:root {
    --primary-color: #0B1B34;
    --secondary-color: #162642;
    --accent-color: #E61E28;
    --accent-hover: #c41820;
    --text-dark: #2B2B2B;
    --text-light: #FFFFFF;
    --text-gray: #6B7280;
    --bg-light: #F8F9FA;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --container-width: 1200px;
}

/* UX: Scroll suave a las secciones */
html {
    scroll-behavior: smooth;
}

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

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* UX & Accesibilidad: Estados de focus claros para navegación con teclado */
a:focus, button:focus, article:focus, input:focus {
    outline: 3px solid var(--accent-color);
    outline-offset: 2px;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header UX: Efecto Glassmorphism (Vidrio Esmerilado) */
.header {
    background-color: rgba(11, 27, 52, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: padding 0.3s ease;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    outline: none; /* Focus outline handled globally */
}

.logo img {
    height: 50px;
    border-radius: 5px;
}

.logo-text {
    color: var(--text-light);
    display: flex;
    flex-direction: column;
}

.logo-text .brand {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
}

.logo-text .sub-brand {
    font-size: 0.75rem;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.nav-container {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links li a {
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    position: relative;
    padding: 5px 0;
}

/* UX: Microinteracción en menú con borde animado */
.nav-links li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -2px;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-links li a:hover::after, .nav-links li a.active::after {
    width: 100%;
}

.nav-links li a:hover, .nav-links li a.active {
    color: var(--accent-color);
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-light);
    font-size: 1.8rem;
    cursor: pointer;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 5px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

/* UX: Elevación en botones primarios */
.btn-primary {
    background-color: var(--accent-color);
    color: var(--text-light);
    box-shadow: 0 4px 6px rgba(230, 30, 40, 0.2);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(230, 30, 40, 0.4);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-light);
    border: 1px solid var(--text-light);
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* UX: Animaciones Fade-In controladas por IntersectionObserver */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    visibility: hidden;
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, visibility, transform;
}
.fade-in-section.is-visible {
    opacity: 1;
    transform: none;
    visibility: visible;
}

/* Hero Section */
.hero {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 80px 0 60px;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, rgba(230,30,40,0.15) 0%, rgba(11,27,52,0) 70%);
    z-index: 1;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-subheading {
    color: var(--accent-color);
    font-size: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 15px;
    font-family: var(--font-heading);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.hero-title .highlight {
    color: var(--accent-color);
    display: block;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: #cbd5e1;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.hero-features {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    font-weight: 600;
}

.hero-feature i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

/* Services Section */
.services-section {
    padding: 100px 0;
    background-color: #ffffff;
    text-align: center;
}

.section-subtitle {
    color: var(--accent-color);
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-title {
    font-size: 2.2rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-desc {
    color: var(--text-gray);
    margin-bottom: 60px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

/* UX: Tarjetas interactivas con salto visual */
.service-card {
    background: #fff;
    padding: 40px 20px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.03);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    border-bottom: 4px solid transparent;
    cursor: pointer;
    text-align: center;
}

.service-card:hover, .service-card:focus-within {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    border-bottom: 4px solid var(--accent-color);
}

.service-icon {
    width: 75px;
    height: 75px;
    background-color: rgba(230, 30, 40, 0.05);
    color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 20px;
    transition: all 0.4s ease;
}

.service-card:hover .service-icon, .service-card:focus-within .service-icon {
    background-color: var(--accent-color);
    color: var(--text-light);
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--text-gray);
}

/* Features Banner */
.features-banner {
    background-color: var(--secondary-color);
    color: var(--text-light);
    padding: 50px 0;
}

.features-banner .container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
}

.banner-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.banner-item i {
    font-size: 2.5rem;
    color: var(--accent-color);
    opacity: 0.9;
}

.banner-text h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.banner-text p {
    font-size: 0.85rem;
    color: #cbd5e1;
}

/* Detail Section */
.detail-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr 1fr;
    gap: 40px;
    align-items: center;
}

.detail-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.red-line {
    width: 60px;
    height: 4px;
    background-color: var(--accent-color);
    margin-bottom: 30px;
}

.check-list {
    list-style: none;
    margin-bottom: 40px;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    font-weight: 600;
    color: var(--text-dark);
    font-size: 1.05rem;
}

.check-list li i {
    color: var(--accent-color);
}

.detail-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.appointment-card {
    background-color: var(--accent-color);
    color: var(--text-light);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(230, 30, 40, 0.2);
}

.appointment-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.appointment-card p {
    font-size: 0.95rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

.contact-info-list {
    list-style: none;
    margin-bottom: 30px;
}

.contact-info-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.contact-info-list li i {
    font-size: 1.3rem;
}

.btn-white {
    background-color: var(--text-light);
    color: var(--accent-color);
    width: 100%;
}

.btn-white:hover {
    background-color: #f1f1f1;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: #cbd5e1;
    padding: 80px 0 30px;
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-logo {
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(230,30,40,0.3);
}

.footer h4 {
    color: var(--text-light);
    font-family: var(--font-heading);
    margin-bottom: 25px;
    font-size: 1.2rem;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 15px;
}

.footer ul li a {
    transition: color 0.3s ease, padding-left 0.3s ease;
}

.footer ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px; /* UX micro-animation */
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 15px;
}

.footer-contact li i {
    margin-top: 5px;
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Floating WhatsApp con UX mejorada */
.floating-whatsapp {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25D366;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 1000;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.floating-whatsapp:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

/* About Section */
.about-section {
    padding: 100px 0;
    background-color: var(--bg-light);
}
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

/* Blog Section (SEO) */
.blog-section {
    padding: 100px 0;
    background-color: #ffffff;
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}
.blog-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: all 0.4s ease;
    cursor: pointer;
    border: 1px solid #eee;
}
.blog-card:hover, .blog-card:focus-within {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}
.blog-image {
    height: 220px;
    overflow: hidden;
}
.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.blog-card:hover .blog-image img {
    transform: scale(1.05);
}
.blog-content {
    padding: 30px;
}
.blog-category {
    color: var(--accent-color);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    display: block;
}
.blog-content h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-dark);
}
.blog-content p {
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 20px;
}
.btn-read-more {
    font-weight: 700;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}
.btn-read-more i {
    color: var(--accent-color);
    transition: transform 0.3s ease;
}
.blog-card:hover .btn-read-more i {
    transform: translateX(5px);
}

/* Article Page Styles */
.article-header {
    padding: 140px 0 100px;
    background-color: var(--primary-color);
    color: var(--text-light);
    text-align: center;
}
.article-category {
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 15px;
}
.article-title {
    font-size: 2.8rem;
    margin: 0 auto 20px;
    max-width: 900px;
    line-height: 1.3;
}
.article-meta {
    color: #cbd5e1;
    font-size: 0.95rem;
}
.article-meta i {
    color: var(--accent-color);
    margin-right: 5px;
}
.article-meta span {
    margin: 0 10px;
}
.article-featured-image {
    width: 100%;
    max-width: 900px;
    height: 500px;
    object-fit: cover;
    border-radius: 12px;
    margin: -60px auto 40px;
    display: block;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    position: relative;
    z-index: 2;
}
.article-body {
    padding: 20px 20px 80px;
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
    color: #444;
}
.article-body h2 {
    color: var(--text-dark);
    margin: 40px 0 20px;
    font-size: 1.8rem;
}
.article-body h3 {
    color: var(--text-dark);
    margin: 30px 0 15px;
    font-size: 1.4rem;
}
.article-body p {
    margin-bottom: 25px;
}
.article-body ul {
    margin: 0 0 25px 25px;
}
.article-body li {
    margin-bottom: 10px;
}
.article-footer {
    max-width: 800px;
    margin: 0 auto 60px;
    padding: 40px;
    background-color: var(--bg-light);
    border-radius: 12px;
    text-align: center;
    border-left: 5px solid var(--accent-color);
}

/* Responsive UX */
@media (max-width: 1024px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }
    .detail-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
    }
    .menu-toggle {
        display: block;
    }
    .nav-container {
        display: none;
        width: 100%;
        flex-direction: column;
        padding-top: 20px;
        gap: 15px;
    }
    .nav-container.active {
        display: flex;
        animation: fadeIn 0.3s ease forwards;
    }
    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }
    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 15px;
        margin-bottom: 10px;
        text-align: center;
    }
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    .hero-features {
        justify-content: center;
    }
    .hero-image {
        margin-top: 40px;
    }
    .hero-buttons {
        justify-content: center;
    }
    .about-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-contact li {
        justify-content: center;
    }
    .social-links {
        justify-content: center;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}