* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.94), transparent 28%),
    radial-gradient(circle at 82% 18%, rgba(37, 99, 235, 0.08), transparent 18%),
    linear-gradient(180deg, #fafcff 0%, var(--bg-canvas) 100%);
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-shell {
  width: min(var(--max-marketing), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  padding-top: 18px;
  margin-bottom: 20px;
}

.site-nav,
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 430px;
  min-width: 430px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 0.98rem;
  letter-spacing: -0.02em;
}

.brand-text em {
  color: var(--muted);
  font-size: 0.74rem;
  font-style: normal;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.top-nav-right {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
}

.auth-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 138px;
  min-width: 138px;
  justify-content: flex-end;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.94rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.nav-links a:hover {
  color: var(--ink);
  transform: translateY(-1px);
}

.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.btn {
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast),
    color var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: #111827;
  color: #fff;
  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.14);
}

.btn-secondary {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

.secondary-btn {
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast),
    color var(--transition-fast);
}

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

.tiny-btn {
  min-height: 38px;
  padding: 0 12px;
  font-size: 0.9rem;
}

.auth-nav .tiny-btn {
  min-width: 138px;
}

.stage-hidden {
  display: none !important;
}

.section-label,
.eyebrow,
.sample-tag {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

@media (max-width: 760px) {
  .site-shell {
    width: min(var(--max-marketing), calc(100% - 28px));
  }

  .site-nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding: 18px 0;
  }

  .site-header {
    position: static;
    padding-top: 0;
    margin-bottom: 14px;
  }

  .brand-lockup {
    flex: 0 1 auto;
    min-width: 0;
  }

  .top-nav-right {
    width: 100%;
    justify-content: space-between;
  }

  .auth-nav {
    flex: 0 1 auto;
    min-width: 0;
  }

  .auth-nav .tiny-btn {
    min-width: 0;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px 18px;
  }
}