/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 252, 248, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.navbar.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.navbar__logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--ink);
  text-decoration: none;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.navbar__menu {
  display: flex;
  list-style: none;
  gap: 24px;
  margin: 0;
  padding: 0;
}

.navbar__menu a,
.navbar__link {
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}

.navbar__menu a:hover,
.navbar__link:hover,
.navbar__menu a.is-active { color: var(--ink); }

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.navbar__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
}

/* Layout wrappers */
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.wrap--narrow { max-width: 780px; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Proof ticker */
.proof-bar {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  padding: 12px 0;
}

.proof-bar__track {
  display: flex;
  gap: 48px;
  animation: ticker 30s linear infinite;
  white-space: nowrap;
}

.proof-bar__track span {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
  margin-top: 64px;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
  flex-wrap: wrap;
}

.footer__copy { font-size: 13px; color: var(--ink-3); margin-top: 12px; }

.footer__menu {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer__menu a { color: var(--ink-2); font-size: 14px; }

/* Responsive */
@media (max-width: 1100px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  section { padding: 72px 0; }
  .walkthrough-layout { grid-template-columns: 1fr !important; }
}

@media (max-width: 768px) {
  .navbar__toggle { display: flex; }
  .navbar__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    padding: 24px;
  }
  .navbar.nav-open .navbar__links { display: flex; }
  .navbar__cta { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  .card { padding: 20px; }
}