/* ============================================================
 * sam-fun.css — 小窝全站趣味特效（WorkBuddy 2026-10-17）
 * 配合 sam-fun.js 使用；所有样式均有前缀，不影响主题本身
 * ============================================================ */

/* ---- 阅读进度条 ---- */
#sam-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  z-index: 2147483000;
  pointer-events: none;
  background: linear-gradient(90deg,
      hsl(var(--hue, 250) 90% 60%),
      hsl(calc(var(--hue, 250) + 60) 90% 62%));
  border-radius: 0 2px 2px 0;
  opacity: 0;
  transition: opacity .3s ease;
  will-change: transform;
}
#sam-progress.sam-on { opacity: 1; }

/* ---- 点击粒子画布 ---- */
#sam-fx-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 2147483000;
}

/* ---- Toast 提示 ---- */
#sam-toast {
  position: fixed;
  left: 50%;
  bottom: 2.2rem;
  transform: translateX(-50%) translateY(20px);
  max-width: min(86vw, 26rem);
  padding: .7rem 1.1rem;
  border-radius: 1rem;
  background: rgba(20, 22, 34, .88);
  color: #f3f4f6;
  font-size: .86rem;
  line-height: 1.55;
  text-align: center;
  box-shadow: 0 8px 30px rgba(0, 0, 0, .25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2147483000;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
}
#sam-toast.sam-on {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
#sam-toast b { color: hsl(var(--hue, 250) 95% 72%); font-weight: 700; }

/* ---- 快捷键帮助卡片 ---- */
#sam-help {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  width: 15.5rem;
  padding: 1rem 1.1rem;
  border-radius: 1.1rem;
  background: rgba(255, 255, 255, .92);
  border: 1px solid rgba(0, 0, 0, .08);
  color: #1e293b;
  box-shadow: 0 10px 40px rgba(0, 0, 0, .18);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2147483000;
  font-size: .82rem;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(12px) scale(.97);
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
}
html.dark #sam-help {
  background: rgba(30, 32, 44, .94);
  border-color: rgba(255, 255, 255, .1);
  color: #e5e7eb;
}
#sam-help.sam-on {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
#sam-help h4 {
  margin: 0 0 .5rem;
  font-size: .95rem;
  font-weight: 800;
  color: hsl(var(--hue, 250) 80% 52%);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#sam-help .sam-krow {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin: .3rem 0;
}
#sam-help kbd {
  display: inline-block;
  min-width: 1.5rem;
  padding: .1rem .38rem;
  border-radius: .45rem;
  border: 1px solid rgba(0, 0, 0, .15);
  border-bottom-width: 2px;
  background: rgba(0, 0, 0, .04);
  font: 700 .72rem/1.4 ui-monospace, monospace;
  text-align: center;
  flex-shrink: 0;
}
html.dark #sam-help kbd {
  border-color: rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .07);
}
#sam-help .sam-hint {
  margin-top: .6rem;
  padding-top: .55rem;
  border-top: 1px dashed rgba(0, 0, 0, .12);
  color: rgba(100, 116, 139, .9);
  font-size: .74rem;
}
html.dark #sam-help .sam-hint { border-top-color: rgba(255, 255, 255, .12); }
#sam-help .sam-close {
  cursor: pointer;
  font-size: .85rem;
  opacity: .55;
  transition: opacity .15s;
}
#sam-help .sam-close:hover { opacity: 1; }

/* ---- 彩蛋掉落 emoji ---- */
.sam-fall {
  position: fixed;
  top: -2rem;
  z-index: 2147483000;
  pointer-events: none;
  user-select: none;
  will-change: transform;
  font-size: 1.6rem;
}

/* ---- 减弱动态效果：全部关闭 ---- */
@media (prefers-reduced-motion: reduce) {
  #sam-progress { display: none; }
}