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #ffffff;
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    border: 3px solid #0984e3;
    color: #2d3436;
}

h1 {
    color: #0984e3;
    font-size: 28px;
    margin-bottom: 20px;
}

.mo-ta {
    font-size: 16px;
    color: #636e72;
    margin-bottom: 40px;
}

.gift-box {
    width: 180px;
    margin: 30px auto;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.gift-box:hover {
    transform: scale(1.1);
}

.gift-box img {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

.nut-bam {
    background-color: #0984e3;
    color: white;
    font-size: 16px;
    font-weight: bold;
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

input {
    padding: 12px;
    font-size: 16px;
    border-radius: 8px;
    border: 2px solid #ccc;
    width: 80%;
    margin-top: 10px;
}

.btn {
    padding: 12px 25px;
    font-size: 16px;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    margin: 10px;
    cursor: pointer;
}

.bat {
    background-color: #f1c40f;
    color: black;
}

.tat {
    background-color: #bdc3c7;
    color: black;
}

.btn-nhac, .btn-mo, .btn-dong, .btn-tinh, .btn-them, .btn-play, .btn-pause, .btn-check, .btn-kick, .btn-go {
    background-color: #0984e3;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    margin: 10px;
    font-weight: bold;
}

.btn-nhac:hover, .btn-mo:hover, .btn-dong:hover, .btn-tinh:hover, .btn-them:hover, .btn-play:hover, .btn-pause:hover, .btn-check:hover, .btn-kick:hover, .btn-go:hover {
    filter: brightness(0.9);
}

.thanh-cong {
    color: #2ecc71;
    background: #f1f2f6;
    padding: 10px;
    border-radius: 8px;
}

.that-bai {
    color: #e74c3c;
    background: #f1f2f6;
    padding: 10px;
    border-radius: 8px;
}

ul {
    list-style-type: none;
    padding: 0;
    text-align: left;
}

ul li {
    background: #f1f2f6;
    padding: 10px 15px;
    margin-bottom: 5px;
    border-radius: 8px;
    font-size: 18px;
    border-left: 5px solid #0984e3;
}

.danh-sach-phong {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

.phong-card {
    flex: 1;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    border-bottom: 4px solid #0984e3;
}

footer {
    margin-top: 40px;
    border-top: 1px solid #ccc;
    padding-top: 15px;
    font-size: 14px;
    color: #7f8c8d;
}