html, body { margin: 0; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  overflow-x: clip;
  background: var(--sv-paper);
  color: var(--sv-pitch);
  font-family: var(--sv-font-body);
  font-size: var(--sv-text-body);
  line-height: 1.55;
}
h1, h2, h3, p { margin: 0; }
h1, h2, h3 {
  font-family: var(--sv-font-display);
  letter-spacing: -0.035em;
}
a { color: inherit; }
.container { width: min(1180px, calc(100% - 112px)); margin: 0 auto; }
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--sv-pitch);
  color: var(--sv-paper);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--sv-paper) 92%, transparent);
  border-bottom: 1px solid var(--sv-ash);
  backdrop-filter: blur(14px);
}
.nav-row {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
}
.nav-brand, .nav-links, .nav-actions, .nav-mark-group {
  display: flex;
  align-items: center;
}
.nav-brand { gap: 40px; }
.nav-links { gap: 28px; }
.nav-actions { gap: 16px; }
.nav-mark-group { gap: 8px; text-decoration: none; }
.nav-mark { width: 22px; height: 22px; }
.nav-wordmark {
  font-family: var(--sv-font-display);
  font-size: var(--sv-text-h2);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.05em;
}
.nav-wordmark-dot { color: var(--sv-volt); }
.nav-link, .nav-login {
  font-size: var(--sv-text-body);
  font-weight: 600;
  text-decoration: none;
}
.nav-link:hover, .nav-login:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}
.nav-link[aria-current="page"] {
  text-decoration: underline;
  text-decoration-color: var(--sv-volt);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}
.btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: var(--sv-radius-sm);
  font-weight: 700;
  text-decoration: none;
  transition: transform var(--sv-dur-tap) var(--sv-ease), background var(--sv-dur-tap) var(--sv-ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--sv-volt); color: var(--sv-pitch); }
.btn-ghost { border-color: var(--sv-pitch); background: transparent; }
.btn-light { border-color: var(--sv-paper); color: var(--sv-paper); }
.btn:focus-visible, .nav-link:focus-visible, .nav-login:focus-visible,
.card-link:focus-visible, .path-card:focus-visible, summary:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 3px;
}
.nav-start { min-height: 40px; padding-inline: 16px; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 24px;
  color: var(--sv-stone);
  font-size: var(--sv-text-small);
}
.breadcrumb a { text-underline-offset: 3px; }
.hero { padding: 48px 0 76px; border-bottom: 1px solid var(--sv-ash); }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
  gap: 64px;
  align-items: center;
}
.eyebrow, .section-kicker {
  color: var(--sv-stone);
  font-size: var(--sv-text-micro);
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
}
.eyebrow { margin-bottom: 20px; }
h1 {
  max-width: 760px;
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 800;
  line-height: .94;
}
.hero-script {
  display: block;
  margin-top: 10px;
  color: var(--sv-volt);
  font-family: var(--sv-font-script);
  font-size: .68em;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1;
}
.hero-lede {
  max-width: 700px;
  margin-top: 28px;
  color: var(--sv-stone);
  font-size: var(--sv-text-lede);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-note { margin-top: 18px; color: var(--sv-stone); font-size: var(--sv-text-small); }

.brief-board {
  overflow: hidden;
  border: 1px solid var(--sv-pitch);
  border-radius: var(--sv-radius-lg);
  background: var(--sv-paper-card);
  box-shadow: 12px 12px 0 var(--sv-paper-band);
}
.brief-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--sv-ash);
  font-size: var(--sv-text-small);
}
.brief-top span { color: var(--sv-stone); }
.brief-row {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 14px;
  align-items: center;
  min-height: 68px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--sv-ash);
}
.brief-row small {
  color: var(--sv-muted);
  font-size: var(--sv-text-micro);
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.brief-row strong { font-family: var(--sv-font-display); }
.brief-row b { color: var(--sv-volt); font-size: 24px; }
.brief-result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 18px;
  background: var(--sv-pitch);
  color: var(--sv-paper);
}
.brief-result span { display: block; color: var(--sv-paper-70); font-size: var(--sv-text-small); }
.mail-mark { width: 34px; height: 34px; flex: 0 0 34px; }

.section { padding: 88px 0; }
.section-band { background: var(--sv-paper-band); }
.section-dark { background: var(--sv-pitch); color: var(--sv-paper); }
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
  gap: 48px;
  align-items: end;
  margin-bottom: 42px;
}
.section-kicker { margin-bottom: 12px; }
.section h2 {
  max-width: 780px;
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 800;
  line-height: .98;
}
.section-intro { color: var(--sv-stone); font-size: var(--sv-text-lede); }
.section-dark .section-kicker, .section-dark .section-intro { color: var(--sv-paper-70); }

.audience-grid, .use-grid, .continuation-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.audience-card, .use-card {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--sv-paper-edge);
  border-radius: var(--sv-radius-md);
  background: var(--sv-paper-card);
}
.audience-card--optional {
  border-style: dashed;
  background: transparent;
}
.card-label {
  display: block;
  margin-bottom: 32px;
  color: var(--sv-stone);
  font-size: var(--sv-text-micro);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.audience-card h3, .use-card h3, .path-card h3, .continuation-card h3 {
  font-size: var(--sv-text-h2);
  line-height: 1.05;
}
.audience-card p, .use-card p, .path-card p, .continuation-card p {
  margin-top: 14px;
  color: var(--sv-stone);
}
.card-link {
  display: inline-block;
  margin-top: 24px;
  font-weight: 700;
  text-underline-offset: 4px;
}
.use-card { min-height: 270px; display: flex; flex-direction: column; }
.use-card .card-link { margin-top: auto; padding-top: 24px; }

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--sv-paper-40);
}
.path-card {
  min-width: 0;
  padding: 28px;
  border-right: 1px solid var(--sv-paper-40);
  color: inherit;
  text-decoration: none;
}
.path-card:last-child { border-right: 0; }
.path-card span {
  display: block;
  margin-bottom: 44px;
  color: var(--sv-volt);
  font-family: var(--sv-font-display);
  font-size: var(--sv-text-h2);
  font-weight: 800;
}
.path-card p { color: var(--sv-paper-70); }

.continuation-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.continuation-card {
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--sv-paper-edge);
  border-radius: var(--sv-radius-md);
  background: var(--sv-paper-card);
  color: inherit;
  text-decoration: none;
}
.continuation-card:hover { border-color: var(--sv-pitch); }
.continuation-card b {
  display: block;
  margin-bottom: 30px;
  color: var(--sv-volt);
  font-family: var(--sv-font-display);
}

.guide-list {
  display: grid;
  gap: 12px;
  counter-reset: guide;
}
.guide-step {
  counter-increment: guide;
  display: grid;
  grid-template-columns: 72px 1fr minmax(220px, 360px);
  gap: 22px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--sv-paper-edge);
  background: var(--sv-paper-card);
}
.guide-step::before {
  content: counter(guide, decimal-leading-zero);
  color: var(--sv-volt);
  font-family: var(--sv-font-display);
  font-size: var(--sv-text-h2);
  font-weight: 800;
}
.guide-step h3 { font-size: var(--sv-text-h2); }
.guide-step p { color: var(--sv-stone); }

.faq-list { display: grid; gap: 12px; }
details {
  border: 1px solid var(--sv-paper-edge);
  border-radius: var(--sv-radius-sm);
  background: var(--sv-paper-card);
}
summary {
  cursor: pointer;
  padding: 22px 24px;
  font-family: var(--sv-font-display);
  font-size: var(--sv-text-h3);
  font-weight: 700;
}
details p { max-width: 840px; padding: 0 24px 24px; color: var(--sv-stone); }
.section-cta { padding: 72px 0; text-align: center; }
.section-cta h2 { margin-inline: auto; }
.section-cta p { max-width: 680px; margin: 18px auto 0; color: var(--sv-paper-70); }
.section-cta .hero-actions { justify-content: center; }

.footer { padding: 42px 0; border-top: 1px solid var(--sv-ash); }
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer a { color: var(--sv-stone); font-size: var(--sv-text-small); }

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .brief-board { max-width: 680px; }
  .continuation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .container { width: min(100% - 40px, 1180px); }
  .nav-row { min-height: 64px; padding: 0 20px; }
  .nav-links, .nav-login, .nav-start { display: none; }
  .hero { padding: 32px 0 56px; }
  .hero-grid { gap: 40px; }
  h1 { font-size: clamp(44px, 14vw, 60px); }
  .hero-lede { font-size: var(--sv-text-body); }
  .brief-board { box-shadow: 7px 7px 0 var(--sv-paper-band); }
  .brief-row { grid-template-columns: 60px 1fr auto; padding-inline: 14px; }
  .section { padding: 64px 0; }
  .section-head { grid-template-columns: 1fr; gap: 18px; margin-bottom: 30px; }
  .section h2 { font-size: clamp(36px, 11vw, 48px); }
  .section-intro { font-size: var(--sv-text-body); }
  .audience-grid, .use-grid, .continuation-grid, .path-grid { grid-template-columns: 1fr; }
  .path-card { border-right: 0; border-bottom: 1px solid var(--sv-paper-40); }
  .path-card:last-child { border-bottom: 0; }
  .path-card span, .continuation-card b { margin-bottom: 18px; }
  .use-card { min-height: 0; }
  .guide-step { grid-template-columns: 52px 1fr; }
  .guide-step p { grid-column: 2; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}