/* Shared portfolio theme for blog and article pages.
   Keeps the existing page layouts/content while matching index.html's visual system. */
:root {
  --bg-rgb: 247, 248, 251;
  --bg: #f7f8fb;
  --s1: #ffffff;
  --s2: #f0f2f6;
  --s3: #e7eaf0;
  --bd: rgba(16, 17, 20, 0.10);
  --bd2: rgba(16, 17, 20, 0.18);
  --mu: #7e838d;
  --mu2: #50545d;
  --tx: #101114;
  --ac: #315efb;
  --acd: #244bd6;
  --in: #6a8cff;
  --ro: #d84969;
  --fd: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --fb: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --fm: "DM Mono", "SFMono-Regular", Consolas, monospace;
  --r: 14px;
  --rl: 24px;
  --expo: cubic-bezier(.2,.75,.22,1);
  --spring: cubic-bezier(.2,1.2,.35,1);
  --theme-shadow-sm: 0 10px 30px rgba(27, 32, 43, 0.08);
  --theme-shadow-md: 0 24px 80px rgba(27, 32, 43, 0.12);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg-rgb: 16, 17, 20;
  --bg: #101114;
  --s1: #17191e;
  --s2: #1d2026;
  --s3: #252932;
  --bd: rgba(255, 255, 255, 0.09);
  --bd2: rgba(255, 255, 255, 0.17);
  --mu: #7f8590;
  --mu2: #afb4bf;
  --tx: #f3f4f7;
  --ac: #7c9cff;
  --acd: #9eb5ff;
  --in: #9eb5ff;
  --ro: #ff7894;
  --theme-shadow-sm: 0 10px 35px rgba(0, 0, 0, .24);
  --theme-shadow-md: 0 26px 90px rgba(0, 0, 0, .34);
  color-scheme: dark;
}

html { scroll-padding-top: 96px; }
body {
  background: var(--bg);
  color: var(--tx);
  font-family: var(--fb);
  text-rendering: optimizeLegibility;
  transition: background-color .45s var(--expo), color .45s var(--expo);
}
body::after { display: none !important; }
::selection { background: var(--ac); color: #fff; }
:focus-visible { outline: 2px solid var(--ac); outline-offset: 4px; border-radius: 6px; }

/* Homepage-style scroll progress + pointer. */
#spb { background: var(--ac) !important; box-shadow: 0 0 12px color-mix(in srgb, var(--ac) 32%, transparent); }
#cur { background: var(--ac) !important; }
#cur-r { border-color: color-mix(in srgb, var(--ac) 42%, transparent) !important; }
body.ch #cur-r { border-color: color-mix(in srgb, var(--ac) 22%, transparent) !important; }

/* Floating pill header to match the portfolio homepage. */
header#hdr {
  top: 18px;
  width: min(calc(100% - 36px), 1280px);
  max-width: 1280px;
  height: 68px;
  padding: 0 12px 0 22px;
  gap: 18px;
  background: transparent;
  border-color: transparent;
  border-radius: 999px;
  backdrop-filter: none;
  box-shadow: none;
  transition: top .35s var(--expo), width .35s var(--expo), height .35s var(--expo), background .35s var(--expo), border-color .35s var(--expo), box-shadow .35s var(--expo), backdrop-filter .35s var(--expo);
}
header#hdr.scrolled {
  top: 10px;
  width: min(calc(100% - 28px), 1120px);
  max-width: 1120px;
  height: 58px;
  background: rgba(var(--bg-rgb), .82);
  border-color: var(--bd);
  backdrop-filter: blur(24px) saturate(150%);
  box-shadow: var(--theme-shadow-sm);
}
.logo {
  flex: 0 0 auto;
  gap: 10px !important;
  font-family: var(--fd) !important;
  font-size: 16px !important;
  font-weight: 800 !important;
  letter-spacing: -.04em !important;
}
.logo .lmu { color: var(--ac); font-weight: 800; }
.lpip {
  position: relative;
  display: block;
  width: 22px !important;
  height: 22px !important;
  flex: 0 0 22px;
  border: 1.5px solid var(--tx);
  border-radius: 50%;
  background: transparent !important;
  box-shadow: none !important;
  animation: none !important;
  transform: rotate(-8deg);
}
.lpip::before,
.lpip::after {
  content: "";
  position: absolute;
  inset: 0 6px;
  border: 1.5px solid var(--tx);
  border-radius: 50%;
}
.lpip::before { transform: rotate(60deg); }
.lpip::after { transform: rotate(-60deg); }

.navl { margin-left: auto; gap: 30px !important; }
.navl a,
.hback {
  font-family: var(--fd) !important;
  font-size: 13px !important;
  font-weight: 600 !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
  color: var(--mu2) !important;
}
.navl a:hover,
.navl a.active,
.hback:hover { color: var(--tx) !important; }
.navl a::after { background: var(--ac) !important; bottom: 4px !important; }
.ncta {
  min-height: 42px;
  display: inline-flex !important;
  align-items: center;
  padding: 0 18px !important;
  border-radius: 999px !important;
  background: var(--tx) !important;
  color: var(--bg) !important;
  font-family: var(--fd) !important;
  font-size: 13px !important;
  font-weight: 700 !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
}
.ncta:hover { background: var(--tx) !important; box-shadow: var(--theme-shadow-sm) !important; }
.hback { margin-left: auto; padding: 10px 0; }
.hback svg { width: 16px !important; height: 16px !important; }

.site-theme-toggle {
  position: relative;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  appearance: none;
  border: 1px solid var(--bd);
  border-radius: 50%;
  background: var(--s1);
  color: var(--tx);
  cursor: pointer;
  transition: background .25s ease, border-color .25s ease, transform .25s var(--expo);
}
.site-theme-toggle:hover { border-color: var(--bd2); transform: translateY(-1px); }
.site-theme-toggle svg {
  position: absolute;
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: opacity .25s ease, transform .35s var(--expo);
}
.site-theme-toggle .moon { opacity: 0; transform: scale(.6) rotate(-25deg); }
html[data-theme="dark"] .site-theme-toggle .sun { opacity: 0; transform: scale(.6) rotate(25deg); }
html[data-theme="dark"] .site-theme-toggle .moon { opacity: 1; transform: scale(1) rotate(0); }

/* Hero + article surfaces use the same restrained blue system as index.html. */
.hgrid, .mgrid {
  background-image: linear-gradient(var(--bd) 1px, transparent 1px), linear-gradient(90deg, var(--bd) 1px, transparent 1px) !important;
  background-size: 80px 80px !important;
  opacity: .55;
}
.hero-orb, .orb { filter: blur(115px) !important; }
.ho1, .o1 { background: color-mix(in srgb, var(--ac) 12%, transparent) !important; }
.ho2 { background: color-mix(in srgb, var(--in) 10%, transparent) !important; }
.morbg {
  background: radial-gradient(ellipse 70% 60% at 20% 40%, color-mix(in srgb, var(--ac) 13%, transparent) 0%, transparent 65%),
              radial-gradient(ellipse 50% 50% at 75% 20%, color-mix(in srgb, var(--in) 9%, transparent) 0%, transparent 60%) !important;
}
.blog-hero h1,
h1.hh1,
h1.headline,
h2.stit,
.prose h2,
.prose h3,
.fc-title,
.bc-title,
.nl-left h3,
.ctaband h3,
.cta-block h3,
.bio-content h4 { font-family: var(--fd) !important; }
.blog-hero h1,
h1.hh1,
h1.headline { letter-spacing: -.055em !important; font-weight: 650 !important; }
.blog-hero h1 em,
h1.headline em,
.hh1 .hi { color: var(--mu2) !important; }
.eye,
.eye-label,
.hbadge,
.featured-label,
.alabel { color: var(--mu) !important; }
.eye::before,
.eye-label::before,
.featured-label::after { background: var(--ac) !important; }

/* Cards, callouts and controls. */
.featured-card,
.bc,
.nl-wrap,
.abox,
.sc,
.tc,
.faql,
.callout,
.metric-strip,
.faq-block,
.cta-block,
.author-bio,
.read-badge {
  border-color: var(--bd) !important;
  box-shadow: none !important;
}
.featured-card:hover,
.bc:hover,
.sc:hover,
.tc:hover { border-color: var(--bd2) !important; box-shadow: var(--theme-shadow-sm) !important; }
.ftag,
.pnum,
.bto,
.bts,
.cta-btn,
.nl-btn { border-radius: 999px !important; }
.ftag.active,
.pnum.active,
.bts,
.cta-btn,
.nl-btn {
  background: var(--tx) !important;
  border-color: var(--tx) !important;
  color: var(--bg) !important;
}
.ftag:hover,
.pnum:hover,
.bto:hover { border-color: var(--bd2) !important; color: var(--tx) !important; }
.read-link,
.bc-read,
.breadc a:hover,
.toc li a:hover,
.toc li a.active,
.prose p strong,
.prose li strong,
.sv,
.alabel { color: var(--ac) !important; }

/* Keep semantic tag differences, but soften them to fit the portfolio palette. */
.ptag { background: color-mix(in srgb, var(--ac) 9%, transparent) !important; border-color: color-mix(in srgb, var(--ac) 20%, transparent) !important; color: var(--ac) !important; }
.ptag.indigo, .ptag.teal { background: color-mix(in srgb, var(--in) 9%, transparent) !important; border-color: color-mix(in srgb, var(--in) 20%, transparent) !important; color: var(--in) !important; }

/* Forms + footer. */
.nl-input { background: var(--bg) !important; border-color: var(--bd) !important; color: var(--tx) !important; }
.nl-input:focus { border-color: var(--ac) !important; }
footer { border-color: var(--bd) !important; }
.fcopy, .flinks a { color: var(--mu) !important; }
.fcopy strong, .flinks a:hover { color: var(--tx) !important; }

@media (max-width: 780px) {
  header#hdr { top: 10px; width: calc(100% - 24px); height: 58px; padding: 0 9px 0 16px; background: rgba(var(--bg-rgb), .86); border-color: var(--bd); backdrop-filter: blur(20px) saturate(150%); }
  .site-theme-toggle { width: 38px; height: 38px; flex-basis: 38px; }
  .navl ~ .site-theme-toggle { margin-left: auto; }
  .brg { width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--bd) !important; border-radius: 50%; background: var(--s1) !important; }
  .brg span { width: 15px !important; background: var(--tx) !important; }
  .navl.open { top: 78px !important; left: 12px !important; right: 12px !important; border-radius: 24px !important; background: rgba(var(--bg-rgb), .96) !important; border-color: var(--bd) !important; box-shadow: var(--theme-shadow-md); backdrop-filter: blur(24px); }
  .navl.open a { font-size: 14px !important; }
  .hback { font-size: 12px !important; }
}

@media (max-width: 520px) {
  .logo .lmu { display: none; }
  .hback { gap: 5px !important; }
}