/* ============================================================
   DiagMyPCHub — RAID Controllers tutorial hub
   Local stylesheet. Depends on the site design tokens from
   ../../css/style.css (loaded first in <head>). All page
   styles are namespaced with the "raid-" prefix.
   ============================================================ */

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

/* ---------- Grid: TOC + article ---------- */
.raid-grid{ display:grid; grid-template-columns:1fr; gap:40px; padding-top:clamp(32px,5vw,56px); padding-bottom:clamp(56px,8vw,96px); }
.raid-toc{ display:none; }
.raid-toc-title{ font:500 .7rem var(--font-mono); text-transform:uppercase; letter-spacing:.14em; color:var(--ink-3); margin:0 0 12px; }
.raid-toc-group{ margin:14px 0 4px; }
.raid-toc-group:first-of-type{ margin-top:0; }
.raid-toc-group a{ font:500 .74rem var(--font-mono); color:var(--ink-2); text-decoration:none; transition:color .2s; }
.raid-toc-group a:hover{ color:var(--blue); }
.raid-toc ul{ display:grid; gap:1px; border-left:1px solid var(--line); }
.raid-toc li a{ display:block; padding:5px 14px; margin-left:-1px; border-left:2px solid transparent; color:var(--ink-2); text-decoration:none; font-size:.83rem; line-height:1.4; transition:color .2s, border-color .2s; }
.raid-toc li a:hover{ color:var(--ink); }
.raid-toc li a[aria-current="true"]{ color:var(--blue); border-left-color:var(--blue); font-weight:500; }

/* ---------- Article head ---------- */
.raid-article{ max-width:820px; }
.raid-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; }
.raid-intro{ font-size:1.05rem; color:var(--ink-2); line-height:1.7; margin:0 0 16px; }
.raid-article p{ color:var(--ink-2); line-height:1.75; margin:0 0 16px; }
.raid-article p strong, .raid-article p em{ color:var(--ink); }
.raid-article a{ color:var(--blue); text-decoration:underline; text-underline-offset:2px; text-decoration-color:var(--blue-soft); transition:text-decoration-color .2s; }
.raid-article a:hover{ text-decoration-color:var(--blue); }

/* ---------- Learning overview ---------- */
.raid-overview{ margin:32px 0 8px; }
.raid-ov-title{ font-size:1.15rem; font-weight:600; margin:0 0 14px; }
.raid-overview-grid{ display:grid; grid-template-columns:1fr; gap:10px; }
.raid-ov-card{ display:flex; align-items:flex-start; gap:12px; padding:14px; 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; }
.raid-ov-card:hover, .raid-ov-card:focus-visible{ border-color:var(--blue); transform:translateY(-2px); box-shadow:var(--shadow-1); }
.raid-ov-letter{ flex:none; width:30px; height:30px; display:grid; place-items:center; font:700 .95rem var(--font-display); border-radius:8px; margin-top:2px; }
.raid-ov-body{ flex:1; min-width:0; display:grid; gap:2px; }
.raid-ov-name{ font-weight:600; font-size:.95rem; }
.raid-ov-desc{ font-size:.82rem; color:var(--ink-2); line-height:1.45; }
.raid-ov-count{ flex:none; font:500 .68rem var(--font-mono); color:var(--ink-3); margin-top:3px; }

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

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

.rd-box{ fill:#0e2038; stroke:#2e5f93; stroke-width:1.5; }
.rd-chip{ fill:#12314f; stroke:#24466f; stroke-width:1.5; }
.rd-cache{ fill:#12314f; stroke:#f0b429; stroke-width:1.5; opacity:.9; }
.rd-mode{ fill:#0e2038; stroke:#2e5f93; stroke-width:1.5; stroke-dasharray:4 4; }
.rd-platter{ fill:#12314f; stroke:#2e5f93; stroke-width:1.5; }

.rd-pcie{ stroke:#f0b429; stroke-width:2.4; stroke-dasharray:6 10; animation:rdFlow 1.6s linear infinite; }
.rd-bus{ stroke:#24466f; stroke-width:2; stroke-dasharray:6 10; animation:rdFlow 2s linear infinite; }
.rd-bus:nth-of-type(2){ animation-delay:.3s; }
.rd-bus:nth-of-type(3){ animation-delay:.6s; }
@keyframes rdFlow{ to{ stroke-dashoffset:-32; } }

.rd-led{ fill:var(--ok); transform-box:fill-box; transform-origin:center; animation:rdLed 3s ease-in-out infinite; }
@keyframes rdLed{ 50%{ transform:scale(1.35); opacity:.7; } }
.rd-stable{ fill:#8aa3c4; font:600 11px var(--font-mono); letter-spacing:2px; }
.rd-label{ fill:#8aa3c4; font:600 12px var(--font-mono); letter-spacing:1.5px; }
.rd-sub{ fill:#5b7396; font:500 10px var(--font-mono); letter-spacing:.5px; }
.rd-status{ fill:#5b7396; font:500 12px var(--font-mono); letter-spacing:1px; }

/* ---------- Search + filter controls ---------- */
.raid-controls{ margin:28px 0 8px; border:1px solid var(--line); border-radius:var(--radius); background:var(--surface); padding:16px; }
.raid-search-wrap{ display:flex; align-items:center; gap:8px; margin-bottom:12px; }
.raid-search-input{ flex:1; min-width:0; border:1.5px solid var(--line-2); border-radius:10px; background:var(--bg); padding:10px 14px; font:400 .95rem var(--font-body); color:var(--ink); transition:border-color .2s, box-shadow .2s; }
.raid-search-input:focus{ outline:none; border-color:var(--blue); box-shadow:0 0 0 4px rgba(15,91,215,.12); }
.raid-search-input::placeholder{ color:var(--ink-3); }
.raid-clear{ flex:none; font:500 .78rem var(--font-mono); color:var(--ink-2); background:none; border:1px solid var(--line-2); border-radius:8px; padding:7px 12px; cursor:pointer; transition:color .2s, border-color .2s; }
.raid-clear:hover{ color:var(--blue); border-color:var(--blue); }
.raid-filters{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:10px; }
.raid-fbtn{ font:500 .8rem var(--font-mono); color:var(--ink-2); background:var(--bg); border:1px solid var(--line-2); border-radius:999px; padding:8px 14px; cursor:pointer; transition:border-color .2s, color .2s, background .2s; }
.raid-fbtn:hover{ border-color:var(--blue); color:var(--blue); }
.raid-fbtn[aria-pressed="true"]{ background:var(--blue); border-color:var(--blue); color:#fff; }
.raid-count{ font:500 .78rem var(--font-mono); color:var(--ink-3); margin:0 0 4px; min-height:1.2em; }
.raid-empty{ border-top:1px dashed var(--line-2); margin-top:10px; padding-top:14px; }
.raid-empty p{ margin:0 0 10px; font-size:.92rem; color:var(--ink-2); }
.raid-empty[hidden]{ display:none; }

/* ---------- Category blocks ---------- */
.raid-cat{ margin-top:clamp(48px, 7vw, 72px); scroll-margin-top:calc(var(--header-h) + 16px); }
.raid-cat.is-hidden{ display:none; }
.raid-cat-head{ display:flex; align-items:flex-start; gap:16px; margin-bottom:20px; }
.raid-cat-letter{ flex:none; width:38px; height:38px; display:grid; place-items:center; font:700 1.1rem var(--font-display); border-radius:10px; }
.raid-cat-kicker{ font:500 .7rem var(--font-mono); text-transform:uppercase; letter-spacing:.16em; color:var(--blue); margin:2px 0 4px; }
.raid-cat-head h2{ font-size:clamp(1.3rem, 1rem + 1.2vw, 1.7rem); font-weight:600; letter-spacing:-.01em; margin:0; }

/* ---------- Tutorials ---------- */
.raid-tut{ margin-top:36px; scroll-margin-top:calc(var(--header-h) + 16px); }
.raid-tut.is-hidden{ display:none; }
.raid-tut h3{ font-size:1.2rem; font-weight:600; margin:0 0 14px; display:flex; align-items:baseline; gap:12px; line-height:1.3; }
.raid-tut-num{ flex:none; font:600 .72rem var(--font-mono); border-radius:7px; padding:4px 8px; letter-spacing:.04em; }

/* ---------- Image placeholders (two-state) ----------
   Planning state (default): img hidden, .raid-ph panel shown.
   Image-ready state (.has-img): img shown, .raid-ph hidden.
   JS toggles .has-img from data-src + load/error events. */
.raid-fig{ margin:22px 0; }
.raid-fig img{ display:none; width:100%; height:auto; border:1px solid var(--line); border-radius:var(--radius); background:var(--surface); }
.raid-fig.has-img img{ display:block; }
.raid-fig.has-img .raid-ph{ display:none; }
.raid-ph{ border:1.5px dashed var(--line-2); border-radius:var(--radius); background:var(--tint); padding:18px 20px; }
.raid-ph-label{ display:inline-block; font:600 .64rem var(--font-mono); text-transform:uppercase; letter-spacing:.12em; color:var(--blue-deep); background:var(--surface); border:1px solid var(--blue-soft); border-radius:999px; padding:4px 10px; margin-bottom:10px; }
.raid-ph-title{ font-weight:600; font-size:.95rem; color:var(--ink); margin:0 0 6px; }
.raid-ph-desc{ font-size:.84rem; color:var(--ink-2); margin:0; line-height:1.55; }
.raid-ph-desc code{ font:500 .8rem var(--font-mono); background:var(--surface); border:1px solid var(--line); border-radius:5px; padding:1px 5px; }
.raid-figcap{ margin-top:10px; font:400 .78rem var(--font-mono); color:var(--ink-3); }

/* ---------- Warning / callouts ---------- */
.raid-warn{ display:flex; gap:14px; align-items:flex-start; background:#fdf3e6; border:1px solid #f0d6a8; border-radius:var(--radius); padding:16px 18px; margin:22px 0; }
.raid-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); }
.raid-warn-title{ margin:0 0 6px; font-weight:600; font-size:.98rem; color:var(--ink); }
.raid-warn-text{ margin:0; font-size:.92rem; color:#6b5320; line-height:1.65; }

.raid-callout{ border-left:3px solid var(--cyan); background:var(--tint); border-radius:0 var(--radius) var(--radius) 0; padding:16px 20px; margin:24px 0; }
.raid-callout p{ margin:0; font-size:.95rem; color:var(--ink-2); line-height:1.7; }
.raid-callout strong{ color:var(--ink); }

/* ---------- Copyable blocks ---------- */
.raid-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:16px 0; }
.raid-cmd-label{ font:500 .68rem var(--font-mono); text-transform:uppercase; letter-spacing:.08em; color:var(--ink-3); min-width:88px; padding-top:6px; }
.raid-cmd code{ font:400 .84rem/1.6 var(--font-mono); color:var(--ink); background:var(--tint); border-radius:6px; padding:8px 12px; overflow-x:auto; white-space:pre; align-self:stretch; }
.raid-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; }
.raid-cmd-copy:hover{ background:var(--blue); color:#fff; border-color:var(--blue); }
.raid-cmd-copy.is-done{ background:var(--ok); border-color:var(--ok); color:#06281c; }
.raid-cmd-note{ grid-column:1 / -1; margin:2px 0 0; font-size:.8rem; color:var(--ink-3); line-height:1.55; }

/* ---------- 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%; }

/* ---------- Related cards ---------- */
.raid-related-wrap{ margin-top:clamp(48px, 7vw, 72px); }
.raid-related-wrap > p{ color:var(--ink-2); }
.raid-related{ display:grid; grid-template-columns:1fr; gap:14px; margin-top:8px; }
.raid-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; }
.raid-related-card:hover, .raid-related-card:focus-visible{ border-color:var(--blue); transform:translateY(-3px); box-shadow:var(--shadow-1); }
.raid-related-title{ font-size:1.02rem; font-weight:600; margin:0; }
.raid-related-sub{ font-size:.86rem; color:var(--ink-2); margin:0; line-height:1.5; }

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

/* ---------- Category colors ---------- */
.c-a{ color:#1d4fb8; background:#eaf2fd; }
.c-b{ color:#0b7f8c; background:#eafaf7; }
.c-c{ color:#5b3fb0; background:#f1ecfd; }
.c-d{ color:#8a5a12; background:#fdf3e6; }
.c-e{ color:#1f7a4d; background:#eafaf1; }
.c-f{ color:#a03d37; background:#fdecea; }

/* ---------- Responsive ---------- */
@media (min-width:560px){
  .raid-overview-grid{ grid-template-columns:1fr 1fr; }
  .raid-related{ grid-template-columns:1fr 1fr; }
}
@media (min-width:1000px){
  .raid-grid{ grid-template-columns:230px minmax(0,1fr); gap:56px; }
  .raid-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){
  .raid-cmd{ grid-template-columns:1fr; }
  .raid-cmd-label{ min-width:0; }
  .raid-overview-grid{ grid-template-columns:1fr; }
  .raid-tut h3{ flex-wrap:wrap; }
}

/* ---------- Dark theme ---------- */
[data-theme="dark"] .raid-warn{ background:#241a09; border-color:#5a4417; }
[data-theme="dark"] .raid-warn-text{ color:#d8b878; }
[data-theme="dark"] .raid-callout{ background:#0a2226; }
[data-theme="dark"] .raid-cmd code{ background:var(--tint); }
[data-theme="dark"] .raid-ph{ background:var(--tint); }
[data-theme="dark"] .raid-ph-label{ color:var(--blue); background:var(--dark-2); border-color:var(--blue-soft); }
[data-theme="dark"] .raid-ph-desc code{ background:var(--dark-2); border-color:var(--dark-line); }
[data-theme="dark"] .c-a{ color:#8fb8f7; background:#0f1e38; }
[data-theme="dark"] .c-b{ color:#57d6e6; background:#0a2226; }
[data-theme="dark"] .c-c{ color:#b79cf5; background:#171129; }
[data-theme="dark"] .c-d{ color:#f0b45f; background:#241a09; }
[data-theme="dark"] .c-e{ color:#5fd39a; background:#0d2419; }
[data-theme="dark"] .c-f{ color:#f0938d; background:#2b1210; }
[data-theme="dark"] .raid-ov-card:hover, [data-theme="dark"] .raid-related-card:hover{ box-shadow:var(--shadow-1); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  .raid-progress{ display:none; }
  .rd-glow, .rd-pcie, .rd-bus, .rd-led{ animation:none !important; }
  .rd-pcie, .rd-bus{ stroke-dasharray:none; opacity:.6; }
  .raid-ov-card, .raid-related-card, .raid-fbtn, .raid-clear{ transition:none; }
}

/* ---------- Print ---------- */
@media print{
  .raid-progress, .raid-toc, .to-top, .site-header, .topbar, .raid-diagram, .ad-wrap, .raid-controls, .site-footer, .consent{ display:none !important; }
  .raid-grid{ display:block; padding:0; }
  .raid-article{ max-width:100%; }
  .raid-tut, .raid-cat{ page-break-inside:avoid; }
  .raid-ph{ border-style:solid; }
  a{ color:var(--ink); text-decoration:none; }
}