:root {
  --platform-ink: #222;
  --platform-muted: #666;
  --platform-surface: #fff;
  --platform-subtle: #f5f5f5;
  --platform-border: #e8e8e8;
  --platform-max: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--platform-ink);
  background: var(--platform-surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", Arial, sans-serif;
  line-height: 1.6;
}

body {
  margin: 0;
}

.platform-shell a {
  color: inherit;
}

.platform-shell a:focus-visible,
.platform-shell button:focus-visible,
.platform-shell input:focus-visible,
.platform-shell select:focus-visible {
  outline: 3px solid #222;
  outline-offset: 3px;
}

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

.platform-skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: #fff !important;
  background: var(--platform-ink);
  transform: translateY(-200%);
}

.platform-skip-link:focus {
  transform: translateY(0);
}

.platform-header {
  border-bottom: 1px solid var(--platform-border);
  background: var(--platform-surface);
}

.platform-header__inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.platform-wordmark,
.platform-footer__wordmark {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.platform-nav,
.platform-footer__links {
  display: flex;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  gap: 12px 28px;
  list-style: none;
}

.platform-nav a,
.platform-footer__links a {
  font-size: 0.93rem;
  font-weight: 650;
  text-decoration: none;
}

.platform-hero,
.platform-page-hero {
  background: var(--platform-subtle);
}

.platform-hero__content {
  padding-block: clamp(80px, 12vw, 164px);
}

.platform-page-hero .platform-container {
  padding-block: clamp(56px, 8vw, 96px);
}

.platform-eyebrow {
  margin: 0 0 14px;
  color: #555;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.platform-hero h1,
.platform-page-hero h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 5.25rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.platform-page-hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

.platform-hero__content > p:not(.platform-eyebrow),
.platform-page-hero .platform-container > p:last-child {
  max-width: 680px;
  margin: 28px 0 0;
  color: #555;
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.platform-actions {
  display: flex;
  margin-top: 36px;
  flex-wrap: wrap;
  gap: 12px;
}

.platform-button {
  display: inline-flex;
  min-height: 48px;
  padding: 12px 22px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--platform-ink);
  font-weight: 750;
  text-decoration: none;
}

.platform-button--primary {
  color: #fff !important;
  background: var(--platform-ink);
}

.platform-button--secondary {
  background: var(--platform-surface);
}

.platform-section {
  padding-block: clamp(64px, 9vw, 112px);
}

.platform-section--subtle {
  background: var(--platform-subtle);
}

.platform-section--dark {
  color: #fff;
  background: var(--platform-ink);
}

.platform-section--dark .platform-eyebrow,
.platform-section--dark .platform-scope-grid span {
  color: #d8d8d8;
}

.platform-section__heading {
  max-width: 720px;
  margin-bottom: 36px;
}

.platform-section__heading h2,
.platform-bridge h2,
.platform-consultation h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.platform-section__heading > p:last-child,
.platform-bridge p,
.platform-consultation p {
  color: var(--platform-muted);
}

.platform-race-grid,
.platform-step-grid,
.platform-scope-grid {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
}

.platform-race-card {
  padding: 28px;
  border: 1px solid var(--platform-border);
  background: var(--platform-surface);
}

.platform-race-card__status {
  margin: 0 0 28px;
  color: #555;
  font-size: 0.8rem;
  font-weight: 800;
}

.platform-race-card h3 {
  margin: 0;
  font-size: 1.45rem;
  line-height: 1.3;
}

.platform-race-card h3 a {
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}

.platform-race-card dl {
  margin: 28px 0 0;
}

.platform-race-card dl div,
.platform-business div {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
}

.platform-race-card dt,
.platform-business dt {
  color: var(--platform-muted);
}

.platform-race-card dd,
.platform-business dd {
  margin: 0;
}

.platform-step-grid li,
.platform-scope-grid li {
  padding: 28px;
  border-top: 2px solid var(--platform-ink);
}

.platform-step-grid span {
  color: var(--platform-muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.platform-step-grid h3 {
  margin: 42px 0 8px;
}

.platform-step-grid p {
  margin: 0;
  color: var(--platform-muted);
}

.platform-bridge,
.platform-consultation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(32px, 8vw, 120px);
}

.platform-text-link {
  display: inline-block;
  margin-top: 12px;
  font-weight: 750;
  text-underline-offset: 5px;
}

.platform-registration__demo-notice {
  margin-block: 20px;
  padding: 18px 20px;
  border-left: 3px solid var(--platform-ink);
  background: var(--platform-subtle);
}

.platform-registration__demo-notice p {
  margin: 6px 0 0;
  color: var(--platform-muted);
}

.platform-scope-grid li {
  display: flex;
  border-color: #555;
  flex-direction: column;
  gap: 44px;
}

.platform-empty-state {
  padding: clamp(32px, 6vw, 64px);
  border: 1px solid var(--platform-border);
  background: var(--platform-subtle);
}

.platform-empty-state h3 {
  margin-top: 0;
  font-size: 1.5rem;
}

.platform-footer {
  padding-block: 56px;
  border-top: 1px solid var(--platform-border);
  background: var(--platform-subtle);
}

.platform-footer__inner {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 48px;
}

.platform-footer__links {
  margin-top: 24px;
}

.platform-business {
  margin: 0;
  font-size: 0.85rem;
}

.platform-business div {
  grid-template-columns: 120px 1fr;
}

.platform-business address {
  font-style: normal;
}

@media (max-width: 760px) {
  .platform-container {
    width: min(calc(100% - 32px), var(--platform-max));
  }

  .platform-header__inner {
    padding-block: 16px;
    align-items: flex-start;
    flex-direction: column;
  }

  .platform-nav {
    gap: 8px 18px;
  }

  .platform-race-grid,
  .platform-step-grid,
  .platform-scope-grid,
  .platform-bridge,
  .platform-consultation,
  .platform-footer__inner {
    grid-template-columns: 1fr;
  }

  .platform-race-card {
    padding: 24px;
  }

  .platform-business div {
    grid-template-columns: 1fr;
    gap: 0;
    margin-bottom: 10px;
  }
}