.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 230px;
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
}

.sidebar .brand {
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 24px;
  padding: 0 6px;
}
.sidebar .brand span { color: var(--color-primary); }

.sidebar nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.sidebar nav a {
  color: var(--color-text-dim);
  padding: 9px 10px;
  border-radius: 8px;
  font-size: .9rem;
  text-decoration: none;
}
.sidebar nav a:hover { background: var(--color-surface-alt); color: var(--color-text); }
.sidebar nav a.active { background: var(--color-primary); color: #1a1206; font-weight: 700; }

.sidebar .logout-btn {
  margin-top: auto;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-dim);
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
}
.sidebar .logout-btn:hover { color: var(--color-text); }

.main {
  flex: 1;
  min-width: 0;
  padding: 24px 28px;
}

.main-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 22px;
  flex-wrap: wrap;
  gap: 10px;
}

.center-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
}

.mobile-page {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 16px 60px;
  min-height: 100vh;
}

@media (max-width: 820px) {
  .app-shell { flex-direction: column; }
  .sidebar {
    width: 100%;
    flex-direction: row;
    align-items: center;
    padding: 10px 14px;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  .sidebar .brand { margin-bottom: 0; margin-right: 14px; white-space: nowrap; }
  .sidebar nav { flex-direction: row; }
  .sidebar nav a { white-space: nowrap; }
  .sidebar .logout-btn { margin-top: 0; margin-left: 10px; white-space: nowrap; }
  .main { padding: 18px; }
}