/* ============ 作品展示层（view/） ============
   与主页同一套语言：近黑 / 暖白 / 克莱因蓝
   .chrome = 覆盖在作品之上的框架元素，闲置时整体淡出 */
:root {
  --bg: #0d0d0f;
  --ink: #eceae5;
  --ink-dim: #8b8983;
  --blue: #4d5dfa;
  --line-strong: #3a3a40;
  --font-sans: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

[hidden] { display: none !important; }

html { color-scheme: dark; }

body.viewer {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ============ 舞台 ============ */
#stage iframe {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  border: 0;
  background: var(--bg);
}

/* ============ 框架元素：闲置淡出 ============ */
.chrome {
  transition: opacity 0.7s ease;
}

body.is-idle .chrome {
  opacity: 0;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .chrome { transition: opacity 0.2s ease; }
  #stage iframe { transition: none !important; }
  .fx-band, .fx-slat { display: none !important; }
}

/* ============ 返回 / 退出 ============ */
.pill {
  position: fixed;
  top: 1.1rem;
  left: 1.1rem;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--line-strong);
  background: rgba(13, 13, 15, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.pill:hover { border-color: var(--ink-dim); }

.pill:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* 交互作品模式：退出方式贴边、更收敛 */
body.mode-interactive .pill {
  top: 0.8rem;
  left: auto;
  right: 0.8rem;
}

/* ============ 说明文字（左下） ============ */
.caption {
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 20;
  max-width: min(34rem, 88vw);
  padding: 3.5rem clamp(1.2rem, 4vw, 2.5rem) clamp(1.2rem, 4vh, 2rem);
  background: linear-gradient(to top right, rgba(13, 13, 15, 0.72), transparent 78%);
  pointer-events: none;
}

.caption h1 {
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.caption p {
  margin-top: 0.55rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--ink);
  opacity: 0.85;
}

.caption #cap-meta {
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
}

/* ============ 访问量 / 点赞 ============ */
.work-stats {
  margin-top: 0.9rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  pointer-events: auto;   /* caption 本体不拦截事件，这一行要能点 */
}

.stat-like {
  appearance: none;
  background: none;
  border: 1px solid var(--line-strong);
  color: var(--ink-dim);
  font: inherit;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.stat-like:hover:not(:disabled) { color: var(--ink); border-color: var(--ink-dim); }

.stat-like:disabled { color: var(--blue); cursor: default; }

.stat-like:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* 交互作品：统计贴在退出按钮下方的角落 */
.corner-stats {
  position: fixed;
  top: 3.4rem;
  right: 0.8rem;
  z-index: 30;
}

.corner-stats .work-stats {
  margin-top: 0;
  padding: 0.4rem 0.7rem;
  background: rgba(13, 13, 15, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--line-strong);
}

.corner-stats .stat-like { border: 0; padding: 0 0 0 0.4rem; }

/* ============ 轮播控制（右下） ============ */
.controls {
  position: fixed;
  right: 1.1rem;
  bottom: 1.1rem;
  z-index: 30;
  display: flex;
  gap: 0.4rem;
}

.ctrl-btn {
  appearance: none;
  cursor: pointer;
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  background: rgba(13, 13, 15, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--ink);
  font-size: 0.9rem;
}

.ctrl-btn:hover { border-color: var(--ink-dim); }

.ctrl-btn:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ============ 过场效果层 ============ */
#fx {
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
}

/* 过场 A：黑场淡入淡出（iframe 自身 opacity 过渡） */
.frame-fade {
  transition: opacity 0.9s ease;
}

/* 过场 B：克莱因蓝色带横扫 */
.fx-band {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 36vw;
  background: var(--blue);
  transform: translateX(-100%) skewX(-8deg) scaleX(1.2);
  animation: band-sweep 1s cubic-bezier(0.7, 0, 0.3, 1) forwards;
}

@keyframes band-sweep {
  to { transform: translateX(320%) skewX(-8deg) scaleX(1.2); }
}

/* 过场 C：百叶帘 */
.fx-slat {
  position: fixed;
  top: 0;
  bottom: 0;
  background: var(--bg);
  transform: scaleY(0);
  transform-origin: top;
}

.fx-slat.close {
  animation: slat-close 0.4s ease forwards;
}

.fx-slat.open {
  transform: scaleY(1);
  transform-origin: bottom;
  animation: slat-open 0.4s ease forwards;
}

@keyframes slat-close { to { transform: scaleY(1); } }
@keyframes slat-open { to { transform: scaleY(0); } }

/* ============ 错误状态 ============ */
.viewer-error {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
}