* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; background: #f6f6f6; color: #171717; }
a { color: inherit; text-decoration: none; }

.topnav {
  background: #ffffff;
  border-bottom: 1px solid #e7e7e7;
  position: sticky;
  top: 0;
  z-index: 10;
}

.topnav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.topnav__links,
.topnav__account {
  display: flex;
  gap: 16px;
}

.app-shell,
.auth-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.page-shell__header { margin-bottom: 24px; }
.site-footer { border-top: 1px solid #e7e7e7; background: #fff; }
.site-footer__inner { max-width: 1200px; margin: 0 auto; padding: 20px; }