* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f0f8ff;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: #4a90e2;
    color: white;
    padding: 20px 0;
    text-align: center;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

.menu {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    background-color: #ff9f40;
    color: white;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background-color: #ff7b00;
    transform: translateY(-3px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #545b62;
}

.form-container, .table-container {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

input[type="text"],
input[type="number"],
input[type="month"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border 0.3s;
}

input:focus,
select:focus,
textarea:focus {
    border-color: #4a90e2;
    outline: none;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: #f8f9fa;
    color: #4a90e2;
    font-weight: 700;
}

tr:hover {
    background-color: #f9f9f9;
}

.success-message {
    background-color: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 5px solid #28a745;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 5px solid #dc3545;
}

footer {
    text-align: center;
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    color: #777;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .menu {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    table {
        display: block;
        overflow-x: auto;
    }
}