/* Shared page layout */
.page-main {
  flex: 1;
  width: 100%;
  min-width: 0;
  min-height: 0;
  overflow-x: hidden;
}

.page-main .container,
.page-main .section {
  max-width: 100%;
}

@media (max-width: 768px) {
  .page-main .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-main .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

@media (max-width: 480px) {
  .page-main .section {
    padding-left: 12px;
    padding-right: 12px;
  }

  .page-main .container {
    padding-left: 12px;
    padding-right: 12px;
  }
}

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

/* Keep injected header sticky when scrolling */
#site-header {
  position: sticky;
  top: 0;
  z-index: 10000;
  width: 100%;
  flex-shrink: 0;
}

/* Login: full-viewport split layout without clipping */
body[data-page="login"] {
  overflow-x: hidden;
  overflow-y: auto;
}

body[data-page="login"] .page-main.page-login {
  padding: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

body[data-page="login"] .page-main.page-login .shell {
  flex: 1;
  min-height: calc(100vh - 84px);
  height: auto;
}

body[data-page="login"] html,
body[data-page="login"] {
  height: auto;
  min-height: 100%;
}

/* Demo: dark preview canvas */
body[data-page="demo"] {
  background: #0f172a;
  color: #f8fafc;
}

body[data-page="demo"] .page-main.page-demo {
  background: #0f172a;
  color: #f8fafc;
}

@media (max-width: 768px) {
  body[data-page="login"] .page-main.page-login .shell {
    min-height: auto;
    grid-template-columns: 1fr;
  }
}