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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
}

header {
    background: #2c3e50;
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.toolbar button {
    background: #3498db;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    margin-left: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
}

.toolbar button:hover {
    background: #2980b9;
}

.main-content {
    display: flex;
    min-height: calc(100vh - 80px);
}

.sidebar {
    width: 200px;
    background: #34495e;
    color: white;
}

.sidebar ul {
    list-style: none;
}

.sidebar li {
    padding: 1rem;
    cursor: pointer;
    border-bottom: 1px solid #2c3e50;
}

.sidebar li:hover,
.sidebar li.active {
    background: #2c3e50;
}

.content {
    flex: 1;
    padding: 2rem;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: inline-block;
    width: 120px;
    font-weight: bold;
}

.form-group input[type="text"],
.form-group input[type="number"] {
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    width: 200px;
}

.form-group input[type="checkbox"] {
    transform: scale(1.5);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

th, td {
    border: 1px solid #ddd;
    padding: 0.5rem;
    text-align: left;
}

th {
    background: #f8f9fa;
}

button {
    background: #3498db;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    margin: 0.2rem;
}

button:hover {
    background: #2980b9;
}

button.delete {
    background: #e74c3c;
}

button.delete:hover {
    background: #c0392b;
}

.daily-class-card {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    background: #f8f9fa;
}

.daily-class-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.classlist-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.classlist-input {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#dividerInputs input {
    margin: 0.5rem;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}