body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f9;
    margin: 0;
    padding: 30px 15px;
    display: flex;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 750px;
}

/* 1. BẢNG SỰ KIỆN */
.table-title {
    text-align: center;
    color: #3b5998;
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 20px;
    text-transform: uppercase;
}

table {
    width: 100%;
    border-collapse: collapse;
    background-color: #ffffff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

th {
    background-color: #5c87c5;
    color: white;
    padding: 12px;
    font-size: 13px;
    text-transform: uppercase;
    border: 1px solid #4a75b3;
}

td {
    padding: 10px 12px;
    border: 1px solid #e0e0e0;
    font-size: 14px;
    color: #444;
}

/* Màu xen kẽ các dòng trong bảng */
tbody tr:nth-child(odd) {
    background-color: #f9fbfd;
}

tbody tr:nth-child(even) {
    background-color: #ffffff;
}

td:nth-child(1) { text-align: left; }
td:nth-child(2) { text-align: left; }
td:nth-child(3) { text-align: center; }


/* 2. FORM ĐĂNG KÝ */
.form-card {
    background-color: #ffffff;
    max-width: 420px;
    margin: 0 auto;
    padding: 25px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.form-title {
    text-align: center;
    color: #333333;
    font-size: 18px;
    font-weight: bold;
    margin-top: 0;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 13px;
    color: #555555;
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #dcdfe6;
    border-radius: 6px;
    font-size: 13px;
    color: #333;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #5c87c5;
}

.form-group textarea {
    resize: vertical;
    height: 70px;
}

.btn-submit {
    width: 100%;
    padding: 10px;
    background-color: #6495ed;
    color: #ffffff;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    margin-top: 10px;
    transition: background-color 0.2s;
}

.btn-submit:hover {
    background-color: #4a7bb3;
}