/* ============================================================
   DiagMyPCHub — Backup & Restore tutorial (pillar)
   Local stylesheet. Depends on the site design tokens from
   ../../css/style.css (loaded first in <head>). All tutorial
   styles are namespaced with the "bkp-" prefix.
   ============================================================ */

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

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

/* ---------- Article head ---------- */
.bkp-article{ max-width:820px; min-width:0; }
.bkp-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 16px; }
.bkp-meta{ display:flex; flex-wrap:wrap; align-items:center; gap:10px; margin:0 0 20px; }
.bkp-meta-item{ font:500 .72rem var(--font-mono); letter-spacing:.04em; color:var(--ink-3); border:1px solid var(--line-2); background:var(--surface); border-radius:999px; padding:4px 10px; }
.bkp-intro{ font-size:1.05rem; color:var(--ink-2); line-height:1.7; margin:0 0 16px; }

/* ---------- Strategy overview ---------- */
.bkp-overview{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:20px 22px; margin:28px 0 8px; box-shadow:var(--shadow-1); }
.bkp-overview h2{ font-size:1.05rem; font-weight:600; letter-spacing:-.01em; margin:0 0 14px; color:var(--ink); }
.bkp-overview ol{ list-style:none; counter-reset:bkp-ov; display:grid; grid-template-columns:1fr; gap:7px; margin:0; padding:0; }
.bkp-overview li{ counter-increment:bkp-ov; position:relative; padding-left:40px; font-size:.92rem; color:var(--ink-2); line-height:1.55; }
.bkp-overview li::before{ content:counter(bkp-ov, decimal-leading-zero); position:absolute; left:0; top:1px; width:28px; height:22px; display:grid; place-items:center; font:600 .7rem var(--font-mono); color:var(--blue-deep); background:var(--tint); border:1px solid var(--blue-soft); border-radius:7px; }

/* ---------- Image placeholders (hidden until a valid image exists) ----------
   Future images: save under images/ and set data-src on the <img>.
   The figure is display:none by default; JS adds .is-ready only
   when a non-empty data-src is present, and removes it on load error. */
.bkp-figure{ display:none; margin:16px 0 8px; }
.bkp-figure.is-ready{ display:block; }
.bkp-figure img{ width:100%; height:auto; border:1px solid var(--line); border-radius:var(--radius); background:var(--surface); display:block; }
.bkp-figure figcaption{ margin-top:10px; font:400 .78rem var(--font-mono); color:var(--ink-3); }

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

/* ---------- Tables ---------- */
.bkp-article .table-wrap{ overflow-x:auto; margin:0 0 20px; border:1px solid var(--line); border-radius:var(--radius); background:var(--surface); box-shadow:var(--shadow-1); }
.bkp-article table{ width:100%; border-collapse:collapse; font-size:.88rem; min-width:640px; }
.bkp-article caption{ text-align:left; padding:12px 16px 0; font:500 .72rem var(--font-mono); letter-spacing:.06em; color:var(--ink-3); }
.bkp-article thead th{ background:var(--tint); color:var(--ink); text-align:left; font:600 .78rem var(--font-display); letter-spacing:.02em; padding:12px 14px; border-bottom:1px solid var(--line); white-space:nowrap; }
.bkp-article tbody td{ padding:11px 14px; border-bottom:1px solid var(--line); color:var(--ink-2); vertical-align:top; line-height:1.55; }
.bkp-article tbody tr:last-child td{ border-bottom:0; }
.bkp-article tbody tr:hover{ background:rgba(15, 91, 215, 0.04); }
.bkp-article td strong, .bkp-article td em{ color:var(--ink); }

/* ---------- Ordered steps (with per-step image placeholders) ---------- */
.bkp-steps{ counter-reset:bkp-step; list-style:none; padding:0; margin:0 0 20px; display:grid; gap:18px; }
.bkp-steps > li{ counter-increment:bkp-step; position:relative; padding:0 0 6px 46px; margin:0; min-height:40px; }
.bkp-steps > li::before{ content:counter(bkp-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; }
.bkp-steps > li strong{ color:var(--ink); }

/* ---------- Warning / callouts ---------- */
.bkp-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; }
.bkp-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); }
.bkp-warn-title{ margin:0 0 6px; font-weight:600; font-size:.98rem; }
.bkp-warn-text{ margin:0; font-size:.92rem; color:#6b5320; }

.bkp-danger{ display:flex; gap:14px; align-items:flex-start; background:#fdecec; border:1px solid #f0b6b6; border-radius:var(--radius); padding:16px 18px; margin:28px 0; }
.bkp-danger-ico{ flex:none; width:24px; height:24px; display:grid; place-items:center; border-radius:50%; background:#d64545; color:#fff; font:700 .95rem/1 var(--font-display); }
.bkp-danger-title{ margin:0 0 6px; font-weight:600; font-size:.98rem; }
.bkp-danger-text{ margin:0; font-size:.92rem; color:#7a2e2e; }

.bkp-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); }
.bkp-callout p{ margin:0; }
.bkp-callout strong{ color:var(--ink); }
.bkp-callout.bkp-note{ border-left-color:var(--cyan); background:#eafaf7; }

/* ---------- Code blocks with copy button ---------- */
.bkp-block{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:14px 16px; margin:20px 0; }
.bkp-block-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:10px; flex-wrap:wrap; }
.bkp-block-label{ font-size:.68rem; text-transform:uppercase; letter-spacing:.08em; color:var(--ink-3); }
.bkp-code{ margin:0; background:var(--tint); border:1px solid var(--line); border-radius:8px; padding:14px 16px; overflow-x:auto; font:400 .8rem/1.7 var(--font-mono); color:var(--ink); white-space:pre; }
.bkp-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; }
.bkp-copy:hover{ background:var(--blue); color:#fff; border-color:var(--blue); }
.bkp-copy.is-done{ background:var(--ok); border-color:var(--ok); color:#06281c; }
.bkp-block-note{ margin:10px 0 0; font-size:.8rem; color:var(--ink-3); }

/* ---------- Decision aid (backup planner) ---------- */
.bkp-wiz{ background:var(--surface); border:1px solid var(--line); border-radius:14px; padding:20px; margin:28px 0; box-shadow:var(--shadow-1); }
.bkp-wiz-title{ font-size:1.1rem; font-weight:600; margin:0 0 4px; }
.bkp-wiz-hint{ font-size:.9rem; color:var(--ink-3); margin:0 0 18px; }
.bkp-wiz-q{ margin-bottom:18px; }
.bkp-wiz-q:last-of-type{ margin-bottom:0; }
.bkp-wiz-label{ display:block; font:500 .72rem var(--font-mono); text-transform:uppercase; letter-spacing:.1em; color:var(--ink-3); margin-bottom:8px; }
.bkp-wiz-grid{ display:grid; grid-template-columns:repeat(auto-fill, minmax(190px, 1fr)); gap:8px; }
.bkp-wiz-btn{ font:500 .86rem var(--font-body); color:var(--ink-2); background:var(--bg); border:1px solid var(--line-2); border-radius:10px; padding:10px 12px; cursor:pointer; text-align:left; transition:border-color .2s, color .2s, background .2s; }
.bkp-wiz-btn:hover{ border-color:var(--blue); color:var(--ink); }
.bkp-wiz-btn[aria-pressed="true"]{ background:var(--blue); border-color:var(--blue); color:#fff; }
.bkp-wiz-panel{ margin-top:18px; border:1px solid var(--line); border-left:3px solid var(--cyan); border-radius:var(--radius); background:var(--bg); padding:18px 20px; }
.bkp-wiz-panel h3{ font-size:1rem; font-weight:600; margin:0 0 8px; color:var(--ink); }
.bkp-wiz-panel p{ margin:0 0 10px; font-size:.94rem; color:var(--ink-2); line-height:1.7; }
.bkp-wiz-panel ul{ list-style:none; padding:0; margin:8px 0 0; display:grid; gap:8px; }
.bkp-wiz-panel a{ font-size:.92rem; }

/* ---------- 25-tutorial collection index ---------- */
.bkp-index{ margin-top:24px; }
.bkp-index-toolbar{ background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:16px; display:grid; gap:12px; margin-bottom:18px; }
.bkp-index-search input{ width:100%; box-sizing:border-box; background:var(--bg); border:1.5px solid var(--line-2); border-radius:10px; padding:11px 14px; font:400 .95rem var(--font-body); color:var(--ink); }
.bkp-index-search input::placeholder{ color:var(--ink-3); }
.bkp-index-search input:focus{ outline:none; border-color:var(--blue); box-shadow:0 0 0 4px rgba(15, 91, 215, 0.12); }
.bkp-index-chips{ display:flex; flex-wrap:wrap; gap:8px; }
.bkp-index-count{ font:500 .74rem var(--font-mono); color:var(--ink-3); margin:0; }
.bkp-inline-reset{ font:inherit; font-size:.92rem; color:var(--blue); background:none; border:0; padding:0; cursor:pointer; text-decoration:underline; text-underline-offset:2px; }
.bkp-index-grid{ display:grid; grid-template-columns:1fr; gap:14px; }
.bkp-tut-card{ display:flex; flex-direction:column; gap:8px; 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; }
a.bkp-tut-card:hover, a.bkp-tut-card:focus-visible{ border-color:var(--blue); transform:translateY(-3px); box-shadow:var(--shadow-1); color:var(--ink); }
.bkp-tut-top{ display:flex; flex-wrap:wrap; align-items:center; gap:8px; }
.bkp-tut-num{ font:600 .72rem var(--font-mono); color:var(--ink-3); margin-right:auto; }
.tag-bkp-cat{ background:var(--tint); border-color:var(--blue-soft); }
.tag-bkp-lvl{ background:#f4f8fd; border-color:var(--line-2); color:var(--ink-2); }
.tag-bkp-lvl[data-level="Beginner"]{ color:#1c7a56; background:#e9f7f0; border-color:#bfe6d4; }
.tag-bkp-lvl[data-level="Advanced"]{ color:#8a5a12; background:#fdf3e3; border-color:#ecd3a4; }
.tag-bkp-live{ color:#fff; background:var(--blue); border-color:var(--blue); }
.bkp-tut-title{ font-size:.98rem; font-weight:600; line-height:1.35; margin:0; }
.bkp-tut-desc{ font-size:.85rem; color:var(--ink-2); margin:0; line-height:1.6; }
.bkp-index-empty{ background:var(--surface); border:1px dashed var(--line-2); border-radius:var(--radius); padding:22px; text-align:center; color:var(--ink-2); font-size:.92rem; margin:0; }

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

/* ---------- Animated SVG circuit diagram ---------- */
.bkp-diagram{ margin:32px 0; background:var(--dark-2); border:1px solid var(--dark-line); border-radius:14px; padding:clamp(8px, 2vw, 18px); }
.bkp-diagram svg{ width:100%; height:auto; display:block; max-width:100%; }

.bkp-glow{ animation:bkpGlow 7s ease-in-out infinite alternate; transform-box:fill-box; transform-origin:center; }
@keyframes bkpGlow{ from{ opacity:.6; } to{ opacity:1; transform:scale(1.04); } }

.bkp-panel{ fill:#0b1a30; stroke:#2e5f93; stroke-width:1.5; }
.bkp-node{ fill:#0e2038; stroke:#2e5f93; stroke-width:1.5; }
.bkp-core{ fill:var(--cyan-bright); animation:bkpCore 2.6s ease-in-out infinite; transform-box:fill-box; transform-origin:center; }
@keyframes bkpCore{ 50%{ transform:scale(1.3); opacity:.75; } }

.bkp-ring{ fill:none; stroke:#24466f; stroke-width:1.5; }
.bkp-ring-on{ fill:none; stroke:var(--cyan-bright); stroke-width:1.5; animation:bkpRing 3s ease-in-out infinite; transform-box:fill-box; transform-origin:center; }
@keyframes bkpRing{ 0%,100%{ opacity:.25; } 50%{ opacity:.9; } }

.bkp-trace{ stroke:#24466f; stroke-width:2; fill:none; }
.bkp-flow{ stroke:var(--cyan-bright); stroke-width:2.4; fill:none; stroke-dasharray:14 238; opacity:.85; animation:bkpFlow 4s linear infinite; }
@keyframes bkpFlow{ to{ stroke-dashoffset:-252; } }
.bkp-f1{ animation-duration:3.2s; }
.bkp-f2{ animation-duration:4.4s; animation-delay:.5s; }
.bkp-f3{ animation-duration:4.8s; animation-delay:1.1s; }

.bkp-led{ fill:var(--ok); opacity:.9; }
.bkp-shield{ fill:#0e2038; stroke:var(--cyan-bright); stroke-width:1.5; }
.bkp-pulse{ fill:none; stroke:var(--cyan-bright); stroke-width:1.5; opacity:0; transform-box:fill-box; transform-origin:center; animation:bkpPulse 4.8s ease-out infinite; }
.bkp-p1{ animation-delay:0s; }
.bkp-p2{ animation-delay:.8s; }
.bkp-p3{ animation-delay:1.6s; }
.bkp-p4{ animation-delay:2.4s; }
@keyframes bkpPulse{ 0%{ transform:scale(.6); opacity:.7; } 18%{ transform:scale(2); opacity:0; } 100%{ opacity:0; } }

.bkp-label{ fill:#8aa3c4; font:600 12px var(--font-mono); letter-spacing:1.5px; }
.bkp-sublabel{ fill:#5b7396; font:500 10px var(--font-mono); letter-spacing:1.5px; }
.bkp-status{ fill:#5b7396; font:500 12px var(--font-mono); letter-spacing:.5px; }

/* ---------- Related cards ---------- */
.bkp-related{ display:grid; grid-template-columns:1fr; gap:14px; margin-top:8px; }
.bkp-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; }
.bkp-related-card:hover, .bkp-related-card:focus-visible{ border-color:var(--blue); transform:translateY(-3px); box-shadow:var(--shadow-1); }
.bkp-related-title{ font-size:1.02rem; font-weight:600; margin:0; }
.bkp-related-sub{ font-size:.86rem; color:var(--ink-2); margin:0; }

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

/* ---------- Responsive ---------- */
@media (min-width:560px){
  .bkp-related{ grid-template-columns:1fr 1fr; }
  .bkp-index-grid{ grid-template-columns:1fr 1fr; }
}
@media (min-width:1000px){
  .bkp-grid{ grid-template-columns:230px minmax(0,1fr); gap:56px; }
  .bkp-toc{ display:block; position:sticky; top:calc(var(--header-h) + 24px); align-self:start; max-height:calc(100vh - var(--header-h) - 48px); overflow:auto; }
  .bkp-overview ol{ grid-template-columns:1fr 1fr; gap:7px 26px; }
}
@media (max-width:559px){
  .bkp-wiz-grid{ grid-template-columns:1fr; }
  .bkp-steps > li{ padding-left:42px; }
}

/* ---------- Dark theme (local hardcoded colors only) ---------- */
[data-theme="dark"] .bkp-warn{ background:#241a09; border-color:#5a4417; }
[data-theme="dark"] .bkp-warn-text{ color:#d8b878; }
[data-theme="dark"] .bkp-danger{ background:#2a1414; border-color:#6b2a2a; }
[data-theme="dark"] .bkp-danger-text{ color:#e09a9a; }
[data-theme="dark"] .bkp-callout.bkp-note{ background:#0a2226; }
[data-theme="dark"] .bkp-steps > li::before{ background:var(--tint); color:var(--blue); border-color:var(--blue-soft); }
[data-theme="dark"] .bkp-check-list label:hover{ background:#14233a; }
[data-theme="dark"] .bkp-wiz-btn{ background:var(--bg); }
[data-theme="dark"] .tag-bkp-lvl{ background:#0f1c30; border-color:#1e3049; color:var(--ink-2); }
[data-theme="dark"] .tag-bkp-lvl[data-level="Beginner"]{ color:#3ddc97; background:#0f2419; border-color:#2a5c42; }
[data-theme="dark"] .tag-bkp-lvl[data-level="Advanced"]{ color:#f5b453; background:#2a2110; border-color:#6b5426; }
[data-theme="dark"] .bkp-article tbody tr:hover{ background:#14233a; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  .bkp-progress{ display:none; }
  .bkp-glow, .bkp-core, .bkp-flow, .bkp-pulse, .bkp-ring-on{ animation:none !important; }
  .bkp-flow{ stroke-dasharray:none; opacity:.35; }
  .bkp-pulse{ display:none; }
  .bkp-ring-on{ opacity:.6; }
}

/* ---------- Print ---------- */
@media print{
  .bkp-progress, .bkp-toc, .to-top, .site-header, .topbar, .ad-wrap, .bkp-check-actions, .bkp-wiz, .bkp-index-toolbar, .site-footer, .consent{ display:none !important; }
  .bkp-grid{ display:block; padding:0; }
  .bkp-article{ max-width:100%; }
  a{ color:var(--ink); text-decoration:none; }
  .bkp-sec{ page-break-inside:avoid; }
}