/* SVG图标样式 */
.icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  fill: currentColor;
  vertical-align: middle;
}

/* 图标尺寸 */
.icon-xs { width: 0.75em; height: 0.75em; }
.icon-sm { width: 0.875em; height: 0.875em; }
.icon-lg { width: 1.33em; height: 1.33em; }
.icon-xl { width: 1.5em; height: 1.5em; }
.icon-2xl { width: 2em; height: 2em; }
.icon-3xl { width: 3em; height: 3em; }
.icon-4xl { width: 4em; height: 4em; }

/* 图标动画 */
.icon-spin {
  animation: icon-spin 1s linear infinite;
}

@keyframes icon-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 图标颜色 */
.icon-primary { fill: var(--primary-color, #007bff); }
.icon-secondary { fill: var(--secondary-color, #6c757d); }
.icon-success { fill: var(--success-color, #28a745); }
.icon-danger { fill: var(--danger-color, #dc3545); }
.icon-warning { fill: var(--warning-color, #ffc107); }
.icon-info { fill: var(--info-color, #17a2b8); }
.icon-light { fill: var(--light-color, #f8f9fa); }
.icon-dark { fill: var(--dark-color, #343a40); }

/* 图标对齐 */
.icon-pull-left { float: left; margin-right: 0.3em; }
.icon-pull-right { float: right; margin-left: 0.3em; }

/* 图标边框 */
.icon-border {
  border: 0.08em solid currentColor;
  border-radius: 0.1em;
  padding: 0.2em 0.25em 0.15em;
}

/* 图标固定宽度 */
.icon-fw {
  width: 1.28571429em;
  text-align: center;
}

/* 图标列表 */
.icon-ul {
  list-style-type: none;
  margin-left: 2.5em;
  padding-left: 0;
}

.icon-ul > li {
  position: relative;
}

.icon-li {
  position: absolute;
  left: -2em;
  width: 2em;
  text-align: center;
  line-height: inherit;
}

/* 响应式图标 */
@media (max-width: 768px) {
  .icon-responsive {
    width: 1.2em;
    height: 1.2em;
  }
}

/* 图标组合 */
.icon-stack {
  position: relative;
  display: inline-block;
  width: 2em;
  height: 2em;
  line-height: 2em;
  vertical-align: middle;
}

.icon-stack-1x,
.icon-stack-2x {
  position: absolute;
  left: 0;
  width: 100%;
  text-align: center;
}

.icon-stack-1x { line-height: inherit; }
.icon-stack-2x { font-size: 2em; }

.icon-stack-1x .icon,
.icon-stack-2x .icon {
  width: 1em;
  height: 1em;
}

/* 图标旋转 */
.icon-rotate-90 { transform: rotate(90deg); }
.icon-rotate-180 { transform: rotate(180deg); }
.icon-rotate-270 { transform: rotate(270deg); }

/* 图标翻转 */
.icon-flip-horizontal { transform: scale(-1, 1); }
.icon-flip-vertical { transform: scale(1, -1); }

/* 图标淡入淡出 */
.icon-fade {
  opacity: 0.5;
}

.icon-fade:hover {
  opacity: 1;
}

/* 图标脉冲 */
.icon-pulse {
  animation: icon-pulse 1s infinite;
}

@keyframes icon-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

/* 图标弹跳 */
.icon-bounce {
  animation: icon-bounce 1s infinite;
}

@keyframes icon-bounce {
  0%, 20%, 53%, 80%, 100% { transform: translate3d(0,0,0); }
  40%, 43% { transform: translate3d(0,-8px,0); }
  70% { transform: translate3d(0,-4px,0); }
  90% { transform: translate3d(0,-2px,0); }
}

/* 图标闪烁 */
.icon-beat {
  animation: icon-beat 1s infinite;
}

@keyframes icon-beat {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

/* 图标摇摆 */
.icon-shake {
  animation: icon-shake 0.5s infinite;
}

@keyframes icon-shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-2px); }
  20%, 40%, 60%, 80% { transform: translateX(2px); }
}

/* 图标渐变 */
.icon-gradient {
  background: linear-gradient(45deg, #007bff, #28a745);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 图标阴影 */
.icon-shadow {
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

/* 图标悬停效果 */
.icon-hover {
  transition: all 0.3s ease;
}

.icon-hover:hover {
  transform: scale(1.1);
  filter: brightness(1.2);
}

/* 图标加载状态 */
.icon-loading {
  opacity: 0.6;
  pointer-events: none;
}

/* 图标禁用状态 */
.icon-disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* 图标激活状态 */
.icon-active {
  fill: var(--accent-color, #007bff);
  transform: scale(1.1);
}

/* 图标选中状态 */
.icon-selected {
  fill: var(--success-color, #28a745);
  background-color: rgba(40, 167, 69, 0.1);
  border-radius: 50%;
  padding: 0.2em;
}

/* 图标错误状态 */
.icon-error {
  fill: var(--danger-color, #dc3545);
  animation: icon-error-shake 0.5s ease-in-out;
}

@keyframes icon-error-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* 图标成功状态 */
.icon-success {
  fill: var(--success-color, #28a745);
  animation: icon-success-bounce 0.6s ease-in-out;
}

@keyframes icon-success-bounce {
  0% { transform: scale(0.3); opacity: 0; }
  50% { transform: scale(1.05); }
  70% { transform: scale(0.9); }
  100% { transform: scale(1); opacity: 1; }
}

/* 图标警告状态 */
.icon-warning {
  fill: var(--warning-color, #ffc107);
  animation: icon-warning-pulse 2s infinite;
}

@keyframes icon-warning-pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

/* 图标信息状态 */
.icon-info {
  fill: var(--info-color, #17a2b8);
  animation: icon-info-rotate 2s infinite linear;
}

@keyframes icon-info-rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 图标主题相关 */
[data-theme="dark"] .icon {
  fill: var(--text-color, #ffffff);
}

[data-theme="light"] .icon {
  fill: var(--text-color, #333333);
}

/* 图标可访问性 */
.icon[aria-hidden="true"] {
  display: none;
}

.icon[aria-label] {
  cursor: help;
}

/* 图标打印样式 */
@media print {
  .icon {
    fill: #000000 !important;
  }
  
  .icon-no-print {
    display: none !important;
  }
}