:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --background-color: #f5f5f5;
    --card-bg: white;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', 'Arial', sans-serif;
    background-color: var(--background-color);
    color: #333;
    line-height: 1.6;
    padding: var(--spacing-md);
}

.page-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    padding: 15px 20px;
    font-weight: bold;
    text-align: center;
}

.card-body {
    padding: var(--spacing-lg);
}

/* Form Styling */
.form-section {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    margin-bottom: var(--spacing-md);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.2rem;
    color: #444;
}

.form-grid {
    display: grid;
    gap: var(--spacing-md);
}

.colindancias-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.colores-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.offset-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-control {
    display: flex;
    flex-direction: column;
}

.input-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

label {
    font-weight: 600;
    margin-bottom: 5px;
    color: #555;
}

input,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: var(--transition);
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

input[type="color"] {
    height: 40px;
    padding: 2px;
}

input[type="range"] {
    margin-bottom: var(--spacing-xs);
}

.range-value {
    font-size: 0.9rem;
    color: #666;
}

/* Buttons */
.btn-container {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    justify-content: center;
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn i {
    font-size: 18px;
}

/* Output Section */
.canvas-container {
    padding: var(--spacing-lg);
    display: flex;
    justify-content: center;
    position: relative;
    overflow-x: auto;
}

canvas {
    border: 1px solid var(--border-color);
    background-color: #fff;
    max-width: 100%;
}

.legend {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: #f9f9f9;
}

.legend-title {
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.color-box {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-sm);
    border: 1px solid #ccc;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-lg);
}

.info-table th,
.info-table td {
    border: 1px solid var(--border-color);
    padding: 12px;
    text-align: left;
}

.info-table th {
    background-color: #f2f2f2;
    font-weight: 600;
}

.info-table tr:nth-child(even) {
    background-color: #f9f9f9;
}

.scale-info {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-style: italic;
    color: #666;
}

.footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: #777;
}

/* Responsive Design */
@media (min-width: 768px) {
    .input-output-container {
        display: flex;
        gap: var(--spacing-lg);
    }

    .input-section,
    .output-section {
        flex: 1;
    }
}

@media (max-width: 767px) {

    .input-section,
    .output-section {
        margin-bottom: var(--spacing-lg);
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .btn-container {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* Print Styles */
@media print {

    .input-section,
    .no-print {
        display: none;
    }

    body {
        background-color: white;
        padding: 0;
    }

    .output-section {
        box-shadow: none;
        margin: 0;
    }

    .page-title {
        display: none;
    }
}

.hidden {
    display: none;
}

/* Collapsible panels for mobile */
.collapse-toggle {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.collapse-toggle::after {
    content: '\f078';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    transition: var(--transition);
}

.collapse-toggle.collapsed::after {
    transform: rotate(180deg);
}

.collapsible-content {
    transition: max-height 0.3s ease;
    overflow: hidden;
}

.collapsible-content.collapsed {
    max-height: 0;
}