.page-tool--base64-encoder-decoder .tool-page {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.page-tool--base64-encoder-decoder .b64-controls__body {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 16px 28px;
}

.page-tool--base64-encoder-decoder .b64-fieldset[hidden],
.page-tool--base64-encoder-decoder .b64-option[hidden] {
    display: none;
}

.page-tool--base64-encoder-decoder .b64-fieldset {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 0;
    padding: 0;
    border: 0;
}

.page-tool--base64-encoder-decoder .b64-fieldset legend {
    padding: 0;
}

.page-tool--base64-encoder-decoder .b64-toggle {
    display: inline-flex;
    gap: 3px;
    padding: 3px;
    border: 1px solid var(--line-2);
    border-radius: var(--radius);
    background: var(--surface-2);
}

.page-tool--base64-encoder-decoder .b64-toggle__option {
    position: relative;
    display: inline-flex;
    margin: 0;
}

.page-tool--base64-encoder-decoder .b64-toggle__option input {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: 0;
    opacity: 0;
}

.page-tool--base64-encoder-decoder .b64-toggle__option span {
    display: block;
    padding: 0.4rem 1.1rem;
    border-radius: var(--radius-sm);
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
}

.page-tool--base64-encoder-decoder .b64-toggle__option span code {
    font-family: var(--font-mono);
    font-weight: 600;
    opacity: 0.85;
}

.page-tool--base64-encoder-decoder .b64-toggle__option input:checked + span {
    background: var(--surface);
    color: var(--ink);
    box-shadow: var(--shadow-sm);
}

.page-tool--base64-encoder-decoder .b64-toggle__option input:focus-visible + span {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.page-tool--base64-encoder-decoder .b64-option {
    flex: 1 1 260px;
    max-width: 460px;
}

.page-tool--base64-encoder-decoder .b64-check {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: var(--muted);
    font-size: 0.84rem;
    line-height: 1.45;
}

.page-tool--base64-encoder-decoder .b64-check code,
.page-tool--base64-encoder-decoder .tool-hint code,
.page-tool--base64-encoder-decoder .b64-about__text code {
    padding: 0.05rem 0.3rem;
    border: 1px solid var(--line);
    border-radius: var(--radius-xs);
    background: var(--surface-3);
    color: var(--ink-2);
    font-family: var(--font-mono);
}

.page-tool--base64-encoder-decoder .tool-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.5;
}

.page-tool--base64-encoder-decoder .tool-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
    align-items: stretch;
}

.page-tool--base64-encoder-decoder .b64-pane {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.page-tool--base64-encoder-decoder .b64-pane__body {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    min-height: 0;
}

.page-tool--base64-encoder-decoder .b64-textarea {
    display: block;
    flex: 1 1 auto;
    min-height: 18rem;
    padding: 14px 16px;
    border: 0;
    border-radius: 0;
    background: var(--surface);
    font-family: var(--font-mono);
    font-size: 0.86rem;
    line-height: 1.55;
    overflow-wrap: anywhere;
}

.page-tool--base64-encoder-decoder .b64-textarea[hidden] {
    display: none;
}

.page-tool--base64-encoder-decoder .b64-textarea--output {
    background: var(--surface-2);
    white-space: pre-wrap;
}

.page-tool--base64-encoder-decoder .b64-textarea:focus {
    box-shadow: none;
}

.page-tool--base64-encoder-decoder .b64-status {
    margin: 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: var(--surface-2);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
}

.page-tool--base64-encoder-decoder .b64-status.status--error {
    background: var(--danger-soft);
    color: var(--danger);
}

.page-tool--base64-encoder-decoder .b64-status.status--success {
    background: var(--success-soft);
    color: var(--success);
}

.page-tool--base64-encoder-decoder .b64-status.status--info {
    background: var(--surface-2);
}

.page-tool--base64-encoder-decoder .b64-file {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    flex: 1 1 auto;
}

.page-tool--base64-encoder-decoder .b64-file[hidden] {
    display: none;
}

.page-tool--base64-encoder-decoder .b64-dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 12rem;
    padding: 24px;
    border: 1px dashed var(--line-2);
    border-radius: var(--radius);
    background: var(--surface-2);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.page-tool--base64-encoder-decoder .b64-dropzone:hover,
.page-tool--base64-encoder-decoder .b64-dropzone:focus-within,
.page-tool--base64-encoder-decoder .b64-dropzone.is-dragging {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.page-tool--base64-encoder-decoder .b64-dropzone__title {
    font-weight: 600;
    color: var(--ink);
}

.page-tool--base64-encoder-decoder .b64-dropzone__hint {
    color: var(--muted);
    font-size: 0.82rem;
}

.page-tool--base64-encoder-decoder .b64-file__meta {
    margin: 0;
    color: var(--ink-2);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    overflow-wrap: anywhere;
}

.page-tool--base64-encoder-decoder .b64-file__meta:empty {
    display: none;
}

.page-tool--base64-encoder-decoder .b64-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--line);
    background: var(--surface-2);
}

.page-tool--base64-encoder-decoder .b64-actions .btn[hidden] {
    display: none;
}

.page-tool--base64-encoder-decoder .b64-about__text {
    max-width: 80ch;
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 860px) {
    .page-tool--base64-encoder-decoder .tool-workspace {
        grid-template-columns: 1fr;
    }

    .page-tool--base64-encoder-decoder .b64-textarea {
        min-height: 12rem;
    }
}

@media (max-width: 640px) {
    .page-tool--base64-encoder-decoder .b64-controls__body {
        flex-direction: column;
        align-items: stretch;
    }

    .page-tool--base64-encoder-decoder .b64-option {
        max-width: none;
    }
}