body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #050608;
  color: #f6f5f4;
}

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  padding: 24px;
  background: #0f1117;
  border-right: 1px solid rgba(255,255,255,0.05);
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  overflow-y: auto;
}

.sidebar h1 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.sidebar nav a {
  display: block;
  padding: 6px 0;
  font-size: 0.9rem;
  color: #c7c9d3;
  text-decoration: none;
}

.sidebar nav a:hover {
  color: #ffffff;
}

.content {
  flex: 1;
  padding: 32px 40px;
  max-width: 960px;
}

.content h1, .content h2, .content h3 {
  color: #ffffff;
}

.content img {
  max-width: 100%;
  border-radius: 12px;
  margin: 12px 0;
}

.content code {
  background: rgba(255,255,255,0.06);
  padding: 2px 4px;
  border-radius: 4px;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.content pre {
  background: rgba(255,255,255,0.06);
  padding: 12px 16px;
  border-radius: 10px;
  overflow-x: auto;
}
/* --- Public Help Center (Book VI) --- */
.hc-top {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(5,6,8,.88);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.hc-top-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.hc-brand {
    color: #fff;
    text-decoration: none;
    font-weight: 800;
    letter-spacing: .2px;
}

.hc-nav a {
    color: rgba(255,255,255,.8);
    text-decoration: none;
    margin-left: 12px;
    font-weight: 600;
    font-size: 14px;
}

    .hc-nav a.active {
        color: #fff;
        text-decoration: underline;
        text-underline-offset: 6px;
    }

.hc-wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding: 26px 16px 56px;
}

.hc-hero h1 {
    margin: 10px 0 6px;
    font-size: 40px;
}

.muted {
    opacity: .78;
}

.hc-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.hc-card {
    display: block;
    padding: 16px;
    border-radius: 16px;
    text-decoration: none;
    color: #fff;
    border: 1px solid rgba(255,255,255,.10);
    background: rgba(255,255,255,.04);
}

    .hc-card:hover {
        border-color: rgba(255,255,255,.18);
        background: rgba(255,255,255,.06);
    }

    .hc-card h2 {
        margin: 0 0 6px;
        font-size: 18px;
    }

    .hc-card p {
        margin: 0;
        opacity: .82;
        line-height: 1.35;
    }

.hc-section {
    margin-top: 32px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.10);
}

.hc-faq details {
    border: 1px solid rgba(255,255,255,.10);
    background: rgba(255,255,255,.03);
    border-radius: 14px;
    padding: 12px 14px;
    margin: 10px 0;
}

.hc-faq summary {
    cursor: pointer;
    font-weight: 700;
}

.hc-foot {
    margin-top: 40px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.10);
}

.hc-article {
    max-width: 820px;
    margin: 0 auto;
    padding: 28px 16px 56px;
    color: #fff;
}

    .hc-article h1 {
        font-size: 38px;
        margin: 10px 0 6px;
    }

    .hc-article h2 {
        margin-top: 26px;
    }

    .hc-article ol {
        line-height: 1.6;
    }

.callout {
    border-radius: 14px;
    padding: 12px 14px;
    margin: 14px 0;
    border: 1px solid rgba(255,255,255,.10);
    background: rgba(255,255,255,.04);
}

    .callout.important {
        border-color: rgba(212,175,55,.35);
        background: rgba(212,175,55,.10);
    }

.shot {
    margin: 14px 0;
    border: 1px solid rgba(255,255,255,.10);
    border-radius: 16px;
    overflow: hidden;
    background: rgba(255,255,255,.03);
}

    .shot img {
        width: 100%;
        display: block;
    }

    .shot figcaption {
        padding: 10px 12px;
        font-size: 13px;
        opacity: .8;
    }

.hc-next {
    margin-top: 26px;
}

.hc-btn {
    display: inline-block;
    padding: 12px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.14);
    text-decoration: none;
    color: #fff;
    font-weight: 800;
}

    .hc-btn:hover {
        background: rgba(255,255,255,.06);
    }