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

.sidebar {
  width: var(--sidebar-width);
  background: #1e1b4b;
  color: #c7d2fe;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-brand {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-brand .logo {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.sidebar-brand .title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: #a5b4fc;
  transition: all 0.2s;
  cursor: pointer;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.nav-item.active {
  background: rgba(79, 70, 229, 0.3);
  color: #fff;
  border-left-color: var(--primary);
}

.nav-item .icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
  font-size: 13px;
}

.user-name {
  font-size: 13px;
  color: #fff;
  font-weight: 500;
}

.user-role {
  font-size: 11px;
  color: #a5b4fc;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
}

.top-header {
  height: var(--header-height);
  background: var(--card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.top-header .page-title {
  font-size: 18px;
  font-weight: 600;
}

.top-header .header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-content {
  padding: 24px;
  flex: 1;
}

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e1b4b 0%, #4f46e5 50%, #7c3aed 100%);
}

.login-card {
  background: var(--card);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}

.login-card .brand {
  text-align: center;
  margin-bottom: 32px;
}

.login-card .brand .logo {
  width: 56px;
  height: 56px;
  background: var(--primary);
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 12px;
}

.login-card .brand h1 {
  font-size: 22px;
  font-weight: 700;
}

.login-card .brand p {
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 4px;
}

.login-error {
  background: #fee2e2;
  color: #991b1b;
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  display: none;
}

.login-hint {
  text-align: center;
  margin-top: 20px;
  font-size: 12px;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .main-content {
    margin-left: 0;
  }
}