/**
 * Fab 组件样式 - 100% 一比一复刻 MUI
 * 对应 MUI: packages/mui-material/src/Fab/Fab.js
 */

/* =============================================
   Root 基础样式
   ============================================= */
.MuiFab-root {
  font-family: "Roboto", "Helvetica", "Arial", sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
  line-height: 1.75;
  letter-spacing: 0.02857em;
  text-transform: uppercase;
  min-height: 36px;
  transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,
              box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms,
              border-color 250ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;
  border-radius: 50%;
  padding: 0;
  min-width: 0;
  width: 56px;
  height: 56px;
  z-index: 1050;
  box-shadow: 0px 3px 5px -1px rgba(0,0,0,0.2), 0px 6px 10px 0px rgba(0,0,0,0.14), 0px 1px 18px 0px rgba(0,0,0,0.12);
  color: rgba(0, 0, 0, 0.87);
  background-color: #e0e0e0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
  margin: 0;
  user-select: none;
  vertical-align: middle;
  -webkit-tap-highlight-color: transparent;
}

.MuiFab-root:hover {
  background-color: #d5d5d5;
  text-decoration: none;
}

.MuiFab-root:active {
  box-shadow: 0px 7px 8px -4px rgba(0,0,0,0.2), 0px 12px 17px 2px rgba(0,0,0,0.14), 0px 5px 22px 4px rgba(0,0,0,0.12);
}

/* =============================================
   尺寸变体
   ============================================= */
.MuiFab-sizeSmall {
  width: 40px;
  height: 40px;
  min-height: 40px;
}

.MuiFab-sizeMedium {
  width: 48px;
  height: 48px;
  min-height: 48px;
}

.MuiFab-sizeLarge {
  width: 56px;
  height: 56px;
  min-height: 56px;
}

/* =============================================
   变体
   ============================================= */
.MuiFab-extended {
  border-radius: 16px;
  padding: 0 16px;
  width: auto;
  min-width: 48px;
  min-height: 48px;
  height: auto;
}

.MuiFab-extended.MuiFab-sizeSmall {
  padding: 0 8px;
  width: auto;
  min-width: 48px;
  min-height: 34px;
}

.MuiFab-extended.MuiFab-sizeMedium {
  width: auto;
  min-width: 48px;
  min-height: 48px;
}

.MuiFab-extended.MuiFab-sizeLarge {
  width: auto;
  min-width: 56px;
  min-height: 56px;
}

/* =============================================
   颜色变体
   ============================================= */
.MuiFab-primary {
  color: #fff;
  background-color: #1976d2;
}

.MuiFab-primary:hover {
  background-color: #1565c0;
}

.MuiFab-secondary {
  color: #fff;
  background-color: #9c27b0;
}

.MuiFab-secondary:hover {
  background-color: #7b1fa2;
}

.MuiFab-colorInherit {
  color: inherit;
}

.MuiFab-error {
  color: #fff;
  background-color: #d32f2f;
}

.MuiFab-error:hover {
  background-color: #c62828;
}

.MuiFab-info {
  color: #fff;
  background-color: #0288d1;
}

.MuiFab-info:hover {
  background-color: #0277bd;
}

.MuiFab-success {
  color: #fff;
  background-color: #2e7d32;
}

.MuiFab-success:hover {
  background-color: #1b5e20;
}

.MuiFab-warning {
  color: #fff;
  background-color: #ed6c02;
}

.MuiFab-warning:hover {
  background-color: #e65100;
}

/* =============================================
   禁用状态
   ============================================= */
.MuiFab-root.Mui-disabled {
  color: rgba(0, 0, 0, 0.26);
  box-shadow: none;
  background-color: rgba(0, 0, 0, 0.12);
  cursor: default;
  pointer-events: none;
}

/* =============================================
   焦点状态
   ============================================= */
.MuiFab-focusVisible {
  box-shadow: 0px 3px 5px -1px rgba(0,0,0,0.2), 0px 6px 10px 0px rgba(0,0,0,0.14), 0px 1px 18px 0px rgba(0,0,0,0.12);
}