/*
  文件：static/css/avatar.css
  作用：抽象 SVG 头像样式（含 5 套方案 + demo 切换器）
  创建：2026-09-12
  作者：大军 + 小军

  设计：
  - 5 套头像（1-5），默认显示 avatar-1（圆形 + "大"字）
  - demo 切换器：浮动面板，右下角，可展开选择 5 套预览
  - 暗色主题支持（CSS 变量）
  - 响应式（不同位置用不同 size）
*/

/* ============================================
   头像容器基础样式
   ============================================ */

.avatar {
  display: inline-block;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  /* 默认：圆形 */
  border-radius: 50%;
  /* 阴影（可选） */
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: transform 0.3s, box-shadow 0.3s;
}

.avatar:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.avatar svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* 位置变体 */
.avatar-sm  { width: 32px;  height: 32px; }
.avatar-md  { width: 64px;  height: 64px; }
.avatar-lg  { width: 96px;  height: 96px; }
.avatar-xl  { width: 128px; height: 128px; }
.avatar-2xl { width: 160px; height: 160px; }

/* ============================================
   Hero 区头像（首页 + 关于我）
   ============================================ */

.hero-avatar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.hero-avatar {
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(59, 130, 246, 0.3);
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
}

.hero-avatar:hover {
  transform: scale(1.05) rotate(3deg);
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.4);
}

/* ============================================
   About 页头像
   ============================================ */

.about-hero-avatar-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.about-avatar-placeholder {
  border-radius: 50%;
  overflow: hidden;
  background: var(--color-bg-secondary, #f1f5f9);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.2);
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
}

.about-avatar-placeholder:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
}

.about-avatar-placeholder svg,
.about-avatar-placeholder img {
  display: block;
  width: 100%;
  height: 100%;
}

.about-avatar-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary, #64748b);
  text-align: center;
  line-height: 1.4;
}

.about-avatar-label small {
  display: block;
  font-size: 0.7rem;
  opacity: 0.7;
}

/* ============================================
   暗色主题适配
   ============================================ */

[data-theme="dark"] .hero-avatar {
  box-shadow: 0 4px 24px rgba(59, 130, 246, 0.4);
}

[data-theme="dark"] .about-avatar-placeholder {
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

/* ============================================
   Demo 切换器面板（浮动右下角）
   ============================================ */

.avatar-demo-panel {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  font-family: system-ui, sans-serif;
}

/* 切换按钮 */
.avatar-demo-toggle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary, #3b82f6);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.avatar-demo-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.5);
}

/* 面板（默认隐藏）*/
.avatar-demo-panel .demo-options {
  display: none;
  position: absolute;
  bottom: 52px;
  right: 0;
  background: var(--color-bg, white);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  min-width: 200px;
}

.avatar-demo-panel.open .demo-options {
  display: block;
}

.demo-options-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary, #64748b);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 10px;
  padding: 0 4px;
}

.demo-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.demo-option:hover {
  background: var(--color-bg-secondary, #f1f5f9);
}

.demo-option.active {
  background: rgba(59, 130, 246, 0.1);
}

.demo-option-swatch {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  border: 2px solid transparent;
}

.demo-option.active .demo-option-swatch {
  border-color: var(--color-primary, #3b82f6);
}

.demo-option-swatch svg,
.demo-option-swatch img {
  width: 100%;
  height: 100%;
  object-fit: cover;  /* 关键：256x256 JPG 缩到 36x36 缩略图不拉成色块 */
}

.demo-option-label {
  font-size: 0.85rem;
  color: var(--color-text, #1e293b);
  font-weight: 500;
}

/* 移动端隐藏 demo 切换器 */
@media (max-width: 768px) {
  .avatar-demo-panel {
    display: none;
  }
}

/* ============================================
   About 页头像 img 标签样式（替换 span 占位）
   ============================================ */

.about-hero-avatar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.about-avatar-img {
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.2);
  transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
  display: block;
}

.about-avatar-img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
}

[data-theme="dark"] .about-avatar-img {
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}