/* ==========================================================================
   pdVerse Signoff Academy — Redesigned Styles
   Premium technical-book academy catalogue
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  --sa-ink:#111814;
  --sa-body:#374137;
  --sa-muted:#5a6a60;
  --sa-green:#146c4b;
  --sa-green-dark:#0d5438;
  --sa-green-light:#e6f2eb;
  --sa-charcoal:#1c2420;
  --sa-paper:#f8f6f0;
  --sa-white:#ffffff;
  --sa-line:#d5dad4;
  --sa-line-light:#e8ebe5;
  --sa-shadow-sm:0 2px 8px rgba(23,33,29,.06);
  --sa-shadow:0 6px 24px rgba(23,33,29,.08);
  --sa-shadow-lg:0 16px 40px rgba(23,33,29,.12);
  --sa-radius:10px;
}

/* ---------- Base Reset for Academy ---------- */
html { scroll-padding-top:82px; }
body[data-topic="academy"] { margin:0; overflow-x:hidden; background:var(--sa-paper); color:var(--sa-ink); }
body[data-topic="academy"] h1,body[data-topic="academy"] h2,body[data-topic="academy"] h3 { color:var(--sa-ink); }
body[data-topic="academy"] p { color:var(--sa-body); }

/* ---------- Skip Link ---------- */
.ps-skip-link { position:fixed; top:8px; left:8px; z-index:4000; padding:11px 15px; border-radius:6px; background:#fff; color:var(--sa-ink); font-weight:800; text-decoration:none; box-shadow:var(--sa-shadow-lg); transform:translateY(-150%); }
.ps-skip-link:focus { transform:translateY(0); }

/* ---------- Header (inherits base .ps-header / .ps-nav styling) ---------- */
.ps-nav { min-width:0; }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.sa-hero { padding:50px 0 0; border-bottom:1px solid var(--sa-line); background:var(--sa-paper); }
.sa-hero-grid { display:grid; grid-template-columns:minmax(0,1.05fr) minmax(380px,.95fr); gap:48px; align-items:center; }
.sa-hero-copy { min-width:0; padding-bottom:40px; }
.sa-hero .ps-breadcrumbs { margin-bottom:18px; }
.sa-hero .ps-eyebrow { color:var(--sa-green-dark); font-size:11px; font-weight:800; letter-spacing:.1em; text-transform:uppercase; }
.sa-hero h1 { max-width:700px; margin-top:10px; font-size:clamp(2.4rem,4.8vw,4.2rem); line-height:1.0; letter-spacing:-.045em; }
.sa-hero-lead { max-width:680px; margin:18px 0 0; color:var(--sa-body); font-size:clamp(.95rem,1.4vw,1.1rem); line-height:1.65; }
.sa-hero .ps-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:24px; }
.sa-hero .ps-button { min-height:48px; }

/* Primary button overrides */
body[data-topic="academy"] .ps-button-primary { border-color:var(--sa-green); background:var(--sa-green); color:#fff; box-shadow:0 6px 16px rgba(20,108,75,.2); }
body[data-topic="academy"] .ps-button-primary:hover { border-color:var(--sa-green-dark); background:var(--sa-green-dark); box-shadow:0 8px 20px rgba(20,108,75,.28); }
body[data-topic="academy"] .ps-button-ghost { border-color:#b5beb8; background:#fff; color:var(--sa-ink); }
body[data-topic="academy"] .ps-button-ghost:hover { border-color:var(--sa-green); color:var(--sa-green-dark); }

.sa-source-note { margin:14px 0 0; color:var(--sa-muted); font-size:12px; }
.sa-source-note strong { color:var(--sa-ink); }

/* ---------- Hero 3D Book Stack ---------- */
.sa-hero-visual { position:relative; min-width:0; height:380px; display:flex; align-items:center; justify-content:center; }
.sa-stack-scene { position:relative; width:320px; height:350px; perspective:900px; }
.sa-stack-book { position:absolute; border-radius:6px; overflow:hidden; box-shadow:0 12px 32px rgba(0,0,0,.18), 0 2px 6px rgba(0,0,0,.12); border:4px solid #fff; background:var(--sa-charcoal); transition:transform .25s ease; }
.sa-stack-book:hover { transform:translateY(-4px) !important; }
.sa-stack-picture { display:block; width:100%; height:100%; }
.sa-stack-picture img { display:block; width:100%; height:100%; object-fit:contain; }

/* Book positions — fanned stack */
.sa-stack-0 { width:160px; height:220px; left:12px; top:80px; transform:rotate(-8deg); z-index:1; }
.sa-stack-1 { width:175px; height:240px; left:48px; top:50px; transform:rotate(-3deg); z-index:2; }
.sa-stack-2 { width:175px; height:240px; left:80px; top:30px; transform:rotate(1deg); z-index:3; }
.sa-stack-3 { width:165px; height:228px; left:115px; top:55px; transform:rotate(5deg); z-index:4; }
.sa-stack-4 { width:155px; height:215px; left:140px; top:85px; transform:rotate(9deg); z-index:5; }
.sa-stack-5 { width:145px; height:200px; left:162px; top:115px; transform:rotate(13deg); z-index:6; }
.sa-stack-6 { width:130px; height:182px; left:180px; top:145px; transform:rotate(17deg); z-index:7; }

/* Shelf reflection effect */
.sa-stack-scene::after { content:''; position:absolute; bottom:0; left:5%; right:5%; height:18px; background:linear-gradient(180deg,rgba(23,33,29,.06),transparent); border-radius:50%; }

/* ---------- Credibility Metrics Strip ---------- */
.sa-metric-strip { display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid var(--sa-line); background:#fff; margin-top:8px; }
.sa-metric { min-width:0; padding:18px 22px; border-left:1px solid var(--sa-line); }
.sa-metric:first-child { border-left:none; }
.sa-metric strong { display:block; color:var(--sa-green-dark); font:800 1.4rem/1 Outfit,sans-serif; }
.sa-metric span { display:block; margin-top:5px; color:#4f5e56; font-size:11.5px; font-weight:650; }

/* ==========================================================================
   Bundle Offer Panel — Compact, below hero
   ========================================================================== */
.sa-bundle-panel { padding:28px 0; background:#eeece5; border-bottom:1px solid var(--sa-line); }
.sa-bundle-offer { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:14px 32px; align-items:center; padding:22px 26px; border:1px solid #333d36; border-left:5px solid var(--sa-green); background:var(--sa-charcoal); color:#e8f0eb; box-shadow:var(--sa-shadow); border-radius:var(--sa-radius); }
.sa-bundle-kicker { margin:0 0 4px; color:#7bd4a5; font-size:10px; font-weight:850; letter-spacing:.11em; text-transform:uppercase; }
.sa-bundle-offer h2 { margin:0; color:#fff !important; font-size:clamp(1.2rem,2.4vw,1.8rem); line-height:1.18; }
.sa-bundle-facts { display:flex; flex-wrap:wrap; gap:6px 16px; margin-top:10px; color:#c5d4ca; font-size:11.5px; }
.sa-bundle-facts span { position:relative; }
.sa-bundle-facts span+span::before { margin-right:16px; color:#5a6e61; content:"\2022"; }
.sa-bundle-facts strong { color:#fff; }
.sa-bundle-facts del { color:#a8b8ae; }
.sa-save-badge { background:rgba(20,108,75,.25); padding:2px 8px; border-radius:4px; }
.sa-save-badge strong { color:#7bd4a5 !important; }
.sa-bundle-button { min-width:220px; min-height:50px; border-color:var(--sa-green) !important; background:var(--sa-green) !important; color:#fff !important; font-weight:850 !important; box-shadow:0 8px 20px rgba(0,0,0,.2); border-radius:8px; }
.sa-bundle-button:hover { background:var(--sa-green-dark) !important; border-color:var(--sa-green-dark) !important; }
.sa-bundle-note { margin:6px 0 0; color:#92a599; font-size:11px; }
.sa-bundle-action { text-align:right; }

/* ==========================================================================
   Guide Library
   ========================================================================== */
.sa-library { padding:60px 0 72px; }
.sa-library-header { display:flex; align-items:end; justify-content:space-between; gap:28px; margin-bottom:22px; }
.sa-library-header h2 { margin-top:6px; font-size:clamp(1.6rem,3.2vw,2.5rem); }
.sa-library-desc { max-width:580px; margin:8px 0 0; color:var(--sa-muted); font-size:14px; line-height:1.55; }
.sa-result-count { flex:0 0 auto; padding:6px 10px; border:1px solid var(--sa-line); background:#fff; color:#405048 !important; font-size:11px !important; font-weight:750; border-radius:5px; white-space:nowrap; }

/* ---------- Sticky Filter Bar ---------- */
.sa-filter-wrap { position:sticky; top:70px; z-index:20; margin:0 0 24px; padding:10px 0; background:rgba(248,246,240,.95); backdrop-filter:blur(8px); }
.sa-filters { display:flex; gap:6px; overflow-x:auto; padding:2px 1px 6px; scrollbar-width:thin; -webkit-overflow-scrolling:touch; }
.sa-filters button { min-height:44px; flex:0 0 auto; padding:8px 14px; border:1px solid #bcc4bc; border-radius:6px; background:#fff; color:#2a3830; font:700 12px/1 Inter,sans-serif; cursor:pointer; transition:border-color .15s,color .15s; white-space:nowrap; }
.sa-filters button:hover { border-color:var(--sa-green); color:var(--sa-green-dark); }
.sa-filters button[aria-pressed="true"] { border-color:var(--sa-green-dark); background:var(--sa-green-dark); color:#fff; }

/* ---------- Guide Card Grid ---------- */
.sa-guide-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:20px; align-items:stretch; }

/* ---------- Guide Card ---------- */
.sa-guide-card { --topic-accent:var(--sa-green); min-width:0; display:flex; flex-direction:column; overflow:hidden; border:1px solid var(--sa-line); border-top:3px solid var(--topic-accent); border-radius:var(--sa-radius); background:#fff; box-shadow:var(--sa-shadow-sm); transition:transform .16s ease,box-shadow .16s ease; }
.sa-guide-card:hover { transform:translateY(-3px); box-shadow:var(--sa-shadow-lg); }
.sa-guide-card[hidden] { display:none; }

/* Topic accent colors */
.sa-guide-card[data-accent="drc"]      { --topic-accent:#6543a5; }
.sa-guide-card[data-accent="lvs"]      { --topic-accent:#1769a8; }
.sa-guide-card[data-accent="antenna"]  { --topic-accent:#a5263d; }
.sa-guide-card[data-accent="fill"]     { --topic-accent:#158598; }
.sa-guide-card[data-accent="erc"]      { --topic-accent:#0d6664; }
.sa-guide-card[data-accent="clp"]      { --topic-accent:#15824f; }
.sa-guide-card[data-accent="power"]    { --topic-accent:#4a6a12; }
.sa-guide-card[data-accent="package"]  { --topic-accent:#0d7b83; }
.sa-guide-card[data-accent="rcx"]      { --topic-accent:#a84e20; }
.sa-guide-card[data-accent="sta"]      { --topic-accent:#87502d; }
.sa-guide-card[data-accent="mmmc"]     { --topic-accent:#7c253d; }
.sa-guide-card[data-accent="lec"]      { --topic-accent:#3f4a9a; }
.sa-guide-card[data-accent="checklist"]{ --topic-accent:#2e4a10; }

/* Card cover area — compact */
.sa-cover-wrap { position:relative; }
.sa-cover { position:relative; display:grid; width:100%; height:160px; place-items:center; overflow:hidden; background:#1c2420; }
.sa-cover::after { position:absolute; inset:0; background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.12)); content:""; pointer-events:none; }
.sa-cover img { position:relative; z-index:1; display:block; width:100%; height:100%; object-fit:contain; object-position:center; }

/* Topic badge — overlaid on cover */
.sa-topic-badge { position:absolute; top:10px; left:10px; z-index:2; padding:4px 9px; border-radius:4px; background:rgba(255,255,255,.92); color:var(--topic-accent); font-size:9px; font-weight:850; letter-spacing:.05em; text-transform:uppercase; box-shadow:0 1px 4px rgba(0,0,0,.12); backdrop-filter:blur(4px); }

/* Card body — compact */
.sa-card-body { display:flex; flex-direction:column; flex:1; padding:14px 16px 14px; }
.sa-guide-meta { display:flex; align-items:center; justify-content:space-between; gap:8px; }
.sa-page-count { flex:0 0 auto; color:var(--sa-muted); font-size:10px; font-weight:700; }
.sa-guide-card h3 { margin:6px 0 5px; font-size:.98rem; line-height:1.28; letter-spacing:-.01em; min-height:2.2em; }
.sa-outcome { margin:0 0 10px; color:#48584e; font-size:12px; line-height:1.5; min-height:2.6em; }
.sa-topics { display:flex; flex-wrap:wrap; gap:5px; margin:0 0 10px; padding:0; list-style:none; }
.sa-topics li { padding:3px 7px; border:1px solid #dce0da; border-radius:4px; background:#f4f6f3; color:#3a4a41; font-size:9px; font-weight:700; }

/* Visible learn + interview sections */
.sa-section-label { margin:0 0 5px; color:var(--sa-ink); font-size:10px; font-weight:850; letter-spacing:.04em; text-transform:uppercase; }
.sa-learn-section,.sa-interview-section { margin:0 0 10px; }
.sa-learn-list,.sa-interview-list { display:grid; gap:3px; margin:0; padding-left:15px; font-size:10.5px; line-height:1.45; }
.sa-learn-list { color:#3a4a41; }
.sa-learn-list li::marker { color:var(--sa-green); }
.sa-interview-section { border-top:1px solid var(--sa-line-light); padding-top:8px; }
.sa-interview-list { color:#445549; }
.sa-interview-list li::marker { color:var(--topic-accent); }

/* Card actions — aligned at bottom */
.sa-guide-actions { display:grid; grid-template-columns:.82fr 1.18fr; gap:7px; margin-top:auto; }
.sa-guide-actions .ps-button { min-width:0; min-height:44px; padding:8px 6px; font-size:11px; }
.sa-guide-actions .ps-button-primary { font-weight:800; }

/* ==========================================================================
   Learning Path
   ========================================================================== */
.sa-learning { padding:56px 0; border-top:1px solid var(--sa-line); background:#eef0ea; }
.sa-learning-header { max-width:700px; margin-bottom:22px; }
.sa-learning-header h2 { margin-top:6px; font-size:clamp(1.5rem,2.8vw,2.2rem); }

/* 4-step path */
.sa-path { display:grid; grid-template-columns:repeat(4,1fr); gap:0; margin:0; padding:0; list-style:none; border:1px solid #c5cec6; border-radius:var(--sa-radius); overflow:hidden; }
.sa-path-step { position:relative; min-width:0; padding:20px 18px; background:#fff; border-right:1px solid #c5cec6; }
.sa-path-step:last-child { border-right:none; }
.sa-step-num { display:inline-flex; align-items:center; justify-content:center; width:28px; height:28px; border-radius:50%; background:var(--sa-green); color:#fff; font:800 12px/1 Outfit,sans-serif; }
.sa-path-step h3 { margin:10px 0 6px; font-size:.92rem; line-height:1.25; }
.sa-path-step p { margin:0; color:#536159; font-size:11px; line-height:1.5; }

/* Disciplined Loop */
.sa-loop { display:grid; grid-template-columns:minmax(200px,.7fr) minmax(0,1.3fr); gap:24px; align-items:center; margin-top:22px; padding:22px; border:1px solid #2d3730; background:var(--sa-charcoal); color:#d2ddd6; border-radius:var(--sa-radius); }
.sa-loop-intro h3 { margin:4px 0; color:#fff !important; font-size:1.2rem; }
.sa-loop-intro p:last-child { margin:0; color:#a4b5ab; font-size:12px; }
.sa-loop .ps-eyebrow { color:#72cf9e; }
.sa-loop-steps { display:grid; grid-template-columns:repeat(2,1fr); gap:8px; margin:0; padding:0; list-style:none; }
.sa-loop-steps li { display:grid; grid-template-columns:26px 1fr; gap:8px; align-items:start; padding:10px; border:1px solid #3a4740; background:#252d28; border-radius:6px; }
.sa-loop-steps li>strong { display:grid; width:26px; height:26px; place-items:center; border:1px solid #5e7066; color:#7ad4a7; font-size:10px; border-radius:50%; }
.sa-loop-steps li span { color:#b9c6be; font-size:10.5px; line-height:1.4; }
.sa-loop-steps li b { display:block; margin-bottom:2px; color:#fff; font-size:11px; }

/* Reference note */
.sa-reference-note { margin-top:16px; padding:12px 16px; border-left:4px solid var(--sa-green); background:#fff; color:#4a5951; font-size:11.5px; line-height:1.55; border-radius:0 6px 6px 0; }
.sa-reference-note strong { color:var(--sa-ink); }

/* ==========================================================================
   CTA Section
   ========================================================================== */
.sa-cta { padding:44px 0; background:#19201c; color:#c8d5cc; }
.sa-cta-grid { display:grid; grid-template-columns:1fr auto; gap:24px; align-items:center; }
.sa-cta h2 { margin-top:4px; color:#fff !important; font-size:clamp(1.2rem,2.4vw,1.8rem); }
.sa-cta .ps-eyebrow { color:#6cc89b; }
.sa-cta .ps-button { min-height:46px; border-color:#6ccc99; background:#6ccc99; color:#13231a; font-weight:800; }
.sa-cta .ps-button:hover { background:#5ab88a; border-color:#5ab88a; }

/* ---------- Focus & Accessibility ---------- */
button:focus-visible,a:focus-visible,summary:focus-visible { outline:3px solid #f0a83e; outline-offset:3px; }

/* ==========================================================================
   Responsive — Tablet (≤ 1100px)
   ========================================================================== */
@media (max-width:1100px) {
  .sa-hero-grid { grid-template-columns:minmax(0,1fr) minmax(320px,.82fr); gap:28px; }
  .sa-hero-visual { height:340px; }
  .sa-stack-scene { width:280px; height:310px; }
  .sa-stack-0 { width:140px; height:192px; }
  .sa-stack-1 { width:155px; height:210px; }
  .sa-stack-2 { width:155px; height:210px; }
  .sa-stack-3 { width:145px; height:198px; }
  .sa-stack-4 { width:136px; height:186px; }
  .sa-stack-5 { width:126px; height:174px; }
  .sa-stack-6 { width:114px; height:158px; }
  .sa-guide-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
}

/* ==========================================================================
   Responsive — Mobile (≤ 800px)
   ========================================================================== */
@media (max-width:800px) {
  .sa-hero-grid { grid-template-columns:1fr; }
  .sa-hero-copy { padding-bottom:8px; }
  .sa-hero-visual { width:min(100%,500px); height:300px; margin:0 auto; }
  .sa-stack-scene { width:260px; height:280px; }
  .sa-metric-strip { grid-template-columns:repeat(2,1fr); margin-top:12px; }
  .sa-metric { border-bottom:1px solid var(--sa-line); }
  .sa-bundle-offer { grid-template-columns:1fr; gap:16px; }
  .sa-bundle-action { text-align:center; }
  .sa-bundle-button { width:100%; }
  .sa-library-header { align-items:flex-start; flex-direction:column; gap:12px; }
  .sa-path { grid-template-columns:repeat(2,1fr); }
  .sa-path-step { border-right:none; border-bottom:1px solid #c5cec6; }
  .sa-path-step:nth-child(odd) { border-right:1px solid #c5cec6; }
  .sa-path-step:nth-last-child(-n+2) { border-bottom:none; }
  .sa-loop { grid-template-columns:1fr; }
}

/* ==========================================================================
   Responsive — Small Mobile (≤ 560px)
   ========================================================================== */
@media (max-width:560px) {
  html { scroll-padding-top:118px; }
  .sa-hero { padding-top:28px; }
  .sa-hero h1 { max-width:340px; font-size:clamp(1.9rem,10vw,2.6rem); line-height:1.04; }
  .sa-hero-lead { font-size:.92rem; line-height:1.55; }
  .sa-hero .ps-actions { display:grid; grid-template-columns:1fr; }
  .sa-hero .ps-button { width:100%; min-height:48px; }
  .sa-hero-visual { height:240px; }
  .sa-stack-scene { width:220px; height:235px; }
  .sa-stack-0 { width:115px; height:158px; }
  .sa-stack-1 { width:128px; height:175px; }
  .sa-stack-2 { width:128px; height:175px; }
  .sa-stack-3 { width:120px; height:164px; }
  .sa-stack-4 { width:112px; height:154px; }
  .sa-stack-5 { width:104px; height:144px; }
  .sa-stack-6 { width:94px; height:130px; }
  .sa-metric { padding:14px 12px; }
  .sa-metric span { font-size:10.5px; }
  .sa-bundle-panel { padding:20px 0; }
  .sa-bundle-offer { gap:14px; padding:18px 16px; }
  .sa-bundle-facts { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:6px; }
  .sa-bundle-facts span+span::before { display:none; }
  .sa-library { padding:44px 0 52px; }
  .sa-filter-wrap { margin-inline:-2px; }
  .sa-guide-grid { grid-template-columns:1fr; gap:16px; }
  .sa-cover { height:auto; aspect-ratio:960/536; }
  .sa-card-body { padding:14px 14px 14px; }
  .sa-guide-card h3,.sa-outcome { min-height:auto; }
  .sa-guide-actions { grid-template-columns:1fr 1fr; }
  .sa-guide-actions .ps-button { min-height:44px; }
  .sa-learning { padding:44px 0; }
  .sa-path { grid-template-columns:1fr; }
  .sa-path-step { border-right:none !important; border-bottom:1px solid #c5cec6; }
  .sa-path-step:last-child { border-bottom:none; }
  .sa-loop { padding:18px 16px; }
  .sa-loop-steps { grid-template-columns:1fr; }
  .sa-cta-grid { grid-template-columns:1fr; }
  .sa-cta .ps-button { width:100%; }
}

/* ==========================================================================
   Responsive — Extra Small (≤ 350px)
   ========================================================================== */
@media (max-width:350px) {
  .sa-hero h1 { font-size:1.8rem; }
  .sa-guide-actions { grid-template-columns:1fr; }
  .sa-bundle-facts { grid-template-columns:1fr; }
  .sa-stack-scene { width:180px; height:200px; }
  .sa-stack-0 { width:95px; height:130px; }
  .sa-stack-1 { width:106px; height:145px; }
  .sa-stack-2 { width:106px; height:145px; }
  .sa-stack-3 { width:99px; height:135px; }
  .sa-stack-4 { width:93px; height:127px; }
  .sa-stack-5 { width:86px; height:118px; }
  .sa-stack-6 { width:78px; height:107px; }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion:reduce) {
  .sa-guide-card { transition:none; }
  .sa-guide-card:hover { transform:none; }
  .sa-stack-book { transition:none; }
  .sa-stack-book:hover { transform:none !important; }
}