:root {
    --primary-color: #6f42c1;
    --primary-dark: #5a32a3;
    --primary-light: rgba(111, 66, 193, 0.1);
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-bg: #f8f9fa;
    --dark-bg: #212529;
    --border-color: #dee2e6;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.15);
}

/* Estilos generales y reset */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Tipografía */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

.section-title {
    position: relative;
    padding-bottom: 1rem;
    margin-bottom: 2rem;
    text-align: center;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* Utilidades de color */
.text-primary { color: var(--primary-color) !important; }
.bg-primary { background-color: var(--primary-color) !important; }
.border-primary { border-color: var(--primary-color) !important; }

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

/* Navegación */
.navbar {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: var(--shadow);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
    border-radius: 6px;
    margin: 0 0.25rem;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
    background-color: var(--primary-light);
}

.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
    font-weight: 600;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(111, 66, 193, 0.05));
}

/* Tarjetas de diseño */
.design-card {
    transition: all 0.3s ease;
    border: none;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.design-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.card-img-top-container {
    overflow: hidden;
    position: relative;
}

.design-card .card-img-top {
    transition: transform 0.5s ease;
    height: 250px;
    object-fit: cover;
}

.design-card:hover .card-img-top {
    transform: scale(1.1);
}

/* Placeholders */
.placeholder-hero {
    background: linear-gradient(45deg, #6c757d, #495057);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    min-height: 400px;
}

.placeholder-about {
    background: linear-gradient(45deg, #e9ecef, #dee2e6);
    color: #6c757d;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    min-height: 300px;
}

/* Botones */
.btn {
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    box-shadow: 0 4px 15px rgba(111, 66, 193, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(111, 66, 193, 0.4);
}

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(111, 66, 193, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #157347);
    border: none;
}

/* Galería de imágenes */
.image-gallery .main-image {
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.thumbnail {
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.thumbnail:hover,
.thumbnail.active {
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.gallery-controls .btn {
    border-radius: 25px;
    padding: 0.5rem 1.5rem;
}

/* Área de subida de archivos */
.file-upload-area {
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px dashed var(--border-color) !important;
    border-radius: 12px;
    background: var(--light-bg);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.file-upload-area:hover {
    border-color: var(--primary-color) !important;
    background: var(--primary-light);
    transform: translateY(-2px);
}

.file-upload-area.dragover {
    border-color: var(--primary-color) !important;
    background: var(--primary-light);
    transform: scale(1.02);
}

/* Formularios */
.form-control, .form-select {
    border-radius: 8px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(111, 66, 193, 0.25);
    transform: translateY(-1px);
}

.form-floating > .form-control:focus,
.form-floating > .form-control:not(:placeholder-shown) {
    border-color: var(--primary-color);
}

.form-floating > label {
    color: var(--secondary-color);
    font-weight: 500;
}

/* Switches personalizados */
.form-switch .form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-switch .form-check-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(111, 66, 193, 0.25);
}

/* Tablas */
.table {
    border-radius: 12px;
    overflow: hidden;
}

.table > :not(caption) > * > * {
    padding: 1rem 0.75rem;
    vertical-align: middle;
}

.table-hover tbody tr {
    transition: all 0.3s ease;
}

.table-hover tbody tr:hover {
    background-color: var(--primary-light) !important;
    transform: translateX(4px);
}

.table-light th {
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color);
    background: var(--light-bg);
}

/* Badges */
.badge {
    font-weight: 500;
    border-radius: 6px;
    padding: 0.5em 0.75em;
}

.badge.bg-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important;
}

/* Paginación */
.pagination {
    gap: 0.5rem;
}

.page-link {
    border-radius: 8px !important;
    border: 2px solid var(--border-color);
    color: var(--primary-color);
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
}

.page-link:hover {
    color: var(--primary-dark);
    background-color: var(--primary-light);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

/* Alertas */
.alert {
    border: none;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.alert-dismissible .btn-close {
    padding: 0.75rem;
}

/* Feature icons */
.feature-icon {
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.feature-icon:hover {
    transform: translateY(-5px) scale(1.1);
}

/* Cards administrativas */
.stat-card {
    transition: all 0.3s ease;
    border-radius: 16px;
    border: none;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.icon-circle {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.stat-card:hover .icon-circle {
    transform: scale(1.1);
}

/* About Page Styles */
.mb-6 {
    margin-bottom: 4rem !important;
}

.about-image-container {
    position: relative;
    overflow: hidden;
}

.about-image {
    transition: transform 0.3s ease;
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.about-image:hover {
    transform: scale(1.02);
}

.about-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(13, 110, 253, 0.1) 0%, rgba(255, 255, 255, 0) 50%);
    pointer-events: none;
}

.about-content p {
    line-height: 1.7;
    font-size: 1.05rem;
}

.value-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15) !important;
}

.value-icon {
    width: 80px;
    height: 80px;
    transition: transform 0.3s ease;
}

.value-card:hover .value-icon {
    transform: scale(1.1);
}

.stats-section {
    background: linear-gradient(135deg, #0d6efd 0%, #0dcaf0 100%);
}

.stat-number {
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

.mission-section {
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 1rem;
    border: 1px solid #dee2e6;
}

.mission-icon {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Responsive About Page */
@media (max-width: 768px) {
    .about-image {
        height: 300px;
    }
    
    .stats-section .display-6 {
        font-size: 2rem;
    }
    
    .mission-section {
        padding: 2rem 1rem;
    }
}

@media (max-width: 576px) {
    .about-content p {
        font-size: 1rem;
    }
    
    .value-icon {
        width: 70px;
        height: 70px;
    }
}

/* Footer */
footer {
    margin-top: auto;
    background: var(--dark-bg) !important;
}

footer a {
    transition: all 0.3s ease;
}

footer a:hover {
    color: #fff !important;
    transform: translateX(4px);
}

/* Scroll personalizado */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Validación de formularios */
.was-validated .form-control:valid,
.form-control.is-valid {
    border-color: var(--success-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
}

.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: var(--danger-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath d='m5.8 3.6.4.4.4-.4'/%3e%3cpath d='M6 7v2'/%3e%3c/svg%3e");
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
    }
    
    .hero-section .display-4 {
        font-size: 2rem;
    }
    
    .design-card {
        margin-bottom: 1.5rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .file-upload-area {
        padding: 2rem 1rem !important;
        min-height: 150px;
    }
    
    .file-upload-area p {
        font-size: 0.9rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem;
        margin: 0.125rem 0;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn-group .btn {
        padding: 0.375rem 0.5rem;
        font-size: 0.8rem;
    }
    
    .feature-icon {
        width: 40px !important;
        height: 40px !important;
    }
}

/* Animaciones */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Estados de carga */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* ===== TARJETAS CLICKEABLES ===== */
.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: all 0.3s ease;
}

.card-link:hover {
    text-decoration: none;
    color: inherit;
    transform: translateY(-2px);
}

/* Mantener los estilos de hover de la tarjeta */
.card-link:hover .design-card {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.card-link:hover .design-card .card-img-top {
    transform: scale(1.1);
}

/* Prevenir que el botón interfiera con el click */
.card-link .btn {
    pointer-events: none;
}

/* Asegurar que los textos mantengan sus colores */
.card-link .card-title {
    color: #212529 !important;
}

.card-link .card-text {
    color: #6c757d !important;
}

/* Efecto visual adicional para indicar que es clickeable */
.card-link .design-card {
    position: relative;
    overflow: hidden;
}

.card-link .design-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: transparent;
    transition: background-color 0.3s ease;
    border-radius: 12px;
    pointer-events: none;
}

.card-link:hover .design-card::after {
    background: rgba(111, 66, 193, 0.03);
}