/* App shell: sidebar 260 px + topbar 56 px; below 1024 px the sidebar is an off-canvas drawer. */
.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  min-height: 100vh;
  min-height: 100dvh;
}

.app-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* Sidebar */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: var(--z-sidebar);
  width: min(var(--sidebar-width), 86vw);
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-right: 1px solid var(--border);
  transform: translateX(-100%);
  visibility: hidden;
  transition: transform var(--duration) var(--ease), visibility 0s linear var(--duration);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.sidebar.is-open {
  transform: none;
  visibility: visible;
  transition: transform var(--duration) var(--ease), visibility 0s;
  box-shadow: var(--shadow-float);
}

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-sidebar) - 1);
  background: rgba(17, 24, 39, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration) var(--ease), visibility 0s linear var(--duration);
}
.sidebar-backdrop.is-open { opacity: 1; visibility: visible; transition: opacity var(--duration) var(--ease), visibility 0s; }

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  height: var(--topbar-height);
  padding: 0 var(--space-4) 0 var(--space-5);
  border-bottom: 1px solid var(--border);
  flex: none;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--touch);
  color: var(--text);
  font-size: var(--text-base);
  font-weight: 650;
  letter-spacing: -0.01em;
  min-width: 0;
}
.logo:hover { color: var(--text); text-decoration: none; }
.logo .icon { color: var(--primary); width: 22px; height: 22px; }
.logo-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.sidebar-brand { padding: var(--space-3) var(--space-3) var(--space-2); flex: none; }

.sidebar-nav { flex: 1; padding: var(--space-2) var(--space-3) var(--space-4); }

.nav-group + .nav-group { margin-top: var(--space-5); }
.nav-group-title {
  padding: 0 var(--space-3);
  margin-bottom: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-list { display: grid; gap: 2px; }

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--touch);
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-strong);
  font-weight: 500;
  transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease);
}
.nav-link .icon { color: var(--gray-500); transition: color var(--duration) var(--ease); }
.nav-link:hover { background: var(--gray-100); color: var(--text); text-decoration: none; }
.nav-link:hover .icon { color: var(--text-strong); }
.nav-link[aria-current="page"] { background: var(--primary-subtle); color: var(--primary-hover); }
.nav-link[aria-current="page"] .icon { color: var(--primary); }
.nav-link[aria-disabled="true"] { color: var(--text-muted); cursor: not-allowed; }
.nav-link[aria-disabled="true"]:hover { background: transparent; color: var(--text-muted); }
.nav-link[aria-disabled="true"] .icon { color: var(--gray-400); }
.nav-label { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-soon {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-muted);
  background: var(--gray-100);
  padding: 2px var(--space-2);
  border-radius: 999px;
}

.sidebar-foot {
  flex: none;
  padding: var(--space-3) var(--space-5) var(--space-4);
  border-top: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: var(--topbar-height);
  padding: 0 var(--space-3);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar-start { display: flex; align-items: center; gap: var(--space-1); min-width: 0; flex: 1; }
.topbar-end { display: flex; align-items: center; gap: var(--space-1); flex: none; }

.topbar-search { display: none; position: relative; width: 280px; margin-right: var(--space-2); }
.topbar-search .icon { position: absolute; left: var(--space-3); top: 50%; transform: translateY(-50%); color: var(--gray-500); width: 16px; height: 16px; pointer-events: none; }
.topbar-search input {
  width: 100%;
  height: 36px;
  padding: 0 var(--space-3) 0 var(--space-8);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--gray-50);
  color: var(--text);
}
.topbar-search input::placeholder { color: var(--text-muted); opacity: 1; }
.topbar-search input:disabled { cursor: not-allowed; }

.lang-form { margin: 0; }

.user-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--touch);
  padding: 0 var(--space-2);
  background: transparent;
  border: 0;
  border-radius: var(--radius-md);
  color: var(--text);
}
.user-button:hover { background: var(--gray-100); }
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: var(--gray-100);
  border: 1px solid var(--border);
  color: var(--text-strong);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
}
.user-name { display: none; max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }

/* Breadcrumbs */
.breadcrumbs { min-width: 0; }
.breadcrumbs ol { display: flex; align-items: center; gap: var(--space-1); min-width: 0; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: var(--space-1); min-width: 0; color: var(--text-muted); }
.breadcrumbs li:not(:last-child) { display: none; }
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--text); }
.breadcrumbs [aria-current="page"] { color: var(--text); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.breadcrumbs .icon { width: 14px; height: 14px; color: var(--gray-400); }

/* Main */
.main { flex: 1; min-width: 0; padding: var(--space-5) var(--space-4) var(--space-12); }
.container { width: 100%; max-width: var(--content-max); margin-inline: auto; }
.container-narrow { max-width: 720px; }
.container-medium { max-width: var(--content-medium); }
/* Form and settings pages: keep a readable line length even on wide screens. */
.route-brands-create .container, .route-brands-edit .container, .route-brands-domain .container,
.route-brands-ses .container, .route-brands-sending .container, .route-admin-ses .container,
.route-admin-settings .container, .route-profile .container, .route-profile-2fa .container,
.route-campaigns-create .container, .route-campaigns-send .container, .route-templates-create .container,
.route-templates-edit .container, .route-forms-create .container, .route-forms-edit .container,
.route-imports-create .container, .route-imports-map .container { max-width: var(--content-medium); margin-inline: 0; }

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3) var(--space-6);
  margin-bottom: var(--space-6);
}
.page-header-text { min-width: 0; display: grid; gap: var(--space-1); }
.page-subtitle { color: var(--text-muted); font-size: var(--text-sm); }
.page-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

.stack { display: grid; gap: var(--space-6); }
.stack-sm { display: grid; gap: var(--space-4); }

@media (min-width: 640px) {
  .main { padding: var(--space-6) var(--space-6) var(--space-12); }
  .topbar { padding: 0 var(--space-5); }
  .topbar-search { display: block; }
  .user-name { display: block; }
}

@media (min-width: 768px) {
  .breadcrumbs li:not(:last-child) { display: inline-flex; }
}

@media (min-width: 1024px) {
  .app { grid-template-columns: var(--sidebar-width) minmax(0, 1fr); }
  .sidebar {
    position: sticky;
    inset: auto;
    top: 0;
    height: 100vh;
    height: 100dvh;
    width: auto;
    transform: none;
    visibility: visible;
    box-shadow: none;
  }
  .icon-btn.sidebar-close, .icon-btn.sidebar-toggle, .sidebar-backdrop { display: none; }
  .main { padding: var(--space-8) var(--space-8) var(--space-16); }
  .topbar { padding: 0 var(--space-8); }
}