/* Phase 9 — page layout: container, sections, top nav, breadcrumbs,
 * tenant sub-nav. */

/* App shell — body fills the viewport so the sticky nav has somewhere
 * to anchor against, and the main content area is what scrolls. */
body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-6) var(--container-pad);
  flex: 1;
}

main { width: 100%; }

/* ---------------- Top nav ---------------- */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
}
.app-nav-inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.app-nav .nav-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  color: var(--color-text);
  text-decoration: none;
}
.app-nav .nav-brand:hover { color: var(--color-text); text-decoration: none; }
.app-nav .nav-brand .brand-mark {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.02em;
}

.app-nav .nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
}
.app-nav .nav-links a {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-small);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
}
.app-nav .nav-links a:hover {
  color: var(--color-text);
  background: var(--color-surface);
  text-decoration: none;
}
.app-nav .nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.app-nav .user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}
.app-nav .user-menu .email { color: var(--color-text); font-weight: var(--font-weight-medium); }
.app-nav .user-menu a {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}
.app-nav .user-menu a:hover { color: var(--color-text); text-decoration: none; }

.app-nav .role {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-micro);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.app-nav .role-admin      { background: var(--role-admin-bg);      color: var(--role-admin-fg); }
.app-nav .role-technician { background: var(--role-technician-bg); color: var(--role-technician-fg); }
.app-nav .role-viewer     { background: var(--role-viewer-bg);     color: var(--role-viewer-fg); }

/* Hamburger toggle (CSS-only). Hidden by default; mobile.css shows it
 * below 640px. */
.nav-toggle { display: none; }
.nav-toggle-label {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: var(--radius);
  color: var(--color-text);
  user-select: none;
}
.nav-toggle-label:hover { background: var(--color-surface); }

/* ---------------- Breadcrumbs ---------------- */
.breadcrumbs {
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
}
.breadcrumbs a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--color-primary); text-decoration: underline; }
.breadcrumbs .breadcrumb-sep { color: var(--color-text-subtle); }
.breadcrumbs .breadcrumb-current {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

/* ---------------- Tenant sub-nav ---------------- */
.tenant-subnav {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
  margin: 0 0 var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}
.tenant-subnav a {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  border-bottom: 2px solid transparent;
  transition: background var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast);
}
.tenant-subnav a:hover {
  color: var(--color-text);
  background: var(--color-surface);
  text-decoration: none;
}
.tenant-subnav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-bottom-color: var(--color-primary);
}
.tenant-subnav a.active:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ---------------- Page sections ---------------- */
.page-header {
  margin: 0 0 var(--space-6);
}
.page-header h1 { margin-bottom: var(--space-2); }
.page-header .lede { color: var(--color-text-muted); font-size: var(--font-size-body); margin: 0; }

.dash-section { margin: 0 0 var(--space-8); }
.dash-section h2 { margin-bottom: var(--space-4); }
.dash-section + .dash-section { margin-top: var(--space-8); }

/* Grid helpers used by dashboard + login etc. */
.grid-3-1 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}