:root {
  --color-BasicBg: #181a20;
  --color-SecondaryBg: #0b0e11;
  --color-CardBg: #202630;
  --color-Vessel: #2b3139;
  --color-Line: #2b3139;
  --color-PrimaryText: #eaecef;
  --color-SecondaryText: #848e9c;
  --color-TertiaryText: #707a8a;
  --color-PrimaryYellow: #f0b90b;
  --color-BtnBg: #fcd535;
  --color-TextOnYellow: #202630;
  --color-TextLink: #f0b90b;
  --color-Beginner: #2ebd85;
  --wm-toolbar-height: 284px;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--color-BasicBg);
  color: var(--color-PrimaryText);
  font-family: "IBM Plex Sans", "Binance Plex", Arial, Helvetica, sans-serif;
}

#playback {
  background: var(--color-BasicBg);
  min-height: 70vh;
  padding-top: var(--wm-toolbar-height, 284px);
}

a {
  color: var(--color-TextLink);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.ac-header {
  position: sticky;
  top: var(--wm-toolbar-height, 284px);
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
  padding: 0 24px;
  background: var(--color-BasicBg);
  border-bottom: 1px solid var(--color-Line);
}

.ac-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-PrimaryText);
  font-weight: 600;
  font-size: 18px;
  text-decoration: none;
}

.ac-brand:hover {
  text-decoration: none;
}

.ac-nav {
  display: none;
  align-items: center;
  gap: 22px;
  color: var(--color-SecondaryText);
  font-size: 14px;
}

.ac-nav a {
  color: var(--color-SecondaryText);
  text-decoration: none;
}

.ac-nav a:hover,
.ac-nav a.is-on {
  color: var(--color-PrimaryText);
}

.ac-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ac-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 14px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.ac-btn:hover {
  text-decoration: none;
}

.ac-btn-ghost {
  color: var(--color-PrimaryText);
}

.ac-btn-yellow {
  background: var(--color-BtnBg);
  color: var(--color-TextOnYellow);
}

.ac-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}

.ac-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--color-SecondaryText);
  font-size: 14px;
  margin-bottom: 28px;
}

.ac-crumbs a {
  color: var(--color-SecondaryText);
}

.ac-crumbs a:hover {
  color: var(--color-PrimaryText);
}

.ac-sep {
  color: var(--color-TertiaryText);
}

.ac-title {
  margin: 0 0 12px;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.ac-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 32px;
  color: var(--color-SecondaryText);
  font-size: 14px;
}

.ac-level {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-Beginner);
  font-weight: 500;
}

.ac-level::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-Beginner);
}

.ac-article h2 {
  margin: 36px 0 14px;
  font-size: 24px;
  font-weight: 600;
}

.ac-article p,
.ac-article li {
  color: var(--color-PrimaryText);
  font-size: 16px;
  line-height: 1.7;
}

.ac-article p {
  margin: 0 0 16px;
}

.ac-article ul {
  margin: 0 0 16px;
  padding-left: 1.2rem;
}

.ac-article li {
  margin: 0 0 12px;
}

.ac-article strong {
  font-weight: 600;
}

.talk-card {
  margin: 40px 0 28px;
  padding: 24px 24px 20px;
  border: 1px solid var(--color-Line);
  border-radius: 12px;
  background: var(--color-CardBg);
}

.talk-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-bottom: 18px;
}

.talk-figure {
  width: 132px;
  height: 132px;
  flex: 0 0 132px;
  border-radius: 8px;
  background: #f7f4ea;
  overflow: hidden;
}

.talk-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform-origin: 50% 80%;
}

.talk-intro {
  flex: 1 1 220px;
  min-width: 0;
}

.talk-kicker {
  margin: 0 0 4px;
  color: var(--color-PrimaryYellow);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.talk-intro h2 {
  margin: 0 0 8px;
}

.talk-intro p {
  margin: 0 0 14px;
  color: var(--color-SecondaryText);
}

.talk-q {
  margin: 18px 0 6px;
  color: var(--color-SecondaryText);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.talk-a {
  margin: 0 0 8px;
}

.ac-footer {
  border-top: 1px solid var(--color-Line);
  padding: 28px 20px 48px;
  color: var(--color-TertiaryText);
  font-size: 12px;
  line-height: 1.6;
  max-width: 860px;
  margin: 0 auto;
}

@media (min-width: 900px) {
  .ac-nav {
    display: flex;
  }
}