/**
 * Base layout shell — navbar + sidebar + content.
 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

[x-cloak] {
  display: none !important;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.app-body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

h1, h2, h3, h4 {
  margin: 0 0 var(--space-3);
  line-height: var(--leading-tight);
  font-weight: var(--weight-semibold);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 { font-size: var(--text-2xl); }
h2 { font-size: var(--text-xl); }
h3 { font-size: var(--text-lg); }

p { margin: 0 0 var(--space-4); }

img { max-width: 100%; height: auto; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
}

.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-rows: var(--navbar-height) 1fr;
}

.app-body-grid {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: calc(100vh - var(--navbar-height));
  transition: grid-template-columns 180ms ease;
}

.app-shell.sidebar-collapsed .app-body-grid {
  grid-template-columns: 72px 1fr;
}

.content {
  min-width: 0;
  background: var(--color-bg);
}

.main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) var(--space-12);
}

.app-footer {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.sidebar-backdrop {
  display: none;
}

.auth-main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--space-6);
  background: var(--color-bg);
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.page-header__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

.lede {
  color: var(--color-text-secondary);
  max-width: 42rem;
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
}

.toolbar {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: var(--space-5);
}

.toolbar__grow {
  flex: 1 1 16rem;
  min-width: 12rem;
}

@media (max-width: 960px) {
  .app-body-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    bottom: 0;
    width: min(var(--sidebar-width), 88vw);
    z-index: 35;
    transform: translateX(-105%);
    transition: transform var(--transition);
    box-shadow: var(--shadow-md);
  }

  .app-shell.sidebar-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    display: none;
    position: fixed;
    inset: var(--navbar-height) 0 0 0;
    background: rgb(31 41 55 / 0.35);
    z-index: 30;
    border: 0;
    cursor: pointer;
  }

  .app-shell.sidebar-open .sidebar-backdrop {
    display: block;
  }

  .main {
    padding: var(--space-5) var(--space-4) var(--space-10);
  }
}