/* ============================================================
   DiagMyPCHub — Peripherals library
   Local stylesheet. Depends on the site design tokens from
   ../../../css/style.css (loaded first in <head>). All
   tutorial styles are namespaced with the "per-" prefix.
   Reuses global .table-wrap, .btn, .mono, .visually-hidden.
   ============================================================ */

/* ---------- Reading progress ---------- */
.per-progress{ position:fixed; top:0; left:0; right:0; height:3px; z-index:120; background:transparent; pointer-events:none; }
.per-progress span{ display:block; height:100%; width:0; background:linear-gradient(90deg, var(--blue), var(--cyan-bright)); }

/* ---------- Grid: TOC + content ---------- */
.per-grid{ display:grid; grid-template-columns:1fr; gap:40px; padding-top:clamp(32px,5vw,56px); padding-bottom:clamp(56px,8vw,96px); }
.per-toc{ display:none; }
.per-toc-title{ font:500 .7rem var(--font-mono); text-transform:uppercase; letter-spacing:.14em; color:var(--ink-3); margin:0 0 12px; }
.per-toc ul{ display:grid; gap:1px; border-left:1px solid var(--line); }
.per-toc a{ display:block; padding:6px 14px; margin-left:-1px; border-left:2px solid transparent; color:var(--ink-2); text-decoration:none; font-size:.85rem; transition:color .2s, border-color .2s; }
.per-toc a:hover{ color:var(--ink); }
.per-toc a[aria-current="true"]{ color:var(--blue); border-left-color:var(--blue); font-weight:500; }
.per-article{ max-width:900px; min-width:0; }

/* ---------- Head ---------- */
.per-head h1{ font-size:clamp(1.8rem, 1.2rem + 2.4vw, 2.7rem); font-weight:700; letter-spacing:-.02em; line-height:1.12; margin:0 0 20px; }
.per-intro{ font-size:1.02rem; color:var(--ink-2); line-height:1.7; margin:0 0 16px; max-width:80ch; }
.per-intro strong{ color:var(--ink); }

/* ---------- Warning / callouts ---------- */
.per-warn{ display:flex; gap:14px; align-items:flex-start; background:#fdf3e6; border:1px solid #f0d6a8; border-radius:var(--radius); padding:16px 18px; margin:28px 0; }
.per-warn-ico{ flex:none; width:24px; height:24px; display:grid; place-items:center; border-radius:50%; background:var(--warn); color:#3a2a00; font:700 .95rem/1 var(--font-display); }
.per-warn-title{ margin:0 0 6px; font-weight:600; font-size:.98rem; }
.per-warn-text{ margin:0; font-size:.92rem; color:#6b5320; }

/* ---------- Animated SVG diagram ---------- */
.per-diagram{ margin:0 0 8px; background:var(--dark-2); border:1px solid var(--dark-line); border-radius:14px; padding:clamp(8px, 2vw, 18px); }
.per-diagram svg{ width:100%; height:auto; display:block; }

.per-glow{ animation:perGlow 7s ease-in-out infinite alternate; transform-box:fill-box; transform-origin:center; }
@keyframes perGlow{ from{ opacity:.6; } to{ opacity:1; transform:scale(1.04); } }
.per-trace{ stroke:#24466f; stroke-width:2; fill:none; stroke-dasharray:6 10; animation:perFlow 1.8s linear infinite; }
@keyframes perFlow{ to{ stroke-dashoffset:-32; } }
.per-via{ fill:#24466f; }
.per-node{ fill:#41e2f5; opacity:.85; animation:perNode 2.4s ease-in-out infinite; }
@keyframes perNode{ 50%{ opacity:.35; } }
.per-dev{ fill:#0b1a30; stroke:#24466f; stroke-width:2; }
.per-keys rect{ fill:#12314f; }
.per-key-active{ fill:#41e2f5; opacity:.5; animation:perKey 1.6s ease-in-out infinite; }
@keyframes perKey{ 50%{ opacity:1; } }
.per-mousetrack{ stroke:#2e5f93; stroke-width:1.5; }
.per-wheel{ fill:#2e5f93; }
.per-paper{ fill:#12314f; stroke:#24466f; stroke-width:1; }
.per-out{ fill:#1a3a5c; stroke:#2e5f93; stroke-width:1; }
.per-led{ fill:#41e2f5; animation:perLed 2s steps(1) infinite; }
@keyframes perLed{ 50%{ opacity:.2; } }
.per-btcirc{ fill:#0b1a30; stroke:#24466f; stroke-width:2; }
.per-btring{ fill:none; stroke:#41e2f5; stroke-width:1.5; opacity:0; transform-box:fill-box; transform-origin:center; animation:perPing 3.4s ease-out infinite; }
@keyframes perPing{ 0%{ transform:scale(.9); opacity:.6; } 70%{ transform:scale(1.25); opacity:0; } 100%{ opacity:0; } }
.per-btrune{ fill:none; stroke:#41e2f5; stroke-width:2.5; stroke-linejoin:round; stroke-linecap:round; }
.per-board{ fill:#0b1a30; stroke:#24466f; stroke-width:2; }
.per-die{ fill:#0e2038; stroke:#2e5f93; stroke-width:1.5; }
.per-core{ fill:#41e2f5; opacity:.9; animation:perCore 2.4s ease-in-out infinite; transform-box:fill-box; transform-origin:center; }
@keyframes perCore{ 50%{ transform:scale(1.15); opacity:.6; } }
.per-ring{ fill:none; stroke:#41e2f5; stroke-width:1.5; opacity:0; transform-box:fill-box; transform-origin:center; animation:perRing 3s ease-out infinite; }
@keyframes perRing{ 0%{ transform:scale(.6); opacity:.7; } 70%{ transform:scale(1.9); opacity:0; } 100%{ opacity:0; } }
.per-usb path{ stroke:#071120; stroke-width:2; fill:none; stroke-linecap:round; }
.per-usb circle{ fill:#071120; }
.per-usb circle[fill="none"]{ fill:none; stroke:#071120; stroke-width:1.8; }
.per-usb rect{ fill:#071120; }
.per-usb path[stroke="none"]{ fill:#071120; }
.per-label{ fill:#8aa3c4; font:600 12px var(--font-mono); letter-spacing:2px; }
.per-status{ fill:#5b7396; font:500 12px var(--font-mono); letter-spacing:1px; }

/* ---------- Static image placeholder (hidden until an image exists) ---------- */
.per-figure{ margin:0 0 8px; }
.per-figure img{ width:100%; height:auto; border:1px solid var(--line); border-radius:var(--radius); background:var(--surface); display:block; }
.per-figure figcaption{ margin-top:10px; font:400 .78rem var(--font-mono); color:var(--ink-3); }
.per-figure[data-empty="true"]{ display:none; }

/* ---------- Sections ---------- */
.per-sec{ margin-top:clamp(48px, 7vw, 72px); scroll-margin-top:calc(var(--header-h) + 16px); }
.per-sec-head{ display:flex; align-items:flex-start; gap:16px; margin-bottom:18px; }
.per-sec-index{ font:600 .95rem var(--font-mono); color:var(--line-2); flex:none; padding-top:4px; }
.per-sec-kicker{ font:500 .7rem var(--font-mono); text-transform:uppercase; letter-spacing:.16em; color:var(--blue); margin:0 0 4px; }
.per-sec-head h2{ font-size:clamp(1.3rem, 1rem + 1.2vw, 1.7rem); font-weight:600; letter-spacing:-.01em; margin:0; }
.per-sec-lede{ color:var(--ink-2); font-size:1rem; line-height:1.7; margin:0 0 18px; max-width:80ch; }
.per-article > .per-sec p, .per-sec .per-sec-lede + p{ color:var(--ink-2); line-height:1.75; margin:0 0 16px; }

/* ---------- Filter toolbar ---------- */
.per-toolbar{ margin:28px 0 12px; display:grid; gap:14px; }
.per-search{ display:flex; align-items:center; gap:10px; background:var(--surface); border:1.5px solid var(--line-2); border-radius:10px; padding:10px 12px; max-width:560px; transition:border-color .2s, box-shadow .2s; }
.per-search:focus-within{ border-color:var(--blue); box-shadow:0 0 0 4px rgba(15,91,215,.12); }
.per-search svg{ color:var(--ink-3); flex:none; }
.per-search input{ flex:1; min-width:0; border:0; background:transparent; font:400 .95rem var(--font-body); color:var(--ink); }
.per-search input:focus{ outline:none; }
.per-search input::placeholder{ color:var(--ink-3); }
.per-search input::-webkit-search-cancel-button{ display:none; }
.per-search-clear{ flex:none; width:28px; height:28px; display:grid; place-items:center; border:0; border-radius:50%; background:var(--tint); color:var(--ink-2); font-size:1rem; line-height:1; cursor:pointer; transition:background .2s, color .2s; }
.per-search-clear:hover{ background:var(--line); color:var(--ink); }
.per-chips{ display:flex; flex-wrap:wrap; gap:8px; }
.per-chip{ font:500 .78rem 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 .2s, color .2s, background .2s; }
.per-chip:hover{ border-color:var(--blue); color:var(--blue); }
.per-chip.is-active{ background:var(--blue); border-color:var(--blue); color:#fff; }
.per-count{ font:500 .74rem var(--font-mono); color:var(--ink-3); margin:0 0 18px; min-height:1.2em; }
.per-noresult{ border:1px dashed var(--line-2); border-radius:var(--radius); padding:24px; text-align:center; margin-bottom:18px; }
.per-noresult p{ margin:0 0 12px; color:var(--ink-2); }

/* ---------- Article cards ---------- */
.per-art{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:20px; margin-bottom:14px; scroll-margin-top:calc(var(--header-h) + 16px); transition:border-color .2s; }
.per-art:hover{ border-color:var(--blue-soft); }
.per-art.is-hidden{ display:none; }
.per-art-head{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; flex-wrap:wrap; margin-bottom:10px; }
.per-art-head h3{ font-size:1.08rem; font-weight:600; margin:0; letter-spacing:-.01em; }
.per-meta{ font:500 .68rem var(--font-mono); color:var(--ink-3); letter-spacing:.04em; white-space:nowrap; }
.per-art p{ color:var(--ink-2); font-size:.93rem; line-height:1.7; margin:0 0 12px; }
.per-art p strong{ color:var(--ink); }
.per-art a{ color:var(--blue); text-decoration:underline; text-underline-offset:2px; text-decoration-color:var(--blue-soft); }
.per-art a:hover{ text-decoration-color:var(--blue); }
.per-art .mono, .per-sec .mono{ font-family:var(--font-mono); font-size:.86em; background:var(--tint); border-radius:4px; padding:1px 5px; }

/* ---------- Steps ---------- */
.per-steps{ counter-reset:per-step; list-style:none; padding:0; margin:6px 0 4px; display:grid; gap:10px; }
.per-steps > li{ counter-increment:per-step; position:relative; padding:0 0 0 44px; margin:0; font-size:.93rem; color:var(--ink-2); line-height:1.65; min-height:34px; }
.per-steps > li::before{ content:counter(per-step, decimal-leading-zero); position:absolute; left:0; top:1px; width:30px; height:30px; display:grid; place-items:center; font:600 .72rem var(--font-mono); color:var(--blue-deep); background:var(--tint); border:1px solid var(--blue-soft); border-radius:8px; }
.per-steps > li strong{ color:var(--ink); }

/* ---------- Version note ---------- */
.per-vnote{ font-size:.82rem; color:var(--ink-3); border-left:2px solid var(--cyan); padding-left:10px; margin:0 0 12px; }

/* ---------- Copyable commands ---------- */
.per-cmd{ display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:12px; background:var(--surface); border:1px solid var(--line); border-radius:10px; padding:12px 14px; margin:10px 0; }
.per-cmd-label{ font:500 .68rem var(--font-mono); text-transform:uppercase; letter-spacing:.08em; color:var(--ink-3); min-width:88px; }
.per-cmd code{ font:500 .84rem var(--font-mono); color:var(--ink); background:var(--tint); border-radius:6px; padding:6px 10px; overflow-x:auto; white-space:nowrap; }
.per-cmd-copy{ font:500 .78rem var(--font-mono); color:var(--blue); background:none; border:1px solid var(--blue-soft); border-radius:7px; padding:6px 12px; cursor:pointer; transition:background .2s, color .2s; flex:none; }
.per-cmd-copy:hover{ background:var(--blue); color:#fff; border-color:var(--blue); }
.per-cmd-note{ grid-column:1 / -1; margin:2px 0 0; font-size:.8rem; color:var(--ink-3); }

/* ---------- FAQ (native details) ---------- */
.per-faq{ display:grid; gap:10px; }
.per-faq-item{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); transition:border-color .2s; }
.per-faq-item[open]{ border-color:var(--blue-soft); }
.per-faq-sum{ list-style:none; cursor:pointer; display:flex; align-items:center; gap:12px; padding:16px 18px; font-weight:600; font-size:.98rem; color:var(--ink); }
.per-faq-sum::-webkit-details-marker{ display:none; }
.per-faq-ico{ margin-left:auto; position:relative; width:16px; height:16px; flex:none; }
.per-faq-ico::before, .per-faq-ico::after{ content:""; position:absolute; left:0; top:7px; width:16px; height:2px; background:var(--ink-3); transition:transform .25s, background .25s; }
.per-faq-ico::after{ transform:rotate(90deg); }
.per-faq-item[open] .perf-faq-ico::after, .per-faq-item[open] .per-faq-ico::after{ transform:rotate(0deg); }
.per-faq-item[open] .per-faq-ico::before, .per-faq-item[open] .per-faq-ico::after{ background:var(--blue); }
.per-faq-panel{ display:grid; grid-template-rows:0fr; transition:grid-template-rows .35s ease; }
.per-faq-item[open] .per-faq-panel{ grid-template-rows:1fr; }
.per-faq-inner{ overflow:hidden; min-height:0; visibility:hidden; transition:visibility 0s .35s; }
.per-faq-item[open] .per-faq-inner{ visibility:visible; transition-delay:0s; }
.per-faq-inner p{ margin:0; padding:0 18px 18px; color:var(--ink-2); font-size:.95rem; line-height:1.7; }

/* ---------- Related guides ---------- */
.per-related{ display:grid; grid-template-columns:1fr; gap:14px; margin-top:8px; }
.per-related-card{ display:flex; flex-direction:column; gap:6px; padding:18px; background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); text-decoration:none; color:var(--ink); transition:border-color .2s, transform .2s, box-shadow .2s; }
.per-related-card:hover, .per-related-card:focus-visible{ border-color:var(--blue); transform:translateY(-3px); box-shadow:var(--shadow-1); }
.per-related-title{ font-size:1.02rem; font-weight:600; margin:0; }
.per-related-sub{ font-size:.86rem; color:var(--ink-2); margin:0; }

/* ---------- Article footer ---------- */
.per-foot{ margin-top:48px; padding-top:20px; border-top:1px solid var(--line); }
.per-foot p{ font-size:.85rem; color:var(--ink-3); margin:0; }

/* ---------- Ad slot (self-contained; hides when empty) ---------- */
.ad-wrap{ margin:clamp(40px, 6vw, 64px) 0; }
.ad-slot{ display:none; }
.ad-slot:not(:empty){ display:flex; align-items:center; justify-content:center; position:relative; max-width:720px; min-height:250px; margin-inline:auto; border:1px dashed var(--line-2); background:var(--surface); border-radius:var(--radius); overflow:hidden; }
.ad-slot:not(:empty)::before{ content:"Advertisement"; position:absolute; top:8px; right:12px; font:500 .62rem var(--font-mono); text-transform:uppercase; letter-spacing:.1em; color:var(--ink-3); }
.ad-slot:not(:empty) *{ max-width:100%; }

/* ---------- Responsive ---------- */
@media (min-width:560px){
  .per-related{ grid-template-columns:1fr 1fr; }
  .per-cmd{ grid-template-columns:auto 1fr auto; }
}
@media (min-width:1000px){
  .per-grid{ grid-template-columns:230px minmax(0,1fr); gap:56px; }
  .per-toc{ display:block; position:sticky; top:calc(var(--header-h) + 24px); align-self:start; max-height:calc(100vh - var(--header-h) - 48px); overflow:auto; }
}
@media (max-width:559px){
  .per-cmd{ grid-template-columns:1fr; }
  .per-cmd-label{ min-width:0; }
  .per-art{ padding:16px; }
  .per-steps > li{ padding-left:40px; }
  .per-meta{ white-space:normal; }
}

/* ---------- Dark theme (loaded after this file) ---------- */
[data-theme="dark"] .per-warn{ background:#241a09; border-color:#5a4417; }
[data-theme="dark"] .per-warn-text{ color:#d8b878; }
[data-theme="dark"] .per-art .mono, [data-theme="dark"] .per-sec .mono{ background:var(--tint); }
[data-theme="dark"] .per-cmd code{ background:var(--tint); }
[data-theme="dark"] .per-steps > li::before{ background:var(--tint); color:var(--blue); border-color:var(--blue-soft); }
[data-theme="dark"] .per-search-clear{ background:var(--tint); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  .per-progress{ display:none; }
  .per-glow, .per-trace, .per-node, .per-key-active, .per-led, .per-btring, .per-core, .per-ring{ animation:none !important; }
  .per-ring, .per-btring{ opacity:0; }
  .per-node{ opacity:.7; }
  .per-faq-panel, .per-faq-inner{ transition:none; }
  .per-art, .per-related-card{ transition:none; }
}

/* ---------- Print ---------- */
@media print{
  .per-progress, .per-toc, .to-top, .site-header, .topbar, .per-diagram, .ad-wrap, .per-toolbar, .per-noresult, .per-count, .site-footer, .consent{ display:none !important; }
  .per-grid{ display:block; padding:0; }
  .per-article{ max-width:100%; }
  .per-art{ break-inside:avoid; border-color:#ccc; }
  a{ color:var(--ink); text-decoration:none; }
}