/* ── Layout ── */
.two-col {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.25rem;
    align-items: start;
}

@media (max-width: 860px) {
    .two-col {
        grid-template-columns: 1fr;
    }
}

.preview-card {
    min-width: 0;
    overflow: hidden;
}

/* ── Source mode tabs ── */
.src-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0;
}

.src-tab {
    padding: .45rem .9rem;
    font-size: .8rem;
    font-weight: 600;
    color: var(--text3);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: color var(--transition), border-color var(--transition);
    user-select: none;
}

.src-tab:hover {
    color: var(--text);
}

.src-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ── Code textarea ── */
.code-area {
    width: 100%;
    box-sizing: border-box;
    font-family: 'JetBrains Mono', 'Fira Mono', 'Cascadia Code', monospace;
    font-size: .8rem;
    line-height: 1.6;
    padding: .75rem;
    background: var(--bg3);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    color: var(--text);
    resize: vertical;
    min-height: 160px;
    outline: none;
    transition: border-color var(--transition);
}

.code-area:focus {
    border-color: var(--accent);
}

/* ── Preview iframe ── */
.preview-wrap {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    min-height: 400px;
}

.preview-wrap iframe {
    width: 100%;
    height: 100%;
    min-height: 400px;
    border: none;
    display: block;
    background: #fff;
}

.preview-empty {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    color: var(--text3);
    font-size: .9rem;
    pointer-events: none;
}

.preview-empty .icon {
    font-size: 2.5rem;
}

/* ── Preview toolbar ── */
.preview-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .5rem .75rem;
    background: var(--surface2);
    border-bottom: 1px solid var(--border);
    gap: .5rem;
}

.preview-bar-title {
    font-size: .8rem;
    font-weight: 700;
    color: var(--text2);
}

.preview-size-btns {
    display: flex;
    gap: .3rem;
}

.preview-size-btn {
    width: 26px;
    height: 26px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface2);
    color: var(--text3);
    font-size: .75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.preview-size-btn:hover,
.preview-size-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ── Source mode selector ── */
.mode-row {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.mode-btn {
    flex: 1;
    padding: .55rem .5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface2);
    color: var(--text2);
    font-size: .8rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all var(--transition);
}

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

.file-pill {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: .4rem .7rem;
    font-size: .78rem;
    color: var(--text2);
    margin-bottom: .75rem;
    word-break: break-all;
}

.divider {
    height: 1px;
    background: var(--border);
    margin: 1rem 0;
}

/* URL input row */
.url-row {
    display: flex;
    gap: .5rem;
}

.url-row .form-control {
    flex: 1;
    min-width: 0;
}

.url-go-btn {
    flex-shrink: 0;
    padding: 0 .85rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition);
}

.url-go-btn:hover {
    opacity: .85;
}

/* Refresh badge */
.refresh-hint {
    font-size: .72rem;
    color: var(--text3);
    margin-top: .3rem;
    display: flex;
    align-items: center;
    gap: .3rem;
}