/* ════════════════════════════════════════════════════════════════════
   photoreal — 顶栏 Photoreal 模式开关 + 1100ms 三层动画
   规范同 quality.css：flush 进 .topbar-perf-group（无 border + radius，
   靠组容器统一 clip）。动画分三层：A 棱镜扫光 / B 双环 spectral bloom /
   C 图标核心微亮。off→on 全播；on→off 只播 A 反向 + 单环 fade。
   ════════════════════════════════════════════════════════════════════ */

.topbar-perf-group .photoreal-toggle {
  height: 100%;
  width: 32px;
  margin: 0;
  border: none;
  border-left: 1px solid var(--line-1, #e5e5ea);   /* hairline divider */
  border-radius: 0;
  background: transparent;
  cursor: pointer;
  color: var(--ink-2, #3f3f46);
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 160ms ease, background-color 160ms ease;
  --pr-spectral: conic-gradient(from 0deg,
    var(--wl-405), var(--sig-select), var(--wl-532),
    var(--sig-warn), var(--wl-1064), var(--wl-405));
}
.topbar-perf-group .photoreal-toggle:hover {
  color: var(--ink-1, #0d0d0f);
  background: var(--overlay-1, rgba(0, 0, 0, 0.04));
}

/* ── 图标本体 ──────────────────────────────────────────────────────── */
.photoreal-toggle .pr-ico {
  position: relative;
  z-index: 2;
  transition: filter 300ms ease, color 160ms ease;
}
.photoreal-toggle[data-mode="on"] .pr-ico {
  color: var(--sig-select, #4a90e2);
  filter: drop-shadow(0 0 4px var(--sig-select, #4a90e2));
}
.photoreal-toggle[data-mode="on"].pr-justlit .pr-ico {
  animation: pr-core-flash 1100ms ease-out;
}
@keyframes pr-core-flash {
  0%   { filter: drop-shadow(0 0 0 transparent); }
  27%  { filter: drop-shadow(0 0 6px var(--sig-select)); }
  100% { filter: drop-shadow(0 0 4px var(--sig-select)); }
}

/* ── 层 A：棱镜扫光（图标内部 clip-path 内 135° 多色带） ────────── */
.photoreal-toggle .pr-prism {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(135deg,
    transparent 35%,
    var(--wl-405, #6a3df0) 45%,
    var(--wl-532, #3df04a) 50%,
    var(--wl-1064, #c01818) 55%,
    transparent 65%);
  background-size: 200% 200%;
  background-position: 100% 100%;
  /* sparkle 形状裁切——SVG path 同形 */
  clip-path: polygon(50% 3%, 57.5% 42.5%, 96.875% 50%, 57.5% 57.5%,
                    50% 96.875%, 42.5% 57.5%, 3% 50%, 42.5% 42.5%);
}
.photoreal-toggle.pr-justlit .pr-prism {
  animation: pr-prism-sweep 600ms ease-out;
}
@keyframes pr-prism-sweep {
  0%   { background-position: 100% 100%; opacity: 0; }
  20%  { opacity: 0.95; }
  100% { background-position: 0% 0%; opacity: 0; }
}
/* off 方向 = 反向 + 缩短 */
.photoreal-toggle.pr-justoff .pr-prism {
  animation: pr-prism-sweep-rev 400ms ease-out;
}
@keyframes pr-prism-sweep-rev {
  0%   { background-position: 0% 0%; opacity: 0; }
  30%  { opacity: 0.5; }
  100% { background-position: 100% 100%; opacity: 0; }
}

/* ── 层 B：双环 spectral bloom（外环 + 内环延迟 220ms）────────────── */
.photoreal-toggle .pr-glow {
  position: absolute;
  inset: -5px;
  z-index: -1;
  border-radius: 50%;
  background: var(--pr-spectral);
  filter: blur(7px) saturate(1.2);
  opacity: 0;
  pointer-events: none;
}
.photoreal-toggle:hover .pr-glow:not(.pr-glow-inner) {
  opacity: 0.16;
  transition: opacity 0.4s ease;
}
.photoreal-toggle.pr-justlit .pr-glow:not(.pr-glow-inner) {
  animation: pr-bloom-outer 1100ms ease-out;
}
.photoreal-toggle.pr-justlit .pr-glow-inner {
  animation: pr-bloom-inner 880ms 220ms ease-out;
}
.photoreal-toggle.pr-justoff .pr-glow:not(.pr-glow-inner) {
  animation: pr-bloom-fade 500ms ease-out;
}
@keyframes pr-bloom-outer {
  0%   { transform: scale(0.7);  opacity: 0; }
  25%  { opacity: 0.85; }
  100% { transform: scale(1.6);  opacity: 0; }
}
@keyframes pr-bloom-inner {
  0%   { transform: scale(0.78); opacity: 0; }
  30%  { opacity: 0.7; }
  100% { transform: scale(1.42); opacity: 0; }
}
@keyframes pr-bloom-fade {
  0%   { transform: scale(1);   opacity: 0.5; }
  100% { transform: scale(1.3); opacity: 0; }
}

/* ── inspector 入口角标（仅 dev-mode 显示，Task 9 启用）─────────── */
.photoreal-toggle .pr-inspector-trigger {
  display: none;
  position: absolute;
  right: 1px;
  bottom: 1px;
  width: 8px;
  height: 8px;
  font-size: 6px;
  line-height: 8px;
  border-radius: 50%;
  background: var(--overlay-2, rgba(0, 0, 0, 0.18));
  color: var(--ink-3, #71717a);
  text-align: center;
  font-style: italic;
  font-family: serif;
  pointer-events: auto;
}
body.dev-mode .photoreal-toggle .pr-inspector-trigger {
  display: inline-block;
}

/* ── reduced motion ────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .photoreal-toggle .pr-prism,
  .photoreal-toggle .pr-glow {
    animation: none !important;
  }
  .photoreal-toggle .pr-ico {
    transition: opacity 200ms ease;
  }
}

/* ── Photoreal 加载遮罩（白半透明盖画布 + 光谱进度条，v3.1.14）──────────── */
.pr-loading {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.74);   /* 白半透明挡住画布 */
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}
.pr-loading.is-visible {
  opacity: 1;
  pointer-events: auto;
}
.pr-loading-box {
  width: 220px;
  max-width: 60%;
  text-align: center;
}
.pr-loading-label {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-2, #3f3f46);
  margin-bottom: 10px;
}
.pr-loading-track {
  height: 4px;
  border-radius: 2px;
  background: var(--overlay-2, rgba(0, 0, 0, 0.10));
  overflow: hidden;
}
.pr-loading-bar {
  height: 100%;
  width: 0%;
  border-radius: 2px;
  /* 光谱色进度（与 photoreal 主题一致，token 驱动 + fallback）*/
  background: linear-gradient(90deg,
    var(--wl-405, #6b4cff), var(--wl-532, #3df04a), var(--wl-1064, #c01818));
  transition: width 200ms ease;
}
@media (prefers-reduced-motion: reduce) {
  .pr-loading { transition: none; }
  .pr-loading-bar { transition: none; }
}