:root {
  --gold: #f1b300;
  --gold-soft: #f5c842;
  --gold-dim: rgba(241, 179, 0, 0.12);
  --black: #191919;
  --charcoal: #2a2a2a;
  --silver: #808080;
  --white: #ffffff;
  --bg: #f0f1f3;
  --bg-deep: #e2e3e7;
  --paper: rgba(255, 255, 255, 0.92);
  --line: rgba(25, 25, 25, 0.1);
  --ink: #191919;
  --muted: #555;
  --accent: #f1b300;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shell: 1180px;
  --serif: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  font-family: var(--sans);
  line-height: 1.55;
}

a {
  color: inherit;
  text-decoration: none;
}

.page-frame {
  min-height: 100vh;
}

.shell,
.hero,
.content-block,
.split-block,
.callout-band {
  width: min(calc(100% - 2rem), var(--shell));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--black);
  border-bottom: 2px solid var(--gold);
}

.site-header .shell,
.site-footer .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.75rem 0;
}

.brand-lockup,
.brand-home {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.brand-home {
  color: var(--white);
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.08);
}

.brand-line {
  color: var(--silver);
  font-size: 0.92rem;
}

.nav-list,
.plain-list,
.footer-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.nav-link {
  display: inline-flex;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
  transition: background-color 140ms ease, color 140ms ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  background: rgba(241, 179, 0, 0.15);
  color: var(--gold);
}

.nav-link.is-active {
  background: rgba(241, 179, 0, 0.18);
  color: var(--gold);
}

.hero {
  padding: 4rem 0 2.5rem;
}

.hero-panel {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.9fr);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.eyebrow,
.footer-kicker,
.footer-heading {
  margin: 0 0 0.85rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--serif);
  line-height: 1;
  color: var(--black);
}

h1 {
  max-width: 13ch;
  font-size: clamp(2.6rem, 6vw, 5.4rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 3rem);
}

h3 {
  font-size: 1.35rem;
  margin-bottom: 0.65rem;
}

p {
  margin: 0;
}

.hero-copy,
.section-copy,
.callout-panel p {
  max-width: 64ch;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-copy {
  margin-top: 1.25rem;
}

.hero-aside {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.hero-art {
  display: grid;
  place-items: center;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, #2b2b2b 0%, #191919 100%);
  border: 1px solid var(--charcoal);
  min-height: 220px;
}

.hero-art img {
  width: min(100%, 220px);
  height: auto;
  display: block;
}

.hero-actions,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.5rem;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition:
    background-color 140ms ease,
    border-color 140ms ease,
    color 140ms ease,
    transform 80ms ease;
}

.button:hover,
.button-secondary:hover {
  transform: translateY(-1px);
}

.button {
  background: var(--gold);
  color: var(--black);
}

.button:hover,
.button:focus-visible {
  background: var(--gold-soft);
}

.button-secondary {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--gold);
  color: #9a7300;
}

.stat-block,
.card-grid,
.compact-grid,
.split-grid {
  display: grid;
  gap: 1rem;
}

.stat-block {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
}

.stat-card,
.content-card {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid var(--line);
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.stat-card:hover,
.content-card:hover {
  border-color: rgba(241, 179, 0, 0.35);
  box-shadow: 0 4px 20px rgba(241, 179, 0, 0.08);
}

.stat-card strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.7rem;
  font-family: var(--serif);
  font-weight: 700;
  color: var(--gold);
}

.content-block,
.split-block,
.callout-band {
  padding: 2rem 0;
}

.page-intro {
  width: min(calc(100% - 2rem), var(--shell));
  margin: 0 auto;
  padding: 4rem 0 1.5rem;
}

.page-intro-panel {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.section-heading {
  max-width: 24ch;
}

.section-heading-wide {
  max-width: 32ch;
}

.section-copy {
  margin-top: 0.9rem;
}

.card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.compact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 0;
}

.tag {
  display: inline-flex;
  margin-bottom: 0.85rem;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  background: var(--gold-dim);
  color: #9a7300;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
}

.split-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.95fr);
  align-items: start;
}

.plain-list {
  display: grid;
  gap: 0.8rem;
  margin-top: 1.25rem;
}

.plain-list li {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--white);
  border: 1px solid var(--line);
}

.callout-band {
  margin: 1rem auto 4rem;
}

.callout-panel {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--black);
  color: var(--white);
  border: 1px solid var(--charcoal);
}

.callout-panel .section-heading {
  color: var(--white);
}

.callout-panel p {
  color: rgba(255, 255, 255, 0.72);
}

.callout-panel .button-secondary {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--white);
}

.callout-panel .button-secondary:hover,
.callout-panel .button-secondary:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

.site-footer {
  margin-top: 4rem;
  background: var(--black);
  border-top: 2px solid var(--gold);
  color: var(--white);
}

.presenter-grid {
  display: grid;
  gap: 1.5rem;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.course-module {
  padding: 1.4rem;
  border-radius: var(--radius-md);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.module-full {
  margin-top: 1rem;
}

.module-lead {
  margin-top: 1.5rem;
  background: linear-gradient(180deg, rgba(241, 179, 0, 0.08) 0%, var(--white) 100%);
}

.module-points {
  margin: 0.9rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.module-points li + li {
  margin-top: 0.55rem;
}

.module-follow {
  margin-top: 0.9rem;
}

.module-actions {
  margin-top: 1rem;
}

.jump-strip {
  width: min(calc(100% - 2rem), var(--shell));
  margin: 0 auto;
  padding: 0 0 1.5rem;
}

.jump-links,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.jump-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--muted);
  font-weight: 600;
  transition:
    border-color 140ms ease,
    color 140ms ease,
    transform 80ms ease,
    box-shadow 140ms ease;
}

.jump-link:hover,
.jump-link:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(241, 179, 0, 0.4);
  color: #9a7300;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.presenter-card {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.presenter-photo {
  display: grid;
  place-items: center;
  min-height: 280px;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, #efefef 0%, #dadde2 100%);
  border: 1px dashed rgba(25, 25, 25, 0.2);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-align: center;
}

.presenter-photo img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  border-radius: calc(var(--radius-md) - 2px);
  display: block;
}

.presenter-body {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.presenter-name {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.presenter-role {
  color: var(--muted);
  font-weight: 600;
}

.presenter-meta {
  display: grid;
  gap: 0.35rem;
}

.meta-label {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #9a7300;
}

.meta-copy {
  color: var(--muted);
  max-width: 70ch;
}

.footer-grid {
  align-items: start;
}

.footer-copy {
  max-width: 38ch;
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
}

.footer-list {
  display: grid;
  gap: 0.45rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-list a {
  transition: color 140ms ease;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--gold);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 600ms ease,
    transform 600ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .hero-panel,
  .split-grid,
  .card-grid,
  .compact-grid,
  .module-grid,
  .jump-links,
  .stat-block,
  .presenter-card {
    grid-template-columns: 1fr;
  }

  .site-header .shell,
  .site-footer .shell {
    flex-direction: column;
    align-items: flex-start;
  }

  h1 {
    max-width: 100%;
  }
}

@media (max-width: 680px) {
  .shell,
  .hero,
  .content-block,
  .split-block,
  .callout-band,
  .page-intro,
  .jump-strip {
    width: min(calc(100% - 1rem), var(--shell));
  }

  .hero {
    padding-top: 2rem;
  }

  .hero-panel,
  .callout-panel,
  .page-intro-panel {
    padding: 1.4rem;
  }

  .brand-home {
    align-items: center;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
  }

  .hero-art {
    min-height: 180px;
  }

  .presenter-card {
    padding: 1.1rem;
  }

  .presenter-photo {
    min-height: 220px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .button,
  .button-secondary,
  .stat-card,
  .content-card,
  .nav-link,
  .footer-list a {
    transition: none;
  }
}