/* Variables de Diseño (Paleta Dermocosmética Personalizada) */
:root {
    --primary-color: #E41F33;      /* Rojo marca */
    --primary-hover: #C01A2B;      /* Rojo marca oscuro para hover */
    --secondary-color: #2B2830;    /* Oscuro de marca */
    --accent-color: #E41F33;       /* Rojo marca */
    --bg-light: #FFFFFF;           /* Fondo principal blanco */
    --text-dark: #2B2830;          /* Texto primario oscuro */
    --text-muted: #413F44;         /* Texto secundario gris oscuro */
    --white: #ffffff;
    --border-color: #C1C0C2;       /* Color de bordes */
    --card-bg: #F4F4F4;            /* Contenedores / Tarjetas */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --font-main: 'Poppins', sans-serif;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--white);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-card {
    width: 100%;
    justify-content: center;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
}

.btn-card:hover {
    background-color: var(--primary-hover);
    color: var(--white);
    transform: translateY(-2px);
}

/* Navbar */
.navbar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

/* ==========================================================================
   Hero Section con Banner Full Width y Textos en Blanco
   ========================================================================== */
.hero {
    position: relative;
    padding: 100px 0;
    min-height: 520px;
    display: flex;
    align-items: center;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

/* ==========================================================================
   Hero Slider: Animación Suave con Zoom Lento (Ken Burns Effect)
   ========================================================================== */
.hero-slider-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center right;
    background-repeat: no-repeat;
    opacity: 0;
    transform: scale(1);
    /* Transición de opacidad suave para el cambio entre imágenes */
    transition: opacity 1.2s ease-in-out, transform 6s ease-out;
}

/* Estado activo: visible y con micro-zoom progresivo */
.slide-bg.active {
    opacity: 1;
    transform: scale(1.08); /* Se amplía un 8% lentamente */
}

/* Capa Oscura Ligera para asegurar legibilidad */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.35);
    z-index: 2;
}

/* Contenido Principal sobre el Fondo */
.hero-container {
    position: relative;
    z-index: 3;
    width: 100%;
}

.hero-content {
    max-width: 650px;
}

/* Badge en Fondo Oscuro */
.hero-content .badge {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    backdrop-filter: blur(4px);
}

/* Título y Descripción en Blanco */
.hero-title {
    font-size: 2.8rem;
    margin: 15px 0;
    line-height: 1.2;
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-title span {
    color: #FFD1D6;
}

.hero-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 400;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* Tarjeta Módulos Interactivos */
.hero-stats-card {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: inline-flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    backdrop-filter: blur(4px);
}

.hero-stats-card i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.hero-stats-card h4 {
    font-size: 0.95rem;
    color: var(--text-dark);
}

.hero-stats-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.hero-actions {
    display: flex;
    gap: 15px;
}

/* Botones Flotantes del Slider Lateral */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.85);
    color: var(--secondary-color);
    border: 1px solid var(--border-color);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    z-index: 4;
}

.slider-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.prev-btn { left: 20px; }
.next-btn { right: 20px; }

/* Indicadores Puntos de Navegación */
.dots-container {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 4;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background: var(--white);
    width: 26px;
    border-radius: 10px;
}

/* Cursos */
.courses {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.2rem;
    color: var(--text-dark);
}

.section-header p {
    color: var(--text-muted);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.course-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.course-header {
    padding: 30px;
    color: var(--white);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.card-dermo1 { background: linear-gradient(135deg, #2B2830, #413F44); }
.card-dermo2 { background: linear-gradient(135deg, #E41F33, #C01A2B); }

.course-icon { font-size: 2.5rem; opacity: 0.9; }

.course-body {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 10px 0 20px;
}

.course-features {
    list-style: none;
    margin-bottom: 25px;
}

.course-features li {
    font-size: 0.9rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.course-features i { color: var(--primary-color); }

.course-footer {
    margin-top: auto;
}

/* Metodología */
.features-section {
    padding: 80px 0;
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    border-radius: var(--radius-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: #FFFFFF;
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 20px;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 40px 0 20px;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand p {
    color: #C1C0C2;
    font-size: 0.85rem;
    margin-top: 5px;
}

.footer-copy {
    color: #C1C0C2;
    font-size: 0.85rem;
}

/* ==========================================================================
   Adaptación Móvil y Solución de Navegación
   ========================================================================== */
@media (max-width: 768px) {
    /* Navbar compacta visible */
    .nav-container {
        flex-direction: column;
        gap: 12px;
    }

    .nav-menu {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
        width: 100%;
    }

    .nav-link {
        font-size: 0.88rem;
    }

    .nav-menu .btn-outline {
        padding: 6px 14px;
        font-size: 0.85rem;
    }

    /* Hero ajustado a la izquierda */
    .hero {
        padding: 50px 0;
        min-height: 460px;
    }

    .slide-bg {
        background-position: left center;
    }

    .hero-overlay {
        background: rgba(0, 0, 0, 0.45);
    }

    .hero-title {
        font-size: 1.9rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .slider-btn {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .prev-btn { left: 8px; }
    .next-btn { right: 8px; }
}