:root {
  --bg: #f7f7f4;
  --surface: #ffffff;
  --text: #171717;
  --muted: #666b73;
  --line: #dedfd9;
  --accent: #2457d6;
  --accent-soft: #edf2ff;
  --navy: #183153;
  --max: 980px;
  --radius: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible {
  outline: 3px solid #b7c9ff;
  outline-offset: 4px;
  border-radius: 4px;
}

.mobile-nav summary:focus-visible {
  outline: 3px solid #b7c9ff;
  outline-offset: 4px;
}

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.mono {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 247, 244, .94);
  backdrop-filter: blur(10px);
}

.nav {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.22rem;
  font-weight: 750;
  letter-spacing: -.025em;
}

.brand-logo {
  display: block;
  width: 32px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: .92rem;
}

.nav-links a:hover { color: var(--text); }

.mobile-nav {
  display: none;
  position: relative;
}

.mobile-nav summary {
  width: 42px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
  list-style: none;
}

.mobile-nav summary::-webkit-details-marker { display: none; }

.menu-icon {
  width: 20px;
  display: grid;
  gap: 4px;
}

.menu-icon span {
  display: block;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
}

.mobile-nav-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(250px, calc(100vw - 40px));
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 9px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(24, 49, 83, .14);
}

.mobile-nav-menu a {
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: .9rem;
  font-weight: 600;
}

.mobile-nav-menu a:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.hero {
  padding: 40px 0 64px;
  background:
    radial-gradient(circle at 82% 12%, rgba(36, 87, 214, .14), transparent 32%),
    var(--bg);
}

.kicker,
.section-kicker {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .08em;
  font: 700 .84rem/1.4 "SFMono-Regular", Consolas, monospace;
}

h1, h2, h3 {
  font-family: "Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
  letter-spacing: -.01em;
  font-weight: 650;
}

h1 {
  max-width: 850px;
  margin: 18px 0 20px;
  font-size: clamp(2.7rem, 6.5vw, 5.15rem);
  line-height: 1.02;
}

.hero-subtitle {
  max-width: 800px;
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.25rem, 2.5vw, 1.7rem);
  line-height: 1.45;
}

.hero-intro {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--text);
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 650;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}

.button.primary {
  border-color: var(--text);
  background: var(--text);
  color: var(--surface);
}

.button:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

section {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 30px;
  margin-bottom: 36px;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.15rem);
  line-height: 1.1;
}

.lead {
  max-width: 750px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.card-number {
  color: var(--accent);
  font: 700 .78rem/1.4 "SFMono-Regular", Consolas, monospace;
  letter-spacing: .06em;
}

.card h3 {
  margin: 12px 0 8px;
  font-size: 1.18rem;
  line-height: 1.3;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
}

.audience {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.audience-title {
  margin: 30px 0 0;
  font-size: 1.05rem;
  color: var(--text);
}

.audience span {
  padding: 8px 12px;
  background: var(--accent-soft);
  border-radius: 999px;
  color: var(--navy);
  font-size: .86rem;
  font-weight: 650;
}

.session-list {
  border-top: 1px solid var(--line);
}

.session {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.session-number {
  color: var(--accent);
  font: 750 1.25rem/1.4 "SFMono-Regular", Consolas, monospace;
}

.session h3 {
  margin: 0;
  font-size: 1.15rem;
}

.session p {
  margin: 7px 0 0;
  color: var(--muted);
}

.outcomes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 34px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: outcome;
}

.outcomes li {
  position: relative;
  padding: 17px 0 17px 42px;
  border-bottom: 1px solid var(--line);
  counter-increment: outcome;
}

.outcomes li::before {
  content: counter(outcome, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  color: var(--accent);
  font: 700 .78rem/1.4 "SFMono-Regular", Consolas, monospace;
}

.instructor {
  display: grid;
  grid-template-columns: 1fr .8fr;
  gap: 22px;
}

.instructor-card,
.contact-card {
  padding: clamp(26px, 4vw, 38px);
  border-radius: var(--radius);
}

.instructor-card {
  background: var(--surface);
  border: 1px solid var(--line);
}

.contact-card {
  background: var(--accent-soft);
}

.instructor h3 {
  margin: 0;
  font-size: 1.55rem;
}

.instructor p { margin: 12px 0 0; color: var(--muted); }

.contact-card a {
  display: inline-block;
  margin-top: 18px;
  color: var(--accent);
  font-weight: 750;
}

.contact-card a:hover { text-decoration: underline; }

footer {
  border-top: 1px solid var(--line);
  padding: 30px 0 44px;
  color: var(--muted);
  font-size: .9rem;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

@media (max-width: 840px) {
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  .nav {
    min-height: 62px;
    padding: 10px 0;
  }

  .nav-links {
    display: none;
  }

  .mobile-nav {
    display: block;
  }

  .hero { padding: 30px 0 54px; }

  .section-head,
  .instructor {
    grid-template-columns: 1fr;
  }

  .card-grid,
  .outcomes {
    grid-template-columns: 1fr;
  }

  .session {
    grid-template-columns: 44px 1fr;
    gap: 14px;
  }

}