/*
 * Hoja de estilos principal para el sitio de Donker.
 * Se ha diseñado con un enfoque responsivo y accesible.
 */

/* Variables de color para facilitar cambios en el futuro */
:root {
    --color-primary: #0052cc;
    --color-primary-light: #0171e2;
    --color-accent: #f5a623;
    --color-light-bg: #f9f9f9;
    --color-dark-text: #333;
    --color-muted: #555;
}

/* Ajustes globales */
html {
    box-sizing: border-box;
}

*, *::before, *::after {
    box-sizing: inherit;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    color: var(--color-dark-text);
    background-color: white;
}

/* Contenedor central para limitar el ancho y centrar contenido */
.container {
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}

/* Cabecera */
.header {
    background-color: var(--color-primary);
    color: #fff;
    padding-top: 10px;
    padding-bottom: 10px;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav a {
    color: #fff;
    margin-left: 20px;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease-in-out;
}

.nav a:hover {
    color: var(--color-accent);
}

/* Sección héroe */
.hero {
    background-color: var(--color-primary-light);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

.hero-container h1 {
    font-size: 2.4rem;
    margin-top: 0;
    margin-bottom: 20px;
}

.hero-container p {
    font-size: 1.1rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 30px;
}

.cta-button {
    display: inline-block;
    background-color: var(--color-accent);
    color: #fff;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.2s ease-in-out;
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    background-color: #e5941d;
}

/* Sección de servicios */
.services {
    padding: 60px 0;
}

.services h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 40px;
    font-size: 2rem;
    color: var(--color-primary);
}

.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.card {
    background-color: var(--color-light-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card h3 {
    margin-top: 0;
    color: var(--color-primary);
    font-size: 1.2rem;
}

.card p {
    margin-bottom: 0;
}

/* Estilos para precios en cursos */
.price {
    margin-top: 10px;
    font-weight: bold;
    color: var(--color-primary);
}

/* Formulario de contacto */
.contact-form {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    flex-direction: column;
}

.contact-form label {
    margin-top: 12px;
    margin-bottom: 4px;
    font-weight: bold;
    color: var(--color-primary);
}

.contact-form input,
.contact-form textarea {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
}

.contact-form textarea {
    resize: vertical;
}

.contact-form button {
    margin-top: 20px;
    align-self: flex-start;
}

/* Pie de página */
.footer {
    background-color: #f2f2f2;
    color: var(--color-muted);
    text-align: center;
    padding: 20px 0;
    font-size: 0.9rem;
}

/* Media queries para pantallas pequeñas */
@media (max-width: 600px) {
    .header-container {
        flex-direction: column;
        align-items: flex-start;
    }
    .nav {
        margin-top: 10px;
        display: flex;
        flex-wrap: wrap;
    }
    .nav a {
        margin-left: 0;
        margin-right: 15px;
        margin-bottom: 10px;
    }
    .hero {
        padding: 60px 0;
    }
    .hero-container h1 {
        font-size: 2rem;
    }
}