:root {
  --navy: #0c2038;
  --navy-2: #173b5f;
  --ink: #13243a;
  --ink-soft: #43546a;
  --paper: #f4f6f8;
  --surface: #ffffff;
  --line: #d9e0e7;
  --theory: #3b67b1;
  --systems: #a75e37;
  --accent: #d7a84e;
  --muted: #6d7887;
  --shadow: 0 18px 45px rgba(17, 35, 56, .09);
  --radius: 16px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.site {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font: 1rem/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: #245aa4; font-weight: 650; text-underline-offset: .2em; }
a:hover { color: #153d78; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid #efbd5d; outline-offset: 3px; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: .5rem;
  left: .5rem;
  padding: .65rem .9rem;
  color: var(--navy);
  background: #fff;
  border-radius: 8px;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-shell { width: min(1120px, calc(100% - 2.5rem)); margin-inline: auto; }
.site-header {
  color: #f8fbff;
  background: linear-gradient(115deg, rgba(8, 27, 48, .98), rgba(18, 57, 91, .94));
  border-bottom: 4px solid var(--accent);
}
.site-header .site-shell { padding-block: 1.25rem 3.5rem; }
.site-header:not(.home-header) .site-shell { padding-bottom: 2.4rem; }
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-bottom: 3.5rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: #fff;
  text-decoration: none;
  font-size: .84rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  aspect-ratio: 1;
  color: var(--navy);
  background: var(--accent);
  border-radius: 50%;
  font-weight: 800;
  letter-spacing: 0;
}
nav { margin: 0; }
nav ul { display: flex; flex-wrap: wrap; gap: .25rem 1rem; margin: 0; padding: 0; list-style: none; }
nav a {
  display: inline-block;
  padding: .45rem .15rem;
  color: #e8f0f8;
  text-decoration: none;
  font-size: .88rem;
  font-weight: 600;
  border-bottom: 1px solid transparent;
}
nav a:hover, nav a:focus-visible { color: #fff; border-bottom-color: var(--accent); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(250px, .65fr);
  gap: 3rem;
  align-items: end;
}
.eyebrow, .kicker {
  margin: 0 0 .65rem;
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.eyebrow { color: #a9c7e4; }
.kicker { color: var(--systems); }
.site-header h1 {
  max-width: 880px;
  margin: 0;
  color: #fff;
  font: 700 clamp(2.45rem, 6vw, 5.35rem)/.98 var(--serif);
  letter-spacing: -.045em;
}
.site-header:not(.home-header) h1 { font-size: clamp(2.25rem, 5vw, 4.25rem); }
.hero-intro { max-width: 790px; margin: 1.25rem 0 0; color: #dce8f2; font-size: clamp(1rem, 1.8vw, 1.18rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.6rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: .62rem 1rem;
  border: 1px solid transparent;
  border-radius: 7px;
  text-decoration: none;
  font-size: .9rem;
  font-weight: 750;
}
.button-primary { color: var(--navy); background: var(--accent); }
.button-primary:hover { color: var(--navy); background: #e7bd69; }
.button-quiet { color: #fff; border-color: rgba(255,255,255,.38); }
.button-quiet:hover { color: var(--navy); background: #fff; }
.button-dark { color: #fff; background: var(--navy); }
.button-dark:hover { color: #fff; background: var(--navy-2); }
.hero-note { padding: 1.2rem 1.3rem; border-left: 2px solid var(--accent); background: rgba(255,255,255,.07); }
.hero-note p { margin: .45rem 0 0; color: #e9f0f7; font-family: var(--serif); font-size: 1.08rem; line-height: 1.55; }
.note-label { color: #b6cbe0; font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }

.page-content { padding-block: 3.75rem; }
.section-block { margin-bottom: 4rem; }
.section-heading { max-width: 760px; margin-bottom: 1.75rem; }
.compact-heading { margin-bottom: 1.4rem; }
.section-heading h2, .profile-copy h2, .systems-preview h2, .page-content > article h2 {
  margin: 0;
  color: var(--ink);
  font: 700 clamp(1.8rem, 4vw, 3rem)/1.12 var(--serif);
  letter-spacing: -.035em;
}
.section-heading > p:last-child { margin: .8rem 0 0; color: var(--ink-soft); }
.track-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.track-card {
  position: relative;
  overflow: hidden;
  min-height: 330px;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 5px solid var(--theory);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.systems-card { border-top-color: var(--systems); }
.track-card h3 { max-width: 470px; margin: 1.2rem 0 .8rem; font: 700 clamp(1.55rem, 3vw, 2.3rem)/1.15 var(--serif); }
.track-card > p:not(.track-number) { max-width: 55ch; color: var(--ink-soft); }
.track-number { margin: 0; color: var(--muted); font: 700 .78rem/1 var(--sans); letter-spacing: .15em; }
.tag-list { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1.25rem 0 1.6rem; padding: 0; list-style: none; }
.tag-list li { padding: .3rem .58rem; color: var(--ink-soft); background: #f1f4f7; border-radius: 4px; font-size: .78rem; font-weight: 700; }
.text-link { display: inline-block; }

.profile-strip {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(220px, .5fr);
  gap: 3rem;
  align-items: center;
  margin-bottom: 4rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  background: #e9eef3;
  border-radius: var(--radius);
}
.profile-copy p { max-width: 67ch; }
.inline-links, .stacked-links { display: flex; flex-wrap: wrap; gap: .65rem 1.15rem; }
.profile-figure { margin: 0; }
.profile-figure img { display: block; width: 100%; max-height: 350px; object-fit: cover; border-radius: 8px; filter: saturate(.86); }
figcaption { margin-top: .55rem; color: var(--muted); font-size: .82rem; }

.resource-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; align-items: stretch; }
.resource-card { display: flex; min-width: 0; min-height: 100%; flex-direction: column; padding: 1.4rem; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.resource-card h3 { margin: .55rem 0; font: 700 1.35rem/1.2 var(--serif); }
.resource-card p { color: var(--ink-soft); }
.resource-card > a, .resource-card > .status-pill, .resource-card > .stacked-links { align-self: flex-start; margin-top: auto; }
.resource-type { color: var(--systems); font-size: .7rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.status-pill { display: inline-block; padding: .28rem .5rem; color: #68451e; background: #f5e7ca; border-radius: 4px; font-size: .78rem; font-weight: 700; }

.systems-preview {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(220px, .6fr);
  gap: 2rem;
  align-items: center;
  margin-bottom: 4rem;
  padding: clamp(1.6rem, 4vw, 3rem);
  color: #f8fbff;
  background: #432f2a;
  border-radius: var(--radius);
}
.systems-preview h2 { color: #fff; }
.systems-preview p { max-width: 68ch; color: #eadfd9; }
.systems-preview-actions { display: grid; gap: .75rem; }
.systems-preview-actions span { color: #cfbfb7; font-size: .8rem; }

.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.contact-card {
  display: grid;
  gap: .2rem;
  padding: 1.15rem 1.25rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
}
.contact-card:hover { color: var(--ink); border-color: #9eb0c4; transform: translateY(-1px); }
.contact-card span { color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.contact-card strong { overflow-wrap: anywhere; }
.contact-placeholder { color: var(--muted); background: #eef1f4; border-style: dashed; }

.page-content > article {
  position: relative;
  margin-bottom: 1.25rem;
  padding: clamp(1.35rem, 3vw, 2.25rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.page-content > article h2 { font-size: clamp(1.55rem, 3vw, 2.25rem); }
.page-content h3 { margin: 1.6rem 0 .55rem; color: var(--ink-soft); }
.page-content p { max-width: 77ch; }
.page-content ul { padding-left: 1.2rem; }
.page-content li + li { margin-top: .45rem; }
hr { display: none; }
figure { margin: 1.25rem 0 0; }
figure img { display: block; width: 100%; max-width: 390px; height: auto; border-radius: 10px; box-shadow: var(--shadow); }
details { padding: 1rem; background: #f6f8fa; border: 1px solid var(--line); border-radius: 8px; }
summary { cursor: pointer; font-weight: 750; }
mark { padding: .1em .3em; color: inherit; background: #f5e6b7; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .7rem; border-bottom: 1px solid var(--line); text-align: left; }
th { background: #edf1f5; }

.lab-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.lab-card { padding: 1.35rem; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.lab-card h3 { margin-top: 0; font-family: var(--serif); }
.method-list { counter-reset: method; display: grid; gap: .6rem; padding: 0; list-style: none; }
.method-list li { display: grid; grid-template-columns: 2rem 1fr; gap: .65rem; align-items: start; }
.method-list li::before { counter-increment: method; content: counter(method, decimal-leading-zero); color: var(--systems); font-size: .74rem; font-weight: 800; }
.notice { padding: 1rem 1.1rem; color: #563a20; background: #f7ead5; border-left: 3px solid var(--accent); }

.site-footer { padding: 2rem 0; color: #cbd7e3; background: var(--navy); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1.4rem 2rem; }
.site-footer p { margin: .2rem 0 0; color: #9fb1c2; font-size: .86rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: .6rem 1rem; }
.footer-links a { color: #e5edf4; font-size: .85rem; }
.footer-social {
  display: flex;
  grid-column: 1 / -1;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: .65rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255,255,255,.14);
}
.social-link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  min-height: 2.65rem;
  padding: .55rem .8rem;
  color: #f2f6f9;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 6px;
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
}
.social-link:hover { color: #fff; border-color: var(--accent); background: rgba(255,255,255,.06); }
.social-link svg { width: 1.15rem; height: 1.15rem; flex: 0 0 auto; stroke: currentColor; }
.social-monogram { display: grid; width: 1.15rem; height: 1.15rem; place-items: center; border: 1px solid currentColor; border-radius: 2px; font-size: .68rem; line-height: 1; }
.social-disabled { color: #8497a9; cursor: default; border-color: rgba(255,255,255,.1); }
.social-disabled:hover { color: #8497a9; border-color: rgba(255,255,255,.1); background: transparent; }

@media (max-width: 820px) {
  .site-shell { width: min(100% - 1.5rem, 1120px); }
  .masthead { align-items: flex-start; flex-direction: column; padding-bottom: 2.5rem; }
  nav ul { gap: .2rem .75rem; }
  .hero-grid, .profile-strip, .systems-preview { grid-template-columns: 1fr; }
  .hero-note { max-width: 620px; }
  .track-grid { grid-template-columns: 1fr; }
  .resource-card { padding: 1.15rem; }
  .profile-figure { max-width: 320px; }
  .systems-preview-actions { justify-items: start; }
}

@media (max-width: 540px) {
  .site-header .site-shell { padding-block: 1rem 2.5rem; }
  .masthead { padding-bottom: 2rem; }
  nav ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); width: 100%; }
  nav a { width: 100%; padding: .45rem .3rem; border-bottom-color: rgba(255,255,255,.14); }
  .site-header h1 { font-size: clamp(2.25rem, 13vw, 3.6rem); overflow-wrap: normal; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .page-content { padding-block: 2.5rem; }
  .section-block, .profile-strip, .systems-preview { margin-bottom: 2.75rem; }
  .track-card { min-height: 0; padding: 1.3rem; }
  .contact-grid, .lab-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; align-items: start; }
  .footer-social { justify-content: flex-start; }
}

@media (max-width: 600px) {
  .resource-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}