@media (max-width: 900px) {
  :root {
    --footer-height: 142px;
  }

  .brand-copy small {
    display: none;
  }

  .header-status,
  .header-login-label {
    display: none;
  }

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

  .courses-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    justify-content: center;
    gap: 10px;
    padding-block: 18px;
    text-align: center;
  }

  .footer-copy {
    justify-content: center;
  }
}

@media (max-width: 620px) {
  :root {
    --header-height: 74px;
    --footer-height: 184px;
  }

  .header-inner {
    width: min(100% - 24px, var(--content-width));
    gap: 8px;
  }

  .brand-lockup {
    gap: 8px;
  }

  .brand-icon {
    flex-basis: 34px;
    width: 34px;
    height: 34px;
  }

  .brand-icon svg {
    width: 21px;
    height: 21px;
  }

  .brand-copy strong {
    max-width: 190px;
    white-space: normal;
    font-size: 0.76rem;
    line-height: 1.35;
  }

  .header-student-name {
    max-width: 82px;
  }

  .header-student-name svg {
    display: none;
  }

  .logout-button {
    padding: 7px 9px;
  }

  .logout-button span {
    display: none;
  }

  .sound-toggle {
    flex-basis: 34px;
    width: 34px;
    min-height: 34px;
  }

  .mock-banner {
    justify-content: space-between;
    gap: 7px;
    font-size: 0.66rem;
  }

  .mock-banner-text span:not(strong) {
    display: none;
  }

  .mock-toggle {
    padding-inline: 8px;
    font-size: 0.62rem;
  }

  .login-page {
    padding: 24px 12px;
  }

  .login-card {
    padding: 30px 22px 23px;
  }

  .login-emblem {
    width: 50px;
    height: 50px;
  }

  .login-emblem svg {
    width: 48px;
    height: 48px;
  }

  .login-card h1 {
    font-size: 1.52rem;
  }

  .login-card-head > p {
    font-size: 0.78rem;
  }

  .login-field,
  .course-search,
  .login-submit {
    min-height: 50px;
  }

  .connection-panel {
    grid-template-columns: auto 1fr;
  }

  .connection-panel .compact-button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .student-page,
  .success-page {
    width: min(100% - 24px, var(--content-width));
    padding-top: 20px;
  }

  .student-identity-card {
    padding: 22px 18px;
  }

  .student-title-row {
    flex-direction: column;
  }

  .student-card-status {
    width: 100%;
  }

  .student-details-grid {
    grid-template-columns: 1fr 1fr;
  }

  .student-detail {
    padding: 10px;
  }

  .student-detail strong {
    font-size: 0.68rem;
  }

  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .summary-card {
    min-height: 94px;
    padding: 14px;
  }

  .summary-card strong {
    font-size: 1.72rem;
  }

  .content-card {
    padding: 19px 16px;
  }

  .progress-heading,
  .section-heading,
  .receipt-heading,
  .save-card {
    align-items: flex-start;
  }

  .selection-counter {
    font-size: 1.2rem;
  }

  .course-card {
    min-height: 92px;
    padding: 16px 56px 14px 14px;
  }

  .receipt-heading {
    flex-direction: column;
    gap: 9px;
  }

  .receipt-drop {
    min-height: 190px;
    padding: 20px 14px;
  }

  .save-card {
    flex-direction: column;
  }

  .save-button {
    width: 100%;
    min-width: 0;
  }

  .success-card {
    padding: 28px 18px;
  }

  .success-courses {
    grid-template-columns: 1fr;
  }

  .footer-copy {
    display: grid;
    gap: 3px;
  }

  .footer-copy span::after,
  .footer-copy strong::after {
    content: none;
  }

  .modal {
    padding: 12px;
  }

  .modal-card {
    max-height: 88dvh;
    padding: 23px 18px;
  }

  .modal-actions {
    flex-direction: column-reverse;
  }

  .modal-actions button {
    width: 100%;
  }
}

@media (max-width: 390px) {
  :root {
    --preview-height: 58px;
  }

  .brand-copy strong {
    max-width: 150px;
    font-size: 0.7rem;
  }

  .header-student-name {
    display: none;
  }

  .student-details-grid {
    grid-template-columns: 1fr;
  }

  .summary-card span {
    font-size: 0.65rem;
  }

  .content-card {
    padding-inline: 13px;
  }

  .course-card {
    padding-inline-end: 52px;
  }
}

@media (prefers-contrast: more) {
  :root {
    --border: #91a89c;
    --text-muted: #44564f;
  }

  .course-card,
  .login-field,
  .course-search {
    border-color: #6e8c7d;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .login-submit:hover:not(:disabled),
  .primary-button:hover:not(:disabled),
  .course-card:hover:not(:disabled),
  .receipt-drop.dragging {
    transform: none;
  }
}


@media (max-width: 1180px) {
  .admin-stat-grid { grid-template-columns: repeat(3,minmax(130px,1fr)); }
  .admin-toolbar { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .admin-toolbar > :first-child { grid-column: 1/-1; }
  .source-correction-search { grid-template-columns:minmax(0,1fr) minmax(180px,.45fr) auto; }
  .source-correction-search > :first-child { grid-column:auto; }
}

@media (max-width: 900px) {
  .site-nav { margin-inline-start: 5px; }
  .header-nav-button { padding: 0 9px; }
  .admin-entry-button span,
  .header-account-button,
  .header-admin-identity small { display:none; }
  .admin-entry-button { width:42px; justify-content:center; padding:0; }
  .header-admin-identity { max-width:125px; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-menu-toggle { display:grid; place-items:center; }
  .admin-sidebar { position:fixed; z-index:1100; top:0; right:0; bottom:0; width:min(84vw,300px); max-height:none; border-radius:0; transform:translateX(105%); transition:transform .25s ease; }
  .admin-sidebar.is-open { transform:none; }
  .admin-navigation { padding-top:20px; }
  .admin-dashboard-grid { grid-template-columns:1fr; }
  .admin-receipt-grid { grid-template-columns:1fr; }
}

@media (max-width: 620px) {
  .brand-lockup { min-width:0; }
  .site-nav { order:3; }
  .header-nav-button { min-height:36px; font-size:.76rem; }
  .header-admin-identity { max-width:88px; }
  .admin-view { padding:14px 10px 28px; }
  .admin-account-strip { align-items:flex-start; padding:14px; }
  .admin-scope-summary { display:grid; justify-items:end; text-align:left; font-size:.78rem; }
  .admin-section-header { align-items:flex-start; padding:16px; }
  .admin-section-actions { width:100%; margin-inline-start:0; }
  .admin-section-content { padding:13px; }
  .admin-stat-grid { grid-template-columns:repeat(2,minmax(0,1fr)); gap:9px; }
  .admin-stat-card { min-height:108px; padding:14px 12px; }
  .admin-toolbar { grid-template-columns:1fr; }
  .admin-toolbar > :first-child { grid-column:auto; }
  .admin-table-wrap { display:none; }
  .admin-mobile-records { display:grid; }
  .admin-chart-grid,
  .admin-form-grid { grid-template-columns:1fr; }
  .admin-form-grid .full { grid-column:auto; }
  .admin-login-card,
  .admin-dialog-card,
  .admin-detail-card { padding:24px 18px 20px; }
  .admin-detail-grid { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .admin-login-actions { flex-direction:column; }
  .source-correction-intro { align-items:flex-start; padding:14px; }
  .source-correction-icon { flex-basis:44px; width:44px; height:44px; }
  .source-correction-check-grid { grid-template-columns:1fr; }
  .source-correction-change { grid-template-columns:1fr; text-align:center; }
  .source-correction-arrow { transform:rotate(-90deg); }
  .source-correction-actions { display:grid; grid-template-columns:1fr; }
  .source-correction-actions button,
  .source-correction-success .primary-button { width:100%; min-width:0; }
}

@media (max-width: 360px) {
  .header-nav-button { display:none; }
  .admin-stat-grid { grid-template-columns:1fr; }
  .admin-mock-bar { align-items:flex-start; flex-wrap:wrap; }
  .admin-mock-bar button { margin-inline-start:0; width:100%; }
  .admin-detail-grid { grid-template-columns:1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .admin-sidebar,
  .admin-login-card,
  .admin-dialog-card,
  .admin-detail-card,
  .header-nav-button,
  .admin-entry-button,
  .header-account-button { animation:none; transition:none; transform:none; }
}

@media (prefers-contrast: more) {
  .admin-workspace,
  .admin-sidebar,
  .admin-stat-card,
  .admin-panel,
  .admin-login-card,
  .admin-dialog-card,
  .admin-detail-card { border-width:2px; }
}