.erp-app {
  display: grid;
  grid-template-rows: var(--header-height) 1fr;
  grid-template-columns: var(--sider-width) 1fr;
  grid-template-areas:
    "header header"
    "sider main";
  height: 100vh;
}

/* ============ Header ============ */
.erp-header {
  grid-area: header;
  background: var(--color-bg-header);
  color: var(--color-text);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  font-size: var(--font-size-md);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
  z-index: 10;
}
.erp-header__brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600;
  letter-spacing: .3px;
  color: var(--color-text);
}
.erp-header__brand-mark {
  width: 28px; height: 28px;
  border-radius: var(--radius-base);
  background: linear-gradient(135deg, var(--color-primary) 0%, #14b8a6 100%);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px;
  box-shadow: var(--shadow-sm);
}
.erp-header__title { font-size: 15px; }
.erp-header__version {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: normal;
}
.erp-header__right {
  margin-left: auto;
  display: flex; align-items: center; gap: var(--space-md);
}
.erp-header__user {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding: 5px 10px;
  background: var(--color-bg);
  border-radius: var(--radius-base);
  display: flex; align-items: center; gap: 6px;
}
.erp-header__user .role {
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
}
.erp-header__action {
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--font-size-sm);
  padding: 6px 10px;
  border-radius: var(--radius-base);
  transition: all 0.15s ease;
}
.erp-header__action:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* ============ Sider ============ */
.erp-sider {
  grid-area: sider;
  background: var(--color-bg-sider);
  overflow-y: auto;
  border-right: 1px solid var(--color-border-light);
  padding: 8px 8px 24px;
}
.erp-sider::-webkit-scrollbar { width: 6px; }
.erp-sider::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 3px; }
.erp-sider::-webkit-scrollbar-track { background: transparent; }

.erp-sider__group {
  margin-top: 8px;
  border-radius: var(--radius-base);
}
.erp-sider__group-header {
  display: flex; align-items: center;
  padding: 9px 12px;
  color: #1f2937;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .3px;
  cursor: pointer;
  user-select: none;
  border-radius: var(--radius-base);
}
.erp-sider__group-header:hover { background: var(--color-bg-sider-item-hover); }
.erp-sider__group-icon {
  width: 18px; height: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  margin-right: 8px;
  font-size: 14px;
  color: var(--color-text-tertiary);
}
.erp-sider__group-arrow {
  margin-left: auto;
  font-size: 10px;
  color: var(--color-text-tertiary);
  transition: transform 0.15s ease;
}
.erp-sider__group--collapsed .erp-sider__group-arrow {
  transform: rotate(-90deg);
}
.erp-sider__group--collapsed .erp-sider__group-items { display: none; }

.erp-sider__group-items { padding: 2px 0 4px; }

.erp-sider__item {
  display: flex; align-items: center;
  padding: 7px 12px 7px 40px;
  margin: 1px 0;
  color: #1f2937;
  font-size: 14px;
  cursor: pointer;
  border-radius: var(--radius-base);
  user-select: none;
  position: relative;
  transition: all 0.12s ease;
}
.erp-sider__item:hover {
  background: var(--color-bg-sider-item-hover);
  color: #15803d;
}
.erp-sider__item--active {
  background: #dcfce7;
  color: #15803d;
  font-weight: 600;
}
.erp-sider__item--active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px; height: 100%;
  border-radius: 0;
  background: #15803d;
}

/* ============ Main ============ */
.erp-main {
  grid-area: main;
  overflow: auto;
  background: var(--color-bg);
}

.erp-breadcrumb {
  padding: 12px 24px;
  background: transparent;
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}
.erp-breadcrumb .sep { margin: 0 6px; color: var(--color-text-disabled); }
.erp-breadcrumb .last { color: var(--color-text); font-weight: 500; }

.erp-page {
  padding: 0 24px 24px;
}
.erp-page__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 16px;
}

/* ============ Login(轻量化重做) ============ */
.erp-login-page {
  height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(circle at 20% 30%, rgba(20,184,166,0.08), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(10,124,102,0.06), transparent 50%),
    #f7f8fa;
}
.erp-login-box {
  width: 380px;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 32px 36px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
}
.erp-login-box__title {
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #14b8a6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.erp-login-box__sub {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: 24px;
}
.erp-login-box .erp-form-row { margin-bottom: 12px; }
.erp-login-box .erp-form-row .erp-label { width: 70px; font-size: var(--font-size-sm); }
.erp-login-box .erp-btn { width: 100%; height: 38px; margin-top: 8px; font-size: var(--font-size-md); }
.erp-login-box__err {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--color-danger);
  padding: 8px 12px;
  font-size: var(--font-size-sm);
  margin-bottom: 12px;
  border-radius: var(--radius-base);
  display: none;
}
.erp-login-box__err.show { display: block; }
.erp-login-box__hint {
  margin-top: 16px;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-align: center;
}

/* main 区内容外包,统一 padding */
.erp-main__content {
  padding: 0 24px 24px;
}