/* ============================================================
   DiagMyPCHub — CPU Problems tutorial (page-local styles)
   Depends on the site design tokens in ../../css/style.css
   (loaded first in <head>). All page styles use the "cpu-"
   prefix so nothing leaks into the shared stylesheet.
   ============================================================ */

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

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

/* ---------- Article head ---------- */
.cpu-article{ max-width:820px; }
.cpu-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; }
.cpu-intro{ font-size:1.05rem; color:var(--ink-2); line-height:1.7; margin:0 0 16px; }

/* ---------- Callouts ---------- */
.cpu-callout{ border-left:3px solid var(--blue); background:var(--tint); border-radius:0 var(--radius) var(--radius) 0; padding:14px 18px; margin:24px 0; font-size:.95rem; color:var(--ink-2); }
.cpu-callout p{ margin:0; }
.cpu-callout strong{ color:var(--ink); }
.cpu-callout.cpu-note{ border-left-color:var(--cyan); background:#eafaf7; }
.cpu-callout.cpu-tip{ border-left-color:var(--ok); background:#eafaf3; }

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

/* ---------- Sections & topics ---------- */
.cpu-sec{ margin-top:clamp(48px, 7vw, 72px); scroll-margin-top:calc(var(--header-h) + 16px); }
.cpu-sec-head{ display:flex; align-items:flex-start; gap:16px; margin-bottom:18px; }
.cpu-sec-index{ font:600 .95rem var(--font-mono); color:var(--line-2); flex:none; padding-top:4px; }
.cpu-sec-kicker{ font:500 .7rem var(--font-mono); text-transform:uppercase; letter-spacing:.16em; color:var(--blue); margin:0 0 4px; }
.cpu-sec-head h2{ font-size:clamp(1.3rem, 1rem + 1.2vw, 1.7rem); font-weight:600; letter-spacing:-.01em; margin:0; }
.cpu-sec-lede{ color:var(--ink-2); font-size:1rem; line-height:1.7; margin:0 0 18px; max-width:70ch; }
.cpu-article p{ color:var(--ink-2); line-height:1.75; margin:0 0 16px; }
.cpu-article p strong, .cpu-article p em{ color:var(--ink); }
.cpu-article a{ color:var(--blue); text-decoration:underline; text-underline-offset:2px; text-decoration-color:var(--blue-soft); transition:text-decoration-color .2s; }
.cpu-article a:hover{ text-decoration-color:var(--blue); }
.cpu-article ul, .cpu-article ol{ margin:0 0 16px; padding-left:22px; color:var(--ink-2); line-height:1.7; }
.cpu-article li{ margin-bottom:8px; }
.cpu-article li::marker{ color:var(--blue); }

.cpu-topic{ margin-top:34px; scroll-margin-top:calc(var(--header-h) + 16px); }
.cpu-topic h3{ font-size:1.15rem; font-weight:600; margin:0 0 10px; padding-left:14px; border-left:3px solid var(--blue-soft); }

/* ---------- Numbered method steps ---------- */
.cpu-steps{ counter-reset:cpu-step; list-style:none; padding:0; margin:0 0 20px; display:grid; gap:12px; }
.cpu-steps > li{ counter-increment:cpu-step; position:relative; padding:0 0 0 46px; margin:0; min-height:40px; }
.cpu-steps > li::before{ content:counter(cpu-step, decimal-leading-zero); position:absolute; left:0; top:0; width:32px; height:32px; display:grid; place-items:center; font:600 .78rem var(--font-mono); color:var(--blue-deep); background:var(--tint); border:1px solid var(--blue-soft); border-radius:9px; }
.cpu-steps > li strong{ color:var(--ink); }

/* ---------- Symptom selector ---------- */
.cpu-sel{ margin:24px 0; }
.cpu-sel-grid{ display:grid; grid-template-columns:repeat(auto-fill, minmax(180px, 1fr)); gap:10px; margin-bottom:16px; }
.cpu-sel-btn{ font:500 .88rem var(--font-body); color:var(--ink-2); background:var(--surface); border:1px solid var(--line-2); border-radius:10px; padding:12px 14px; cursor:pointer; text-align:left; transition:border-color .2s, color .2s, background .2s, transform .15s; }
.cpu-sel-btn:hover{ border-color:var(--blue); color:var(--ink); transform:translateY(-1px); }
.cpu-sel-btn[aria-pressed="true"]{ background:var(--blue); border-color:var(--blue); color:#fff; }
.cpu-sel-panel{ border:1px solid var(--line); border-left:3px solid var(--cyan); border-radius:var(--radius); background:var(--surface); padding:18px 20px; }
.cpu-sel-panel p{ margin:0 0 12px; font-size:.95rem; color:var(--ink-2); line-height:1.7; }
.cpu-sel-panel ul{ list-style:none; padding:0; margin:0; display:grid; gap:8px; }
.cpu-sel-panel a{ font-size:.92rem; }

/* ---------- Topic index filter ---------- */
.cpu-idx-filters{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:12px; }
.cpu-idx-btn{ font:500 .82rem var(--font-mono); color:var(--ink-2); background:var(--surface); border:1px solid var(--line-2); border-radius:999px; padding:9px 16px; cursor:pointer; transition:border-color .2s, color .2s, background .2s; }
.cpu-idx-btn:hover{ border-color:var(--blue); color:var(--blue); }
.cpu-idx-btn[aria-pressed="true"]{ background:var(--blue); border-color:var(--blue); color:#fff; }
.cpu-idx-count{ font:500 .78rem var(--font-mono); color:var(--ink-3); margin:0 0 16px; min-height:1.2em; }
.cpu-idx-grid{ display:grid; grid-template-columns:1fr; gap:10px; }
.cpu-idx-card{ display:flex; align-items:center; gap:10px; padding:12px 14px; background:var(--surface); border:1px solid var(--line); border-radius:10px; text-decoration:none; color:var(--ink); transition:border-color .2s, transform .2s, box-shadow .2s; }
.cpu-idx-card:hover{ border-color:var(--blue); transform:translateY(-2px); box-shadow:var(--shadow-1); }
.cpu-idx-card.is-hidden{ display:none; }
.cpu-idx-num{ font:600 .72rem var(--font-mono); color:var(--line-2); flex:none; min-width:22px; }
.cpu-idx-title{ font-size:.9rem; font-weight:500; flex:1; line-height:1.35; }
.cpu-idx-tag{ flex:none; width:22px; height:22px; display:grid; place-items:center; font:600 .7rem var(--font-mono); border-radius:6px; }
.c-a{ color:#1d4fb8; background:#eaf2fd; }
.c-b{ color:#8a5a12; background:#fdf3e6; }
.c-c{ color:#a03d37; background:#fdecea; }
.c-d{ color:#0b7f8c; background:#eafaf7; }
.c-e{ color:#5b3fb0; background:#f1ecfd; }
.c-f{ color:#1f7a4d; background:#eafaf1; }
.c-g{ color:#44546b; background:#eef1f6; }

/* ---------- Copyable blocks ---------- */
.cpu-cmd{ display:grid; grid-template-columns:auto 1fr auto; align-items:start; gap:12px; background:var(--surface); border:1px solid var(--line); border-radius:10px; padding:12px 14px; margin:14px 0; }
.cpu-cmd-label{ font:500 .68rem var(--font-mono); text-transform:uppercase; letter-spacing:.08em; color:var(--ink-3); min-width:96px; padding-top:4px; }
.cpu-cmd code{ font:500 .8rem var(--font-mono); color:var(--ink); background:var(--tint); border-radius:6px; padding:8px 10px; overflow-x:auto; white-space:pre; line-height:1.6; max-width:100%; }
.cpu-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; }
.cpu-cmd-copy:hover{ background:var(--blue); color:#fff; border-color:var(--blue); }
.cpu-cmd-copy.is-done{ background:var(--ok); border-color:var(--ok); color:#06281c; }
.cpu-cmd-note{ grid-column:1 / -1; margin:2px 0 0; font-size:.8rem; color:var(--ink-3); }

/* ---------- Diagnostic decision tree ---------- */
.cpu-tree{ margin:24px 0; }
.cpu-tree-status{ font:500 .72rem var(--font-mono); text-transform:uppercase; letter-spacing:.1em; color:var(--ink-3); margin:0 0 8px; min-height:1.2em; }
.cpu-tree-q{ font-size:1.1rem; font-weight:600; margin:0 0 14px; min-height:1.4em; }
.cpu-tree-opts{ display:grid; grid-template-columns:1fr; gap:10px; margin-bottom:16px; }
.cpu-tree-btn{ text-align:left; font:500 .95rem var(--font-body); color:var(--ink); background:var(--surface); border:1px solid var(--line-2); border-radius:var(--radius); padding:13px 16px; cursor:pointer; transition:border-color .2s, background .2s, transform .15s; }
.cpu-tree-btn:hover{ border-color:var(--blue); background:var(--tint); transform:translateY(-1px); }
.cpu-tree-rec{ border:1px solid var(--line); border-left:3px solid var(--cyan); border-radius:var(--radius); background:var(--surface); padding:18px 20px; margin-bottom:12px; }
.cpu-tree-rec p{ margin:0 0 12px; font-size:.95rem; color:var(--ink-2); line-height:1.7; }
.cpu-tree-rec p:last-child{ margin-bottom:0; }
.cpu-tree-rec strong{ color:var(--ink); }
.cpu-noscript{ font-size:.9rem; color:var(--ink-2); border-left:3px solid var(--line-2); padding-left:14px; margin:0; }

/* ---------- Diagnostic checklist ---------- */
.cpu-check{ background:var(--surface); color:var(--ink); border:1px solid var(--line); border-radius:14px; padding:20px; margin-top:24px; }
.cpu-check-file{ display:flex; justify-content:space-between; font-size:.72rem; color:var(--ink-3); border-bottom:1px dashed var(--line-2); padding-bottom:12px; margin:0 0 12px; }
.cpu-check-list{ list-style:none; padding:0; margin:0; }
.cpu-check-list li{ margin:0; }
.cpu-check-list label{ display:flex; align-items:flex-start; gap:12px; padding:10px 8px; border-radius:8px; cursor:pointer; transition:background .15s; font-size:.93rem; color:var(--ink-2); }
.cpu-check-list label:hover{ background:#f2f7ff; }
.cpu-check-list input{ width:18px; height:18px; margin:2px 0 0; accent-color:var(--blue); flex:none; cursor:pointer; }
.cpu-check-list input:checked + span{ color:var(--ink); }
.cpu-check-actions{ display:flex; align-items:center; flex-wrap:wrap; gap:12px; margin-top:16px; padding-top:16px; border-top:1px solid var(--line); }
.cpu-check-hint{ font-size:.7rem; color:var(--ink-3); margin:0; }

/* ---------- Animated diagnostic schematic ---------- */
.cpu-diagram{ background:var(--dark-2); border:1px solid var(--dark-line); border-radius:14px; padding:clamp(10px, 2vw, 18px); margin:24px 0; }
.cpu-diagram svg{ width:100%; height:auto; display:block; }
.cpu-glow{ animation:cpuGlow 7s ease-in-out infinite alternate; transform-box:fill-box; transform-origin:center; }
@keyframes cpuGlow{ from{ opacity:.6; } to{ opacity:1; transform:scale(1.04); } }
.cpu-heat{ animation:cpuHeat 3.2s ease-in-out infinite alternate; }
@keyframes cpuHeat{ from{ opacity:.5; } to{ opacity:1; } }
.cpu-heatline{ stroke:#f0b429; stroke-width:2.4; stroke-dasharray:4 8; opacity:.85; animation:cpuRise 1.1s linear infinite; }
@keyframes cpuRise{ to{ stroke-dashoffset:-24; } }
.cpu-pipe{ stroke:#f0b429; stroke-width:2.4; stroke-dasharray:10 8; opacity:.5; animation:cpuFlow 1.6s linear infinite; }
@keyframes cpuFlow{ to{ stroke-dashoffset:-36; } }
.cpu-fan-blades{ animation:cpuSpin 5s linear infinite; transform-origin:778px 98px; }
@keyframes cpuSpin{ to{ transform:rotate(360deg); } }
.cpu-trace{ stroke:#24466f; stroke-width:2; }
.cpu-clockdot{ fill:#41e2f5; animation:cpuPulse 1.6s ease-in-out infinite; }
@keyframes cpuPulse{ 50%{ opacity:.25; } }
.cpu-block{ fill:#0e2038; stroke:#2e5f93; stroke-width:2; }
.cpu-pkg{ fill:#0d1e35; stroke:#2e5f93; stroke-width:2.5; }
.cpu-die{ fill:#122a48; stroke:#1e3a5f; stroke-width:1.5; }
.cpu-core{ fill:#1a3a63; stroke:#2e5f93; stroke-width:1.5; }
.cpu-core-hot{ fill:#7a5410; stroke:#f0b429; animation:cpuHot 2s ease-in-out infinite; }
@keyframes cpuHot{ 50%{ fill:#a3690f; } }
.cpu-tmax{ stroke:#f0705f; stroke-width:1.6; stroke-dasharray:6 5; opacity:.8; }
.cpu-tmax-label{ fill:#f0705f; font:600 10px var(--font-mono); letter-spacing:1.5px; }
.cpu-chip-label{ fill:#7f95b5; font:600 13px var(--font-mono); letter-spacing:3px; }
.cpu-label{ fill:#8aa3c4; font:500 11px var(--font-mono); letter-spacing:2px; }
.cpu-readout{ fill:#5f7ca3; font:500 11px var(--font-mono); }
.cpu-hex{ fill:#41e2f5; font:600 11px var(--font-mono); letter-spacing:1px; }
.cpu-led{ fill:#2fbf8f; animation:cpuLed 2.2s ease-in-out infinite; }
@keyframes cpuLed{ 50%{ opacity:.35; } }
.cpu-stable-label{ fill:#2fbf8f; font:600 10px var(--font-mono); letter-spacing:2px; }
.cpu-status{ fill:#5f7ca3; font:500 10px var(--font-mono); letter-spacing:1px; }

/* ---------- FAQ ---------- */
.cpu-faq{ margin-top:8px; }
.cpu-faq-item{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); margin-bottom:10px; transition:border-color .2s; }
.cpu-faq-item[open]{ border-color:var(--blue-soft); }
.cpu-faq-sum{ list-style:none; display:flex; align-items:center; gap:12px; cursor:pointer; padding:16px 18px; font-weight:600; font-size:.98rem; color:var(--ink); }
.cpu-faq-sum::-webkit-details-marker{ display:none; }
.cpu-faq-ico{ margin-left:auto; position:relative; width:14px; height:14px; flex:none; }
.cpu-faq-ico::before, .cpu-faq-ico::after{ content:""; position:absolute; left:0; top:6px; width:14px; height:2px; background:var(--ink-3); border-radius:1px; transition:transform .25s; }
.cpu-faq-ico::after{ transform:rotate(90deg); }
.cpu-faq-item[open] .cpu-faq-ico::after{ transform:rotate(0deg); }
.cpu-faq-panel{ display:grid; grid-template-rows:0fr; transition:grid-template-rows .3s ease; }
.cpu-faq-item[open] .cpu-faq-panel{ grid-template-rows:1fr; }
.cpu-faq-inner{ overflow:hidden; min-height:0; visibility:hidden; transition:visibility 0s .3s; }
.cpu-faq-item[open] .cpu-faq-inner{ visibility:visible; transition-delay:0s; }
.cpu-faq-inner p{ margin:0; padding:0 18px 18px; color:var(--ink-2); font-size:.95rem; line-height:1.7; }

/* ---------- Related ---------- */
.cpu-related{ display:grid; grid-template-columns:1fr; gap:12px; margin-top:8px; }
.cpu-related-card{ display:flex; flex-direction:column; gap:6px; padding:16px 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; }
.cpu-related-card:hover{ border-color:var(--blue); transform:translateY(-2px); box-shadow:var(--shadow-1); }
.cpu-related-title{ font-size:1rem; font-weight:600; margin:0; }
.cpu-related-sub{ font-size:.85rem; color:var(--ink-2); margin:0; }

.cpu-foot{ margin-top:56px; padding-top:18px; border-top:1px solid var(--line); }
.cpu-foot p{ font-size:.82rem; color:var(--ink-3); margin:0; }

/* ---------- Ad placeholder (self-hiding when empty) ---------- */
.ad-wrap{ padding:0 0 clamp(48px, 7vw, 72px); }
.ad-slot{ display:none; }
.ad-slot:not(:empty){ display:flex; align-items:center; justify-content:center; position:relative; min-height:250px; max-width:760px; margin-inline:auto; border:1px dashed var(--line-2); border-radius:var(--radius); background:var(--surface); 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:1000px){
  .cpu-grid{ grid-template-columns:230px minmax(0,1fr); gap:56px; }
  .cpu-toc{ display:block; position:sticky; top:calc(var(--header-h) + 24px); align-self:start; max-height:calc(100vh - var(--header-h) - 48px); overflow-y:auto; }
}
@media (min-width:560px){
  .cpu-idx-grid{ grid-template-columns:repeat(2, 1fr); }
  .cpu-tree-opts{ grid-template-columns:1fr 1fr; }
  .cpu-related{ grid-template-columns:repeat(2, 1fr); }
}
@media (max-width:559px){
  .cpu-cmd{ grid-template-columns:1fr; }
  .cpu-cmd-label{ min-width:0; padding-top:0; }
  .cpu-cmd-copy{ justify-self:start; }
  .cpu-idx-num{ min-width:0; }
}

/* ---------- Dark theme (applied when <html data-theme="dark">) ---------- */
[data-theme="dark"] .c-a{ color:#8fb8f7; background:#0f1e38; }
[data-theme="dark"] .c-b{ color:#f0b45f; background:#241a09; }
[data-theme="dark"] .c-c{ color:#f0938d; background:#2b1210; }
[data-theme="dark"] .c-d{ color:#57d6e6; background:#0a2226; }
[data-theme="dark"] .c-e{ color:#b79cf5; background:#171129; }
[data-theme="dark"] .c-f{ color:#5fd39a; background:#0d2419; }
[data-theme="dark"] .c-g{ color:#9fb0c8; background:#141c2b; }
[data-theme="dark"] .cpu-callout{ background:#12233d; }
[data-theme="dark"] .cpu-callout.cpu-note{ background:#0f2531; }
[data-theme="dark"] .cpu-callout.cpu-tip{ background:#0f2a22; }
[data-theme="dark"] .cpu-idx-card,
[data-theme="dark"] .cpu-sel-btn,
[data-theme="dark"] .cpu-tree-btn,
[data-theme="dark"] .cpu-faq-item,
[data-theme="dark"] .cpu-related-card,
[data-theme="dark"] .cpu-tree-rec,
[data-theme="dark"] .cpu-sel-panel{ background:var(--surface); }
[data-theme="dark"] .cpu-sel-btn[aria-pressed="true"],
[data-theme="dark"] .cpu-idx-btn[aria-pressed="true"]{ background:#2563e8; border-color:#2563e8; }
[data-theme="dark"] .cpu-cmd code{ background:#12233d; color:var(--ink); }
[data-theme="dark"] .cpu-check{ background:var(--surface); }
[data-theme="dark"] .cpu-check-list label:hover{ background:#14233a; }
[data-theme="dark"] .cpu-idx-btn[aria-pressed="true"]{ background:#2563e8; }
[data-theme="dark"] .cpu-cmd-copy{ color:#7fb3e8; border-color:#27466f; }
[data-theme="dark"] .cpu-cmd-copy:hover{ background:#2563e8; color:#fff; border-color:#2563e8; }
[data-theme="dark"] .cpu-topic h3{ border-left-color:#27466f; }
[data-theme="dark"] .cpu-sec-index{ color:#35507c; }
[data-theme="dark"] .cpu-progress{ background:rgba(255,255,255,.04); }
[data-theme="dark"] .cpu-figure{ background:var(--surface); border:1px solid var(--line); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  .cpu-glow, .cpu-heat, .cpu-heatline, .cpu-pipe, .cpu-fan-blades, .cpu-clockdot, .cpu-core-hot, .cpu-led{ animation:none; }
  .cpu-heatline, .cpu-pipe{ opacity:.5; }
  .cpu-faq-panel, .cpu-faq-inner, .cpu-faq-ico::before, .cpu-faq-ico::after{ transition-duration:0s; }
  .cpu-idx-card, .cpu-sel-btn, .cpu-tree-btn, .cpu-related-card{ transition-duration:0s; }
}

/* ---------- Print ---------- */
@media print{
  .cpu-progress, .cpu-tree, .cpu-sel, .cpu-check, .ad-wrap, .to-top, .toast, .consent, .nav-toggle, .theme-toggle, .topbar, .site-footer{ display:none !important; }
  .cpu-grid{ display:block; padding:0; }
  .cpu-toc{ display:none; }
  .cpu-article{ max-width:none; }
  .cpu-faq-panel{ grid-template-rows:1fr !important; }
  .cpu-faq-inner{ visibility:visible !important; }
  body{ background:#fff; color:#000; }
}