/* ===== CSS 变量（主题） ===== */
:root {
  --bg-page: #FFFFFF;
  --bg-tier-row: #E8E8E8;
  --bg-pool: #F5F5F5;
  --text-color: #1A1A1A;
  --border-color: #000000;
  --border-width: 3px;
  --accent-color: #FF0000;
  --item-bg: #FFFFFF;
  --item-shadow: rgba(0,0,0,0.1);
  --hover-shadow: rgba(0,0,0,0.2);
  --toolbar-bg: #FFFFFF;
  --toolbar-border: #E0E0E0;
  --tier-label-text: #000000;
  --empty-hint-color: #999;
  --modal-overlay: rgba(0,0,0,0.5);
  --modal-bg: #FFFFFF;
  --input-bg: #FFFFFF;
  --input-border: #CCC;
  --context-menu-bg: #FFFFFF;
  --context-menu-hover: #F0F0F0;
  --toast-bg: #333;
  --toast-text: #FFF;
}

[data-theme="dark"] {
  --bg-page: #0D0D0D;
  --bg-tier-row: #2A2A2A;
  --bg-pool: #1A1A1A;
  --text-color: #FFFFFF;
  --border-color: #444444;
  --accent-color: #FF4444;
  --item-bg: #333333;
  --item-shadow: rgba(0,0,0,0.3);
  --hover-shadow: rgba(0,0,0,0.5);
  --toolbar-bg: #1A1A1A;
  --toolbar-border: #333;
  --tier-label-text: #000000;
  --empty-hint-color: #666;
  --modal-overlay: rgba(0,0,0,0.7);
  --modal-bg: #2A2A2A;
  --input-bg: #333;
  --input-border: #555;
  --context-menu-bg: #2A2A2A;
  --context-menu-hover: #3A3A3A;
  --toast-bg: #666;
  --toast-text: #FFF;
}

/* ===== 全局重置 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-page);
  color: var(--text-color);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
  overflow-x: hidden;
}

/* ===== 工具栏 ===== */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--toolbar-bg);
  border-bottom: 2px solid var(--toolbar-border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background 0.3s, border-color 0.3s;
}

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

.logo {
  font-size: 22px;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-color);
}

.toolbar-right {
  display: flex;
  gap: 4px;
}

.tool-btn {
  padding: 6px 10px;
  border: 1px solid var(--toolbar-border);
  border-radius: 6px;
  background: var(--toolbar-bg);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  transition: background 0.2s, transform 0.1s;
  color: var(--text-color);
}

.tool-btn:hover {
  background: var(--bg-tier-row);
  transform: scale(1.05);
}

.tool-btn:active {
  transform: scale(0.95);
}

/* ===== Tier 区域 ===== */
.tier-area {
  padding: 16px 20px;
  max-width: 1400px;
  margin: 0 auto;
}

.tier-row {
  display: flex;
  min-height: 100px;
  border-bottom: var(--border-width) solid var(--border-color);
  transition: border-color 0.3s;
}

.tier-label {
  width: 120px;
  min-width: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--tier-color);
  color: var(--tier-label-text);
  font-weight: bold;
  font-size: 28px;
  padding: 8px;
  user-select: none;
  flex-shrink: 0;
}

.tier-sub {
  font-size: 12px;
  opacity: 0.6;
  margin-top: 2px;
}

.tier-items {
  flex: 1;
  background: var(--bg-tier-row);
  padding: 8px;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 6px;
  min-height: 100px;
  transition: background 0.2s, border-color 0.2s;
  position: relative;
}

.tier-items.drag-over {
  background: #D0E8FF;
  border: 2px dashed #007AFF;
}

.tier-items.sortable-empty::after {
  content: '拖拽素材到这里';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--empty-hint-color);
  font-size: 14px;
  pointer-events: none;
}

.tier-actions {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px 6px;
  background: var(--bg-tier-row);
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s;
  flex-shrink: 0;
}

.tier-row:hover .tier-actions {
  opacity: 1;
}

.tier-action-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  padding: 2px;
  border-radius: 4px;
  transition: background 0.2s;
  line-height: 1;
}

.tier-action-btn:hover {
  background: rgba(0,0,0,0.1);
}

[data-theme="dark"] .tier-action-btn:hover {
  background: rgba(255,255,255,0.1);
}

/* ===== 素材池 ===== */
.pool-area {
  padding: 16px 20px;
  max-width: 1400px;
  margin: 0 auto;
  background: var(--bg-pool);
  border-radius: 12px;
  margin-top: 8px;
  margin-bottom: 20px;
  transition: background 0.3s;
}

.pool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.pool-title {
  font-size: 16px;
  color: var(--text-color);
}

.pool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pool-btn {
  padding: 6px 12px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  cursor: pointer;
  font-size: 13px;
  color: var(--text-color);
  transition: background 0.2s;
}

.pool-btn:hover {
  background: var(--bg-tier-row);
}

.pool-items {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 80px;
  padding: 8px;
  border: 2px dashed var(--input-border);
  border-radius: 8px;
  transition: border-color 0.2s, background 0.2s;
}

.pool-items.drag-over {
  border-color: #007AFF;
  background: rgba(0,122,255,0.05);
}

.pool-empty-hint {
  text-align: center;
  color: var(--empty-hint-color);
  padding: 20px;
  font-size: 14px;
}

.pool-input-area {
  margin-bottom: 8px;
}

.text-input-row {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
}

.text-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text-color);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.text-input:focus {
  border-color: #007AFF;
}

.paste-hint {
  padding: 8px 12px;
  background: #E8F4FD;
  border: 1px solid #B3D8F0;
  border-radius: 6px;
  font-size: 13px;
  color: #1A1A1A;
  margin-bottom: 8px;
}

.paste-hint kbd {
  padding: 1px 4px;
  background: #FFF;
  border: 1px solid #CCC;
  border-radius: 3px;
  font-size: 12px;
}

/* ===== 素材卡片 ===== */
.item-card {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  overflow: hidden;
  cursor: grab;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.15s, box-shadow 0.15s;
  box-shadow: 0 1px 3px var(--item-shadow);
  user-select: none;
  background: var(--item-bg);
}

.item-card:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px var(--hover-shadow);
  z-index: 10;
}

.item-card:active {
  cursor: grabbing;
}

.item-card.sortable-ghost {
  opacity: 0.4;
  border: 2px dashed #007AFF;
}

.item-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}

.item-card .item-text {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  text-align: center;
  padding: 4px;
  word-break: break-all;
  overflow: hidden;
  color: var(--text-color);
  background: var(--item-bg);
}

.item-card .item-emoji {
  font-size: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: var(--item-bg);
}

.item-card .item-delete-btn {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  border: none;
  background: rgba(0,0,0,0.5);
  color: white;
  border-radius: 50%;
  font-size: 10px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 1;
  z-index: 5;
}

.item-card:hover .item-delete-btn {
  display: flex;
}

/* ===== 右键菜单 ===== */
.context-menu {
  position: fixed;
  background: var(--context-menu-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  z-index: 1000;
  min-width: 140px;
  display: none;
  overflow: hidden;
}

.context-menu-item {
  padding: 8px 14px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-color);
  transition: background 0.15s;
}

.context-menu-item:hover {
  background: var(--context-menu-hover);
}

/* ===== 弹窗 ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--modal-overlay);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: var(--modal-bg);
  border-radius: 12px;
  min-width: 320px;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--toolbar-border);
}

.modal-title {
  font-size: 16px;
}

.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-color);
  padding: 0 4px;
  line-height: 1;
}

.modal-body {
  padding: 20px;
}

.modal-body label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
}

.modal-body input[type="text"],
.modal-body input[type="color"],
.modal-body select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text-color);
  font-size: 14px;
  margin-bottom: 12px;
  outline: none;
}

.modal-body input[type="text"]:focus {
  border-color: #007AFF;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--toolbar-border);
}

.modal-btn {
  padding: 8px 20px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  background: var(--input-bg);
  color: var(--text-color);
  transition: background 0.2s;
}

.modal-btn-primary {
  background: #007AFF;
  color: white;
  border-color: #007AFF;
}

.modal-btn-primary:hover {
  background: #0056CC;
}

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 10px 18px;
  background: var(--toast-bg);
  color: var(--toast-text);
  border-radius: 8px;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  animation: toast-in 0.3s ease;
  max-width: 360px;
}

.toast.toast-out {
  animation: toast-out 0.3s ease forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(20px); }
}

/* ===== 导出模式 ===== */
.exporting .tier-actions,
.exporting .pool-actions,
.exporting .toolbar-right,
.exporting .pool-input-area,
.exporting .item-delete-btn,
.exporting .pool-header .pool-title {
  display: none !important;
}

/* ===== Emoji 选择器 ===== */
.emoji-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}

.emoji-grid button {
  font-size: 28px;
  padding: 8px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  line-height: 1;
}

.emoji-grid button:hover {
  background: var(--bg-tier-row);
  transform: scale(1.1);
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .tier-label {
    width: 100px;
    min-width: 100px;
    font-size: 22px;
  }
  .item-card {
    width: 70px;
    height: 70px;
  }
}

@media (max-width: 768px) {
  .toolbar {
    padding: 8px 12px;
    flex-wrap: wrap;
    gap: 6px;
  }
  .toolbar-right {
    flex-wrap: wrap;
  }
  .tool-btn {
    padding: 4px 8px;
    font-size: 14px;
  }
  .tier-area, .pool-area {
    padding: 10px 8px;
  }
  .tier-label {
    width: 80px;
    min-width: 80px;
    font-size: 18px;
  }
  .tier-label .tier-sub {
    font-size: 10px;
  }
  .item-card {
    width: 60px;
    height: 60px;
  }
  .item-card .item-text {
    font-size: 11px;
  }
  .pool-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .pool-actions {
    width: 100%;
    justify-content: flex-start;
  }
  .pool-btn {
    font-size: 12px;
    padding: 4px 8px;
  }
}

@media (max-width: 480px) {
  .tier-label {
    width: 60px;
    min-width: 60px;
    font-size: 14px;
    padding: 4px;
  }
  .tier-label .tier-sub {
    font-size: 8px;
  }
  .item-card {
    width: 50px;
    height: 50px;
  }
  .item-card .item-text {
    font-size: 10px;
  }
  .tier-items {
    padding: 4px;
    gap: 4px;
  }
  .tier-actions {
    padding: 4px 3px;
  }
  .tier-action-btn {
    font-size: 12px;
  }
  .pool-items {
    gap: 4px;
    padding: 4px;
  }
}