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

body {
    font-family: Arial, sans-serif;
    background-color: #f1f8f3;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 40px auto;
}

h1 {
    text-align: center;
    color: #2e7d32;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
}

/* Khung nhập dữ liệu */
.form-box {
    background-color: white;
    padding: 25px;
    margin-bottom: 25px;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.form-box h2,
.table-box h2 {
    color: #2e7d32;
    margin-bottom: 20px;
}

.form-box input {
    padding: 12px;
    margin: 5px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
}

button {
    padding: 12px 18px;
    border: none;
    border-radius: 6px;
    background-color: #2e7d32;
    color: white;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    opacity: 0.85;
}

/* Tìm kiếm */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.search-box input {
    flex: 1;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

/* Thống kê */
.statistics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.statistics > div {
    background-color: white;
    padding: 20px;
    text-align: center;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.statistics h3 {
    margin-bottom: 10px;
    color: #555;
}

.statistics span {
    font-size: 22px;
    font-weight: bold;
    color: #2e7d32;
}

/* Bảng */
.table-box {
    background-color: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background-color: #2e7d32;
    color: white;
    padding: 12px;
}

td {
    padding: 12px;
    text-align: center;
    border-bottom: 1px solid #ddd;
}

tr:hover {
    background-color: #f5f5f5;
}

/* Nút sửa */
.btn-edit {
    background-color: #1976d2;
    margin-right: 5px;
}

/* Nút xóa */
.btn-delete {
    background-color: #d32f2f;
}

/* Màn hình nhỏ */
@media (max-width: 800px) {

    .statistics {
        grid-template-columns: repeat(2, 1fr);
    }

    .search-box {
        flex-direction: column;
    }

    .form-box input {
        width: 100%;
        margin: 5px 0;
    }
}