:root {
    --bg-color: #f0f4f8;
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --text-color: #333;
    --text-light: #666;
    --white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 40px;
    font-weight: 700;
    font-size: 2.5rem;
}

.info-block {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    border-left: 5px solid var(--accent-color);
}

.info-block p {
    margin-bottom: 15px;
}

.info-block p:last-child {
    margin-bottom: 0;
}

.important {
    color: #e74c3c;
    font-weight: 600;
}

form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--primary-color);
}

input[type="date"],
input[type="number"],
input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    box-sizing: border-box;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

button {
    padding: 14px 30px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: var(--accent-color);
    color: var(--white);
}

button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

button.secondary {
    background-color: #95a5a6;
}

button.secondary:hover {
    background-color: #7f8c8d;
}

#resultsContainer {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
    display: none; /* Hidden by default */
}

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

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f8f9fa;
    color: var(--primary-color);
    font-weight: 600;
}

tr:hover {
    background-color: #f8f9fa;
}

tfoot td {
    font-weight: 700;
    font-size: 1.1rem;
    background-color: #f8f9fa;
    border-top: 2px solid var(--primary-color);
}

.footer {
    text-align: center;
    margin-top: 50px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 40px;
    border-radius: var(--radius);
    width: 90%;
    max-width: 600px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    position: relative;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    color: #aaa;
    cursor: pointer;
    transition: color 0.3s;
}

.close-modal:hover {
    color: var(--text-color);
}

.modal h2 {
    margin-top: 0;
    color: var(--primary-color);
    text-align: center;
}

.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

/* Print Styles */
@media print {
    body {
        background-color: white;
    }
    
    .container {
        width: 100%;
        max-width: none;
        padding: 0;
        margin: 0;
    }

    h1, .info-block, form, .footer, .modal, button {
        display: none;
    }

    #resultsContainer {
        display: block !important;
        box-shadow: none;
        padding: 0;
    }

    #printHeader {
        display: block !important;
    }

    table {
        font-size: 12px;
    }
}

#printHeader {
    display: none;
    text-align: center;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    form, .info-block {
        padding: 20px;
    }
    
    th, td {
        padding: 10px;
        font-size: 14px;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}