/* ===== 全局变量 & 重置 ===== */
:root {
  --bg-base:      #f0f2f5;
  --bg-panel:     #ffffff;
  --bg-section:   #f5f7fa;
  --bg-input:     #ffffff;
  --border:       #dce1ea;
  --text-primary: #1a2030;
  --text-muted:   #5a6478;
  --text-hint:    #9aa3b4;
  --accent:       #2b7fff;
  --accent-hover: #1a6be8;
  --success:      #1f9e5e;
  --warning:      #d07800;
  --danger:       #d63c3c;
  --radius:       6px;
  --sidebar-w:    220px;
  --panel-w:      280px;
  --toolbar-h:    40px;
  --transition:   0.15s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  font-size: 13px;
  background: var(--bg-base);
  color: var(--text-primary);
  overflow: hidden;
}

/* ===== 布局 ===== */
body {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--panel-w);
  grid-template-rows: 100vh;
}

/* ===== 左侧边栏 ===== */
#sidebar {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.upload-zone {
  margin: 10px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 16px 10px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  flex-shrink: 0;
}
.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(43, 127, 255, 0.06);
}
.upload-icon { font-size: 22px; margin-bottom: 6px; }
.upload-zone p { color: var(--text-muted); line-height: 1.6; }
.upload-hint { font-size: 11px; color: var(--text-hint); margin-top: 4px; }

#queue-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
}

#image-queue {
  flex: 1;
  overflow-y: auto;
  padding: 0 8px;
}

.queue-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition);
  border: 1px solid transparent;
  margin-bottom: 4px;
}
.queue-item:hover { background: var(--bg-section); }
.queue-item.active {
  background: rgba(43, 127, 255, 0.08);
  border-color: var(--accent);
}

.queue-thumb {
  width: 44px;
  height: 36px;
  object-fit: cover;
  border-radius: 3px;
  background: var(--bg-section);
  flex-shrink: 0;
}

.queue-info { flex: 1; overflow: hidden; }
.queue-name {
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}
.queue-status { font-size: 10px; color: var(--text-muted); margin-top: 2px; }

.queue-remove {
  background: none;
  border: none;
  color: var(--text-hint);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 14px;
  line-height: 1;
  flex-shrink: 0;
  transition: color var(--transition);
}
.queue-remove:hover { color: var(--danger); }

/* 状态徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
}
.badge-idle    { background: #eef0f5;               color: var(--text-muted); }
.badge-loading { background: rgba(43,127,255,.12);  color: var(--accent); }
.badge-done    { background: rgba(31,158, 94,.12);  color: var(--success); }
.badge-applied { background: rgba(31,158, 94,.18);  color: var(--success); }
.badge-error   { background: rgba(214, 60, 60,.12); color: var(--danger); }
.badge-warn    { background: rgba(208,120,  0,.12); color: var(--warning); }

#batch-bar {
  display: flex;
  gap: 6px;
  padding: 8px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
#batch-bar button { flex: 1; padding: 6px 4px; font-size: 11px; }

/* ===== 中间画布区 ===== */
#canvas-area {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #e4e8ef;
}

#canvas-toolbar {
  height: var(--toolbar-h);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 10px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.coord-label {
  margin-left: auto;
  font-size: 11px;
  color: var(--text-hint);
  font-family: monospace;
}
#zoom-label {
  font-size: 11px;
  color: var(--text-muted);
  min-width: 40px;
  text-align: center;
}

#canvas-container {
  flex: 1;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
}
#canvas-container.grabbing { cursor: grabbing; }

#canvas-wrapper {
  position: relative;
  display: inline-block;
  transform-origin: center center;
  box-shadow: 0 4px 24px rgba(0,0,0,0.18);
}

#main-canvas    { display: block; }
#overlay-canvas {
  position: absolute;
  top: 0; left: 0;
  pointer-events: none;
}

#empty-hint {
  position: absolute;
  text-align: center;
  color: var(--text-hint);
  pointer-events: none;
}
#empty-hint.hidden { display: none; }
.empty-icon { font-size: 48px; margin-bottom: 12px; }
#empty-hint p { font-size: 14px; }

/* ===== 右侧控制面板 ===== */
#control-panel {
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}

.panel-section {
  border-bottom: 1px solid var(--border);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  text-transform: uppercase;
  user-select: none;
  transition: color var(--transition);
}
.section-header:hover { color: var(--text-primary); }
.toggle-icon { transition: transform var(--transition); font-size: 12px; }
.section-header.collapsed .toggle-icon { transform: rotate(-90deg); }

.section-body {
  padding: 4px 14px 12px;
}
.section-body.hidden { display: none; }

/* ===== 表单元素 ===== */
.field-group-title {
  font-size: 11px;
  color: var(--text-hint);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 10px 0 5px;
}

.field-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 7px;
  flex-wrap: wrap;
}
.field-row label {
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 56px;
}

input[type="number"],
input[type="text"],
input[type="password"],
select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  padding: 5px 8px;
  font-size: 12px;
  outline: none;
  transition: border-color var(--transition);
  -moz-appearance: textfield;
}
input[type="number"]::-webkit-inner-spin-button { display: none; }
input:focus, select:focus { border-color: var(--accent); }

.input-sm   { width: 60px; }
.input-md   { width: 90px; }
.input-full { width: 100%; flex: 1; }
.fields-group .input-full { width: auto; flex: 1; }

.unit-label { font-size: 11px; color: var(--text-hint); }
.hint-text  { font-size: 11px; color: var(--text-hint); margin-top: 4px; line-height: 1.5; }

input[type="color"] {
  width: 36px;
  height: 28px;
  padding: 2px;
  border-radius: var(--radius);
  cursor: pointer;
}
.input-color { flex-shrink: 0; }

/* 位置预设按钮 */
.position-presets {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
  margin-bottom: 7px;
}
.preset-btn {
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  padding: 6px 4px;
  cursor: pointer;
  font-size: 14px;
  transition: all var(--transition);
  text-align: center;
}
.preset-btn:hover  { border-color: var(--accent); color: var(--accent); }
.preset-btn.active { border-color: var(--accent); background: rgba(43,127,255,.1); color: var(--accent); }

/* 检测状态 */
.detection-status {
  min-height: 20px;
  margin: 6px 0;
  font-size: 12px;
  color: var(--text-muted);
}
.detection-status.loading { color: var(--accent); }
.detection-status.error   { color: var(--danger); }
.detection-status.success { color: var(--success); }

/* ===== 操作按钮区 ===== */
.panel-actions {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-top: auto;
  border-bottom: none;
}

/* ===== 按钮样式 ===== */
button {
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
  transition: all var(--transition);
  padding: 7px 14px;
  font-weight: 500;
}
button:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }

.btn-secondary {
  background: var(--bg-section);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }

.btn-link {
  background: none;
  color: var(--text-muted);
  padding: 4px 8px;
}
.btn-link:hover:not(:disabled) { color: var(--accent); }

.btn-icon {
  background: var(--bg-section);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 5px 10px;
  font-size: 15px;
  line-height: 1;
}
.btn-icon:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }

.btn-sm   { padding: 5px 10px; font-size: 12px; }
.btn-full { width: 100%; }

/* ===== 进度遮罩 ===== */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.progress-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 32px;
  text-align: center;
  min-width: 300px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}
.progress-box p { margin-bottom: 12px; }
#progress-detail { font-size: 11px; color: var(--text-muted); margin-top: 8px; margin-bottom: 0; }
.progress-bar-wrap {
  background: var(--bg-input);
  border-radius: 4px;
  height: 8px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s ease;
}

/* ===== Toast ===== */
#toast-container {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2000;
  pointer-events: none;
}
.toast {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 18px;
  font-size: 13px;
  color: var(--text-primary);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
  animation: toast-in 0.2s ease;
  white-space: nowrap;
}
.toast.success { border-color: var(--success); color: var(--success); }
.toast.error   { border-color: var(--danger);  color: var(--danger); }
.toast.warning { border-color: var(--warning); color: var(--warning); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-hint); }