/* css/calculadora-integrales.css */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --background-color: #f8fafc;
    --text-color: #1a1a1a;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Estilos del bot¨®n volver */
.back-button-container {
    margin: 20px 0;
    padding: 0 20px;
}

.back-button {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    background-color: var(--primary-color);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.back-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.back-button i {
    margin-right: 8px;
    color: white;
}

.back-button span {
    color: white;
    font-weight: 500;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    padding: 20px;
}

/* Contenedor principal */
.calculator-container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
}

/* Encabezado */
.calculator-header {
    text-align: center;
    margin-bottom: 3rem;
}

.calculator-header h1 {
    color: var(--primary-dark);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.calculator-description {
    color: var(--secondary-color);
    font-size: 1.1rem;
}

/* Secci¨®n de introducci¨®n */
.intro-section {
    margin-bottom: 3rem;
    padding: 2rem;
    background: #f8fafc;
    border-radius: var(--border-radius);
}

.integral-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.type-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.type-card h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.example {
    margin-top: 1rem;
    padding: 1rem;
    background: #f1f5f9;
    border-radius: var(--border-radius);
    font-family: monospace;
    font-size: 1.1rem;
}

/* Calculadora */
.calculator-section {
    margin-bottom: 3rem;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.input-type-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.input-type-selector button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    background: #e2e8f0;
    cursor: pointer;
    transition: var(--transition);
}

.input-type-selector button.active {
    background: var(--primary-color);
    color: white;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.integral-symbol {
    font-size: 2rem;
    color: var(--primary-dark);
}

#function-input {
    flex: 1;
    padding: 1rem;
    font-size: 1.1rem;
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

#function-input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.limits-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.limit input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius);
}

.calculate-button {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
}

.calculate-button:hover {
    background: var(--primary-dark);
}

/* Resultado */
.result-section {
    margin-top: 2rem;
    padding: 2rem;
    background: #f8fafc;
    border-radius: var(--border-radius);
}

.result-display {
    margin: 1rem 0;
    padding: 1.5rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    font-size: 1.2rem;
}

/* Gu¨ªa de uso */
.usage-guide {
    margin-top: 3rem;
}

.functions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.function-type {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.function-type h4 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.function-type ul {
    list-style: none;
}

.function-type li {
    margin-bottom: 0.5rem;
    font-family: monospace;
}

/* Teor¨ªa y conceptos */
.theory-section {
    margin-top: 3rem;
}

.concept-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.concept-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* FAQ */
.faq-section {
    margin-top: 3rem;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.faq-item {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Footer */
.calculator-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 2px solid #e2e8f0;
    text-align: center;
    color: var(--secondary-color);
}

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

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

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .calculator-container {
        padding: 1rem;
    }

    .integral-types,
    .functions-grid,
    .concept-cards,
    .faq-grid {
        grid-template-columns: 1fr;
    }

    .input-wrapper {
        flex-direction: column;
        align-items: stretch;
    }

    .integral-symbol {
        text-align: center;
    }
}