/* ============================================================
   image-grid-split / style.css
   V3.9 5.1 colors/radii follow site vars; 5.2 dark auto; 5.3 fluid container
   ============================================================ */
.image-grid-split-container {
    --image-grid-split-accent: var(--primary, #2563eb);
    --image-grid-split-accent-hover: var(--primary-hover, #1d4ed8);
    --image-grid-split-surface: var(--bg-input, #fff);
    --image-grid-split-panel: var(--bg-card, var(--bg-input, #fff));
    --image-grid-split-soft: var(--bg-btn, #f3f4f6);
    --image-grid-split-soft-hover: var(--bg-btn-hover, #e5e7eb);
    --image-grid-split-line: var(--border, #e5e7eb);
    --image-grid-split-txt: var(--text, #333);
    --image-grid-split-txt2: var(--text-secondary, #6b7280);
    --image-grid-split-ok: var(--success, #16a34a);
    --image-grid-split-err: var(--danger, #dc2626);
    --image-grid-split-r: var(--radius, 10px);
    --image-grid-split-rs: var(--radius-sm, 6px);
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: auto;
    color: var(--image-grid-split-txt);
    font-size: 14px;
    line-height: 1.6;
}
.image-grid-split-container *,
.image-grid-split-container *::before,
.image-grid-split-container *::after { box-sizing: border-box; }
.image-grid-split-container [hidden] { display: none !important; }

.image-grid-split-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 16px; align-items: start; }
.image-grid-split-main { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.image-grid-split-side { display: flex; flex-direction: column; gap: 14px; min-width: 0; }

.image-grid-split-panel {
    background: var(--image-grid-split-panel);
    border: 1px solid var(--image-grid-split-line);
    border-radius: var(--image-grid-split-r);
    padding: 14px;
    min-width: 0;
}
.image-grid-split-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; margin-bottom: 10px; }
.image-grid-split-headt { font-size: 15px; font-weight: 600; color: var(--image-grid-split-txt); }
.image-grid-split-heads { font-size: 12px; color: var(--image-grid-split-txt2); }
.image-grid-split-ghead {
    font-size: 13px; font-weight: 600; color: var(--image-grid-split-txt);
    padding: 6px 10px; margin-bottom: 10px;
    background: var(--image-grid-split-soft); border-radius: var(--image-grid-split-rs);
    border-left: 3px solid var(--image-grid-split-accent);
}

.image-grid-split-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 10px; }
.image-grid-split-row:last-child { margin-bottom: 0; }
.image-grid-split-col { display: flex; flex-direction: column; gap: 6px; min-width: 0; flex: 1 1 140px; }
.image-grid-split-lbl { font-size: 13px; color: var(--image-grid-split-txt); white-space: nowrap; }
.image-grid-split-lbl-min { font-size: 12px; color: var(--image-grid-split-txt2); }

.image-grid-split-input, .image-grid-split-select, .image-grid-split-textarea {
    width: 100%; min-width: 0; padding: 8px 10px; font: inherit; font-size: 13px;
    color: var(--image-grid-split-txt); background: var(--image-grid-split-surface);
    border: 1px solid var(--image-grid-split-line); border-radius: var(--image-grid-split-rs);
    outline: none; transition: border-color .15s;
}
.image-grid-split-input:focus, .image-grid-split-select:focus, .image-grid-split-textarea:focus { border-color: var(--image-grid-split-accent); }
.image-grid-split-textarea { resize: vertical; min-height: 96px; line-height: 1.55; }
.image-grid-split-input[type=color] { padding: 2px; height: 36px; cursor: pointer; }
.image-grid-split-input[type=file] { padding: 6px; font-size: 12px; }
.image-grid-split-input[type=checkbox], .image-grid-split-check { width: 16px; height: 16px; accent-color: var(--image-grid-split-accent); cursor: pointer; }

.image-grid-split-btn {
    padding: 8px 14px; font: inherit; font-size: 13px; cursor: pointer;
    color: var(--image-grid-split-txt); background: var(--image-grid-split-soft);
    border: 1px solid var(--image-grid-split-line); border-radius: var(--image-grid-split-rs);
    transition: background .15s, border-color .15s;
}
.image-grid-split-btn:hover { background: var(--image-grid-split-soft-hover); }
.image-grid-split-btn:focus-visible { outline: 2px solid var(--image-grid-split-accent); outline-offset: 1px; }
.image-grid-split-btn-primary {
    color: #fff; background: var(--image-grid-split-accent); border-color: var(--image-grid-split-accent);
}
.image-grid-split-btn-primary:hover { background: var(--image-grid-split-accent-hover); border-color: var(--image-grid-split-accent-hover); }
.image-grid-split-btn:disabled { opacity: .55; cursor: not-allowed; }
.image-grid-split-btns { display: flex; flex-wrap: wrap; gap: 8px; }

/* range: filled part solid theme color, remainder light gray */
.image-grid-split-range {
    --image-grid-split-fill: 0%;
    -webkit-appearance: none; appearance: none;
    width: 100%; height: 18px; background: transparent; cursor: pointer; margin: 0;
}
.image-grid-split-range::-webkit-slider-runnable-track {
    height: 6px; border-radius: var(--image-grid-split-rs);
    background: linear-gradient(to right,
        var(--image-grid-split-accent) 0%, var(--image-grid-split-accent) var(--image-grid-split-fill),
        var(--image-grid-split-line) var(--image-grid-split-fill), var(--image-grid-split-line) 100%);
}
.image-grid-split-range::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 16px; height: 16px; margin-top: -5px; border-radius: 50%;
    background: var(--image-grid-split-accent); border: 2px solid var(--image-grid-split-panel);
    box-shadow: 0 0 0 1px var(--image-grid-split-line);
}
.image-grid-split-range::-moz-range-track { height: 6px; border-radius: var(--image-grid-split-rs); background: var(--image-grid-split-line); }
.image-grid-split-range::-moz-range-progress { height: 6px; border-radius: var(--image-grid-split-rs); background: var(--image-grid-split-accent); }
.image-grid-split-range::-moz-range-thumb {
    width: 14px; height: 14px; border-radius: 50%;
    background: var(--image-grid-split-accent); border: 2px solid var(--image-grid-split-panel);
}

/* light scrollbar */
.image-grid-split-scroll::-webkit-scrollbar { width: 10px; height: 10px; }
.image-grid-split-scroll::-webkit-scrollbar-track { background: var(--image-grid-split-soft); border-radius: var(--image-grid-split-rs); }
.image-grid-split-scroll::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--image-grid-split-txt2) 45%, var(--image-grid-split-panel));
    border-radius: var(--image-grid-split-rs); border: 2px solid var(--image-grid-split-panel);
}
.image-grid-split-scroll::-webkit-scrollbar-thumb:hover { background: var(--image-grid-split-accent); }
.image-grid-split-scroll { scrollbar-width: thin; scrollbar-color: color-mix(in srgb, var(--image-grid-split-txt2) 45%, var(--image-grid-split-panel)) var(--image-grid-split-soft); }

.image-grid-split-stage {
    background: var(--image-grid-split-soft); border: 1px dashed var(--image-grid-split-line);
    border-radius: var(--image-grid-split-rs); padding: 12px;
    display: flex; align-items: center; justify-content: center;
    min-height: 180px; overflow: auto; max-width: 100%;
}
.image-grid-split-stage canvas, .image-grid-split-stage img { max-width: 100%; height: auto; display: block; }
.image-grid-split-empty { color: var(--image-grid-split-txt2); font-size: 13px; text-align: center; padding: 24px 8px; }

.image-grid-split-msg { margin: 8px 0 0; font-size: 13px; color: var(--image-grid-split-txt2); min-height: 20px; }
.image-grid-split-msg-ok { color: var(--image-grid-split-ok); }
.image-grid-split-msg-err { color: var(--image-grid-split-err); }
.image-grid-split-meta { margin: 6px 0 0; font-size: 12px; color: var(--image-grid-split-txt2); word-break: break-all; }

.image-grid-split-drop {
    border: 2px dashed var(--image-grid-split-line); border-radius: var(--image-grid-split-r);
    padding: 20px 12px; text-align: center; cursor: pointer;
    color: var(--image-grid-split-txt2); font-size: 13px; background: var(--image-grid-split-soft);
    transition: border-color .15s, background .15s;
    margin-bottom: 22px;
}
.image-grid-split-drop:hover, .image-grid-split-drop-over { border-color: var(--image-grid-split-accent); background: var(--image-grid-split-soft-hover); }

.image-grid-split-list { max-height: 260px; overflow: auto; border: 1px solid var(--image-grid-split-line); border-radius: var(--image-grid-split-rs); }
.image-grid-split-item {
    display: flex; align-items: center; gap: 8px; padding: 7px 10px;
    border-bottom: 1px solid var(--image-grid-split-line); font-size: 13px; min-width: 0;
}
.image-grid-split-item:last-child { border-bottom: 0; }
.image-grid-split-item-name { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.image-grid-split-item-size { flex: 0 0 auto; color: var(--image-grid-split-txt2); font-size: 12px; }
.image-grid-split-item-x { flex: 0 0 auto; border: 0; background: none; color: var(--image-grid-split-err); cursor: pointer; font-size: 15px; line-height: 1; padding: 2px 4px; border-radius: var(--image-grid-split-rs); }
.image-grid-split-item-x:hover { background: var(--image-grid-split-soft-hover); }

.image-grid-split-grid { display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
.image-grid-split-cell {
    border: 1px solid var(--image-grid-split-line); border-radius: var(--image-grid-split-rs);
    padding: 8px; text-align: center; background: var(--image-grid-split-surface); min-width: 0;
}
.image-grid-split-cell canvas, .image-grid-split-cell img { max-width: 100%; height: auto; display: block; margin: 0 auto 6px; }
.image-grid-split-cell-name { font-size: 12px; color: var(--image-grid-split-txt2); word-break: break-all; }
.image-grid-split-cell-btn { font-size: 12px; padding: 4px 8px; }

.image-grid-split-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.image-grid-split-table th, .image-grid-split-table td { border: 1px solid var(--image-grid-split-line); padding: 5px 7px; text-align: left; word-break: break-all; }
.image-grid-split-table th { background: var(--image-grid-split-soft); font-weight: 600; }

.image-grid-split-seg { display: flex; flex-wrap: wrap; gap: 6px; }
.image-grid-split-seg button {
    padding: 6px 12px; font: inherit; font-size: 13px; cursor: pointer;
    color: var(--image-grid-split-txt); background: var(--image-grid-split-soft);
    border: 1px solid var(--image-grid-split-line); border-radius: var(--image-grid-split-rs);
}
.image-grid-split-seg button[aria-pressed=true] {
    color: #fff; background: var(--image-grid-split-accent); border-color: var(--image-grid-split-accent);
}
.image-grid-split-hint { font-size: 12px; color: var(--image-grid-split-txt2); margin: 6px 0 0; }
.image-grid-split-kv { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 12px; color: var(--image-grid-split-txt2); }

@media (max-width: 900px) {
    .image-grid-split-layout { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 480px) {
    .image-grid-split-container { font-size: 13px; }
    .image-grid-split-panel { padding: 10px; }
    .image-grid-split-col { flex-basis: 100%; }
}