/* Trang hướng dẫn sử dụng (/doc/): menu chức năng bên trái, nội dung chi tiết bên phải. Dùng biến màu của style.css */
body.doc { overflow: auto; display: block; height: auto; }
.doc-top { position: sticky; top: 0; z-index: 10; }
.doc-top .top-link { color: var(--on-primary); text-decoration: none; margin-left: auto; opacity: 0.9; }
.doc-menu-btn { display: none; margin-left: auto; background: transparent; border: 1px solid rgba(255, 230, 170, 0.6); color: var(--on-primary); border-radius: 6px; padding: 4px 10px; cursor: pointer; }

.doc-layout { display: grid; grid-template-columns: 290px minmax(0, 1fr); max-width: 1240px; margin: 0 auto; min-height: calc(100vh - 64px); }
.doc-nav { position: sticky; top: 64px; align-self: start; max-height: calc(100vh - 64px); overflow-y: auto; padding: 18px 12px 30px 16px; border-right: 1px solid var(--gold-soft); background: var(--paper-2); }
.doc-search { width: 100%; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--field-line); background: var(--field); margin-bottom: 12px; }
.doc-nav h4 { margin: 14px 0 4px; font-family: var(--serif); font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--muted); }
.doc-nav ul { list-style: none; margin: 0; padding: 0; }
.doc-nav a { display: block; padding: 5px 10px; border-radius: 7px; color: var(--ink); text-decoration: none; font-size: 14px; line-height: 1.35; }
.doc-nav a:hover { background: var(--card); }
.doc-nav a.active { background: var(--red); color: var(--on-primary); }
.doc-nav .no-result { font-size: 13px; color: var(--muted); padding: 6px 10px; }

.doc-main { padding: 26px 34px 80px; line-height: 1.65; min-width: 0; }
.doc-main section { background: var(--card); border: 1px solid var(--gold-soft); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 24px; margin-bottom: 20px; scroll-margin-top: 80px; }
.doc-main h1 { margin: 0 0 6px; font-size: 30px; }
.doc-main h2 { margin: 0 0 10px; font-size: 22px; border-bottom: 1px solid var(--gold-soft); padding-bottom: 6px; }
.doc-main h3 { margin: 18px 0 6px; font-size: 17px; }
.doc-main p, .doc-main li { max-width: 820px; }
.doc-main ol, .doc-main ul { padding-left: 22px; }
.doc-main li { margin: 3px 0; }
.doc-main code { background: var(--paper-2); padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.doc-main .path { display: inline-block; background: var(--paper-2); border: 1px solid var(--gold-soft); border-radius: 6px; padding: 0 7px; font-size: 13px; }
.doc-main table { border-collapse: collapse; width: 100%; max-width: 820px; margin: 8px 0; font-size: 14px; }
.doc-main th, .doc-main td { border: 1px solid var(--gold-soft); padding: 6px 9px; text-align: left; vertical-align: top; }
.doc-main th { background: var(--paper-2); font-family: var(--serif); }
.doc-tip { border-left: 4px solid var(--gold); background: var(--paper-2); padding: 8px 12px; border-radius: 0 8px 8px 0; margin: 10px 0; max-width: 800px; }
.doc-warn { border-left-color: var(--red); }
.doc-lead { font-size: 16px; color: var(--muted); }
.doc-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; margin-top: 12px; }
.doc-cards a { display: block; padding: 10px 12px; border: 1px solid var(--gold-soft); border-radius: 9px; background: var(--paper); color: var(--ink); text-decoration: none; }
.doc-cards a b { display: block; color: var(--red-dark); font-family: var(--serif); }
.doc-cards a span { font-size: 13px; color: var(--muted); }
.doc-foot { text-align: center; color: var(--muted); font-size: 13px; padding: 20px; }
.doc-hidden { display: none !important; }

@media (max-width: 860px) {
  .doc-menu-btn { display: inline-block; }
  .doc-top .top-link { display: none; }
  .doc-layout { grid-template-columns: 1fr; }
  .doc-nav { display: none; position: fixed; inset: 58px 0 0 0; max-height: none; z-index: 9; border-right: 0; }
  body.doc-nav-open .doc-nav { display: block; }
  .doc-main { padding: 16px 14px 60px; }
  .doc-main section { padding: 14px 16px; }
}

/* Ảnh minh hoạ, đường dẫn, lời kêu gọi */
.doc-fig { margin: 14px 0 16px; max-width: 900px; }
.doc-fig img { display: block; width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--gold-soft); box-shadow: var(--shadow); background: var(--paper-2); }
.doc-fig figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; text-align: center; }
.doc-fig-side { float: right; width: min(300px, 45%); margin: 4px 0 12px 20px; }
.doc-fig-row { display: flex; gap: 18px; flex-wrap: wrap; }
.doc-fig-row .doc-fig { width: min(280px, 100%); margin: 8px 0; }
.doc-main section::after { content: ''; display: block; clear: both; }
.doc-crumb { font-size: 13px; color: var(--muted); margin: 0 0 10px; }
.doc-crumb a { color: var(--muted); }
.doc-meta { color: var(--muted); font-size: 13px; margin: 0 0 10px; }
.doc-nav-more { margin: 16px 10px 0; font-size: 14px; }
.doc-nav-more a { font-weight: 600; }
.doc-cta { text-align: center; background: linear-gradient(180deg, var(--card), var(--paper-2)) !important; }
.doc-cta p { margin-left: auto; margin-right: auto; }
.doc-cta .btn { margin: 4px; }
@media (max-width: 860px) {
  .doc-fig-side { float: none; width: 100%; max-width: 360px; margin: 10px auto; }
}