/**
 * Estilos para Sistema de Certificados
 * Diseño responsive y accesible
 */

/* Variables CSS */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-radius: 8px;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Contenedor principal del selector */
.selector-certificados-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.selector-header {
    text-align: center;
    margin-bottom: 3rem;
}

.selector-header h1 {
    color: var(--text-primary);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.selector-header .descripcion {
    color: var(--text-secondary);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Métodos de selección */
.metodo-seleccion h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Dropdown */
.dropdown-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.certificado-dropdown {
    min-width: 300px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: white;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.certificado-dropdown:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Botones */
.btn-primary, .btn-generar, .btn-validar, .btn-volver, .btn-inicio {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1.5;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.6;
}

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

.btn-generar:hover {
    background: #047857;
    color: white;
    text-decoration: none;
}

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

.btn-validar:hover {
    background: #b45309;
    color: white;
    text-decoration: none;
}

.btn-volver, .btn-inicio {
    background: var(--secondary-color);
    color: white;
}

.btn-volver:hover, .btn-inicio:hover {
    background: #475569;
    color: white;
    text-decoration: none;
}

/* Grid de botones */
.botones-container {
    margin-top: 2rem;
}

.botones-container h4 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-size: 1.25rem;
}

.botones-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

/* Cards de certificados */
.certificado-card {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.certificado-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.certificado-card h5 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.certificado-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.card-actions .btn-generar,
.card-actions .btn-validar {
    flex: 1;
    min-width: 100px;
}

/* Contenedores de páginas individuales */
.certificado-container,
.validacion-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

.certificado-header,
.validacion-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.certificado-header h1,
.validacion-header h1 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.certificado-header .descripcion,
.validacion-header .descripcion {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.certificado-formulario,
.validacion-formulario {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
    border: 1px solid var(--border-color);
}

/* Navegación superior */
.navegacion-certificados-top {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.nav-home {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-home:hover {
    background: var(--primary-hover);
    color: white;
    text-decoration: none;
}

/* Dropdown de navegación */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown-btn {
    background: var(--secondary-color);
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-dropdown-btn:hover {
    background: #475569;
}

.nav-dropdown-content {
    display: none;
    position: absolute;
    background: white;
    min-width: 250px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    top: 100%;
    left: 0;
    margin-top: 0.25rem;
}

.nav-dropdown:hover .nav-dropdown-content {
    display: block;
}

.nav-dropdown-content a {
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    text-decoration: none;
    display: block;
    transition: all 0.3s ease;
}

.nav-dropdown-content a:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

/* Navegación inferior */
.navegacion-certificados {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

/* Estilos para validación QR */
.qr-validation-info {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--border-radius);
    border: 2px solid #0ea5e9;
    margin: 2rem 0;
}

.qr-validation-info h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.qr-validation-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.qr-icon {
    font-size: 4rem;
    margin: 1.5rem 0;
    opacity: 0.7;
}

.validation-result {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 2px solid var(--success-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
}

.validation-result h3 {
    color: var(--success-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 600;
}

.validation-details {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid #d1fae5;
}

.validation-details p {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.validation-details p:last-child {
    margin-bottom: 0;
}

.validation-details strong {
    color: var(--text-primary);
    font-weight: 600;
}

.validation-status {
    background: var(--success-color);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
    margin-top: 1rem !important;
}

/* Estilos para validación automática por QR */
.validation-result {
    max-width: 700px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
}

.validation-success {
    background: linear-gradient(135deg, #ecfdf5, #d1fae5);
    border: 2px solid var(--success-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.validation-error {
    background: linear-gradient(135deg, #fef2f2, #fecaca);
    border: 2px solid var(--danger-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.validation-details {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.qr-validation-info {
    max-width: 500px;
    margin: 2rem auto;
    padding: 3rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.qr-icon {
    font-size: 4rem;
    margin: 1.5rem 0;
    opacity: 0.8;
}

.validation-timestamp {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 1rem;
    text-align: right;
}

.validation-info {
    color: var(--text-secondary);
    font-style: italic;
}

.validation-status {
    font-weight: 600;
    color: var(--success-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .selector-certificados-container {
        padding: 1rem;
        margin: 1rem;
    }
    
    .selector-header h1 {
        font-size: 2rem;
    }
    
    .dropdown-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .certificado-dropdown {
        min-width: auto;
        width: 100%;
    }
    
    .botones-grid {
        grid-template-columns: 1fr;
    }
    
    .card-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .nav-dropdown-content {
        position: static;
        display: block;
        box-shadow: none;
        border: 1px solid var(--border-color);
        margin-top: 0.5rem;
    }
    
    .nav-dropdown:hover .nav-dropdown-content {
        display: block;
    }
    
    .validation-result,
    .qr-validation-info {
        margin: 1rem;
        padding: 1.5rem;
    }
    
    .qr-icon {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .selector-header h1 {
        font-size: 1.75rem;
    }
    
    .certificado-header h1,
    .validacion-header h1 {
        font-size: 1.5rem;
    }
    
    .certificado-formulario,
    .validacion-formulario {
        padding: 1rem;
    }
}

/* Animaciones */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.selector-certificados-container,
.certificado-container,
.validacion-container {
    animation: fadeIn 0.5s ease-out;
}

/* Accesibilidad */
.btn-primary:focus,
.btn-generar:focus,
.btn-validar:focus,
.btn-volver:focus,
.btn-inicio:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.nav-dropdown-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Estados de carga */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Mejoras para formularios de certificados */
.certificado-formulario form,
.validacion-formulario form {
    max-width: 500px;
    margin: 0 auto;
}

.certificado-formulario .form-field,
.validacion-formulario .form-field {
    margin-bottom: 1.5rem;
}

.certificado-formulario label,
.validacion-formulario label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.certificado-formulario input[type="text"],
.certificado-formulario input[type="number"],
.validacion-formulario input[type="text"],
.validacion-formulario input[type="number"] {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.certificado-formulario input:focus,
.validacion-formulario input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.certificado-formulario input[type="submit"],
.validacion-formulario input[type="submit"] {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.certificado-formulario input[type="submit"]:hover,
.validacion-formulario input[type="submit"]:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* Mensajes de error y éxito */
.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--danger-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.success-message {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: var(--success-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}