/* Page shell + shared layout utilities */

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

main.page-main {
  flex: 1;
  padding-block: var(--space-6) var(--space-8);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.site-header__logo {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-header__auth {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
}

.site-footer__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.site-footer__copy {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.site-footer__links {
  display: flex;
  gap: var(--space-4);
}

.site-footer__links a {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 600;
}

.site-footer__links a:hover {
  color: var(--color-text);
  text-decoration: underline;
}

/* Generic stacks */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.stack--sm { gap: var(--space-2); }
.stack--lg { gap: var(--space-6); }

.row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.row--wrap { flex-wrap: wrap; }
.row--between { justify-content: space-between; }

@media (min-width: 640px) {
  .container { padding: 0 var(--space-6); }
}