.mde-wrap {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    overflow: hidden;
}

/* ---- Tab bar ---- */

.mde-tabs {
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface-warm);
    padding: 0;
    gap: 0;
    min-height: 38px;
    flex-shrink: 0;
}

.mde-tab {
    padding: 0.45rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: var(--font-body);
    color: var(--color-text-muted);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
    white-space: nowrap;
}

    .mde-tab:hover {
        color: var(--color-primary);
    }

    .mde-tab.active {
        color: var(--color-primary);
        border-bottom-color: var(--color-primary);
    }

.mde-tab-spacer {
    flex: 1;
}

.mde-btn-expand {
    padding: 0.35rem 0.7rem;
    font-size: 0.72rem;
    font-weight: 600;
    font-family: var(--font-body);
    color: var(--color-text-light);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    margin-right: 0.5rem;
    transition: all 0.15s var(--ease);
    white-space: nowrap;
}

    .mde-btn-expand:hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
    }

/* ---- Panels (textarea / preview / html source) ---- */

.mde-body {
    position: relative;
}

.mde-panel {
    display: none;
}

    .mde-panel.active {
        display: block;
    }

    .mde-panel textarea {
        display: block;
        width: 100%;
        height: 420px;
        padding: 0.85rem 1rem;
        font-family: var(--font-mono);
        font-size: 0.85rem;
        line-height: 1.6;
        color: var(--color-text);
        background: var(--color-surface);
        border: none;
        outline: none;
        resize: vertical;
        tab-size: 4;
    }

.mde-preview {
    padding: 1rem;
    min-height: 420px;
    overflow-y: auto;
}

.mde-htmlsource {
    padding: 0.85rem 1rem;
    min-height: 420px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--color-text);
    white-space: pre-wrap;
    word-break: break-word;
}

.mde-placeholder {
    color: var(--color-text-light);
    font-size: 0.88rem;
    font-style: italic;
    padding: 2rem;
    text-align: center;
}

/* ---- Fullscreen mode ---- */

.mde-fullscreen {
    position: fixed !important;
    inset: 0 !important;
    z-index: 9999 !important;
    border-radius: 0 !important;
    border: none !important;
    margin: 0 !important;
}

    .mde-fullscreen .mde-panel textarea,
    .mde-fullscreen .mde-preview,
    .mde-fullscreen .mde-htmlsource {
        height: calc(100vh - 39px);
        min-height: unset;
    }

    .mde-fullscreen .mde-panel textarea {
        resize: none;
    }

/* hide page scroll when fullscreen */
body.mde-body-locked {
    overflow: hidden;
}

/* ---- Syntax help link ---- */

.mde-syntax-link {
    padding: 0.3rem 0.6rem;
    font-size: 0.78rem;
    border-top: 1px solid var(--color-border);
}

    .mde-syntax-link a {
        color: var(--color-text-light);
        text-decoration: none;
        transition: color 0.15s var(--ease);
    }

        .mde-syntax-link a:hover {
            color: var(--color-primary);
        }

/* ---- Loading spinner ---- */

.mde-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--color-text-light);
    font-size: 0.85rem;
    gap: 0.5rem;
}

.mde-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: mde-spin 0.6s linear infinite;
}

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