/* ============================================================================
   ESTILOS: CODIFICADOR BASE64 (Gestión Cero - Procesamiento Local)
   ============================================================================ */

.layout-ancho {
    max-width: 1000px;
    margin: 0 auto;
}

.caja-herramienta {
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 6px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
}

/* Selector de Modo (Codificar / Decodificar) */
.selector-modo {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    justify-content: center;
}

.btn-modo {
    padding: 0.8rem 2rem;
    background: #f1f5f9;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-modo.activo {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

/* Grid de Textos */
.grid-base64 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .grid-base64 {
        grid-template-columns: 1fr;
    }
}

.panel-texto {
    display: flex;
    flex-direction: column;
}

.etiqueta-panel {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.8rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.textarea-axv {
    width: 100%;
    min-height: 250px;
    padding: 1.2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: #fafafa;
    color: var(--text-color);
    font-family: monospace;
    font-size: 0.95rem;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s ease;
}

.textarea-axv:focus {
    border-color: var(--accent-color);
    background: #fff;
}

.textarea-resultado {
    background: #f8fafc;
    border-style: dashed;
}

/* Botón de Copiar */
.btn-copiar {
    background: none;
    border: none;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: opacity 0.2s;
}
.btn-copiar:hover {
    opacity: 0.7;
}
.btn-copiar.exito {
    color: #10b981;
}

/* Mensaje de Error */
#mensajeError {
    color: #ef4444;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    min-height: 20px;
    font-weight: 600;
}

/* Componentes Compartidos (SEO) */
.titulo-seo-bloque {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 2rem;
    text-align: center;
}
.contenedor-acordeones {
    margin-bottom: 2rem;
}
.acordeon-axv {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}
.acordeon-axv[open] {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}
.acordeon-axv summary {
    padding: 1.2rem 1.5rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    list-style: none;
    position: relative;
    outline: none;
}
.acordeon-axv summary::-webkit-details-marker {
    display: none;
}
.acordeon-axv summary::after {
    content: "+";
    position: absolute;
    right: 1.5rem;
    color: var(--text-muted);
    font-size: 1.2rem;
    font-weight: bold;
    transition: transform 0.2s ease;
}
.acordeon-axv[open] summary::after {
    content: "−";
    color: var(--accent-color);
}
.acordeon-contenido {
    padding: 0 1.5rem 1.5rem 1.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    border-top: 1px solid transparent;
}