/* ============ Tutorial page ============ */

/* ---- Page hero ---- */
.tut-hero { padding: 76px 0 40px; text-align: center; }
.tut-hero h1 {
  font-size: clamp(30px, 4.4vw, 50px); font-weight: 900; line-height: 1.25; letter-spacing: 1px;
}
.tut-hero h1 .hl {
  background: linear-gradient(100deg, var(--orange) 10%, #e8590c 55%, var(--teal) 110%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tut-sub { color: var(--text-dim); font-size: 16px; max-width: 560px; margin: 18px auto 0; }
.tut-meta {
  margin-top: 22px; display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 13px; color: var(--text-dim);
}
.tut-meta span { display: flex; align-items: center; gap: 7px; }
.tut-meta i { color: var(--teal); }

/* ---- Doc layout: sticky TOC + article ---- */
.tut-wrap { padding: 20px 0 60px; }
.tut-layout {
  display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 48px; align-items: start;
}

.tut-toc {
  position: sticky; top: 92px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 18px;
  padding: 20px; box-shadow: var(--shadow-soft);
}
.toc-title {
  font-size: 13px; font-weight: 700; letter-spacing: 1px; color: var(--text);
  display: flex; align-items: center; gap: 8px; margin-bottom: 12px;
}
.toc-title i { color: var(--orange); }
.tut-toc nav { display: grid; }
.tut-toc nav a {
  font-size: 13.5px; color: var(--text-dim); padding: 7px 10px; border-radius: 8px;
  border-left: 2px solid transparent; transition: all .2s;
}
.tut-toc nav a:hover { color: var(--text); background: rgba(20, 45, 85, 0.05); }
.tut-toc nav a.active {
  color: var(--orange); border-left-color: var(--orange); background: var(--orange-soft);
  font-weight: 700;
}
.toc-dl {
  margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line);
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--teal); font-weight: 500;
}
.toc-dl:hover { text-decoration: underline; }

/* ---- Article sections ---- */
.tut-body { min-width: 0; }
.tut-sec {
  background: var(--panel); border: 1px solid var(--line); border-radius: 22px;
  box-shadow: var(--shadow-soft); padding: 34px 38px; margin-bottom: 26px;
  scroll-margin-top: 90px;
}
.tut-sec h2 {
  display: flex; align-items: center; gap: 14px;
  font-size: 22px; font-weight: 900; margin-bottom: 18px;
}
.sec-dot {
  flex: none; width: 12px; height: 12px; border-radius: 4px;
  background: linear-gradient(120deg, #f9820f, #ea6209);
}
.step-num {
  flex: none; width: 38px; height: 38px; border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(120deg, #f9820f, #ea6209); color: #fff;
  font-family: var(--mono); font-size: 17px; font-weight: 700;
  box-shadow: 0 8px 18px rgba(240, 118, 10, 0.3);
}
.tut-sec > p { color: var(--text-dim); font-size: 15px; margin-bottom: 14px; }
.tut-sec > p:last-child { margin-bottom: 0; }
.tut-h3 {
  font-size: 16.5px; font-weight: 700; margin: 26px 0 10px;
  display: flex; align-items: center; gap: 8px;
}
.tut-h3::before {
  content: ""; width: 4px; height: 16px; border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), var(--teal));
}
.tut-sec p b, .tut-sec li b { color: var(--text); }
.tut-sec a { color: var(--teal); font-weight: 500; }
.tut-sec a:hover { text-decoration: underline; }
.tut-sec code {
  font-family: var(--mono); font-size: 13px; background: rgba(20, 45, 85, 0.07);
  padding: 1px 7px; border-radius: 5px; overflow-wrap: anywhere;
}

/* Figure image */
.tut-fig {
  border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  margin-bottom: 20px; background: #fdfdfe;
}
.tut-fig img { width: 100%; max-height: 300px; object-fit: cover; display: block; }

/* Checklist */
.check-list { display: grid; gap: 14px; margin: 6px 0 16px; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; }
.check-list li > i { color: var(--teal); margin-top: 5px; flex: none; }
.check-list b { display: block; font-size: 15.5px; }
.check-list span { color: var(--text-dim); font-size: 14px; }

/* Numbered list */
.num-list { margin: 0 0 16px 2px; padding-left: 22px; display: grid; gap: 8px; }
.num-list li { color: var(--text-dim); font-size: 14.5px; }
.num-list li::marker { color: var(--orange); font-weight: 700; font-family: var(--mono); }

/* Per-platform install steps */
.plat-steps { display: grid; gap: 12px; margin-top: 6px; }
.plat-steps li {
  display: flex; gap: 14px; align-items: flex-start;
  background: rgba(20, 45, 85, 0.03); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px;
}
.plat-steps li > i { font-size: 20px; color: var(--orange); margin-top: 3px; flex: none; width: 24px; text-align: center; }
.plat-steps li div { color: var(--text-dim); font-size: 14px; }

/* Callouts */
.callout {
  display: flex; gap: 12px; align-items: flex-start;
  border-radius: 14px; padding: 14px 18px; margin: 4px 0 16px;
  font-size: 14px;
}
.callout p { color: var(--text-dim); margin: 0; }
.callout i { margin-top: 4px; flex: none; }
.callout-warn { background: rgba(202, 138, 4, 0.08); border: 1px solid rgba(202, 138, 4, 0.3); }
.callout-warn i { color: #ca8a04; }
.callout-ok { background: var(--teal-soft); border: 1px solid rgba(13, 148, 136, 0.3); }
.callout-ok i { color: var(--teal); }

/* Proxy mode cards */
.mode-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 6px 0 18px; }
.mode-card {
  border: 1px solid var(--line); border-radius: 14px; padding: 18px;
  background: rgba(20, 45, 85, 0.03);
}
.mode-card.mode-reco { border-color: rgba(240, 118, 10, 0.45); background: var(--orange-soft); }
.mode-head {
  display: flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 700; margin-bottom: 8px;
}
.mode-head i { color: var(--orange); }
.mode-card p { color: var(--text-dim); font-size: 13.5px; margin: 0; }
.mode-card .tag {
  font-family: var(--mono); font-size: 10.5px; padding: 2px 8px; border-radius: 5px;
}
.tag-hot { color: #fff; background: linear-gradient(120deg, #f9820f, #ea6209); }

/* Code panel spacing inside article (base styles come from style.css) */
.tut-sec .code-panel { margin: 6px 0 4px; }

/* FAQ accordion */
.faq-item {
  border: 1px solid var(--line); border-radius: 14px;
  background: rgba(20, 45, 85, 0.02); margin-bottom: 10px; overflow: hidden;
}
.faq-item summary {
  cursor: pointer; list-style: none; padding: 15px 18px;
  font-size: 15px; font-weight: 700; position: relative;
  display: flex; align-items: center; gap: 10px;
}
.faq-item summary::before {
  content: "Q"; flex: none;
  width: 24px; height: 24px; border-radius: 8px; display: grid; place-items: center;
  background: var(--orange-soft); color: var(--orange);
  font-family: var(--mono); font-size: 12px; font-weight: 700;
}
.faq-item summary::after {
  content: "\f078"; font-family: "Font Awesome 6 Free"; font-weight: 900;
  margin-left: auto; font-size: 11px; color: var(--text-dim); transition: transform .25s;
}
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item[open] { border-color: rgba(240, 118, 10, 0.4); background: #fff; }
.faq-item p {
  padding: 0 18px 16px 52px; color: var(--text-dim); font-size: 14px; margin: 0;
}

/* Glossary */
.glossary-list { display: grid; gap: 12px; margin-top: 6px; }
.glossary-list > div {
  display: grid; grid-template-columns: 130px 1fr; gap: 16px;
  padding: 12px 16px; border-radius: 12px; background: rgba(20, 45, 85, 0.03);
  border: 1px solid var(--line);
}
.glossary-list dt { font-weight: 700; font-size: 14.5px; color: var(--orange); }
.glossary-list dd { color: var(--text-dim); font-size: 14px; margin: 0; }

/* Next-step reading cards */
.next-grid { display: grid; gap: 12px; margin-top: 6px; }
.next-card {
  display: flex; align-items: center; gap: 16px;
  border: 1px solid var(--line); border-radius: 14px; padding: 12px 18px 12px 12px;
  background: rgba(20, 45, 85, 0.03);
  transition: border-color .2s, background .2s, transform .2s;
}
.next-card:hover { border-color: rgba(13, 148, 136, 0.45); background: #fff; transform: translateX(4px); text-decoration: none !important; }
.next-card-icon {
  width: 52px; height: 52px; border-radius: 14px; flex: none;
  display: grid; place-items: center; color: #fff; font-size: 19px;
  background: linear-gradient(120deg, #f9820f, #ea6209);
  box-shadow: 0 10px 20px rgba(240, 118, 10, 0.28);
}
.next-card-icon.tone-teal {
  background: linear-gradient(120deg, #14b8a6, #0d9488);
  box-shadow: 0 10px 20px rgba(13, 148, 136, 0.26);
}
.next-card b { display: block; font-size: 15px; color: var(--text); }
.next-card span { color: var(--text-dim); font-size: 13px; }
.next-card > i { margin-left: auto; color: var(--teal); font-size: 13px; }

/* ---- Bottom CTA ---- */
.tut-cta { padding: 10px 0 90px; }
.tut-cta-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap;
  border: 1px solid var(--line); border-radius: 24px; padding: 44px 48px;
  background:
    radial-gradient(500px 260px at 92% 15%, rgba(240, 118, 10, 0.1), transparent 65%),
    radial-gradient(400px 240px at 4% 90%, rgba(13, 148, 136, 0.08), transparent 65%),
    var(--panel);
  box-shadow: var(--shadow-soft);
}
.tut-cta-inner h2 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 900; }
.tut-cta-inner p { color: var(--text-dim); margin-top: 8px; font-size: 15px; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .tut-layout { grid-template-columns: 1fr; gap: 26px; }
  .tut-toc { position: static; }
  .mode-grid { grid-template-columns: 1fr; }
  .tut-sec { padding: 26px 22px; }
  .faq-item p { padding-left: 18px; }
  .tut-cta-inner { padding: 34px 26px; }
  .glossary-list > div { grid-template-columns: 1fr; gap: 4px; }
}