/* PPT 预览幻灯片样式 */

.ppt-preview-root {
  --ppt-bg: #141414;
  --ppt-text: #f5f5f5;
  --ppt-muted: #a0a0a0;
  --ppt-accent: #c9a962;
  --ppt-code-bg: #1e1e1e;
  --ppt-code-text: #eeeeee;
  --ppt-border: rgba(255, 255, 255, 0.1);
  --ppt-chrome-h: 8.5rem;
  --ppt-ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
  --ppt-duration-reveal: 0.95s;
  --ppt-duration-reveal-leave: 0.65s;
  --ppt-duration-slide: 0.85s;
  --ppt-duration-layout: 0.75s;
  --ppt-reveal-offset: 10px;
  --ppt-canvas-radius: 0.5rem;
}

/* 舞台与缩放容器 */
.ppt-stage {
  flex: 1;
  min-height: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 0.25rem 0;
  container-type: size;
  container-name: ppt-stage;
}

.ppt-slide-scaler {
  width: min(100cqw, calc(100cqh * 16 / 9));
  aspect-ratio: 16 / 9;
  max-height: 100cqh;
  position: relative;
  overflow: hidden;
}

/* 不支持 container query 时的回退 */
@supports not (width: 1cqw) {
  .ppt-slide-scaler {
    width: min(100%, calc((100dvh - var(--ppt-chrome-h)) * 16 / 9));
    max-height: calc(100dvh - var(--ppt-chrome-h));
  }
}

.ppt-slide-scaler .ppt-preview-root {
  width: 100%;
  height: 100%;
}

.ppt-slide-scaler .ppt-slide-canvas {
  aspect-ratio: auto;
  width: 100%;
  height: 100%;
}

.ppt-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  padding: 0.5rem;
  border-radius: 9999px;
  background: rgba(0, 0, 0, 0.4);
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.15s, background 0.15s;
}

.ppt-nav-btn:hover:not(:disabled) {
  color: #fff;
  background: rgba(0, 0, 0, 0.6);
}

.ppt-nav-btn:disabled {
  opacity: 0.2;
  cursor: not-allowed;
}

.ppt-nav-btn--prev {
  left: 0.75rem;
}

.ppt-nav-btn--next {
  right: 0.75rem;
}

.ppt-viewer--fullscreen .ppt-stage {
  padding: 0;
}

.ppt-viewer--fullscreen .ppt-slide-scaler {
  width: 100vw;
  height: 100dvh;
  max-width: none;
  max-height: none;
  aspect-ratio: auto;
}

.ppt-viewer--fullscreen .ppt-nav-btn {
  display: none;
}

.ppt-slide-canvas {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: 100%;
  background: var(--ppt-bg);
  color: var(--ppt-text);
  border: 1px solid var(--ppt-border);
  border-radius: var(--ppt-canvas-radius, 0.5rem);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 2.5vh, 2.5rem) clamp(1.25rem, 3vw, 2rem);
  box-sizing: border-box;
  position: relative;
  transition: padding var(--ppt-duration-layout) var(--ppt-ease-soft);
}

.ppt-viewer--fullscreen .ppt-slide-canvas {
  border: none;
  border-radius: 0;
}

.ppt-slide-canvas--title {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.ppt-slide-canvas--focus-title {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.ppt-slide-canvas--focus-title .ppt-slide-section-header {
  position: absolute;
  top: 50%;
  left: clamp(1.25rem, 3vw, 2rem);
  right: clamp(1.25rem, 3vw, 2rem);
  transform: translateY(-50%);
  margin-bottom: 0;
  flex: 0;
  text-align: center;
}

.ppt-slide-canvas--focus-title .ppt-slide-section-title {
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  text-align: center;
  margin-bottom: 0;
}

.ppt-slide-canvas--has-content {
  justify-content: flex-start;
}

.ppt-slide-section-header {
  flex-shrink: 0;
  margin-bottom: 1rem;
  transition:
    transform var(--ppt-duration-layout) var(--ppt-ease-soft),
    opacity var(--ppt-duration-layout) var(--ppt-ease-soft),
    margin var(--ppt-duration-layout) var(--ppt-ease-soft);
}

.ppt-slide-section-header--top {
  position: relative;
  top: auto;
  left: auto;
  right: auto;
  transform: none;
  text-align: left;
}

.ppt-slide-section-header--top .ppt-slide-section-title {
  font-size: clamp(1.125rem, 2.2vw, 1.75rem);
}

.ppt-slide-title-main {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1.5rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 1.5rem;
  color: var(--ppt-text);
}

.ppt-slide-title-meta {
  font-size: clamp(0.75rem, 1.5vw, 1rem);
  color: var(--ppt-muted);
  line-height: 1.8;
}

.ppt-slide-section-parent {
  font-size: clamp(0.7rem, 1.2vw, 0.875rem);
  font-weight: 500;
  color: var(--ppt-muted);
  margin: 0 0 0.25rem;
  line-height: 1.3;
}

.ppt-slide-section-title {
  font-size: clamp(1.125rem, 2.2vw, 1.75rem);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--ppt-text);
  transition: font-size var(--ppt-duration-layout) var(--ppt-ease-soft);
}

.ppt-slide-section-accent {
  width: 3rem;
  height: 0.2rem;
  background: var(--ppt-accent);
  border-radius: 9999px;
}

.ppt-slide-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow-y: auto;
  overflow-x: hidden;
}

.ppt-block-reveal {
  flex-shrink: 0;
}

.ppt-block-reveal--hero {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.ppt-block-h1 {
  font-size: clamp(1.15rem, 2.4vw, 1.625rem);
  font-weight: 700;
  color: var(--ppt-text);
  margin: 0;
  line-height: 1.3;
}

.ppt-block-h2 {
  font-size: clamp(1rem, 2vw, 1.375rem);
  font-weight: 700;
  color: var(--ppt-text);
  margin: 0;
  line-height: 1.35;
}

.ppt-block-h3 {
  font-size: clamp(0.95rem, 1.6vw, 1.125rem);
  font-weight: 600;
  color: var(--ppt-text);
  margin: 0;
}

.ppt-block-paragraph {
  font-size: clamp(0.8rem, 1.4vw, 1rem);
  line-height: 1.65;
  color: var(--ppt-text);
  margin: 0;
}

.ppt-block-image-wrap,
.ppt-block-video-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  max-height: 45%;
  flex-shrink: 0;
  pointer-events: auto;
}

.ppt-block-video-wrap {
  min-height: 3rem;
}

.ppt-block-image-wrap--hero,
.ppt-block-video-wrap--hero {
  flex: 1;
  max-height: none;
  width: 100%;
}

.ppt-block-image-wrap--hero .ppt-block-image,
.ppt-block-video-wrap--hero .ppt-block-video {
  max-height: 100%;
  height: 100%;
}

.ppt-thumbnail .ppt-block-image-wrap,
.ppt-thumbnail .ppt-block-video-wrap {
  max-height: 45%;
}

.ppt-block-image,
.ppt-block-video {
  max-width: 100%;
  max-height: 100%;
  width: 100%;
  object-fit: contain;
  border-radius: 0.375rem;
  background: #000;
  pointer-events: auto;
}

.ppt-block-image-fallback {
  font-size: 0.875rem;
  color: var(--ppt-muted);
  font-style: italic;
  text-align: center;
  padding: 1rem;
  border: 1px dashed var(--ppt-border);
  border-radius: 0.375rem;
}

.ppt-block-code {
  flex-shrink: 0;
  max-height: 40%;
  display: flex;
  flex-direction: column;
  border-radius: 0.5rem;
  overflow: hidden;
  background: var(--ppt-code-bg);
}

.ppt-block-code-label {
  padding: 0.35rem 0.75rem;
  font-size: 0.65rem;
  font-family: ui-monospace, monospace;
  color: rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ppt-block-code-content {
  margin: 0;
  padding: 0.75rem;
  font-size: clamp(0.65rem, 1.1vw, 0.8rem);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  color: var(--ppt-code-text);
  overflow: auto;
  white-space: pre;
  line-height: 1.5;
  flex: 1;
  min-height: 0;
}

.ppt-block-list {
  margin: 0;
  padding-left: 1.25rem;
  font-size: clamp(0.8rem, 1.4vw, 1rem);
  line-height: 1.6;
  color: var(--ppt-text);
}

.ppt-block-list--ordered {
  list-style-type: decimal;
}

.ppt-block-placeholder {
  font-size: 0.875rem;
  color: var(--ppt-muted);
  font-style: italic;
  margin: 0;
}

/* 内容块揭示动画 */
.ppt-reveal-enter-active {
  transition:
    opacity var(--ppt-duration-reveal) var(--ppt-ease-soft),
    transform var(--ppt-duration-reveal) var(--ppt-ease-soft);
}

.ppt-reveal-leave-active {
  transition:
    opacity var(--ppt-duration-reveal-leave) var(--ppt-ease-soft),
    transform var(--ppt-duration-reveal-leave) var(--ppt-ease-soft);
}

.ppt-reveal-enter-from {
  opacity: 0;
  transform: translateY(var(--ppt-reveal-offset));
}

.ppt-reveal-leave-to {
  opacity: 0;
  transform: translateY(calc(var(--ppt-reveal-offset) * -0.67));
}

/* 幻灯片切换动画（crossfade 重叠） */
.ppt-slide-enter-active,
.ppt-slide-leave-active,
.ppt-slide-back-enter-active,
.ppt-slide-back-leave-active {
  transition:
    opacity var(--ppt-duration-slide) var(--ppt-ease-soft),
    transform var(--ppt-duration-slide) var(--ppt-ease-soft);
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.ppt-slide-leave-active,
.ppt-slide-back-leave-active {
  z-index: 1;
}

.ppt-slide-enter-active,
.ppt-slide-back-enter-active {
  z-index: 2;
}

.ppt-slide-enter-from {
  opacity: 0;
  transform: translateX(8px) scale(0.985);
}

.ppt-slide-leave-to {
  opacity: 0;
  transform: translateX(-8px) scale(0.985);
}

.ppt-slide-back-enter-from {
  opacity: 0;
  transform: translateX(-8px) scale(0.985);
}

.ppt-slide-back-leave-to {
  opacity: 0;
  transform: translateX(8px) scale(0.985);
}

/* 页间切换：纯淡入淡出 */
.ppt-slide-fade-enter-active,
.ppt-slide-fade-leave-active,
.ppt-slide-back-fade-enter-active,
.ppt-slide-back-fade-leave-active {
  transition: opacity var(--ppt-duration-slide) var(--ppt-ease-soft);
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.ppt-slide-fade-leave-active,
.ppt-slide-back-fade-leave-active {
  z-index: 1;
}

.ppt-slide-fade-enter-active,
.ppt-slide-back-fade-enter-active {
  z-index: 2;
}

.ppt-slide-fade-enter-from,
.ppt-slide-fade-leave-to,
.ppt-slide-back-fade-enter-from,
.ppt-slide-back-fade-leave-to {
  opacity: 0;
}

/* 页间切换：推入（更明显位移） */
.ppt-slide-push-enter-active,
.ppt-slide-push-leave-active,
.ppt-slide-back-push-enter-active,
.ppt-slide-back-push-leave-active {
  transition:
    opacity var(--ppt-duration-slide) var(--ppt-ease-soft),
    transform var(--ppt-duration-slide) var(--ppt-ease-soft);
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.ppt-slide-push-leave-active,
.ppt-slide-back-push-leave-active {
  z-index: 1;
}

.ppt-slide-push-enter-active,
.ppt-slide-back-push-enter-active {
  z-index: 2;
}

.ppt-slide-push-enter-from {
  opacity: 0;
  transform: translateX(24px) scale(0.98);
}

.ppt-slide-push-leave-to {
  opacity: 0;
  transform: translateX(-24px) scale(0.98);
}

.ppt-slide-back-push-enter-from {
  opacity: 0;
  transform: translateX(-24px) scale(0.98);
}

.ppt-slide-back-push-leave-to {
  opacity: 0;
  transform: translateX(24px) scale(0.98);
}

/* 分步揭示：纯淡入 */
.ppt-reveal-fade-enter-active {
  transition: opacity var(--ppt-duration-reveal) var(--ppt-ease-soft);
}

.ppt-reveal-fade-leave-active {
  transition: opacity var(--ppt-duration-reveal-leave) var(--ppt-ease-soft);
}

.ppt-reveal-fade-enter-from,
.ppt-reveal-fade-leave-to {
  opacity: 0;
}

.ppt-thumbnail {
  aspect-ratio: 16 / 9;
  width: 7rem;
  flex-shrink: 0;
  border-radius: 0.375rem;
  overflow: hidden;
  border: 2px solid transparent;
  cursor: pointer;
  opacity: 0.65;
  transition: opacity 0.15s, border-color 0.15s;
  background: var(--ppt-bg);
}

.ppt-thumbnail:hover {
  opacity: 0.9;
}

.ppt-thumbnail--active {
  opacity: 1;
  border-color: var(--ppt-accent);
}

.ppt-thumbnail-inner {
  transform: scale(0.18);
  transform-origin: top left;
  width: 555%;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .ppt-reveal-enter-active,
  .ppt-reveal-leave-active,
  .ppt-reveal-fade-enter-active,
  .ppt-reveal-fade-leave-active,
  .ppt-slide-enter-active,
  .ppt-slide-leave-active,
  .ppt-slide-back-enter-active,
  .ppt-slide-back-leave-active,
  .ppt-slide-fade-enter-active,
  .ppt-slide-fade-leave-active,
  .ppt-slide-back-fade-enter-active,
  .ppt-slide-back-fade-leave-active,
  .ppt-slide-push-enter-active,
  .ppt-slide-push-leave-active,
  .ppt-slide-back-push-enter-active,
  .ppt-slide-back-push-leave-active,
  .ppt-slide-section-header,
  .ppt-slide-section-title,
  .ppt-slide-canvas {
    transition-duration: 0.01ms !important;
  }

  .ppt-reveal-enter-from,
  .ppt-reveal-leave-to,
  .ppt-reveal-fade-enter-from,
  .ppt-reveal-fade-leave-to,
  .ppt-slide-enter-from,
  .ppt-slide-leave-to,
  .ppt-slide-back-enter-from,
  .ppt-slide-back-leave-to,
  .ppt-slide-fade-enter-from,
  .ppt-slide-fade-leave-to,
  .ppt-slide-back-fade-enter-from,
  .ppt-slide-back-fade-leave-to,
  .ppt-slide-push-enter-from,
  .ppt-slide-push-leave-to,
  .ppt-slide-back-push-enter-from,
  .ppt-slide-back-push-leave-to {
    transform: none;
  }
}

@media (max-width: 768px) {
  .ppt-stage {
    padding: 0.25rem 0;
  }

  .ppt-slide-canvas {
    padding: 1rem 1.25rem;
  }

  .ppt-slide-canvas--focus-title .ppt-slide-section-header {
    left: 1.25rem;
    right: 1.25rem;
  }

  .ppt-thumbnail {
    width: 5rem;
  }
}
