/* ============================================================
   DiagMyPCHub — tutorial: "My monitor shows no signal"
   Local stylesheet. All rules are scoped to the mns-* classes
   below and share the site's design tokens (defined in the
   root stylesheet). Shared components used here — .wrap,
   .topbar, .site-header/nav, .breadcrumbs, .btn, .sec-kicker,
   .table-wrap, .callout, .ad-wrap/.ad-slot (auto-hidden by
   the root script), .toast, .to-top, .consent, .site-footer —
   are intentionally NOT redefined.
   ============================================================ */

/* ---------- Reading progress ---------- */
.mns-progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 60; pointer-events: none; }
.mns-progress span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--blue), var(--cyan)); }

/* ---------- Layout: sticky TOC + article ---------- */
.mns-grid { display: grid; gap: 32px; padding: 34px 0 10px; align-items: start; }
.mns-toc { display: none; }
.mns-toc-title { font: 600 0.7rem var(--font-mono); text-transform: uppercase; letter-spacing: 0.14em; color: var(--ink-3); margin: 0 0 10px; }
.mns-toc ul { border-left: 2px solid var(--line); }
.mns-toc a { display: block; padding: 6px 0 6px 14px; margin-left: -2px; border-left: 2px solid transparent; font-size: 0.84rem; color: var(--ink-2); text-decoration: none; transition: color 0.2s, border-color 0.2s; }
.mns-toc a:hover { color: var(--ink); }
.mns-toc a.is-active { color: var(--blue); border-left-color: var(--blue); font-weight: 600; }

/* ---------- Head ---------- */
.mns-head { margin-bottom: 26px; }
.mns-head h1 { font-size: clamp(1.9rem, 1.2rem + 2.6vw, 2.6rem); font-weight: 700; letter-spacing: -0.02em; margin: 0 0 14px; }
.mns-intro { font-size: 1.02rem; color: var(--ink-2); max-width: 74ch; }

/* ---------- Optional hero image (hidden until an image exists) ---------- */
.mns-figure { margin: 0 0 30px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.mns-figure img { display: block; width: 100%; height: auto; }
.mns-figure figcaption { font-size: 0.8rem; color: var(--ink-3); padding: 10px 16px; border-top: 1px solid var(--line); }
.mns-figure[data-empty="true"] { display: none; }

/* ---------- Situation picks ---------- */
.mns-picks { margin-bottom: 28px; }
.mns-picks-label, .mns-most-label, .mns-sec-kicker { font: 500 0.72rem var(--font-mono); text-transform: uppercase; letter-spacing: 0.16em; color: var(--blue); margin: 0 0 12px; }
.mns-picks { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.mns-picks-label { width: 100%; margin-bottom: 0; }
.mns-pick { font: 500 0.8rem var(--font-mono); color: var(--ink-2); background: var(--surface); border: 1px solid var(--line-2); border-radius: 999px; padding: 8px 14px; text-decoration: none; transition: border-color 0.2s, color 0.2s, background 0.2s; }
.mns-pick:hover, .mns-pick:focus-visible { border-color: var(--blue); color: var(--blue); background: var(--tint); }

/* ---------- Most common ---------- */
.mns-most { margin-bottom: 10px; }
.mns-most-grid { display: grid; gap: 12px; }
.mns-most-card { display: flex; gap: 14px; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; text-decoration: none; color: var(--ink); transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s; }
.mns-most-card:hover, .mns-most-card:focus-visible { border-color: var(--blue); transform: translateY(-2px); box-shadow: var(--shadow-1); }
.mns-most-rank { flex: none; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 8px; background: var(--tint); color: var(--blue-deep); font: 600 0.85rem var(--font-display); }
.mns-most-body { display: grid; gap: 3px; }
.mns-most-body strong { font: 600 0.98rem var(--font-body); }
.mns-most-body span { font-size: 0.85rem; color: var(--ink-2); }

/* ---------- Sections ---------- */
.mns-sec { margin-top: 46px; scroll-margin-top: calc(var(--header-h) + 18px); }
.mns-sec-head { display: flex; align-items: flex-end; gap: 16px; margin-bottom: 8px; }
.mns-sec-index { font: 600 1rem var(--font-mono); color: var(--line-2); letter-spacing: 0.08em; padding-bottom: 6px; }
.mns-sec-head h2 { font-size: clamp(1.35rem, 1rem + 1.3vw, 1.8rem); font-weight: 600; letter-spacing: -0.01em; margin: 0; }
.mns-sec-lede { color: var(--ink-2); font-size: 0.95rem; max-width: 74ch; margin: 0 0 20px; }

/* ---------- Diagnostic tree ---------- */
.mns-tree { list-style: none; margin: 20px 0 0; padding: 0; max-width: 720px; }
.mns-tree-node { position: relative; background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--line-2); border-radius: 10px; padding: 16px 18px; }
.mns-tree-num { display: block; font: 600 0.68rem var(--font-mono); letter-spacing: 0.12em; color: var(--ink-3); margin-bottom: 6px; }
.mns-tree-q { font: 600 1.05rem var(--font-display); margin: 0 0 4px; }
.mns-tree-p { font-size: 0.88rem; color: var(--ink-2); margin: 0; }
.mns-tree-branch { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.mns-tree-yes, .mns-tree-no { display: inline-flex; align-items: center; gap: 6px; font: 600 0.76rem var(--font-mono); padding: 8px 13px; border-radius: 8px; text-decoration: none; transition: background 0.2s, border-color 0.2s, color 0.2s; }
.mns-tree-yes { border: 1px solid var(--line-2); color: var(--ink-2); }
.mns-tree-yes:hover, .mns-tree-yes:focus-visible { border-color: var(--blue); color: var(--blue); background: var(--tint); }
.mns-tree-no { border: 1px solid #e3c08a; background: #fdf6e9; color: #8a5b12; }
.mns-tree-no::before { content: "✕ "; font-weight: 700; }
.mns-tree-no:hover, .mns-tree-no:focus-visible { background: #fbeccd; }
.mns-tree-conn { height: 22px; margin-left: 30px; }
.mns-tree-conn span { display: block; width: 2px; height: 100%; background: var(--line-2); }
.mns-tree-final { border-left-color: var(--cyan); background: var(--tint); }

/* ---------- Signal path diagram ---------- */
.mns-diagram { margin: 40px 0 0; background: var(--dark-2); border: 1px solid var(--dark-line); border-radius: 14px; padding: 14px; }
.mns-diagram svg { display: block; width: 100%; height: auto; }
.mns-diagram figcaption { font-size: 0.78rem; color: #7f95b5; text-align: center; padding: 10px 8px 4px; margin: 0; }
.mns-box { fill: #0e2038; stroke: #2e5f93; stroke-width: 2; }
.mns-screen { fill: #08131f; stroke: #1e3a5f; stroke-width: 1.5; }
.mns-gpu { fill: #122a48; stroke: #1e3a5f; stroke-width: 1.5; }
.mns-fan { fill: none; stroke: #1e3a5f; stroke-width: 1.5; }
.mns-fan-hub { fill: #1e3a5f; }
.mns-port { fill: #2e5f93; }
.mns-stand { fill: #122a48; }
.mns-stand-base { fill: #122a48; stroke: #1e3a5f; stroke-width: 1.5; }
.mns-svg-label { fill: #8aa3c4; font: 500 12px var(--font-mono); letter-spacing: 3px; }
.mns-svg-sub { fill: #7f95b5; font: 400 11px var(--font-mono); letter-spacing: 1px; }
.mns-svg-text { fill: #dbe7f7; font: 600 14px var(--font-mono); letter-spacing: 2px; }
.mns-trace { stroke: #24466f; stroke-width: 2; fill: none; }
.mns-flow { stroke: var(--cyan-bright); stroke-width: 2.4; fill: none; stroke-dasharray: 16 190; opacity: 0.85; animation: mnsflow 3.6s linear infinite; }
@keyframes mnsflow { to { stroke-dashoffset: -206; } }
.mns-glow { animation: mns-glow-pulse 7s ease-in-out infinite alternate; transform-box: fill-box; transform-origin: center; }
@keyframes mns-glow-pulse { from { opacity: 0.6; } to { opacity: 1; transform: scale(1.04); } }
.mns-postled { fill: var(--ok); animation: mns-blink 2.2s ease-in-out infinite; }
.mns-nosignal { fill: var(--warn); font: 600 15px var(--font-mono); letter-spacing: 4px; animation: mns-blink 2.4s ease-in-out infinite; }
.mns-nosignal-dot { fill: var(--warn); opacity: 0.6; }
@keyframes mns-blink { 50% { opacity: 0.45; } }

/* ---------- Directory: search, chips, cards ---------- */
.mns-filterbar { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.mns-search { display: flex; align-items: center; gap: 10px; background: var(--surface); border: 1.5px solid var(--line-2); border-radius: 10px; padding: 9px 14px; min-width: min(340px, 100%); transition: border-color 0.2s, box-shadow 0.2s; }
.mns-search:focus-within { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(15, 91, 215, 0.12); }
.mns-search svg { color: var(--ink-3); flex: none; }
.mns-search input { flex: 1; min-width: 0; border: 0; background: transparent; font: 400 0.92rem var(--font-body); color: var(--ink); }
.mns-search input:focus { outline: none; }
.mns-search input::placeholder { color: var(--ink-3); }
.mns-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.mns-chip { font: 500 0.76rem var(--font-mono); color: var(--ink-2); background: var(--surface); border: 1px solid var(--line-2); border-radius: 999px; padding: 7px 14px; cursor: pointer; transition: border-color 0.2s, color 0.2s, background 0.2s; }
.mns-chip:hover { border-color: var(--blue); color: var(--blue); }
.mns-chip[aria-pressed="true"] { background: var(--blue); border-color: var(--blue); color: #fff; }
.mns-count { font: 500 0.74rem var(--font-mono); color: var(--ink-3); margin: 0 0 16px; }
.mns-cards { display: grid; grid-template-columns: 1fr; gap: 12px; }
.mns-card { display: flex; flex-direction: column; gap: 6px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; text-decoration: none; color: var(--ink); transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s; }
.mns-card:hover, .mns-card:focus-visible { border-color: var(--blue); transform: translateY(-3px); box-shadow: var(--shadow-1); }
.mns-card.is-hidden { display: none; }
.mns-card.is-target { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(15, 91, 215, 0.15); }
.mns-card-cat { font: 500 0.66rem var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--blue); }
.mns-card-title { font-weight: 600; font-size: 0.95rem; line-height: 1.3; }
.mns-card-time { font-size: 0.72rem; color: var(--ink-3); }

/* ---------- Articles (native <details> accordions) ---------- */
.mns-art { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 12px; transition: border-color 0.2s; }
.mns-art[open] { border-color: var(--blue-soft); }
.mns-art-sum { display: flex; align-items: center; gap: 14px; padding: 16px 18px; cursor: pointer; list-style: none; }
.mns-art-sum::-webkit-details-marker { display: none; }
.mns-art-num { flex: none; font-size: 0.72rem; color: var(--ink-3); letter-spacing: 0.06em; }
.mns-art-body { flex: 1; min-width: 0; display: grid; gap: 2px; }
.mns-art-title { font: 600 1.02rem var(--font-body); color: var(--ink); }
.mns-art-meta { display: flex; align-items: center; gap: 10px; }
.mns-art-time { font-size: 0.72rem; color: var(--ink-3); }
.mns-art-ico { position: relative; width: 16px; height: 16px; margin-left: auto; }
.mns-art-ico::before, .mns-art-ico::after { content: ""; position: absolute; left: 0; top: 7px; width: 16px; height: 2px; background: var(--ink-3); transition: transform 0.25s, background 0.25s; }
.mns-art-ico::after { transform: rotate(90deg); }
.mns-art[open] .mns-art-ico::after { transform: rotate(0deg); }
.mns-art[open] .mns-art-ico::before, .mns-art[open] .mns-art-ico::after { background: var(--blue); }
.mns-art-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.35s ease; }
.mns-art[open] .mns-art-panel { grid-template-rows: 1fr; }
.mns-art-inner { overflow: hidden; min-height: 0; visibility: hidden; transition: visibility 0s 0.35s; padding: 0 20px; }
.mns-art[open] .mns-art-inner { visibility: visible; transition-delay: 0s; padding-bottom: 20px; }
.mns-art-inner p { color: var(--ink-2); font-size: 0.95rem; }

/* ---------- Checklist ---------- */
.mns-check { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-1); }
.mns-check-file { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--ink-3); border-bottom: 1px dashed var(--line-2); padding-bottom: 12px; margin: 0 0 12px; }
.mns-check-list li { margin: 0; }
.mns-check-list label { display: flex; align-items: flex-start; gap: 12px; padding: 10px 8px; border-radius: 8px; cursor: pointer; transition: background 0.15s; font-size: 0.92rem; color: var(--ink-2); }
.mns-check-list label:hover { background: #f2f7ff; }
.mns-check-list input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--blue); flex: none; cursor: pointer; }
.mns-check-list input:checked + span { color: var(--ink); }
.mns-check-list strong { color: var(--ink); font-weight: 600; }
.mns-check-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.mns-check-hint { font-size: 0.7rem; color: var(--ink-3); margin: 0; }

/* ---------- FAQ ---------- */
.mns-faq { display: grid; gap: 10px; }
.mns-faq-item { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; transition: border-color 0.2s; }
.mns-faq-item[open] { border-color: var(--blue-soft); }
.mns-faq-sum { display: flex; align-items: center; gap: 12px; padding: 15px 16px; cursor: pointer; list-style: none; font-weight: 600; font-size: 0.95rem; color: var(--ink); }
.mns-faq-sum::-webkit-details-marker { display: none; }
.mns-faq-ico { position: relative; width: 14px; height: 14px; flex: none; margin-left: auto; }
.mns-faq-ico::before, .mns-faq-ico::after { content: ""; position: absolute; left: 0; top: 6px; width: 14px; height: 2px; background: var(--ink-3); transition: transform 0.25s, background 0.25s; }
.mns-faq-ico::after { transform: rotate(90deg); }
.mns-faq-item[open] .mns-faq-ico::after { transform: rotate(0deg); }
.mns-faq-item[open] .mns-faq-ico::before, .mns-faq-item[open] .mns-faq-ico::after { background: var(--blue); }
.mns-faq-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.3s ease; }
.mns-faq-item[open] .mns-faq-panel { grid-template-rows: 1fr; }
.mns-faq-inner { overflow: hidden; min-height: 0; visibility: hidden; transition: visibility 0s 0.3s; }
.mns-faq-item[open] .mns-faq-inner { visibility: visible; transition-delay: 0s; }
.mns-faq-inner p { margin: 0; padding: 0 16px 16px; color: var(--ink-2); font-size: 0.92rem; max-width: 78ch; }

/* ---------- Related ---------- */
.mns-related { display: grid; gap: 12px; }
.mns-rel { display: grid; grid-template-columns: auto 1fr auto; gap: 4px 14px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; text-decoration: none; color: var(--ink); transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s; }
.mns-rel:hover, .mns-rel:focus-visible { border-color: var(--blue); transform: translateY(-2px); box-shadow: var(--shadow-1); }
.mns-rel-k { grid-row: 1 / span 3; font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--blue); background: var(--tint); border-radius: 999px; padding: 5px 10px; text-align: center; }
.mns-rel-t { font-weight: 600; font-size: 0.98rem; }
.mns-rel-d { font-size: 0.84rem; color: var(--ink-2); }
.mns-rel-arrow { grid-row: 1 / span 3; color: var(--blue); align-self: center; }

/* ---------- Local footer ---------- */
.mns-foot { margin: 48px 0 8px; padding-top: 18px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; font: 500 0.72rem var(--font-mono); color: var(--ink-3); }
.mns-foot p { margin: 0; }

/* ---------- Responsive ---------- */
@media (min-width: 560px) {
  .mns-most-grid { grid-template-columns: 1fr 1fr; }
  .mns-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .mns-cards { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1000px) {
  .mns-grid { grid-template-columns: 220px minmax(0, 1fr); gap: 40px; }
  .mns-toc { display: block; position: sticky; top: calc(var(--header-h) + 20px); max-height: calc(100vh - var(--header-h) - 40px); overflow-y: auto; }
}
@media (min-width: 1240px) {
  .mns-cards { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Dark theme ---------- */
[data-theme="dark"] .mns-check-list label:hover { background: #14233a; }
[data-theme="dark"] .mns-tree-no { background: #2a2110; border-color: #6b5426; color: #f5c97a; }
[data-theme="dark"] .mns-tree-no:hover { background: #332812; }
[data-theme="dark"] .mns-tree-final { background: #12233c; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .mns-flow { animation: none; stroke-dasharray: none; opacity: 0.35; }
  .mns-glow, .mns-postled, .mns-nosignal { animation: none; }
  .mns-art-panel, .mns-art-inner, .mns-faq-panel, .mns-faq-inner, .mns-art-ico::before, .mns-art-ico::after, .mns-faq-ico::before, .mns-faq-ico::after { transition: none; }
}