/* Estilos generales */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --gray-color: #95a5a6;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color), #1a2530);
    color: white;
    padding: 25px 30px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    box-shadow: var(--box-shadow);
}

.logo-container h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 5px;
    display: flex;
    align-items: center;
}

.logo-container h1 i {
    margin-right: 15px;
    color: var(--secondary-color);
}

.subtitle {
    font-size: 16px;
    opacity: 0.9;
    margin-left: 45px;
}

.header-info {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    font-size: 14px;
}

.last-update, .version {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Layout principal */
.app-wrapper {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

/* Sidebar */
.sidebar {
    flex: 0 0 250px;
    background-color: white;
    border-radius: var(--border-radius);
    padding: 25px 0;
    box-shadow: var(--box-shadow);
    height: fit-content;
}

.nav-section {
    margin-bottom: 30px;
    padding: 0 20px;
}

.nav-section h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-menu {
    list-style: none;
}

.nav-menu li {
    padding: 12px 15px;
    border-radius: 6px;
    margin-bottom: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.nav-menu li:hover {
    background-color: #f0f7ff;
    color: var(--secondary-color);
}

.nav-menu li.active {
    background-color: #e3f2fd;
    color: var(--secondary-color);
    font-weight: 500;
    border-left: 4px solid var(--secondary-color);
}

.nav-menu li i {
    width: 20px;
    text-align: center;
}

.info-box {
    background-color: #f9f9f9;
    border-left: 4px solid var(--warning-color);
    padding: 15px;
    margin: 20px;
    border-radius: 6px;
}

.info-box h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.info-box p {
    font-size: 13px;
    color: #666;
    margin-bottom: 15px;
}

.legal-links a {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.legal-links a:hover {
    text-decoration: underline;
}

/* Contenido principal */
.main-content {
    flex: 1;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.section-header {
    margin-bottom: 30px;
}

.section-header h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 26px;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.section-header p {
    color: var(--gray-color);
    font-size: 16px;
    margin-left: 45px;
}

/* Tarjeta de calculadora */
.calculator-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    display: flex;
    min-height: 600px;
}

.calculator-form {
    flex: 1;
    padding: 30px;
    border-right: 1px solid #eee;
}

.calculator-results {
    flex: 1;
    padding: 30px;
    background-color: #f9fafc;
}

/* Formulario */
.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group input {
    width: 100%;
    padding: 14px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
}

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

.input-unit {
    position: absolute;
    right: 15px;
    color: var(--gray-color);
}

.range-container {
    margin-top: 15px;
}

.range-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: #ddd;
    outline: none;
    -webkit-appearance: none;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--secondary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}

.range-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--secondary-color);
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 0 5px rgba(0,0,0,0.2);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 12px;
    color: var(--gray-color);
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

select {
    width: 100%;
    padding: 14px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
    background-color: white;
    cursor: pointer;
    transition: var(--transition);
}

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

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    gap: 8px;
}

.checkbox-label input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.btn-help {
    background: none;
    border: none;
    color: var(--secondary-color);
    font-size: 18px;
    cursor: pointer;
    margin-left: 10px;
    transition: var(--transition);
}

.btn-help:hover {
    color: var(--primary-color);
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.btn {
    padding: 14px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
    flex: 2;
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background-color: #f1f1f1;
    color: var(--primary-color);
    flex: 1;
}

.btn-secondary:hover {
    background-color: #e0e0e0;
}

/* Resultados */
.calculator-results h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.results-container {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.result-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.result-item.highlight {
    border-bottom: 2px solid var(--secondary-color);
}

.result-label {
    font-size: 15px;
    color: var(--gray-color);
    margin-bottom: 5px;
}

.result-value {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 25px;
}

.result-grid .result-item {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.result-grid .result-label {
    font-size: 14px;
}

.result-grid .result-value {
    font-size: 18px;
}

.chart-container {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.chart-container h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.chart {
    height: 200px;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.chart-placeholder {
    text-align: center;
    color: var(--gray-color);
}

.placeholder-section {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 80px 30px;
    text-align: center;
    box-shadow: var(--box-shadow);
    color: var(--gray-color);
    font-size: 18px;
}

.placeholder-section i {
    font-size: 24px;
    margin-left: 10px;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    margin-top: 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-family: 'Poppins', sans-serif;
    font-size: 18px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-section p {
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.5;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    opacity: 0.7;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: white;
    width: 90%;
    max-width: 600px;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.modal-header {
    background-color: var(--primary-color);
    color: white;
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 22px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.close-modal {
    font-size: 28px;
    cursor: pointer;
    transition: var(--transition);
}

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

.modal-body {
    padding: 30px;
    line-height: 1.6;
}

.modal-body p {
    margin-bottom: 15px;
}

.modal-footer {
    padding: 20px 30px;
    background-color: #f9f9f9;
    text-align: right;
}

.close-modal-btn {
    padding: 12px 24px;
}

/* Responsive */
@media (max-width: 1100px) {
    .calculator-card {
        flex-direction: column;
    }
    
    .calculator-form {
        border-right: none;
        border-bottom: 1px solid #eee;
    }
}

@media (max-width: 900px) {
    .app-wrapper {
        flex-direction: column;
    }
    
    .sidebar {
        flex: none;
        width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .header-info {
        flex-direction: column;
        gap: 10px;
    }
}