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

:root {
    --primary-color: #005da8;
    --secondary-color: #f5f5f5;
    --accent-color: #0077d6;
    --danger-color: #dc3545;
    --card-bg: #ffffff;
    --text-color: #333333;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family: 'Roboto', sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.header {
    padding: 1rem;
    background-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header h1 {
    color: #fff;
    font-size: 1.5rem;
    font-weight: 500;
    text-align: center;
}

.footer {
    padding: 1rem;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    margin-top: auto;
}

.container {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.form-add-contract {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.input-group {
    flex: 1;
    min-width: 200px;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

#contract {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

#contract:focus {
    border-color: var(--accent-color);
    outline: none;
}

.btn-add {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
    align-self: flex-end;
}

.btn-add:hover {
    background-color: var(--accent-color);
}

.contracts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contract-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.contract-card:hover {
    transform: translateY(-5px);
}

.contract-info {
    margin-bottom: 1rem;
}

.contract-info div {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

.contract-info span:first-child {
    color: #666;
}

.contract-info span:last-child {
    font-weight: 500;
}

.btn-remove {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-remove:hover {
    background-color: #c82333;
}

.total-container {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

#total-value {
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 500;
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }
    
    .form-add-contract {
        flex-direction: column;
    }
    
    .btn-add {
        width: 100%;
    }
}