/* ============ 设计 Token ============ */
:root {
  --primary-1: #5B6CFF;
  --primary-2: #8B5CF6;
  --bg-app: #F5F6FA;
  --bg-card: #FFFFFF;
  --text-1: #1F2937;
  --text-2: #6B7280;
  --text-3: #9CA3AF;
  --border: #E5E7EB;
  --border-strong: #D1D5DB;
  --success: #10B981;
  --danger: #EF4444;
  --warning: #F59E0B;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 14px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.12);

  --font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: var(--font-sans); color: var(--text-1); }
body {
  background: linear-gradient(180deg, #F5F6FA 0%, #EEF0F7 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.hidden { display: none !important; }

/* ============ 顶部标题栏 ============ */
.header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-1) 0%, var(--primary-2) 100%);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 14px rgba(91, 108, 255, 0.32);
}
.brand-title { font-size: 20px; font-weight: 600; margin: 0; line-height: 1.2; }
.brand-sub { font-size: 13px; color: var(--text-2); margin: 2px 0 0; }

.mode-switcher {
  display: inline-flex;
  background: var(--bg-app);
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.mode-btn {
  border: none;
  background: transparent;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.mode-btn:hover { color: var(--text-1); }
.mode-btn.active {
  background: #fff;
  color: var(--text-1);
  box-shadow: var(--shadow-sm);
}

/* ============ 设备 tab（单张模式专属） ============ */
.device-bar {
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.65);
}
.device-bar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.device-switcher {
  display: inline-flex;
  gap: 6px;
  background: var(--bg-app);
  padding: 4px;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.device-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: none;
  background: transparent;
  padding: 6px 12px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--text-2);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: inherit;
}
.device-btn:hover { color: var(--text-1); }
.device-btn.active {
  background: linear-gradient(135deg, var(--primary-1) 0%, var(--primary-2) 100%);
  color: #fff;
  box-shadow: 0 2px 8px rgba(91, 108, 255, 0.28);
}
.device-btn svg { flex: none; }

/* ============ 主布局 ============ */
.main-grid {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 24px;
  flex: 1;
}
@media (max-width: 960px) {
  .main-grid { grid-template-columns: 1fr; }
}

/* ============ 左侧操作面板 ============ */
.panel {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 4px;
  align-self: start;
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.panel-section {
  padding: 18px 18px;
  border-bottom: 1px solid var(--border);
}
.panel-section:last-child { border-bottom: none; }
.section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.3px;
  margin: 0 0 12px;
  text-transform: uppercase;
}

/* 上传区 */
.drop-zone {
  display: block;
  cursor: pointer;
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 22px 16px;
  text-align: center;
  transition: all 0.25s ease;
  background: #fbfbfd;
}
.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--primary-1);
  background: rgba(91, 108, 255, 0.04);
  transform: translateY(-1px);
}
.drop-inner {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--text-2);
}
.drop-text { display: flex; flex-direction: column; gap: 2px; }
.drop-main { font-size: 14px; font-weight: 500; color: var(--text-1); }
.drop-sub { font-size: 12px; color: var(--text-3); }
.drop-hint { margin-top: 10px; font-size: 11px; color: var(--text-3); }

/* 输入框 */
.title-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text-1);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.title-input:focus {
  outline: none;
  border-color: var(--primary-1);
  box-shadow: 0 0 0 3px rgba(91, 108, 255, 0.14);
}
.hint { font-size: 12px; color: var(--text-3); margin-top: 6px; }

/* 调色板 */
.palette {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}
.palette .swatch {
  width: 36px; height: 36px;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: var(--shadow-sm);
  position: relative;
  cursor: help;
  transition: transform 0.15s;
}
.palette .swatch:hover { transform: translateY(-2px); }
.palette .swatch .tip {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-1);
  color: #fff;
  font-size: 11px;
  padding: 3px 6px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.palette .swatch:hover .tip { opacity: 1; }
.palette-legend {
  display: flex; gap: 16px; font-size: 12px; color: var(--text-2);
}
.palette-legend .dot {
  display: inline-block; width: 10px; height: 10px; border-radius: 999px;
  margin-right: 6px; vertical-align: middle;
  border: 1px solid rgba(0,0,0,0.1);
}

/* 主按钮 */
.actions { display: flex; flex-direction: column; gap: 10px; }
.btn-primary {
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  background: linear-gradient(135deg, var(--primary-1) 0%, var(--primary-2) 100%);
  box-shadow: 0 6px 16px rgba(91, 108, 255, 0.28);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(91, 108, 255, 0.36);
}
.btn-primary:active:not(:disabled) { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }

/* 批量列表 */
.batch-list {
  display: flex; flex-direction: column; gap: 8px;
  max-height: 340px; overflow-y: auto;
}
.batch-empty {
  padding: 20px 12px; font-size: 12px;
  color: var(--text-3); text-align: center;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm); background: #fbfbfd;
}
.batch-item {
  display: flex; gap: 10px; align-items: center;
  padding: 8px; background: #fbfbfd;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.batch-item .thumb {
  width: 48px; height: 32px; object-fit: cover;
  border-radius: 4px; flex: none;
  background: #eee;
}
.batch-item .field {
  flex: 1; display: flex; flex-direction: column; gap: 3px;
}
.batch-item .fname {
  font-size: 11px; color: var(--text-3);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.batch-item .tinput {
  padding: 5px 8px; font-size: 12px;
  border: 1px solid var(--border); border-radius: 5px; background: #fff;
  font-family: inherit;
}
.batch-item .tinput:focus {
  outline: none; border-color: var(--primary-1);
}
.batch-item .remove {
  border: none; background: transparent; color: var(--text-3);
  cursor: pointer; padding: 4px; border-radius: 4px;
  font-size: 18px; line-height: 1;
}
.batch-item .remove:hover { color: var(--danger); background: rgba(239,68,68,0.08); }

/* ============ 右侧预览 ============ */
.preview-wrap { display: flex; flex-direction: column; gap: 16px; }
.preview-meta {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.badge {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(91,108,255,0.1);
  color: var(--primary-1);
  font-size: 12px;
  font-weight: 500;
  border-radius: 999px;
}
.render-time { font-size: 12px; color: var(--text-3); }

.preview-stage {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  padding: 24px;
  min-height: 480px;
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.preview-stage::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(45deg, #f0f0f3 25%, transparent 25%),
    linear-gradient(-45deg, #f0f0f3 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #f0f0f3 75%),
    linear-gradient(-45deg, transparent 75%, #f0f0f3 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  opacity: 0.35;
  pointer-events: none;
}
#preview-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 0;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.18);
  position: relative;
  z-index: 1;
  /* 让小尺寸（Pad/手机）按 1:1 像素呈现，不被拉伸 */
  image-rendering: -webkit-optimize-contrast;
}
.preview-placeholder {
  position: absolute; inset: 24px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--text-3); gap: 14px; text-align: center;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1.5px dashed var(--border);
  z-index: 2;
}
.preview-placeholder p { margin: 0; font-size: 14px; }

/* 批量预览 */
.batch-grid {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  padding: 20px;
  min-height: 480px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  align-content: start;
}
.batch-grid-empty {
  grid-column: 1 / -1;
  display: flex; align-items: center; justify-content: center;
  min-height: 360px; color: var(--text-3); text-align: center;
  padding: 32px;
}
.batch-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}
.batch-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.batch-card canvas, .batch-card img {
  display: block; width: 100%; height: auto; background: #eee;
}
.batch-card .cap {
  padding: 10px 12px;
  font-size: 12px; color: var(--text-2);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  border-top: 1px solid var(--border);
}
.batch-card.processing .cap { color: var(--primary-1); }
.batch-card.done .cap { color: var(--success); }
.batch-card.error .cap { color: var(--danger); }

/* ============ 批量端选择（复选框组） ============ */
.batch-device-pick {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.bdp-item {
  flex: 1 1 0;
  min-width: 84px;
  cursor: pointer;
  user-select: none;
}
.bdp-item input { display: none; }
.bdp-card {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 8px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: #fbfbfd;
  text-align: center;
  transition: all 0.18s ease;
}
.bdp-card .bdp-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-1);
}
.bdp-card .bdp-size {
  font-size: 11px;
  color: var(--text-3);
}
.bdp-item:hover .bdp-card {
  border-color: var(--primary-1);
  background: #fafbff;
}
.bdp-item input:checked + .bdp-card {
  border-color: var(--primary-1);
  background: rgba(91, 108, 255, 0.08);
  box-shadow: 0 0 0 2px rgba(91, 108, 255, 0.12);
}
.bdp-item input:checked + .bdp-card .bdp-name {
  color: var(--primary-1);
}

/* ============ 批量预览：按端分组 ============ */
.batch-group {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
}
.batch-group:last-child { border-bottom: none; padding-bottom: 0; }
.batch-group-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 2px;
}
.batch-group-head .bg-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-1);
  padding: 3px 10px;
  background: linear-gradient(135deg, var(--primary-1) 0%, var(--primary-2) 100%);
  color: #fff;
  border-radius: 999px;
}
.batch-group-head .bg-size {
  font-size: 12px;
  color: var(--text-3);
}
.batch-group-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.batch-group-cards .batch-card canvas {
  /* 让小尺寸（pad/手机）也能撑满卡片宽度，按比例呈现 */
  width: 100%;
  height: auto;
  background: #eee;
  image-rendering: -webkit-optimize-contrast;
}

/* ============ 底部状态栏 ============ */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  margin-top: auto;
}
.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px;
}
.status-item {
  font-size: 12px; color: var(--text-2);
  display: inline-flex; align-items: center; gap: 6px;
}
.status-item.muted { color: var(--text-3); }
.status-dot {
  width: 8px; height: 8px; border-radius: 999px;
  background: var(--text-3);
}
.status-dot.loading { background: var(--warning); animation: pulse 1.4s ease-in-out infinite; }
.status-dot.ready { background: var(--success); }
.status-dot.error { background: var(--danger); }
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* ============ 模式切换 ============ */
body[data-mode="single"] .batch-only { display: none !important; }
body[data-mode="batch"]  .single-only { display: none !important; }

/* ---------- 羽化面板：锁定/解锁态 ---------- */
.feather-locked input[type="range"] {
  opacity: 0.35;
  pointer-events: none;
  filter: grayscale(1);
  accent-color: #9ca3af !important;
}
.feather-locked .section-label,
.feather-locked .range-val {
  color: #9ca3af !important;
}

.btn-unlock {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 10px 14px;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #ff4d4f 0%, #e11d48 100%);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s, opacity 0.12s;
  box-shadow: 0 4px 10px rgba(225, 29, 72, 0.25);
  margin-bottom: 10px;
}
.btn-unlock:hover { transform: translateY(-1px); box-shadow: 0 6px 14px rgba(225, 29, 72, 0.35); }
.btn-unlock:active { transform: translateY(0); }
.btn-unlock.unlocked {
  background: #e5e7eb;
  color: #6b7280;
  box-shadow: none;
}
.btn-unlock.unlocked:hover { transform: none; box-shadow: none; }

/* ---------- 开关组件 ---------- */
.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding: 10px 12px;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  cursor: pointer;
  user-select: none;
  transition: border-color 0.15s, background 0.15s;
}
.switch-row:hover { border-color: var(--primary-1); background: #fafbff; }
.switch-label { font-size: 14px; color: #374151; font-weight: 500; }

.switch { position: relative; width: 40px; height: 22px; display: inline-block; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch-slider {
  position: absolute; inset: 0; background: #d1d5db;
  border-radius: 22px; transition: background 0.18s;
}
.switch-slider::before {
  content: "";
  position: absolute; left: 3px; top: 3px;
  width: 16px; height: 16px;
  background: #fff; border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.18);
  transition: transform 0.18s;
}
.switch input:checked + .switch-slider { background: var(--primary-1); }
.switch input:checked + .switch-slider::before { transform: translateX(18px); }