/* Shared interaction, readability and small-screen refinements. */
:root {
  --focus-ring: 0 0 0 3px rgba(89, 133, 161, .24);
}

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 3px solid #7c9db1;
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 120;
  top: 10px;
  left: 10px;
  transform: translateY(-160%);
  border-radius: 9px;
  padding: 11px 15px;
  background: #fff;
  color: #1b2a3a;
  box-shadow: 0 8px 24px rgba(20, 40, 55, .2);
  font-size: 13px;
  font-weight: 750;
}

.skip-link:focus {
  transform: translateY(0);
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 0;
  box-shadow: var(--focus-ring) !important;
}

.page-heading p,
.section-heading p,
.form-intro,
.helper-text {
  font-size: 12px;
  line-height: 1.65;
}

.field-grid label,
.office-edit-grid label,
.teaching-form label {
  font-size: 11px;
  line-height: 1.5;
}

.field-grid input:not([type=checkbox]),
.field-grid select,
.field-grid textarea,
.stack input,
.assistant-input textarea,
.search-row input {
  min-height: 42px;
  font-size: 13px;
}

.field-grid textarea,
.assistant-input textarea {
  min-height: 104px;
}

.button {
  min-height: 44px;
}

.toast-stack {
  max-width: min(420px, calc(100vw - 32px));
}

.toast {
  font-size: 13px;
  line-height: 1.5;
}

.sidebar-backdrop {
  display: none;
}

@media (max-width: 960px) {
  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 19;
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: 0;
    padding: 0;
    background: rgba(12, 23, 32, .48);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s ease, visibility .2s ease;
  }

  .sidebar.open + .sidebar-backdrop {
    opacity: 1;
    visibility: visible;
  }

  .sidebar {
    z-index: 21;
    width: min(300px, 86vw);
    padding-top: max(24px, env(safe-area-inset-top));
    padding-bottom: max(18px, env(safe-area-inset-bottom));
  }

  .side-nav a {
    min-height: 46px;
    font-size: 14px;
  }

  .app-topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 3px 12px rgba(24, 39, 51, .035);
  }

  .menu-button {
    min-width: 42px;
    min-height: 42px;
    border-radius: 10px;
  }
}

@media (max-width: 640px) {
  .workspace-content {
    padding-top: 18px;
    padding-bottom: max(38px, env(safe-area-inset-bottom));
  }

  .page-heading {
    margin-bottom: 19px;
  }

  .page-heading h1 {
    line-height: 1.12;
  }

  .page-heading p {
    max-width: 42ch;
  }

  .heading-actions {
    width: 100%;
    flex-wrap: wrap;
  }

  .heading-actions .button {
    flex: 1 1 auto;
  }

  .surface-panel {
    border-radius: 14px;
  }

  .section-heading {
    align-items: flex-start;
  }

  .section-heading .subtle-link {
    padding: 7px 0;
    white-space: nowrap;
  }

  .field-grid input:not([type=checkbox]),
  .field-grid select,
  .field-grid textarea,
  .stack input,
  .assistant-input textarea {
    font-size: 16px;
  }

  .form-actions {
    position: sticky;
    bottom: 0;
    z-index: 4;
    margin: 14px -17px -17px;
    padding: 12px 17px max(12px, env(safe-area-inset-bottom));
    background: rgba(255, 255, 255, .96);
    border-top: 1px solid #e8eeec;
    backdrop-filter: blur(10px);
  }

  .form-actions .button {
    flex: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}