/* ==========================================================================
   「怎么用」页：手绘动画播放器 + 五个步骤（步骤兼作章节按钮）
   画布里的颜色由 assets/js/guide-film.js 按网站主题决定；这里只管外框与控件。
   ========================================================================== */

.film {
  margin: 0;
}

.film-canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 14px;
  cursor: pointer;
}

.film-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 14px;
}

.film-play {
  flex: none;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: var(--on-accent);
  cursor: pointer;
  transition: background-color 0.18s ease;
}

.film-play:hover {
  background: var(--accent-hover);
}

.film-icon {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.film-play[data-playing="true"] .film-icon--play,
.film-play[data-playing="false"] .film-icon--pause {
  display: none;
}

/* 细线进度条：整条都能点、能拖，键盘左右键每次 5 秒 */
.film-track {
  position: relative;
  flex: 1;
  height: 22px;
  cursor: pointer;
  touch-action: none;
}

.film-track::before,
.film-fill {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  height: 3px;
  border-radius: 3px;
  transform: translateY(-50%);
}

.film-track::before {
  right: 0;
  background: var(--line-strong);
}

.film-fill {
  width: 0;
  background: var(--accent);
}

.film-fill::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--accent);
  transform: translateY(-50%);
}

.film-time {
  flex: none;
  min-width: 84px;
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 12.5px;
  text-align: right;
}

.steps {
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.step {
  border-bottom: 1px solid var(--line);
}

.step[id] {
  scroll-margin-top: 80px;
}

.step-jump {
  display: grid;
  grid-template-columns: 36px 1fr;
  align-items: start;
  gap: 16px;
  width: 100%;
  padding: 18px 2px;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.18s ease;
}

.step-jump:hover {
  background: var(--row-hover);
}

.step-no {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-top: 1px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--fg-dim);
  font-family: var(--mono);
  font-size: 13px;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.step-body {
  display: grid;
  gap: 4px;
}

.step-name {
  font-size: 16px;
  font-weight: 600;
}

.step-text {
  color: var(--fg-muted);
  font-size: 14.5px;
}

/* 正在播放的那一步 */
.step-jump[aria-current="true"] .step-no {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.step-jump[aria-current="true"] .step-name,
.step-jump:hover .step-name {
  color: var(--accent);
}

@media (max-width: 560px) {
  .film-bar {
    gap: 10px;
  }

  .film-time {
    min-width: 0;
    font-size: 11.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .film-play,
  .step-jump,
  .step-no {
    transition: none;
  }
}