/* Base64 codec  -  extends .sandbox-widget */
.base64-codec.sandbox-widget {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
}

.base64-codec__mode {
    display: inline-flex;
    gap: 0.35rem;
    padding: 0.25rem;
    margin-bottom: 1rem;
    border: 1px solid var(--sw-border);
    border-radius: 10px;
    background: var(--sw-surface);
}

.base64-codec__mode-btn {
    padding: 0.45rem 1rem;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--sw-muted);
    background: transparent;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.base64-codec__mode-btn:hover {
    color: var(--sw-text);
}

.base64-codec__mode-btn.is-active {
    color: var(--sw-heading);
    background: color-mix(in srgb, var(--primary-color) 22%, transparent);
}

.base64-codec__mode-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.base64-codec__options {
    margin-bottom: 0.85rem;
}

.base64-codec__check {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.9rem;
    color: var(--sw-text);
    cursor: pointer;
}

.base64-codec__check input {
    width: 1rem;
    height: 1rem;
    accent-color: var(--primary-color);
}

.base64-codec__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.base64-codec__stats {
    margin: 0 0 0.85rem;
    font-size: 0.9rem;
    color: var(--sw-muted);
    min-height: 1.25rem;
}

.base64-codec__panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.base64-codec__panel {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.base64-codec__panel-title {
    margin-bottom: 0.35rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--sw-heading);
}

.base64-codec__textarea {
    width: 100%;
    min-height: 11rem;
    padding: 0.75rem 0.85rem;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 0.88rem;
    line-height: 1.55;
    border: 1px solid var(--sw-border);
    border-radius: 8px;
    background: var(--sw-surface);
    color: var(--sw-text);
    resize: vertical;
}

.base64-codec__textarea--output {
    background: color-mix(in srgb, var(--sw-surface) 88%, var(--sw-code-bg, #0d0d12) 12%);
}

.base64-codec__textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.base64-codec__message {
    margin: 0.85rem 0 0;
    font-size: 0.9rem;
    color: var(--sw-muted);
}

.base64-codec__message[hidden] {
    display: none;
}

.base64-codec__message--error {
    color: #b91c1c;
}

body[data-theme="dark"] .base64-codec__message--error {
    color: #fca5a5;
}

.base64-codec__message--ok {
    color: #15803d;
}

body[data-theme="dark"] .base64-codec__message--ok {
    color: #86efac;
}

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