/* Platform chrome + shared layout */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body.platform {
  margin: 0;
  min-height: 100vh;
  font-family: var(--w-font);
  color: var(--w-body);
  background:
    radial-gradient(ellipse 110% 70% at 50% -15%, rgba(0, 194, 255, 0.14), transparent 55%),
    linear-gradient(180deg, var(--w-base) 0%, var(--w-base-2) 42%, var(--w-base) 100%);
  line-height: 1.55;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--w-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--w-secondary);
}

a:focus-visible,
button:focus-visible,
.platform-btn:focus-visible {
  outline: none;
  box-shadow: var(--w-focus);
}

.platform-wrap {
  width: min(100% - 2rem, var(--w-max));
  margin-inline: auto;
}

.platform-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--w-primary);
  color: var(--w-base);
  padding: 0.6rem 1rem;
  font-weight: 700;
}

.platform-skip:focus {
  left: 1rem;
  top: 1rem;
}

/* Header */
.platform-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--w-line);
  background: rgba(3, 7, 13, 0.86);
  backdrop-filter: blur(12px);
}

.platform-header.is-scrolled {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.platform-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  padding: 0.5rem 0;
}

.platform-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
  flex-shrink: 0;
}

.platform-brand img {
  width: 36px;
  height: 36px;
}

.platform-brand-main {
  display: block;
  font-family: var(--w-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--w-white);
}

.platform-brand-sub {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--w-accent);
}

.platform-menu {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem 1rem;
}

.platform-menu a {
  color: var(--w-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
}

.platform-menu a:hover,
.platform-menu a[aria-current="page"] {
  color: var(--w-primary);
}

.platform-nav-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.platform-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
}

.platform-menu a:focus-visible,
.platform-footer a:focus-visible,
.home-link:focus-visible,
.about-legal a:focus-visible,
.home-faq summary:focus-visible {
  outline: none;
  box-shadow: var(--w-focus);
  border-radius: 4px;
}

.platform-btn--primary {
  background: var(--w-primary);
  color: #03070d;
}

.platform-btn--primary:hover {
  background: var(--w-secondary);
  color: #03070d;
}

.platform-btn--ghost {
  background: transparent;
  color: var(--w-body);
  border-color: rgba(255, 255, 255, 0.16);
}

.platform-btn--ghost:hover {
  border-color: var(--w-line-strong);
  color: var(--w-white);
}

.platform-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--w-line);
  border-radius: 10px;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.platform-nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--w-body);
}

/* Main shells */
.platform-main {
  padding: 2.5rem 0 4rem;
}

.platform-page-hero {
  padding: 1.5rem 0 2.5rem;
}

.platform-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--w-primary);
}

.platform-title {
  margin: 0 0 1rem;
  font-family: var(--w-display);
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.12;
  color: var(--w-white);
}

.platform-lead {
  margin: 0;
  max-width: 42rem;
  font-size: 1.05rem;
  color: var(--w-muted);
}

.platform-panel {
  margin-top: 1.5rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--w-line);
  border-radius: var(--w-radius-md);
  background: var(--w-panel);
}

.platform-panel p {
  margin: 0;
  color: var(--w-muted);
}

.platform-panel code {
  font-size: 0.85em;
  color: var(--w-accent);
}

/* Footer */
.platform-footer {
  border-top: 1px solid var(--w-line);
  padding: 2.5rem 0 2rem;
  background: rgba(0, 0, 0, 0.28);
}

.platform-footer-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr);
}

.platform-footer strong {
  color: var(--w-white);
}

.platform-footer p,
.platform-footer li {
  margin: 0.35rem 0 0;
  font-size: 0.88rem;
  color: var(--w-dim);
}

.platform-footer ul {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
}

.platform-footer a {
  color: var(--w-muted);
  text-decoration: none;
}

.platform-footer a:hover {
  color: var(--w-primary);
}

.platform-footer-meta {
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.8rem;
  color: var(--w-dim);
}

@media (max-width: 920px) {
  .platform-menu,
  .platform-nav-actions {
    display: none;
  }

  .platform-nav-toggle {
    display: inline-block;
  }

  .platform-nav.is-open .platform-menu,
  .platform-nav.is-open .platform-nav-actions {
    display: flex;
    width: 100%;
  }

  .platform-nav.is-open {
    flex-wrap: wrap;
  }

  .platform-nav.is-open .platform-menu {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.5rem 0 0.75rem;
  }

  .platform-footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 375px) {
  .platform-wrap {
    width: min(100% - 1.25rem, var(--w-max));
  }

  .platform-title {
    font-size: 1.65rem;
  }
}