/* ============================================================
   鸣潮 · 面板/背景图编辑台 — telemetry console aesthetic
   Dark slate + cool blue accent, tight info density,
   tabular numbers, viewfinder brackets on preview.
   ============================================================ */

:root {
  /* palette */
  --bg-0: #07090d;
  --bg-1: #0b0f15;
  --bg-2: #11161e;
  --bg-3: #161c26;
  --bg-4: #1c2330;
  --line-1: #1d2533;
  --line-2: #28324a;
  --line-3: #3a465f;

  --fg-0: #eef1f6;
  --fg-1: #c7cdd9;
  --fg-2: #8b95a7;
  --fg-3: #5e6878;
  --fg-4: #404a5d;

  --accent: #5a8cff;
  --accent-hi: #7aa3ff;
  --accent-soft: rgba(90, 140, 255, 0.18);
  --accent-glow: rgba(90, 140, 255, 0.32);

  --type-card: #4dd0e1;       /* 面板图 — cyan */
  --type-bg: #a78bfa;          /* MR 背景图 — violet */
  --type-stamina: #fbbf24;     /* MR 立绘 — amber */

  --ok: #4ade80;
  --warn: #facc15;
  --err: #f87171;

  /* type */
  --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  /* metrics — 左右栏宽度由 JS 写到 :root 上, 这里给默认值 */
  --topbar-h: 52px;
  --side-w: 296px;
  --preview-w: 440px;
  --resizer-w: 6px;
  --r-1: 4px;
  --r-2: 6px;
  --r-3: 10px;

  --t-fast: 90ms cubic-bezier(0.4, 0, 0.2, 1);
  --t-base: 140ms cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.45;
  color: var(--fg-1);
  background:
    radial-gradient(1200px 700px at 80% -20%, rgba(90, 140, 255, 0.06), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(90, 140, 255, 0.04), transparent 60%),
    var(--bg-0);
  font-feature-settings: "ss01", "cv11", "tnum";
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
  overflow: hidden;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}
button:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 1px;
}

input[type="text"],
input[type="search"] {
  font: inherit;
  color: var(--fg-0);
  background: transparent;
  border: 0;
}

::selection {
  background: var(--accent-soft);
  color: var(--fg-0);
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: var(--bg-4);
  border: 2px solid var(--bg-0);
  border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover { background: var(--line-3); }
::-webkit-scrollbar-track { background: transparent; }

/* ============================================================
   APP SHELL — grid layout
   ============================================================ */

#app {
  display: grid;
  grid-template-columns:
    var(--side-w)
    var(--resizer-w)
    minmax(0, 1fr)
    var(--resizer-w)
    var(--preview-w);
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas:
    "topbar topbar topbar topbar topbar"
    "sidebar resizerSide center resizerPreview preview";
  height: 100vh;
}

.resizer {
  position: relative;
  background: var(--bg-1);
  cursor: col-resize;
  transition: background var(--t-fast);
  border-left: 1px solid var(--line-1);
  border-right: 1px solid var(--line-1);
}
.resizer::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 32px;
  border-radius: 2px;
  background: var(--line-2);
  transition: background var(--t-fast);
}
.resizer:hover, .resizer.is-active {
  background: var(--bg-2);
}
.resizer:hover::after, .resizer.is-active::after {
  background: var(--accent);
}
.resizer:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: -1px;
}
.resizer--side { grid-area: resizerSide; }
.resizer--preview { grid-area: resizerPreview; }

/* ============================================================
   TOPBAR
   ============================================================ */

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  border-bottom: 1px solid var(--line-1);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.015), transparent 70%),
    var(--bg-1);
  position: relative;
}
.topbar::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-soft), transparent);
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.topbar__mark {
  width: 22px; height: 22px;
  border-radius: 5px;
  background:
    conic-gradient(from 210deg, var(--accent) 0%, var(--type-card) 35%, var(--type-bg) 70%, var(--accent) 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 0 14px var(--accent-glow);
}
.topbar__titles { display: flex; flex-direction: column; gap: 2px; }
.topbar__title {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fg-0);
}
.topbar__title .topbar__sep { color: var(--fg-3); margin: 0 6px; font-weight: 300; }
.topbar__subtitle {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.04em;
}
.topbar__subtitle .dot { color: var(--fg-4); margin: 0 4px; }

.topbar__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.topbar__login {
  margin-left: 6px;
  padding: 4px 10px;
  font-size: 11px;
  letter-spacing: 0.06em;
}
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot--ok {
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.15);
}
.status-dot--warn { background: var(--warn); }
.status-dot--err { background: var(--err); }

/* ============================================================
   SIDEBAR
   ============================================================ */

.sidebar {
  grid-area: sidebar;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line-1);
  background: var(--bg-1);
  min-height: 0;
}

.sidebar__tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2px;
  margin: 14px 14px 10px 14px;
  padding: 3px;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
}
.tab {
  position: relative;
  padding: 7px 0;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-2);
  border-radius: var(--r-1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: color var(--t-fast), background var(--t-fast);
}
.tab:hover { color: var(--fg-1); }
.tab.is-active {
  color: var(--fg-0);
  background: var(--bg-3);
  box-shadow: inset 0 0 0 1px var(--line-2);
}
.tab__swatch {
  width: 8px; height: 8px;
  border-radius: 2px;
  display: inline-block;
}

.sidebar__filter {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 14px 10px 14px;
  padding: 8px 10px;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  transition: border-color var(--t-fast);
}
.sidebar__filter:focus-within { border-color: var(--line-3); }
.sidebar__filter-icon { color: var(--fg-3); font-size: 14px; }
.sidebar__filter input {
  flex: 1;
  outline: none;
  font-size: 12px;
}
.sidebar__filter input::placeholder { color: var(--fg-3); }

.sidebar__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 18px 6px 18px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.12em;
  border-top: 1px solid var(--line-1);
}
.sidebar__head-count {
  color: var(--fg-2);
  font-variant-numeric: tabular-nums;
}

.sidebar__list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 6px 14px 6px;
  outline: none;
}

.folder {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--r-2);
  cursor: pointer;
  transition: background var(--t-fast);
  border: 1px solid transparent;
}
.folder:hover { background: var(--bg-2); }
.folder.is-active {
  background: var(--bg-3);
  border-color: var(--line-2);
}
.folder.is-active .folder__name { color: var(--fg-0); }
.folder.is-active::before {
  content: "";
  position: absolute;
}
.folder__id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}
.folder.is-active .folder__id { color: var(--accent); }
.folder__name {
  font-size: 13px;
  color: var(--fg-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.folder__count {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  font-variant-numeric: tabular-nums;
  min-width: 22px;
  text-align: right;
  padding: 2px 6px;
  background: var(--bg-2);
  border-radius: 999px;
  border: 1px solid var(--line-1);
}
.folder.is-active .folder__count {
  color: var(--accent);
  border-color: var(--line-2);
  background: var(--accent-soft);
}

.sidebar__empty {
  padding: 24px;
  font-size: 12px;
  color: var(--fg-3);
  text-align: center;
}

/* ============================================================
   CENTER PANE
   ============================================================ */

.center {
  grid-area: center;
  display: flex;
  flex-direction: column;
  min-width: 0;
  /* grid item 默认 min-height:auto, 子级 overflow:auto 会失效 */
  min-height: 0;
  background: var(--bg-0);
  position: relative;
}
.center::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 18px 18px;
  pointer-events: none;
  opacity: 0.6;
}

.center__head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--line-1);
  background: linear-gradient(180deg, var(--bg-1), transparent);
}
.center__title {
  display: flex;
  align-items: center;
  gap: 10px;
}
.center__title .crumb {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-3);
  letter-spacing: 0.04em;
}
.center__title .crumb b { color: var(--fg-1); font-weight: 500; }
.center__title h2 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-0);
  letter-spacing: 0.01em;
}
.type-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--line-2);
  color: var(--fg-1);
  background: var(--bg-2);
}
.type-pill .swatch {
  width: 6px; height: 6px;
  border-radius: 50%;
}

.center__actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.center__body {
  position: relative;
  z-index: 1;
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px 32px 22px;
  min-height: 0;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 7px 14px;
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--r-2);
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  color: var(--fg-1);
  transition: background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.btn:hover {
  background: var(--bg-3);
  color: var(--fg-0);
  border-color: var(--line-3);
}
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0e14;
  font-weight: 600;
}
.btn--primary:hover {
  background: var(--accent-hi);
  border-color: var(--accent-hi);
  color: #0a0e14;
}
.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--fg-2);
}
.btn--ghost:hover {
  background: var(--bg-2);
  color: var(--fg-0);
}
.btn--danger {
  color: var(--err);
  border-color: rgba(248, 113, 113, 0.3);
}
.btn--danger:hover {
  background: rgba(248, 113, 113, 0.08);
  border-color: var(--err);
  color: var(--err);
}
.btn .kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
}

/* ============================================================
   THUMBNAIL GRID
   ============================================================ */

:root { --tile-min: 148px; }

.grid {
  display: grid;
  /* min 列宽由 --tile-min 控制, 用户拖动滑块可覆盖 */
  grid-template-columns: repeat(auto-fill, minmax(var(--tile-min), 1fr));
  gap: 12px;
}

.tile {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: var(--r-2);
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--t-fast), border-color var(--t-fast);
}
.tile.is-landscape { aspect-ratio: 16 / 9; }
.tile:hover {
  transform: translateY(-1px);
  border-color: var(--line-3);
}
.tile.is-selected {
  border-color: var(--accent);
  box-shadow:
    0 0 0 1px var(--accent),
    0 0 24px -6px var(--accent-glow);
}
.tile img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity 200ms ease;
}
.tile.is-loaded img { opacity: 1; }
.tile__skeleton {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(110deg, var(--bg-2) 30%, var(--bg-3) 50%, var(--bg-2) 70%);
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
}
.tile.is-loaded .tile__skeleton { display: none; }
@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}
.tile.is-error .tile__skeleton {
  animation: none;
  background: var(--bg-2);
}
.tile.is-error::before {
  content: "加载失败 · 点击重试";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--err);
  letter-spacing: 0.06em;
  text-align: center;
  padding: 0 12px;
  z-index: 1;
}
.tile__hash {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 8px 10px 7px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-1);
  letter-spacing: 0.04em;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.7));
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}
.tile__hash .meta { color: var(--fg-3); }
.tile__menu {
  position: absolute;
  top: 6px; right: 6px;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--t-fast);
}
.tile:hover .tile__menu, .tile.is-selected .tile__menu { opacity: 1; }
.tile-act {
  width: 26px; height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(11, 15, 21, 0.78);
  border: 1px solid var(--line-2);
  border-radius: 4px;
  color: var(--fg-1);
  font-size: 13px;
  text-decoration: none;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
}
.tile-act:hover { background: var(--bg-3); color: var(--fg-0); }
.tile-act--link:hover { color: var(--accent); border-color: var(--accent); }
.tile-act--danger:hover { color: var(--err); border-color: var(--err); }

.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--fg-3);
}
.empty .empty__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fg-2);
  margin-bottom: 4px;
}

/* ============================================================
   UPLOAD / DROP ZONE
   ============================================================ */

.dropzone {
  border: 1px dashed var(--line-2);
  border-radius: var(--r-3);
  padding: 28px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-1), var(--bg-0));
  transition: border-color var(--t-base), background var(--t-base);
  margin-bottom: 18px;
}
.dropzone.is-hot {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fg-2);
  margin-bottom: 6px;
}
.dropzone__sub {
  font-size: 12px;
  color: var(--fg-3);
  margin-bottom: 14px;
}
.dropzone__row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   CROPPER
   ============================================================ */

.cropper {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.cropper__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-1);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
}
.cropper__readout {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.cropper__readout .k { color: var(--fg-3); margin-right: 4px; }
.cropper__readout b { color: var(--fg-0); font-weight: 500; }
.cropper__actions { display: flex; gap: 8px; }

.cropper__stage {
  position: relative;
  background:
    linear-gradient(45deg, #0c1018 25%, transparent 25%) 0 0,
    linear-gradient(-45deg, #0c1018 25%, transparent 25%) 0 0,
    linear-gradient(45deg, transparent 75%, #0c1018 75%) 8px 8px,
    linear-gradient(-45deg, transparent 75%, #0c1018 75%) 8px 8px,
    var(--bg-1);
  background-size: 16px 16px;
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  /* 锚到左上角: 增量裁剪后 current 尺寸会变, 用 flex 居中会让 wrap 在 stage 内
     重新定位, 视觉上图片整块平移。统一靠左上角对齐, 内容只会"变小"不会"漂移"。 */
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 14px;
  min-height: 380px;
  overflow: auto;
}
.cropper__canvas-wrap {
  position: relative;
  display: inline-block;
  user-select: none;
  /* 阻止浏览器把触摸手势当作滚动/缩放抢走 */
  touch-action: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}
.cropper__img {
  display: block;
  max-width: 100%;
  max-height: 70vh;
  pointer-events: none;
  user-select: none;
}
.cropper__rect {
  position: absolute;
  border: 1px solid var(--accent);
  box-shadow: 0 0 0 99999px rgba(7, 9, 13, 0.6);
  cursor: move;
  touch-action: none;
}
.cropper__rect::before, .cropper__rect::after {
  content: "";
  position: absolute;
  background: rgba(255, 255, 255, 0.18);
}
.cropper__rect::before {
  left: 33.33%; right: 33.33%;
  top: 0; bottom: 0;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
}
.cropper__rect::after {
  top: 33.33%; bottom: 33.33%;
  left: 0; right: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
}
.handle {
  position: absolute;
  width: 12px; height: 12px;
  background: var(--accent);
  border: 1px solid #0a0e14;
  border-radius: 2px;
  touch-action: none;
}
/* 透明的扩展点击/触摸热区, 不影响视觉, 增大命中范围 */
.handle::before {
  content: "";
  position: absolute;
  inset: -10px;
}
.handle.h-n  { top: -6px; left: 50%; transform: translateX(-50%); cursor: ns-resize; }
.handle.h-s  { bottom: -6px; left: 50%; transform: translateX(-50%); cursor: ns-resize; }
.handle.h-w  { left: -6px; top: 50%; transform: translateY(-50%); cursor: ew-resize; }
.handle.h-e  { right: -6px; top: 50%; transform: translateY(-50%); cursor: ew-resize; }
.handle.h-nw { top: -6px; left: -6px; cursor: nwse-resize; }
.handle.h-ne { top: -6px; right: -6px; cursor: nesw-resize; }
.handle.h-sw { bottom: -6px; left: -6px; cursor: nesw-resize; }
.handle.h-se { bottom: -6px; right: -6px; cursor: nwse-resize; }

/* 触摸设备: 视觉手柄变大, 热区再放大一圈, 拖动友好 */
@media (pointer: coarse) {
  .handle {
    width: 22px;
    height: 22px;
    border-radius: 4px;
  }
  .handle::before {
    inset: -14px;
  }
  .handle.h-n  { top: -11px; }
  .handle.h-s  { bottom: -11px; }
  .handle.h-w  { left: -11px; }
  .handle.h-e  { right: -11px; }
  .handle.h-nw { top: -11px; left: -11px; }
  .handle.h-ne { top: -11px; right: -11px; }
  .handle.h-sw { bottom: -11px; left: -11px; }
  .handle.h-se { bottom: -11px; right: -11px; }
  /* 三分线在大屏边距下变细更顺眼 */
  .cropper__rect::before, .cropper__rect::after {
    background: rgba(255, 255, 255, 0.12);
  }
}

/* ============================================================
   BATCH STAGING
   ============================================================ */

.batch-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(250, 204, 21, 0.06);
  border: 1px solid rgba(250, 204, 21, 0.28);
  border-radius: var(--r-2);
  margin-bottom: 14px;
}
.batch-bar__msg {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--fg-1);
  font-size: 12px;
}
.batch-bar__msg .icon {
  width: 18px; height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(250, 204, 21, 0.16);
  color: var(--warn);
  border-radius: 4px;
  font-weight: 600;
  font-family: var(--font-mono);
  font-size: 11px;
}
.batch-bar__check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--fg-2);
  cursor: pointer;
}
.batch-bar__check input { accent-color: var(--accent); }
.batch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--tile-min), 1fr));
  gap: 10px;
}
.staging-card {
  background: var(--bg-1);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.staging-card.is-active { border-color: var(--accent); }
.staging-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}
.staging-card__meta {
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line-1);
}
.staging-card__row {
  display: flex;
  border-top: 1px solid var(--line-1);
}
.staging-card__row .btn {
  flex: 1;
  border: 0;
  border-radius: 0;
  background: transparent;
  padding: 8px 0;
  font-size: 11px;
}
.staging-card__row .btn + .btn { border-left: 1px solid var(--line-1); }

/* ============================================================
   WARNING BANNER
   ============================================================ */

.warn-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: rgba(248, 113, 113, 0.06);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: var(--r-2);
  margin-bottom: 14px;
}
.warn-banner__icon {
  width: 22px; height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(248, 113, 113, 0.18);
  color: var(--err);
  border-radius: 4px;
  font-weight: 600;
}
.warn-banner__msg {
  flex: 1;
  font-size: 12px;
  color: var(--fg-1);
}
.warn-banner button { color: var(--fg-2); }

/* ============================================================
   PREVIEW PANE
   ============================================================ */

.preview {
  grid-area: preview;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line-1);
  background: var(--bg-1);
  min-height: 0;
}
.preview__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 18px 12px 18px;
  border-bottom: 1px solid var(--line-1);
}
.preview__titles h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--fg-0);
  letter-spacing: 0.02em;
}
.preview__sub {
  margin: 2px 0 0 0;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
}
.preview__controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* renderer toggle (HTML / PIL) */
.seg {
  display: inline-flex;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  padding: 2px;
}
.seg button {
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--fg-2);
  border-radius: 3px;
  text-transform: uppercase;
}
.seg button.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.preview__viewport {
  position: relative;
  flex: 1;
  margin: 16px;
  border-radius: var(--r-2);
  background:
    linear-gradient(45deg, #0c1018 25%, transparent 25%) 0 0,
    linear-gradient(-45deg, #0c1018 25%, transparent 25%) 0 0,
    linear-gradient(45deg, transparent 75%, #0c1018 75%) 9px 9px,
    linear-gradient(-45deg, transparent 75%, #0c1018 75%) 9px 9px,
    var(--bg-0);
  background-size: 18px 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 0;
}
.preview__viewport img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: none;
}
.preview__viewport.has-image img { display: block; }
.preview__viewport.has-image .preview__placeholder { display: none; }

.preview__placeholder {
  text-align: center;
  padding: 24px;
}
.preview__placeholder-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--fg-2);
  margin: 0 0 6px 0;
}
.preview__placeholder-sub {
  font-size: 12px;
  color: var(--fg-3);
  margin: 0;
}

/* viewfinder corner brackets */
.viewfinder { position: absolute; inset: 8px; pointer-events: none; }
.viewfinder__c {
  position: absolute;
  width: 14px; height: 14px;
  border-color: var(--line-3);
  border-style: solid;
  border-width: 0;
}
.viewfinder__c--tl { top: 0; left: 0; border-top-width: 1px; border-left-width: 1px; }
.viewfinder__c--tr { top: 0; right: 0; border-top-width: 1px; border-right-width: 1px; }
.viewfinder__c--bl { bottom: 0; left: 0; border-bottom-width: 1px; border-left-width: 1px; }
.viewfinder__c--br { bottom: 0; right: 0; border-bottom-width: 1px; border-right-width: 1px; }

/* spinner overlay */
.preview__overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  background: rgba(7, 9, 13, 0.6);
  backdrop-filter: blur(2px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fg-1);
}
.preview__overlay.is-on { display: flex; }
.spinner {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 2px solid var(--line-2);
  border-top-color: var(--accent);
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.preview__foot {
  padding: 12px 18px 16px 18px;
  border-top: 1px solid var(--line-1);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-3);
  letter-spacing: 0.06em;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 36px;
}
.preview__foot b { color: var(--fg-1); font-weight: 500; }

/* ============================================================
   TOASTS
   ============================================================ */

.toast-stack {
  position: fixed;
  top: 64px;
  right: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
  width: 320px;
  max-width: calc(100vw - 36px);
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-left-width: 3px;
  border-radius: var(--r-2);
  padding: 10px 12px;
  font-size: 12px;
  color: var(--fg-1);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: toast-in 160ms ease-out;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.4);
}
.toast.is-err { border-left-color: var(--err); }
.toast.is-warn { border-left-color: var(--warn); }
.toast.is-ok { border-left-color: var(--ok); }
.toast.is-info { border-left-color: var(--accent); }
.toast__msg { flex: 1; }
.toast__close {
  color: var(--fg-3);
  padding: 0 2px;
}
.toast__close:hover { color: var(--fg-0); }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(8px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============================================================
   small utilities
   ============================================================ */
.k-mono { font-family: var(--font-mono); }
.muted { color: var(--fg-3); }
.row { display: flex; align-items: center; gap: 8px; }
.spacer { flex: 1; }


/* ============================================================
   THUMBNAIL SIZE SLIDER
   ============================================================ */
.thumb-sizer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  height: 30px;
  user-select: none;
}
.thumb-sizer__ico {
  font-size: 11px;
  color: var(--fg-3);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}
.thumb-sizer__val {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-2);
  min-width: 28px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.thumb-sizer input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 110px;
  height: 14px;
  background: transparent;
  cursor: pointer;
}
.thumb-sizer input[type="range"]:focus { outline: none; }
.thumb-sizer input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--line-2);
  border-radius: 2px;
}
.thumb-sizer input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: -5px;
  cursor: grab;
  box-shadow: 0 0 0 4px transparent;
  transition: box-shadow var(--t-fast);
}
.thumb-sizer input[type="range"]:hover::-webkit-slider-thumb,
.thumb-sizer input[type="range"]:active::-webkit-slider-thumb {
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.thumb-sizer input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--line-2);
  border-radius: 2px;
}
.thumb-sizer input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 0;
  border-radius: 50%;
  background: var(--accent);
  cursor: grab;
}


/* ============================================================
   MOBILE TRIGGERS + SCRIM (only shown on narrow viewports)
   ============================================================ */
.mobile-trigger {
  display: none;
  position: fixed;
  z-index: 50;
  bottom: 16px;
  width: 44px; height: 44px;
  border-radius: 22px;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  color: var(--fg-0);
  font-size: 20px;
  line-height: 1;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.5);
}
.mobile-trigger--menu { left: 16px; }
.mobile-trigger--preview { right: 16px; }
.mobile-trigger:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 2px;
}

.scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(7, 9, 13, 0.6);
  backdrop-filter: blur(2px);
  animation: scrim-in 140ms ease-out;
}
.scrim.is-on { display: block; }
@keyframes scrim-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ============================================================
   RESPONSIVE — tablet
   ============================================================ */
@media (max-width: 1100px) {
  :root { --side-w: 240px; --preview-w: 360px; }
}

/* ============================================================
   RESPONSIVE — phone (< 820px): collapse to single column,
   sidebar/preview become drawers, center fills the screen.
   ============================================================ */
@media (max-width: 820px) {
  #app {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: var(--topbar-h) 1fr;
    grid-template-areas:
      "topbar"
      "center";
  }

  .topbar { padding: 0 14px; }
  .topbar__subtitle { display: none; }
  .topbar__title { font-size: 13px; }
  .topbar__meta .topbar__status { display: none; }

  .resizer { display: none; }
  .mobile-trigger { display: inline-flex; }

  .sidebar, .preview {
    position: fixed;
    top: var(--topbar-h);
    bottom: 0;
    z-index: 45;
    width: min(86vw, 360px);
    transform: translateX(-105%);
    transition: transform 180ms cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.6);
  }
  .sidebar { left: 0; }
  .preview {
    right: 0;
    left: auto;
    width: min(94vw, 460px);
    transform: translateX(105%);
    border-left: 1px solid var(--line-1);
    border-right: 0;
  }
  .sidebar.is-open, .preview.is-open { transform: translateX(0); }

  .center__head {
    padding: 12px 14px;
    gap: 8px;
  }
  .center__title h2 { font-size: 13px; }
  .center__body { padding: 12px 14px 80px 14px; }

  :root { --tile-min: 116px; }
  .grid { gap: 8px; }
  .batch-grid { gap: 8px; }

  .cropper__bar { padding: 10px; }
  .cropper__readout { font-size: 10px; gap: 12px; }
  .cropper__stage { min-height: 280px; }

  /* tighten preview on small screens */
  .preview__head { padding: 12px 14px 10px; }
  .preview__viewport { margin: 12px; }
  .preview__foot { padding: 10px 14px 14px; }

  .toast-stack {
    top: auto;
    bottom: 76px;
    right: 12px;
    left: 12px;
    width: auto;
  }
}

/* very narrow phones */
@media (max-width: 420px) {
  :root { --tile-min: 96px; }
  .topbar__mark { display: none; }
  .grid { gap: 6px; }
  .batch-grid { gap: 6px; }
}