/* ── TOKENS ─────────────────────────────────────────────── */
:root {
  --bg:      #ffffff;
  --bg-rail: #f8f8f8;
  --bg-card: #ffffff;
  --text:    #111111;
  --text-2:  #444444;
  --text-3:  #999999;
  --accent:  #b07828;
  --acc-l:   #d4963e;
  --line:    rgba(0,0,0,0.09);
  --line-s:  rgba(0,0,0,0.15);
  --node-bg: #fff8ee;
  --node-bd: rgba(176,120,40,0.28);
  --head: 'Playfair Display', Georgia, serif;
  --body: 'Lora', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
}
[data-theme="dark"] {
  --bg:      #0d1018;
  --bg-rail: #111520;
  --bg-card: #161b26;
  --text:    #ddd8cf;
  --text-2:  #8a8880;
  --text-3:  #555250;
  --accent:  #c8963e;
  --acc-l:   #e0b06a;
  --line:    rgba(255,255,255,0.07);
  --line-s:  rgba(255,255,255,0.13);
  --node-bg: rgba(200,150,62,0.10);
  --node-bd: rgba(200,150,62,0.28);
}

/* ── RESET ──────────────────────────────────────────────── */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background .3s, color .3s;
}
a { text-decoration:none; color:inherit; }

/* ── SHELL ──────────────────────────────────────────────── */
.shell {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ── LEFT RAIL ──────────────────────────────────────────── */
.rail {
  background: var(--bg-rail);
  border-right: 1px solid var(--line);
  padding: 36px 26px 40px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: background .3s, border-color .3s;
}
.rail::-webkit-scrollbar { width: 0; }

.author-greeting {
  font-family: var(--sans);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--text);
  line-height: 1.25;
}

.author-photo {
  width: 170px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--bg-card);
  box-shadow: 0 6px 28px rgba(0,0,0,.14);
  align-self: center;
  flex-shrink: 0;
  background: var(--bg-card);
  transition: box-shadow .3s;
}
[data-theme="dark"] .author-photo { box-shadow: 0 6px 28px rgba(0,0,0,.45); }
.author-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.bio {
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-2);
}

/* Social icons */
.socials { display:flex; gap:10px; flex-wrap:wrap; }
.soc {
  width: 46px; height: 46px;
  border-radius: 50%;
  display: flex; align-items:center; justify-content:center;
  color: #fff;
  font-weight: 700; font-size: 17px;
  font-family: var(--sans);
  transition: transform .18s, opacity .18s;
  flex-shrink: 0;
}
.soc:hover { transform:translateY(-2px); opacity:.88; }
.soc-fb { background: #1877f2; }
.soc-pi { background: #e60023; }
.soc-x  { background: #111111; }
.soc-li { background: #0a66c2; }

/* Blog list */
.rail-heading {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--text);
}
.blog-list { list-style:none; display:flex; flex-direction:column; gap:0; }
.blog-list li { border-bottom: 1px solid var(--line); }
.blog-list li:last-child { border-bottom: none; }
.blog-btn {
  width: 100%; text-align: left;
  background: none; border: none; cursor: pointer;
  padding: 12px 4px 12px 14px;
  font-family: var(--sans);
  font-size: 14px; line-height: 1.5;
  color: var(--text-2);
  border-left: 3px solid transparent;
  transition: color .2s, border-color .2s, background .2s;
}
.blog-btn:hover { color:var(--text); border-left-color:var(--accent); background:rgba(0,0,0,.03); }
.blog-btn.active { color:var(--accent); border-left-color:var(--accent); font-weight:600; }
[data-theme="dark"] .blog-btn:hover { background:rgba(255,255,255,.03); }

/* ── RIGHT PANEL ────────────────────────────────────────── */
.right-panel {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── TOP BAR ────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  padding: 0 48px;
  height: 54px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
  transition: background .3s, border-color .3s;
}
.nav-links { display:flex; gap:32px; flex:1; }
.nav-btn {
  background:none; border:none; cursor:pointer;
  font-family:var(--sans); font-size:11px; font-weight:600;
  letter-spacing:.1em; text-transform:uppercase;
  color:var(--text-3); padding:0;
  transition:color .2s; position:relative;
}
.nav-btn::after {
  content:''; position:absolute; bottom:-4px; left:0;
  width:0; height:1px; background:var(--accent);
  transition:width .2s;
}
.nav-btn:hover { color:var(--text); }
.nav-btn:hover::after, .nav-btn.active::after { width:100%; }
.nav-btn.active { color:var(--accent); }

/* Theme toggle */
.toggle-wrap {
  display:flex; align-items:center; gap:8px;
  cursor:pointer; user-select:none; margin-left:auto;
}
.toggle-icon { font-size:13px; line-height:1; color:var(--text-3); }
.toggle-track {
  width:38px; height:21px; border-radius:11px;
  background:var(--line-s); position:relative;
  border:1px solid var(--line-s);
  transition:background .3s;
}
.toggle-knob {
  width:15px; height:15px; border-radius:50%;
  background:var(--text-3);
  position:absolute; top:2px; left:2px;
  transition:transform .25s, background .3s;
}
[data-theme="dark"] .toggle-knob { transform:translateX(17px); background:var(--accent); }
[data-theme="dark"] .toggle-track { background:rgba(200,150,62,.18); border-color:rgba(200,150,62,.3); }
.toggle-label {
  font-family:var(--sans); font-size:10px; font-weight:600;
  letter-spacing:.1em; text-transform:uppercase;
  color:var(--text-3);
}

/* ── CONTENT PANE ───────────────────────────────────────── */
.content-wrap { display:flex; flex-direction:column; flex:1; }
.content-pane {
  padding: 48px 60px 72px;
  width: 100%;
  max-width: 900px;
  flex: 1;
}

/* ── HOME / POSTS LIST ──────────────────────────────────── */
.home-card {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: border-color .3s;
}
.home-card:first-child { padding-top:0; }
.home-card:last-child { border-bottom:none; }
.home-card-kicker {
  font-family:var(--sans); font-size:10px; font-weight:600;
  letter-spacing:.16em; text-transform:uppercase;
  color:var(--accent); margin-bottom:8px;
}
.home-card-title {
  font-family:var(--head); font-size:27px; font-weight:700;
  line-height:1.22; letter-spacing:-.01em;
  color:var(--text); margin-bottom:10px;
  transition:color .2s;
}
.home-card:hover .home-card-title { color:var(--acc-l); }
.home-card-excerpt {
  font-size:15px; line-height:1.75;
  color:var(--text-2); margin-bottom:12px;
}
.read-more {
  font-family:var(--sans); font-size:11px; font-weight:600;
  letter-spacing:.1em; text-transform:uppercase;
  color:var(--accent); display:inline-flex; align-items:center; gap:6px;
  transition:gap .2s;
}
.read-more::after { content:'→'; font-family:sans-serif; }
.read-more:hover { gap:10px; }

/* ── ARTICLE ────────────────────────────────────────────── */
.article-kicker {
  font-family:var(--sans); font-size:10px; font-weight:600;
  letter-spacing:.18em; text-transform:uppercase;
  color:var(--accent); margin-bottom:12px;
  display:flex; align-items:center; gap:10px;
}
.article-kicker::before { content:''; width:20px; height:1px; background:var(--accent); display:block; }

.article-title {
  font-family:var(--head); font-size:32px; font-weight:800;
  line-height:1.1; letter-spacing:-.025em;
  color:var(--text); margin-bottom:16px;
  padding-bottom:16px;
  border-bottom:3px solid var(--accent);
}
.article-byline {
  font-family:var(--sans); font-size:11px; font-weight:500;
  letter-spacing:.08em; color:var(--text-3);
  margin-bottom:36px;
  display:flex; align-items:center; justify-content:space-between;
  flex-wrap:wrap; gap:8px;
}
.byline-demo {
  font-family:var(--sans); font-size:11px; font-weight:600;
  letter-spacing:.08em; color:var(--accent);
  border:1px solid var(--node-bd);
  background:var(--node-bg);
  padding:4px 12px; border-radius:3px;
  transition:background .2s, color .2s;
  white-space:nowrap;
  margin-left:auto;
}
.byline-demo:hover {
  background:var(--accent); color:#fff;
}
.article-body p {
  font-size:17px; line-height:1.87;
  color:var(--text-2); margin-bottom:22px;
  text-align:justify;
  hyphens:auto;
}
.article-body h2 {
  font-family:var(--head); font-size:27px; font-weight:700;
  line-height:1.22; letter-spacing:-.015em;
  color:var(--text); margin:48px 0 14px;
}
.article-body h3 {
  font-family:var(--head); font-size:20px; font-weight:700;
  color:var(--text); margin:32px 0 12px;
}

/* Diagram */
.diagram {
  margin:30px 0; padding:20px 22px;
  border:1px solid var(--line-s); border-radius:6px;
  background:var(--bg-card);
  transition:background .3s, border-color .3s;
}
.diagram-title {
  font-family:var(--sans); font-size:10px; font-weight:600;
  letter-spacing:.14em; text-transform:uppercase;
  color:var(--accent); margin-bottom:14px;
}
.flow { display:flex; flex-wrap:wrap; gap:8px; align-items:center; }
.node {
  padding:7px 12px;
  border:1px solid var(--node-bd);
  background:var(--node-bg); border-radius:3px;
  font-family:var(--sans); font-size:12px; font-weight:600;
  color:var(--accent); letter-spacing:.04em;
  transition:background .3s;
}
.arr { color:var(--text-3); font-size:14px; }

/* Two col */
.two-col { display:grid; grid-template-columns:1fr 1fr; gap:12px; margin:28px 0; }
.callout {
  padding:16px 18px;
  border:1px solid var(--line-s); border-radius:5px;
  background:var(--bg-card);
  transition:background .3s, border-color .3s;
}
.callout-head {
  font-family:var(--sans); font-size:10px; font-weight:600;
  letter-spacing:.14em; text-transform:uppercase;
  color:var(--accent); margin-bottom:8px;
}
.callout p { font-size:14px; line-height:1.75; color:var(--text-2); margin:0; }

/* Note */
.note {
  margin:28px 0; padding:16px 20px;
  border-left:3px solid var(--accent);
  background:var(--node-bg); border-radius:0 4px 4px 0;
  transition:background .3s;
}
.note strong {
  display:block; font-family:var(--sans); font-size:10px; font-weight:600;
  letter-spacing:.12em; text-transform:uppercase;
  color:var(--accent); margin-bottom:7px;
}
.note p { font-size:15px; line-height:1.75; color:var(--text-2); margin:0; }

/* About / static */
.static-title {
  font-family:var(--head); font-size:50px; font-weight:800;
  line-height:1.1; letter-spacing:-.03em;
  color:var(--text); margin-bottom:28px;
}
.static-body p { font-size:17px; line-height:1.85; color:var(--text-2); margin-bottom:20px; }

/* Progress */
#progress {
  position:fixed; top:0; left:0; height:2px; width:0%;
  background:linear-gradient(90deg, var(--accent), var(--acc-l));
  z-index:100; transition:width .1s linear;
}

/* Animations */
@keyframes fadeUp {
  from { opacity:0; transform:translateY(12px); }
  to   { opacity:1; transform:translateY(0); }
}
.fade-in { animation:fadeUp .38s ease both; }

/* Footer */
.site-footer {
  padding: 22px 56px;
  border-top: 1px solid var(--line);
  display: flex; align-items:center; justify-content:space-between;
  font-family:var(--sans); font-size:11px; color:var(--text-3);
  transition:border-color .3s;
}


/* ── Example cards (real-world cases) ──────────────────── */
.examples-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 32px 0;
}
.example-card {
  border: 1px solid var(--line-s);
  border-radius: 6px;
  background: var(--bg-card);
  overflow: hidden;
  transition: background .3s, border-color .3s;
}
.example-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px 14px;
  border-bottom: 1px solid var(--line);
}
.example-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--sans);
  font-size: 12px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.example-card-title {
  font-family: var(--sans);
  font-size: 14px; font-weight: 700;
  color: var(--text);
  letter-spacing: .01em;
}
.example-card-body {
  padding: 14px 20px 16px;
}
.example-card-body ul {
  list-style: none;
  padding: 0; margin: 0 0 14px;
  display: flex; flex-direction: column; gap: 6px;
}
.example-card-body ul li {
  font-family: var(--sans);
  font-size: 14px; line-height: 1.65;
  color: var(--text-2);
  padding-left: 16px;
  position: relative;
}
.example-card-body ul li::before {
  content: '–';
  position: absolute; left: 0;
  color: var(--accent);
}
.example-insight {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  background: var(--node-bg);
  border-radius: 4px;
  transition: background .3s;
}
.example-insight-label {
  font-family: var(--sans);
  font-size: 10px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
  padding-top: 1px;
}
.example-insight p {
  font-family: var(--sans);
  font-size: 13px !important;
  line-height: 1.65 !important;
  color: var(--text-2) !important;
  margin: 0 !important;
  text-align: left !important;
}

/* ── Shift callout (industry shift block) ───────────────── */
.shift-block {
  margin: 32px 0;
  padding: 22px 24px;
  border: 1px solid var(--line-s);
  border-radius: 6px;
  background: var(--bg-card);
  transition: background .3s, border-color .3s;
}
.shift-block-label {
  font-family: var(--sans);
  font-size: 10px; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px;
}
.shift-row {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--text-2);
}
.shift-old {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  font-style: italic;
  color: var(--text-3);
  transition: background .3s;
}
.shift-arrow {
  font-size: 20px;
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}
.shift-new {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid rgba(176,120,40,.35);
  border-radius: 4px;
  background: var(--node-bg);
  font-weight: 600;
  color: var(--text);
  transition: background .3s;
}


/* ── References section ─────────────────────────────────── */
.references {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 2px solid var(--line-s);
}
.references-title {
  font-family: var(--sans);
  font-size: 11px; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 20px;
}
.references-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 14px;
}
.references-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.ref-num {
  font-family: var(--sans);
  font-size: 11px; font-weight: 700;
  color: #fff;
  background: var(--accent);
  width: 22px; height: 22px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}
.ref-content {
  display: flex; flex-direction: column; gap: 3px;
}
.ref-link {
  font-family: var(--sans);
  font-size: 14px; font-weight: 500;
  color: var(--accent);
  line-height: 1.5;
  transition: color .2s;
}
.ref-link:hover { color: var(--acc-l); text-decoration: underline; }
.ref-source {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--text-3);
  font-style: italic;
}


/* ── Coming soon badge & sidebar entry ──────────────────── */
.blog-btn--soon {
  opacity: .75;
}
.blog-btn--soon:hover { opacity: 1; }
.coming-soon-badge {
  display: inline-block;
  font-family: var(--sans);
  font-size: 9px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: #fff;
  background: var(--accent);
  padding: 2px 7px;
  border-radius: 3px;
  margin-left: 6px;
  vertical-align: middle;
  line-height: 1.6;
}

/* ── Coming soon pane ───────────────────────────────────── */
.coming-soon-pane {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 60vh;
  max-width: 580px;
}
.cs-label {
  font-family: var(--sans);
  font-size: 10px; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent);
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 20px;
}
.cs-label::before {
  content: ''; width: 22px; height: 1px;
  background: var(--accent); display: block;
}
.cs-title {
  font-family: var(--head);
  font-size: 36px; font-weight: 800;
  line-height: 1.18; letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: 22px;
}
.cs-desc {
  font-size: 16px !important;
  line-height: 1.8 !important;
  color: var(--text-2) !important;
  margin-bottom: 32px !important;
  text-align: left !important;
}
.cs-back {
  font-family: var(--sans);
  font-size: 11px; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 6px;
  transition: gap .2s;
}
.cs-back:hover { gap: 10px; }

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media(max-width:860px){
  .shell { grid-template-columns:1fr; }
  .rail  { position:static; height:auto; }
  .topbar, .content-pane, .site-footer { padding-left:20px; padding-right:20px; }
  .two-col { grid-template-columns:1fr; }
  .article-title { font-size:24px; }
  .static-title  { font-size:32px; }
}