/* ===========================================
   CSS MODERNO - PURPLE & WHITE THEME
   =========================================== */

:root {
    --primary-purple: #6a0dad;
    --secondary-purple: #8e24aa;
    --dark-purple: #4a148c;
    --light-purple: #f3e5f5;
    --white: #ffffff;
    --text-dark: #333333;
    --text-light: #f8f9fa;
    --transition-speed: 0.3s;
}

/* 1. ESTILOS GLOBALES */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    background-color: #fdfdfd;
}

a {
    color: var(--primary-purple);
    text-decoration: none;
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--dark-purple);
}

/* Sobrescribir botones de Bootstrap */
.btn-primary {
    background-color: var(--primary-purple);
    border-color: var(--primary-purple);
    transition: all var(--transition-speed);
}

.btn-primary:hover {
    background-color: var(--dark-purple);
    border-color: var(--dark-purple);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(106, 13, 173, 0.3);
}

.btn-outline-primary {
    color: var(--primary-purple);
    border-color: var(--primary-purple);
    transition: all var(--transition-speed);
}

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

.text-primary {
    color: var(--primary-purple) !important;
}

.text-purple {
    color: var(--primary-purple) !important;
}

/* Hover Lift Effect */
.hover-lift {
    transition: all var(--transition-speed) ease;
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15) !important;
}

/* Footer hover text */
.hover-text-white:hover {
    color: white !important;
}

/* 2. TOPHAT - Barra superior */
#tophat {
    display: flex;
    justify-content: flex-end;
    padding: 0.5rem 1rem;
    background-color: var(--white);
    border-bottom: 1px solid #eee;
}

#tophat ul li a {
    font-size: 12px;
    color: #666;
    font-weight: 500;
    transition: color var(--transition-speed);
}

#tophat ul li a:hover {
    color: var(--primary-purple);
}

/* Navbar spacing */
.navbar-nav .nav-item {
    margin: 0 0.5rem;
}

.navbar-nav .nav-link {
    padding: 0.5rem 1rem;
    font-weight: 500;
}

/* 3. JUMBOTRON - Hero con imagen overlay */
.jumbotron {
    padding: 1rem;
    margin-bottom: 0;
}

#img-jumbotron {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 12px;
}

.card-img-overlay {
    background: linear-gradient(to right, rgba(74, 20, 140, 0.85), rgba(106, 13, 173, 0.4));
    padding: 1.5rem;
    border-radius: 12px;
    color: var(--white);
}

.card-img-overlay .display-4 {
    font-size: 1.8rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.card-img-overlay .lead,
.card-img-overlay p {
    font-size: 0.95rem;
    font-weight: 400;
}

/* 4. GRID DE CURSOS - Grid responsivo de tarjetas */
.cursos-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem 1rem;
    justify-items: center;
}

.grid-item {
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    width: 100%;
    background: white;
    transition: all var(--transition-speed);
    border: 1px solid rgba(0,0,0,0.05);
}

.grid-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(106, 13, 173, 0.15);
    border-color: var(--light-purple);
}

.grid-item .card-img-top {
    height: 220px;
    width: 100%;
    object-fit: cover;
}

.grid-item .card-body {
    padding: 1.5rem;
}

.grid-item .card-title {
    color: var(--dark-purple);
    font-weight: 600;
}

/* 5. ACCORDION - Redes sociales */
.accordion-item {
    border: 1px solid #eee;
    border-radius: 12px !important;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
    transition: box-shadow var(--transition-speed);
}

.accordion-item:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.accordion-button {
    padding: 1.2rem;
    background: white;
    color: var(--text-dark);
    font-weight: 600;
    border-radius: 12px !important;
}

.accordion-button:not(.collapsed) {
    background-color: var(--light-purple);
    color: var(--dark-purple);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(106, 13, 173, 0.25);
    border-color: var(--primary-purple);
}

.accordion-button::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236a0dad'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

.accordion-button:not(.collapsed)::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%234a148c'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}

/* 6. IMÁGENES CLICKEABLES - Con efecto hover */
.clickable-image-container {
    position: relative;
    cursor: pointer;
    border-radius: 16px;
    overflow: hidden;
    transition: transform var(--transition-speed);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.clickable-image-container:hover {
    transform: scale(1.03);
    box-shadow: 0 8px 20px rgba(106, 13, 173, 0.2);
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(74, 20, 140, 0.9), transparent);
    color: white;
    padding: 1.5rem;
    text-align: center;
    font-weight: 600;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.clickable-image-container:hover .image-overlay {
    opacity: 1;
}

/* 7. EFECTOS EN CARDS GENERALES */
.card {
    border: none;
    border-radius: 16px;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.card.shadow, .card.shadow-sm {
    box-shadow: 0 10px 30px rgba(0,0,0,0.08) !important;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.12) !important;
}

.card-title {
    color: var(--dark-purple);
    font-weight: 700;
}

/* 8. SECCIONES DE FONDO */
.bg-purple-light {
    background-color: var(--light-purple) !important;
}

.bg-purple-dark {
    background-color: var(--dark-purple) !important;
    color: white;
}

/* ==========================================
   MEDIA QUERIES - RESPONSIVE
   ========================================== */

/* TABLET: 600px+ */
@media (min-width: 600px) {
    .cursos-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 2rem;
    }

    #tophat {
        padding: 0.5rem 2rem;
    }

    .jumbotron {
        padding: 1rem 2rem;
    }

    #img-jumbotron {
        height: 400px;
    }

    .card-img-overlay .display-4 {
        font-size: 2.5rem;
    }

    .card-img-overlay .lead,
    .card-img-overlay p {
        font-size: 1.1rem;
    }
}

/* DESKTOP: 900px+ */
@media (min-width: 900px) {
    .cursos-grid {
        grid-template-columns: repeat(3, 1fr);
        padding: 3rem 90px;
        gap: 2.5rem;
    }

    #tophat {
        padding: 0.5rem 90px;
    }

    .jumbotron {
        padding: 2rem 90px;
    }

    #img-jumbotron {
        height: 550px;
    }

    .card-img-overlay {
        padding: 4rem;
        background: linear-gradient(to right, rgba(74, 20, 140, 0.9), rgba(106, 13, 173, 0.3));
    }

    .card-img-overlay .display-4 {
        font-size: 3.5rem;
    }

    .card-img-overlay .lead {
        font-size: 1.4rem;
    }
}

/* ===========================================
   MEJORAS VISUALES MODERNAS
   =========================================== */

/* Badges personalizados */
.badge {
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 0.5rem 1rem;
}

.bg-purple-light {
    background-color: var(--light-purple) !important;
}

.bg-purple-dark {
    background-color: var(--dark-purple) !important;
}

/* Gradiente para headers */
.gradient-purple {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--secondary-purple) 100%);
}

/* Efecto de sombra para cards elevadas */
.shadow-lg-hover {
    transition: box-shadow var(--transition-speed);
}

.shadow-lg-hover:hover {
    box-shadow: 0 1rem 3rem rgba(0,0,0,.175) !important;
}

/* Position relative para badges en esquina */
.position-relative {
    position: relative;
}

/* Sticky navbar effect */
.sticky-top {
    position: sticky;
    top: 0;
    z-index: 1020;
}

/* Border radius improvements */
.rounded-4 {
    border-radius: 1rem !important;
}

/* Icon spacing */
.bi {
    vertical-align: middle;
}

/* Footer styles */
footer a {
    transition: all var(--transition-speed);
}

footer .social-icons a {
    display: inline-block;
    transition: transform var(--transition-speed);
}

footer .social-icons a:hover {
    transform: translateY(-3px);
}

/* Card body padding improvements */
.card-body {
    padding: 1.5rem;
}

/* Image corner badges */
.position-absolute {
    position: absolute;
}

/* Opacity utilities */
.opacity-90 {
    opacity: 0.9;
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.5) !important;
}

/* Additional button improvements */
.btn {
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all var(--transition-speed);
}

.btn i {
    margin-right: 0.5rem;
}

.btn-lg {
    padding: 1rem 2rem;
}

/* Mejoras para las tarjetas de redes sociales */
.card.h-100 {
    height: 100%;
    transition: all var(--transition-speed) ease;
}

/* Background color utilities for icons */
.bg-opacity-10 {
    --bs-bg-opacity: 0.1;
}

.bg-opacity-25 {
    --bs-bg-opacity: 0.25;
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}