/* Variables para colores y tipografías */
:root {
    --color-primary: #0a3d62; /* azul oscuro */
    --color-secondary: #e76f51; /* coral */
    --color-accent: #f4b400; /* dorado */
    --color-light: #f9f9f9;
    --color-muted: #faf1e6;
    --color-text: #333;
    --font-heading: 'Merriweather', serif;
    --font-body: 'Source Sans Pro', sans-serif;
}

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    line-height: 1.6;
    background-color: var(--color-light);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
}

a {
    color: var(--color-secondary);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* Contenedores */
.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 0;
}

/* Header */
header {
    background-color: var(--color-primary);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}
.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
}
nav ul {
    list-style: none;
    display: flex;
    gap: 1.2rem;
}
nav a {
    color: #fff;
    font-weight: 600;
    transition: color 0.3s;
}
nav a:hover {
    color: var(--color-accent);
}

/* Hero */
.hero {
    position: relative;
    background-image: url('hero.png');
    background-size: cover;
    background-position: center;
    height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
}
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 61, 98, 0.5);
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    padding: 0 1rem;
}
.hero-content h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}
.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}
.cta-button {
    display: inline-block;
    padding: 0.8rem 1.6rem;
    background-color: var(--color-secondary);
    color: #fff;
    border-radius: 4px;
    font-weight: 600;
    transition: background-color 0.3s;
}
.cta-button:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

/* Articles */
.articles {
    background-color: var(--color-muted);
}
.articles h2 {
    text-align: center;
    font-family: var(--font-heading);
    margin-bottom: 1.5rem;
}
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.article-grid article {
    background: #fff;
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
.article-grid h3 {
    font-family: var(--font-heading);
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}
.article-grid p {
    font-size: 0.95rem;
}

/* Programs */
.programs h2 {
    text-align: center;
    font-family: var(--font-heading);
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}
.program-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}
.program-card {
    background: #fff;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.program-card img {
    height: 160px;
    object-fit: cover;
}
.program-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin: 0.8rem 1rem 0.4rem;
    color: var(--color-primary);
}
.program-card p {
    padding: 0 1rem 1rem;
    flex-grow: 1;
}
.program-card .price {
    background-color: var(--color-secondary);
    color: #fff;
    padding: 0.6rem 1rem;
    text-align: right;
    font-weight: 600;
}

/* Testimonials */
.testimonials {
    background: var(--color-muted);
}
.testimonials h2 {
    text-align: center;
    font-family: var(--font-heading);
    margin-bottom: 1rem;
}
.testimonial-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}
.testimonial-list blockquote {
    background: #fff;
    padding: 1rem 1.2rem;
    border-left: 4px solid var(--color-secondary);
    border-radius: 4px;
    font-style: italic;
}
.review-form {
    background: #fff;
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
.review-form h3 {
    font-family: var(--font-heading);
    margin-bottom: 1rem;
}
.review-form form {
    display: flex;
    flex-direction: column;
}
.review-form input,
.review-form textarea {
    padding: 0.6rem;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.95rem;
}
.review-form textarea {
    min-height: 100px;
    resize: vertical;
}
.btn-primary {
    background-color: var(--color-primary);
    color: #fff;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s;
}
.btn-primary:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
}
.btn-secondary {
    background-color: var(--color-secondary);
    color: #fff;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s;
}
.btn-secondary:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

/* Popup */
.popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}
.popup.hidden {
    display: none;
}
.popup-content {
    background: #fff;
    padding: 2rem;
    border-radius: 6px;
    text-align: center;
    max-width: 350px;
}

/* Contact */
.contact h2 {
    text-align: center;
    font-family: var(--font-heading);
    margin-bottom: 1rem;
    color: var(--color-primary);
}
.contact form {
    background: #fff;
    padding: 1.5rem;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    max-width: 600px;
    margin: 0 auto;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.form-group input {
    padding: 0.6rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}
.checkbox-group {
    display: flex;
    align-items: center;
    margin: 1rem 0;
    font-size: 0.9rem;
}
.checkbox-group input {
    margin-right: 0.5rem;
}
.contact button {
    display: block;
    margin-left: auto;
    background-color: var(--color-secondary);
    color: #fff;
    border: none;
    padding: 0.7rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s;
}
.contact button:hover {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

/* Footer */
footer {
    background-color: var(--color-primary);
    color: #fff;
    padding: 1.5rem 0;
    text-align: center;
}
footer a {
    color: var(--color-accent);
}
footer a:hover {
    text-decoration: underline;
}

/* Responsive adjustments */
@media (min-width: 768px) {
    .testimonial-list {
        grid-template-columns: 1fr 1fr;
    }
    .form-group {
        flex-direction: row;
    }
    .form-group input {
        flex: 1;
    }
}