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

body {
    font-family: Arial, sans-serif;
    background-color: #f0f4f8;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
    padding: 20px;
    background-color: #000000;
    color: white;
    border-radius: 10px;
}

h2 {
    color: #000000;
    margin-bottom: 15px;
    border-bottom: 2px solid #000000;
    padding-bottom: 10px;
}

.section {
    background-color: white;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #34495e;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #bdc3c7;
    border-radius: 5px;
    font-size: 16px;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #3498db;
}

.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    width: 100%;
}

.btn-add {
    background-color: #27ae60;
    color: white;
}

.btn-add:hover {
    background-color: #219a52;
}

.btn-allocate {
    background-color: #219a52;
    color: white;
}


.btn-delete {
    background-color: #e74c3c;
    color: white;
    padding: 5px 10px;
    width: auto;
    font-size: 14px;
}

.btn-delete:hover {
    background-color: #c0392b;
}

.no-data {
    color: #7f8c8d;
    text-align: center;
    padding: 20px;
}


.classroom-card {
    background-color: #ecf0f1;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.classroom-info {
    flex: 1;
}

.classroom-info p {
    margin: 5px 0;
    color: #2c3e50;
}

.classroom-info span {
    font-weight: bold;
    color: #3498db;
}


.allocation-card {
    background-color: #d5f5e3;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    border-left: 4px solid #27ae60;
}

.allocation-card p {
    margin: 5px 0;
    color: #2c3e50;
}

.error-message {
    background-color: #fadbd8;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #e74c3c;
    color: #c0392b;
    text-align: center;
}

.success-message {
    background-color: #d5f5e3;
    padding: 15px;
    border-radius: 5px;
    border-left: 4px solid #27ae60;
    color: #27ae60;
    text-align: center;
    margin-bottom: 15px;
}

.allocate-form {
    display: flex;
    gap: 15px;
    align-items: flex-end;
}

.allocate-form .form-group {
    flex: 1;
    margin-bottom: 0;
}

.allocate-form .btn {
    width: auto;
    padding: 10px 25px;
}

.summary {
    background-color: #ebf5fb;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 15px;
}

.summary p {
    margin: 5px 0;
    font-size: 16px;
}