/* Tabs de modo */
.mode-tabs {
    display: flex;
    border: 2px solid var(--border, #e2e8f0);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.mode-tab {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-muted, #64748b);
    cursor: pointer;
    transition: all 0.18s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-width: 0;
    overflow: hidden;
}

.mode-tab:not(:last-child) {
    border-right: 2px solid var(--border, #e2e8f0);
}

.mode-tab.active {
    background: var(--primary, #2563eb);
    color: #fff;
}

.mode-tab:not(.active):hover {
    background: rgba(37, 99, 235, 0.06);
    color: var(--primary, #2563eb);
}

/* Sub-tabs de entrada (Texto / Archivo) */
.input-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.input-tab {
    padding: 0.35rem 0.9rem;
    border: 1.5px solid var(--border, #e2e8f0);
    border-radius: 20px;
    background: transparent;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted, #64748b);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.input-tab.active {
    border-color: var(--primary, #2563eb);
    background: var(--primary, #2563eb);
    color: #fff;
}

.input-tab:not(.active):hover {
    border-color: var(--primary, #2563eb);
    color: var(--primary, #2563eb);
}

/* Textarea */
.b64-textarea {
    width: 100%;
    min-height: 160px;
    padding: 0.9rem 1rem;
    border: 2px solid var(--border, #e2e8f0);
    border-radius: 10px;
    font-family: 'Ubuntu', monospace, sans-serif;
    font-size: 0.875rem;
    color: var(--text, #1e293b);
    background: var(--bg-input, #f8fafc);
    resize: vertical;
    transition: border-color 0.18s, box-shadow 0.18s;
    box-sizing: border-box;
    line-height: 1.6;
    overflow-wrap: break-word;
    word-break: break-all;
}

.b64-textarea:focus {
    outline: none;
    border-color: var(--primary, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
    background: #fff;
}

.b64-textarea.has-error {
    border-color: #ef4444;
}

/* Zona de subida de archivo */
.file-drop-zone {
    border: 2px dashed var(--border, #cbd5e1);
    border-radius: 12px;
    padding: 2rem 1.5rem;
    text-align: center;
    background: var(--bg-alt, #f8fafc);
    cursor: pointer;
    transition: border-color 0.18s, background 0.18s;
    display: none;
    box-sizing: border-box;
}

.file-drop-zone.active-drop {
    border-color: var(--primary, #2563eb);
    background: rgba(37, 99, 235, 0.04);
}

.file-drop-zone:hover {
    border-color: var(--primary, #2563eb);
}

.file-drop-zone i {
    font-size: 2.2rem;
    color: var(--text-muted, #94a3b8);
    margin-bottom: 0.6rem;
}

.file-drop-zone p {
    font-size: 0.875rem;
    color: var(--text-muted, #64748b);
    font-family: 'Montserrat', sans-serif;
    margin: 0 0 0.5rem;
}

.file-drop-zone .file-size-hint {
    font-size: 0.75rem;
    color: var(--text-muted, #94a3b8);
}

.file-drop-zone input[type="file"] {
    display: none;
}

/* Info del archivo seleccionado */
.file-info {
    display: none;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(37, 99, 235, 0.06);
    border: 1.5px solid var(--primary, #2563eb);
    border-radius: 10px;
    margin-top: 0.75rem;
    box-sizing: border-box;
}

.file-info i {
    color: var(--primary, #2563eb);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.file-info-text {
    flex: 1;
    font-family: 'Montserrat', sans-serif;
    min-width: 0;
}

.file-info-name {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text, #1e293b);
    word-break: break-all;
    overflow-wrap: break-word;
}

.file-info-size {
    font-size: 0.75rem;
    color: var(--text-muted, #64748b);
}

.file-clear-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted, #94a3b8);
    padding: 0.25rem;
    font-size: 1rem;
    transition: color 0.15s;
    flex-shrink: 0;
}

.file-clear-btn:hover {
    color: #ef4444;
}

/* Opciones de codificación */
.encode-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 1rem 0;
    align-items: center;
}

.encode-options label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: 'Montserrat', sans-serif;
    color: var(--text, #1e293b);
    cursor: pointer;
    min-width: 0;
}

.encode-options input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary, #2563eb);
    cursor: pointer;
    flex-shrink: 0;
}

.encode-options .charset-wrap {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    font-family: 'Montserrat', sans-serif;
    color: var(--text, #1e293b);
    flex-wrap: wrap;
}

.encode-options .charset-wrap select {
    border: 1.5px solid var(--border, #e2e8f0);
    border-radius: 6px;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    color: var(--text, #1e293b);
    background: var(--bg-alt, #f1f5f9);
    cursor: pointer;
    max-width: 100%;
}

/* Panel de resultado */
.result-panel {
    margin-top: 1.5rem;
    display: none;
}

/* Cabecera del panel de resultado */
.result-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.result-panel-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    font-family: 'Montserrat', sans-serif;
    color: var(--text, #1e293b);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.result-panel-header h3 i {
    color: var(--primary, #2563eb);
}

/* Botones de acción del resultado */
.result-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.stat-chips {
    display: flex;
    padding: 0.2rem;
}

.btn-action {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    border: 1.5px solid var(--border, #e2e8f0);
    border-radius: 8px;
    background: transparent;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted, #64748b);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

.btn-action:hover {
    border-color: var(--primary, #2563eb);
    color: var(--primary, #2563eb);
    background: rgba(37, 99, 235, 0.05);
}

.btn-action.btn-primary-action {
    border-color: var(--primary, #2563eb);
    background: var(--primary, #2563eb);
    color: #fff;
}

.btn-action.btn-primary-action:hover {
    background: #1d4ed8;
}

.btn-action.success {
    border-color: #16a34a;
    background: rgba(34, 197, 94, 0.08);
    color: #16a34a;
}

/* Estadísticas del resultado (chips) */
.result-stats {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.2rem;
}

.stat-chip {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.7rem;
    background: var(--bg-alt, #f1f5f9);
    border-radius: 20px;
    font-size: 0.75rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    color: var(--text-muted, #64748b);
    white-space: nowrap;
    flex-shrink: 0;
}

.stat-chip i {
    color: var(--primary, #2563eb);
    font-size: 0.7rem;
}

/* Previsualización de imagen  */
.img-preview-wrap {
    display: none;
    margin-top: 0.75rem;
    text-align: center;
}

.img-preview-wrap img {
    max-width: 100%;
    max-height: 220px;
    border-radius: 10px;
    border: 1px solid var(--border, #e2e8f0);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.img-preview-wrap p {
    font-size: 0.75rem;
    color: var(--text-muted, #94a3b8);
    font-family: 'Montserrat', sans-serif;
    margin-top: 0.4rem;
}

/* Insignia de privacidad */
.privacy-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    background: rgba(34, 197, 94, 0.08);
    border: 1.5px solid rgba(34, 197, 94, 0.3);
    border-radius: 20px;
    font-size: 0.78rem;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    color: #16a34a;
    margin-bottom: 1.25rem;
    width: 100%;
    box-sizing: border-box;
    flex-wrap: wrap;
}

/* Tabla de caracteres Base64  */
.b64-alphabet {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(38px, 1fr));
    gap: 0.3rem;
    margin-top: 0.75rem;
}

.b64-char {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.35rem 0.2rem;
    background: var(--bg-alt, #f8fafc);
    border: 1px solid var(--border, #e2e8f0);
    border-radius: 6px;
    text-align: center;
}

.b64-char .bc-sym {
    font-family: 'Ubuntu', monospace, sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--primary, #2563eb);
}

.b64-char .bc-idx {
    font-size: 0.62rem;
    color: var(--text-muted, #94a3b8);
    font-family: 'Montserrat', sans-serif;
}

/* Responsive*/
@media (max-width: 600px) {
    .mode-tab {
        font-size: 0.78rem;
        padding: 0.65rem 0.5rem;
        gap: 0.3rem;
    }

    .mode-tab i {
        display: none;
    }

    .b64-alphabet {
        grid-template-columns: repeat(auto-fill, minmax(32px, 1fr));
    }
}

@media (max-width: 480px) {

    .mode-tabs {
        border-radius: 10px;
    }

    .mode-tab {
        font-size: 0.72rem;
        padding: 0.6rem 0.35rem;
    }

    /*  Textarea: padding reducido para ganar espacio interior  */
    .b64-textarea {
        padding: 0.7rem 0.75rem;
        font-size: 0.82rem;
        min-height: 130px;
    }

    /*  Chips de estadísticas: apilar en 2 por línea  */
    .result-stats {
        gap: 0.5rem;
    }

    .stat-chip {
        font-size: 0.7rem;
        padding: 0.25rem 0.55rem;
    }

    /*  Botones de acción: ancho completo para facilitar el toque  */
    .result-actions {
        width: 100%;
    }

    .btn-action {
        flex: 1;
        justify-content: center;
        font-size: 0.72rem;
        padding: 0.4rem 0.5rem;
    }

    /*  Insignia de privacidad: fuente más pequeña  */
    .privacy-badge {
        font-size: 0.72rem;
        padding: 0.4rem 0.75rem;
    }

    /*  Drop zone: padding reducido  */
    .file-drop-zone {
        padding: 1.5rem 1rem;
    }

    .file-drop-zone p {
        font-size: 0.8rem;
    }
}