/* 图片隐藏数据分析 / 写入LSB 共用样式 */
* {
  box-sizing: border-box;
}

:root {
  --bg: #ffffff;
  --page-bg: #fbfbfc;
  --text: #14161a;
  --muted: #6b7280;
  --line: #e5e7eb;
  --line-soft: #f1f2f4;
  --accent: #2563eb;
  --accent-soft: #eff5ff;
  --danger: #dc2626;
  --ok: #16a34a;
  --warn: #d97706;
  --radius: 12px;
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

a {
  color: var(--accent);
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 24px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 15px;
}

.top-links {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

.top-links a {
  text-decoration: none;
}

.top-links a:hover {
  text-decoration: underline;
}

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px 64px;
}

.crumb {
  font-size: 13px;
  color: var(--muted);
}

.crumb a {
  text-decoration: none;
}

.page-head {
  text-align: center;
  margin: 26px 0 22px;
}

.page-head h1 {
  margin: 0 0 10px;
  font-size: 34px;
  letter-spacing: -0.5px;
}

.page-head p {
  margin: 0;
  color: var(--muted);
}

/* 上传区 */
.dropzone {
  display: grid;
  place-items: center;
  gap: 10px;
  padding: 46px 20px;
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone:hover,
.dropzone.is-over {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone svg {
  color: var(--accent);
}

.dropzone .hint {
  font-size: 12px;
}

.zone-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin: 14px 0 0;
}

.card {
  margin-top: 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.tabs {
  display: flex;
  gap: 4px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
}

.tab {
  appearance: none;
  border: 0;
  background: none;
  padding: 14px 12px;
  margin-bottom: -1px;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font: inherit;
  white-space: nowrap;
  cursor: pointer;
}

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

.tab[aria-selected="true"] {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-panel {
  padding: 18px;
}

/* 控件条 */
.control-bar {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  padding: 14px 16px;
  background: #fafafa;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.control {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.control > span.label {
  color: var(--muted);
  white-space: nowrap;
}

.control.stack {
  display: grid;
  gap: 2px;
  min-width: 260px;
  flex: 1 1 260px;
}

/* 搜索框占满剩余宽度 */
.control.grow {
  flex: 1 1 240px;
}

.control.grow input {
  width: 100%;
}

.slider-scale {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted);
}

select,
input[type="text"],
input[type="search"],
input[type="number"],
input[type="password"],
textarea {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: inherit;
  font: inherit;
}

textarea {
  width: 100%;
  min-height: 120px;
  resize: vertical;
  line-height: 1.5;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

label.check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
}

.btn {
  appearance: none;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.btn:hover {
  border-color: #cbd5e1;
  background: #f8fafc;
}

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

.btn.primary:hover {
  background: #1d4ed8;
}

.btn.danger {
  color: var(--danger);
  border-color: #fecaca;
}

.btn.danger:hover {
  background: #fef2f2;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 图像画布 */
.stage {
  margin-top: 14px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: repeating-conic-gradient(#f3f4f6 0 25%, #fff 0 50%) 0 0 / 18px 18px;
  overflow: auto;
  max-height: 70vh;
  text-align: center;
}

.stage canvas,
.stage img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
  image-rendering: pixelated;
}

.stage.plain {
  background: #111;
}

.stage-tip {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--muted);
}

/* 结果区 */
.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 22px 0 8px;
  font-size: 15px;
  font-weight: 700;
}

.section-title:first-child {
  margin-top: 0;
}

.kv {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.kv th,
.kv td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}

.kv th {
  width: 220px;
  font-weight: 500;
  color: var(--muted);
}

.kv td {
  word-break: break-word;
}

.kv tr:last-child th,
.kv tr:last-child td {
  border-bottom: 0;
}

.kv.compact th {
  width: 150px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: var(--line-soft);
  color: var(--muted);
}

.badge.ok {
  background: #ecfdf5;
  color: var(--ok);
}

.badge.warn {
  background: #fffbeb;
  color: var(--warn);
}

.badge.bad {
  background: #fef2f2;
  color: var(--danger);
}

.badge.info {
  background: var(--accent-soft);
  color: var(--accent);
}

.note {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: #1e40af;
  font-size: 13px;
}

.note.muted {
  background: #fafafa;
  color: var(--muted);
}

.empty {
  padding: 30px 10px;
  text-align: center;
  color: var(--muted);
}

pre.dump {
  margin: 8px 0 0;
  padding: 12px;
  max-height: 320px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0f172a;
  color: #e2e8f0;
  font: 12px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-all;
}

details.raw {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
}

details.raw > summary {
  cursor: pointer;
  font-size: 14px;
}

/* 写入页布局 */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}

.panel {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.panel h2 {
  margin: 0 0 4px;
  font-size: 17px;
}

.panel p.sub {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 13px;
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 14px;
}

.field > span.label {
  color: var(--muted);
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.capacity {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
}

.meter {
  height: 8px;
  margin-top: 6px;
  border-radius: 999px;
  background: var(--line-soft);
  overflow: hidden;
}

.meter > i {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 0.2s;
}

.meter.over > i {
  background: var(--danger);
}

/* 图案写入页：编辑器布局 */
.editor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 18px;
  align-items: start;
}

.editor-grid .stage {
  margin-top: 0;
}

#editCanvas {
  cursor: move;
  touch-action: none;
  /* 编辑视图是给人看构图的，缩小显示时按常规平滑，别用像素化 */
  image-rendering: auto;
}

#editCanvas:focus-visible {
  outline: 2px solid var(--accent);
}

.layer-list {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 6px;
  background: #fafafa;
}

.layer-empty {
  padding: 12px 8px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.layer-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--bg);
  font-size: 13px;
  cursor: pointer;
}

.layer-row:hover {
  border-color: #cbd5e1;
}

.layer-row.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.layer-row .layer-name {
  flex: 1 1 auto;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.layer-row .mini {
  appearance: none;
  border: 0;
  background: none;
  padding: 2px 4px;
  color: var(--muted);
  font: inherit;
  line-height: 1;
  cursor: pointer;
}

.layer-row .mini:hover {
  color: var(--accent);
}

.layer-row .mini.del:hover {
  color: var(--danger);
}

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

@media (max-width: 860px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .page-head h1 {
    font-size: 26px;
  }

  .shell {
    padding: 14px 14px 48px;
  }

  .kv th {
    width: 130px;
  }
}