body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background: #f0f2f5;
    color: #333;
}

.container {
    max-width: 1100px;
    margin: auto;
    padding: 20px;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #007bff;
}

/* Filters */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 25px;
}

.filters select {
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 14px;
}

/* Employee Buttons */
.employee-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
}

.employee-button {
    padding: 15px;
    background: #e0e0e0;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    font-size: 14px;
    transition: all 0.3s;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.employee-button.present {
    background: #28a745;
    color: #fff;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.employee-button:hover {
    transform: translateY(-2px);
}

/* Submit Button */
button.submit-btn {
    display: block;
    margin: 30px auto 0 auto;
    padding: 12px 25px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

button.submit-btn:hover {
    background: #0056b3;
}

@media (max-width: 600px) {
    .filters {
        flex-direction: column;
        align-items: center;
    }
}