/* 平板／小窗殼層。≥1024px 不套用，桌面左欄維持原樣。 */

.side-nav-toggle,
.side-nav-backdrop {
  display: none;
}

.side-nav-toggle {
  width: 2.35rem;
  height: 2.35rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--text);
}

.side-nav-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.side-nav-toggle-bars,
.side-nav-toggle-bars::before,
.side-nav-toggle-bars::after {
  display: block;
  width: 1.05rem;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
}

.side-nav-toggle-bars {
  position: relative;
}

.side-nav-toggle-bars::before,
.side-nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.side-nav-toggle-bars::before {
  top: -5px;
}

.side-nav-toggle-bars::after {
  top: 5px;
}

@media (max-width: 1023px) {
  .side-nav-toggle {
    display: inline-flex;
  }

  .app-shell {
    overflow-x: hidden;
  }

  .side-nav:not(.hidden) {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    height: 100dvh;
    width: min(220px, 86vw);
    z-index: 40;
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    box-shadow: none;
  }

  body.nav-open .side-nav:not(.hidden) {
    transform: translateX(0);
    box-shadow: 8px 0 28px rgba(31, 45, 54, 0.18);
  }

  .side-nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 35;
    background: rgba(31, 45, 54, 0.35);
    border: 0;
    padding: 0;
    margin: 0;
  }

  body.nav-open .side-nav-backdrop {
    display: block;
  }

  body.nav-open {
    overflow: hidden;
  }

  .split-layout,
  .split-layout.two-col,
  #view-products > .split-layout.two-col,
  .case-factory-layout,
  .review-status-layout,
  .submit-layout,
  .form-grid,
  .material-form-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  #view-products > .split-layout.two-col {
    min-height: 0;
    max-height: none;
  }

  .top-dashboard {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .shell-header-row > div:first-of-type {
    min-width: 0;
    flex: 1;
  }

  .table-scroll {
    max-width: 100%;
  }
}