/*
 * RC7 — authoritative frontend layout layer.
 *
 * This file intentionally owns the application shell, workspace, detail panel,
 * key responsive breakpoints and native control normalization. Earlier split
 * stylesheets remain component fallbacks, while every release-critical layout
 * rule is consolidated here to avoid an accumulating override chain.
 */

:root {
  --ui-1: .25rem;
  --ui-2: .5rem;
  --ui-3: .75rem;
  --ui-4: 1rem;
  --ui-5: 1.5rem;
  --ui-6: 2rem;
  --ui-8: 3rem;
  --ui-control: 2.75rem;
  --ui-page-max: 120rem;
  --ui-page-gutter: clamp(.75rem, 2vw, 2.25rem);
  --ui-panel-gap: clamp(.75rem, 1.1vw, 1.25rem);
  --ui-rail: clamp(14.5rem, 17vw, 16.5rem);
  --ui-drawer: clamp(25rem, 34vw, 31rem);
  --ui-wide-detail: clamp(25rem, 26vw, 31rem);
  --ui-header-offset: calc(var(--header-height) + var(--ui-4));
}

html {
  min-width: 0;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-width: 0;
  overflow-wrap: break-word;
}

*,
*::before,
*::after {
  min-width: 0;
}

button,
input,
select,
textarea {
  max-width: 100%;
  font: inherit;
  color: inherit;
}

button {
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
}

button,
summary,
.filter-chip,
.rail-stat,
.attention-row,
.viewer-metric,
.guest-row__open {
  touch-action: manipulation;
}

/* Normalize native iOS button-blue only on light-surface controls.
   Dark operational rail controls receive an explicit inverse palette below. */
.attention-row,
.attention-row:hover,
.attention-row:focus-visible,
.attention-row:active,
.viewer-metric,
.viewer-kit-grid button,
.viewer-priority-row button {
  color: var(--ink-950);
  -webkit-text-fill-color: currentColor;
}

.attention-row > span {
  color: inherit;
  -webkit-text-fill-color: currentColor;
}

/* RC9: authoritative dark-rail contrast.
   Do not let the global form-control reset turn white text black. */
.rail-summary,
.rail-summary .rail-stat,
.rail-summary .rail-extra button {
  color: var(--white);
  -webkit-text-fill-color: currentColor;
}

.rail-summary .rail-stat strong,
.rail-summary .rail-extra strong {
  color: var(--white);
  -webkit-text-fill-color: var(--white);
}

.rail-summary .rail-stat span,
.rail-summary .rail-stat small,
.rail-summary .rail-extra span,
.rail-summary .rail-extra small {
  color: rgba(255, 254, 250, .68);
  -webkit-text-fill-color: rgba(255, 254, 250, .68);
}

.rail-summary .rail-stat[aria-pressed="true"],
.rail-summary .rail-extra button[aria-pressed="true"] {
  color: var(--white);
  -webkit-text-fill-color: var(--white);
}

.app-main,
.header-row {
  width: min(100%, var(--ui-page-max));
  margin-inline: auto;
  padding-inline: var(--ui-page-gutter);
}

.header-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--ui-4);
}

.event-lockup,
.event-copy,
.header-controls,
.operator-button,
.operator-text {
  min-width: 0;
}

.event-copy h1,
.operator-text strong,
.operator-text small {
  overflow-wrap: anywhere;
}

/* -------------------------------------------------------------------------- */
/* Core workspace: two columns on normal desktops; detail is a right drawer.  */
/* Three fixed columns are only enabled on genuinely wide displays.            */
/* -------------------------------------------------------------------------- */

.operations-shell {
  display: grid;
  height: var(--workspace-height);
  min-height: 0;
  grid-template-columns: var(--ui-rail) minmax(0, 1fr);
  align-items: stretch;
  gap: var(--ui-panel-gap);
}

/* Viewer has no operational rail. It must always own the full workspace width;
   sharing the operator two-column template would strand the Viewer list inside
   the rail-sized first track. */
body.client-mode .operations-shell:not(.viewer-list-hidden) {
  display: grid;
  height: var(--workspace-height);
  min-height: 0;
  grid-template-columns: minmax(0, 1fr);
  align-items: stretch;
  gap: 0;
}

.left-rail {
  position: sticky;
  top: var(--workspace-top);
  display: grid;
  height: var(--workspace-height);
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  align-content: start;
  gap: var(--ui-3);
  scrollbar-width: thin;
}

.workspace-card,
body.client-mode .workspace-card {
  display: grid;
  width: 100%;
  height: var(--workspace-height);
  min-height: 0;
  overflow: hidden;
  grid-template-rows: auto auto minmax(0, 1fr);
  border-top-width: .25rem;
  border-radius: 1rem;
}

/* Overlay host occupies the viewport, but does not intercept events while the
   detail is closed. */
body:not(.client-mode) .guest-panel-host,
body.client-mode .guest-panel-host {
  position: fixed;
  z-index: 1760;
  inset: 0;
  display: block;
  width: auto;
  height: auto;
  overflow: visible;
  pointer-events: none;
}

body:not(.client-mode) .guest-panel-placeholder,
body.client-mode .guest-panel-placeholder {
  display: none;
}

.guest-panel {
  position: absolute;
  inset: 0;
  height: auto;
  pointer-events: auto;
}

.guest-panel.hidden {
  display: none;
}

.guest-panel > .modal-backdrop {
  display: block;
  background: rgba(8, 7, 6, .42);
  -webkit-backdrop-filter: blur(.125rem);
  backdrop-filter: blur(.125rem);
}

/* Legacy mobile CSS added a decorative ::before handle. In a CSS Grid
   card that pseudo-element becomes an extra grid item and shifts the header
   into a zero-height row. Disable it and keep the sheet cue in the border. */
.guest-panel-card::before,
body.client-mode .guest-panel-card::before,
body:not(.client-mode) .guest-panel-card::before {
  display: none !important;
  content: none !important;
}

.guest-panel-card,
body.client-mode .guest-panel-card,
body:not(.client-mode) .guest-panel-card {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  display: grid;
  width: min(calc(100vw - 1.5rem), var(--ui-drawer));
  height: 100%;
  max-height: none;
  overflow: hidden;
  padding: 0;
  grid-template-rows: auto minmax(0, 1fr) auto;
  border: 0;
  border-left: 1px solid rgba(169, 14, 21, .18);
  border-top: .3rem solid var(--role-accent);
  border-radius: 0;
  background: var(--surface-raised);
  box-shadow: -1.5rem 0 4.5rem rgba(8, 7, 6, .24);
  animation: rc6-drawer-in var(--motion-standard) ease-out;
}

.guest-panel-header {
  position: relative;
  z-index: 2;
  padding: var(--ui-5) var(--ui-5) var(--ui-3);
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(180deg, var(--role-soft), rgba(255, 254, 250, .96) 72%);
}

.guest-panel-body {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--ui-4) var(--ui-5) var(--ui-5);
  scrollbar-width: thin;
  scrollbar-gutter: stable;
}

.guest-panel-footer {
  position: relative;
  z-index: 2;
  max-height: min(44vh, 25rem);
  overflow-y: auto;
  margin: 0;
  padding: var(--ui-3) var(--ui-5) calc(var(--ui-4) + env(safe-area-inset-bottom, 0px));
  gap: var(--ui-2);
  border-top: 1px solid var(--border);
  background: rgba(255, 254, 250, .98);
  box-shadow: 0 -.5rem 1.5rem rgba(28, 24, 18, .07);
  scrollbar-width: thin;
}

.guest-panel-header .modal-close {
  top: var(--ui-4);
  right: var(--ui-4);
}

.guest-modal-heading {
  padding-right: 3.25rem;
}

.guest-modal-heading h2 {
  margin: var(--ui-2) 0 0;
  padding: 0;
  font-size: clamp(1.55rem, 2.3vw, 2.15rem);
  line-height: 1.08;
  overflow-wrap: anywhere;
}

.modal-subtitle {
  margin: var(--ui-2) 0 0;
  font-size: clamp(.86rem, 1vw, 1rem);
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.notice,
.issue-summary-panel {
  margin-bottom: var(--ui-3);
}

.issue-summary-panel {
  padding: var(--ui-4);
  border-radius: .875rem;
}

.issue-summary-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--ui-2);
}

.issue-summary-heading span,
.issue-summary-heading small,
.issue-summary-panel > p,
.issue-scope-notice {
  overflow-wrap: anywhere;
}

.issue-summary-panel > p {
  margin: var(--ui-2) 0;
  font-size: 1rem;
  line-height: 1.5;
}

/* Detail content is grouped into compact scan-friendly definition lists. */
.guest-detail-grid {
  display: grid;
  margin: 0 0 var(--ui-4);
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ui-4);
}

.detail-group {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: .875rem;
  background: rgba(247, 243, 235, .58);
}

.detail-group > h3 {
  margin: 0;
  padding: var(--ui-3) var(--ui-4);
  border-bottom: 1px solid var(--border);
  color: var(--ink-700);
  background: rgba(239, 235, 226, .72);
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.detail-list {
  display: grid;
  margin: 0;
}

.detail-item,
.detail-item.wide {
  display: grid;
  min-height: 0;
  padding: var(--ui-3) var(--ui-4);
  grid-template-columns: minmax(6.75rem, .78fr) minmax(0, 1.22fr);
  align-items: baseline;
  gap: var(--ui-3);
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.detail-item:last-child {
  border-bottom: 0;
}

.detail-item dt,
.detail-item span {
  margin: 0;
  color: var(--text-muted);
  font-size: .68rem;
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: .055em;
  text-transform: uppercase;
}

.detail-item dd {
  min-width: 0;
  margin: 0;
}

.detail-item strong {
  display: block;
  font-size: .82rem;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.info-panel,
.notes-panel,
.more-actions,
.action-section {
  padding: var(--ui-3) var(--ui-4);
  border-radius: .75rem;
}

.notes-panel {
  margin-block: var(--ui-3);
}

.more-actions summary {
  min-height: var(--ui-control);
  height: auto;
}

.more-actions summary strong,
.more-actions summary small {
  overflow-wrap: anywhere;
}

.action-grid {
  gap: var(--ui-2);
}

/* -------------------------------------------------------------------------- */
/* Left rail                                                                  */
/* -------------------------------------------------------------------------- */

.rail-card {
  padding: var(--ui-3);
  border-radius: .875rem;
}

.rail-summary {
  overflow: hidden;
  border-top-width: .25rem;
}

.rail-summary .rail-heading {
  display: grid;
  min-height: 2.25rem;
  margin-bottom: var(--ui-3);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: var(--ui-2);
}

.rail-summary .rail-heading .eyebrow,
.rail-summary .rail-heading h2 {
  display: flex;
  min-height: 0;
  margin: 0;
  align-items: center;
  line-height: 1.25;
  white-space: normal;
  overflow-wrap: anywhere;
}

.rail-summary .rail-heading .eyebrow {
  justify-content: flex-start;
  font-size: .64rem;
}

.rail-summary .rail-heading h2 {
  justify-content: flex-end;
  font-size: .95rem;
  text-align: right;
}

.rail-stat-grid {
  gap: var(--ui-2);
}

.rail-stat {
  min-height: 6.2rem;
  height: auto;
  padding: var(--ui-3);
  grid-template-rows: auto auto auto;
  gap: var(--ui-1);
}

.rail-stat strong {
  margin: var(--ui-1) 0;
  font-size: clamp(1.75rem, 2.15vw, 2.2rem);
}

.rail-stat span,
.rail-stat small,
.rail-extra span,
.rail-extra small {
  white-space: normal;
  overflow-wrap: anywhere;
}

.rail-extra {
  gap: var(--ui-2);
}

.activity-list,
.issue-list {
  display: grid;
  gap: 0;
}

.activity-item {
  min-height: 0;
  padding: var(--ui-2) 0;
  grid-template-columns: 2.45rem minmax(0, 1fr);
  gap: var(--ui-2);
}

.activity-copy strong {
  display: -webkit-box;
  overflow: hidden;
  font-size: .72rem;
  line-height: 1.35;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.activity-copy p {
  margin-top: .15rem;
  font-size: .64rem;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

#adminOperatorCard {
  display: none;
}

/* -------------------------------------------------------------------------- */
/* Workspace toolbar and results                                              */
/* -------------------------------------------------------------------------- */

.workspace-toolbar,
body.client-mode .workspace-toolbar {
  position: static;
  display: grid;
  padding: var(--ui-4) var(--ui-4) 0;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ui-2);
}

.search-row {
  display: flex;
  width: 100%;
  align-items: stretch;
  gap: var(--ui-2);
}

.search-box {
  min-width: 0;
  flex: 1 1 auto;
}

.search-box input,
body.desk-mode .search-box input {
  width: 100%;
  min-height: 3.25rem;
  height: auto;
  padding-block: var(--ui-3);
  padding-inline: 2.8rem 5.25rem;
  font-size: clamp(.9rem, 1vw, 1rem);
  line-height: 1.35;
}

.walkin-button {
  min-width: 6.5rem;
  min-height: 3.25rem;
  flex: 0 0 auto;
}

.filter-command-row {
  display: grid;
  width: 100%;
  padding: 0;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
  gap: var(--ui-2);
}

.filter-bar {
  display: grid;
  width: 100%;
  padding: 0 0 var(--ui-2);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--ui-2);
}

.filter-chip {
  width: 100%;
  min-height: var(--ui-control);
  height: auto;
  padding: var(--ui-2) var(--ui-3);
  gap: var(--ui-2);
  border-radius: .7rem;
  font-size: clamp(.72rem, .82vw, .82rem);
  line-height: 1.25;
  text-align: left;
}

.filter-label {
  min-width: 0;
  white-space: normal;
  overflow-wrap: anywhere;
}

.filter-count {
  min-width: 1.7rem;
  min-height: 1.5rem;
  height: auto;
  padding: .2rem .4rem;
  flex: 0 0 auto;
}

.filter-toggle {
  min-width: 8.8rem;
  min-height: var(--ui-control);
  height: auto;
  padding: var(--ui-2) var(--ui-3);
  border-radius: .7rem;
  white-space: normal;
}

.advanced-filters {
  padding: var(--ui-3) 0 var(--ui-4);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 10rem), 1fr));
  gap: var(--ui-3);
}

.compact-field select,
.filter-reset,
.viewer-sort select {
  min-height: var(--ui-control);
  height: auto;
  margin: 0;
}

.viewer-sort {
  display: flex;
  width: 100%;
  padding: 0 0 var(--ui-3);
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: var(--ui-2);
}

.viewer-sort select {
  width: min(100%, 22rem);
}

.list-heading {
  min-width: 0;
  padding: var(--ui-4);
  align-items: flex-end;
  gap: var(--ui-3);
}

.list-heading h2 {
  font-size: clamp(1.05rem, 1.35vw, 1.3rem);
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.count-badge {
  flex: 0 0 auto;
}

.guest-list {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0 var(--ui-4) var(--ui-4);
  gap: var(--ui-2);
  scrollbar-width: thin;
  scrollbar-gutter: stable;
}

.guest-card,
.guest-row__open {
  min-height: 0;
  height: auto;
}

.guest-row__open {
  display: grid;
  width: 100%;
  padding: var(--ui-3) var(--ui-4) var(--ui-3) calc(var(--ui-4) + .25rem);
  grid-template-columns: minmax(0, 1fr) minmax(8.5rem, auto);
  align-items: center;
  gap: var(--ui-3);
  color: var(--ink-950);
  -webkit-text-fill-color: currentColor;
}

.guest-name {
  display: -webkit-box;
  overflow: hidden;
  margin: 0;
  font-size: clamp(.9rem, 1.02vw, 1.02rem);
  line-height: 1.25;
  overflow-wrap: anywhere;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.guest-institution {
  overflow: hidden;
  margin: .15rem 0 var(--ui-1);
  font-size: clamp(.69rem, .76vw, .78rem);
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.guest-meta {
  display: flex;
  overflow: visible;
  flex-wrap: wrap;
  gap: .15rem var(--ui-2);
  white-space: normal;
}

.guest-issue-summary {
  display: grid;
  margin: var(--ui-2) 0;
  padding: var(--ui-2) var(--ui-3);
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--ui-2);
  border-left: .25rem solid var(--warning);
  border-radius: .55rem;
  color: var(--warning-dark);
  background: var(--warning-soft);
  font-size: .75rem;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.guest-issue-summary span {
  font-size: .65rem;
  font-weight: 900;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.guest-row-status,
.badge-row {
  min-width: 0;
}

.badge-row {
  justify-content: flex-end;
  gap: var(--ui-1);
}

.tag {
  min-height: 1.45rem;
  height: auto;
  padding: .24rem .52rem;
  line-height: 1.15;
  white-space: normal;
  text-align: center;
}

.empty-state {
  min-height: 16rem;
  padding: var(--ui-6) var(--ui-5);
}

/* Viewer persistent error state. */
.viewer-error-banner {
  display: grid;
  width: min(100%, 72rem);
  margin: 0 auto var(--ui-4);
  padding: var(--ui-3) var(--ui-4);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--ui-4);
  border: 1px solid rgba(151, 30, 44, .28);
  border-left: .3rem solid var(--danger);
  border-radius: .875rem;
  color: var(--danger);
  background: var(--danger-soft);
  box-shadow: var(--shadow-xs);
}

.viewer-error-banner strong {
  display: block;
  margin-bottom: var(--ui-1);
}

.viewer-error-banner p {
  margin: 0;
  color: var(--ink-700);
  font-size: .82rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.viewer-error-banner .button {
  min-height: var(--ui-control);
  white-space: nowrap;
}

.viewer-tabs {
  width: min(100%, 46rem);
  padding: var(--ui-1);
  gap: var(--ui-1);
}

.viewer-tabs button {
  min-height: var(--ui-control);
  height: auto;
  padding: var(--ui-2) var(--ui-4);
  line-height: 1.3;
  white-space: normal;
}

/* Normal laptop / smaller desktop: keep toolbar usable and avoid compressed
   four-column status controls. */
@media (max-width: 75rem) and (min-width: 52.5625rem) {
  :root {
    --ui-rail: clamp(13.5rem, 20vw, 15rem);
  }

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

  .guest-row__open {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .guest-row-status .badge-row {
    justify-content: flex-start;
  }
}

/* Fixed three-column mode is deliberately reserved for wide desktops. */
@media (min-width: 105rem) {
  .operations-shell {
    grid-template-columns:
      minmax(15rem, 17rem)
      minmax(42rem, 1fr)
      var(--ui-wide-detail);
  }

  body.client-mode .operations-shell:not(.viewer-list-hidden) {
    grid-template-columns: minmax(0, 1fr);
  }

  body:not(.client-mode) .guest-panel-host {
    position: sticky;
    z-index: auto;
    top: var(--workspace-top);
    inset: auto;
    display: block;
    width: auto;
    height: var(--workspace-height);
    overflow: hidden;
    pointer-events: auto;
  }

  body:not(.client-mode) .guest-panel-placeholder {
    display: grid;
  }

  body:not(.client-mode) .guest-panel {
    position: relative;
    inset: auto;
    height: 100%;
  }

  body:not(.client-mode) .guest-panel > .modal-backdrop {
    display: none;
  }

  body:not(.client-mode) .guest-panel-card {
    position: relative;
    inset: auto;
    width: 100%;
    height: 100%;
    border: 1px solid rgba(169, 14, 21, .18);
    border-top: .3rem solid var(--role-accent);
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    animation: none;
  }

  #adminOperatorCard {
    display: block;
  }

  .guest-detail-grid {
    gap: var(--ui-3);
  }
}

/* Tablet and mobile: one page flow, detail becomes a safe bottom sheet. */
@media (max-width: 52.5rem) {
  :root {
    --ui-page-gutter: clamp(.625rem, 2.8vw, 1rem);
  }

  .app-header {
    position: relative;
  }

  .header-row {
    padding-inline: var(--ui-page-gutter);
  }

  .operations-shell,
  body.client-mode .operations-shell,
  body.client-mode .operations-shell:not(.viewer-list-hidden) {
    display: block;
    min-height: 0;
    height: auto;
  }

  .left-rail {
    position: static;
    display: block;
    width: 100%;
    height: auto;
    overflow: visible;
    margin-bottom: var(--ui-3);
  }

  .left-rail > .rail-card:not(.rail-summary) {
    display: none;
  }

  .rail-summary .rail-heading {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workspace-card,
  body.client-mode .workspace-card {
    height: auto;
    min-height: 0;
    overflow: visible;
  }

  .workspace-toolbar,
  body.client-mode .workspace-toolbar {
    padding: var(--ui-3) var(--ui-3) 0;
  }

  .search-row {
    flex-direction: column;
  }

  .search-row > .button,
  .search-box {
    width: 100%;
  }

  .search-box input,
  body.desk-mode .search-box input {
    min-height: 3rem;
    padding-right: 3.25rem;
  }

  .search-box kbd {
    display: none;
  }

  .clear-search {
    right: .25rem;
    width: var(--ui-control);
    height: var(--ui-control);
  }

  .filter-command-row {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .filter-toggle {
    width: 100%;
  }

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

  .filter-reset {
    grid-column: 1 / -1;
  }

  .viewer-sort {
    align-items: stretch;
    flex-direction: column;
  }

  .viewer-sort select {
    width: 100%;
  }

  .list-heading {
    padding: var(--ui-4) var(--ui-3) var(--ui-3);
    align-items: flex-start;
  }

  .guest-list {
    overflow: visible;
    padding: 0 var(--ui-3) var(--ui-4);
  }

  .guest-row__open {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .guest-institution {
    white-space: normal;
  }

  .guest-row-status .badge-row {
    justify-content: flex-start;
  }

  .guest-panel-card,
  body.client-mode .guest-panel-card,
  body:not(.client-mode) .guest-panel-card {
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: min(92vh, 56rem);
    height: min(92dvh, 56rem);
    max-height: none;
    border: 0;
    border-top: .35rem solid var(--role-accent);
    border-radius: 1.5rem 1.5rem 0 0;
    display: flex;
    flex-direction: column;
    box-shadow: 0 -1.75rem 5rem rgba(20, 16, 12, .34);
    animation: rc6-sheet-in var(--motion-standard) ease-out;
  }

  .guest-panel-header {
    flex: 0 0 auto;
    max-height: 48vh;
    max-height: 48dvh;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: var(--ui-5) var(--ui-4) var(--ui-3);
    scrollbar-width: thin;
  }

  .guest-panel-body {
    flex: 1 1 0;
    min-height: 5.5rem;
    padding: var(--ui-4);
  }

  .guest-panel-footer {
    flex: 0 0 auto;
    max-height: 28vh;
    max-height: 28dvh;
    padding-inline: var(--ui-4);
  }

  .issue-summary-heading {
    grid-template-columns: minmax(0, 1fr);
  }

  .detail-item,
  .detail-item.wide {
    grid-template-columns: minmax(6.25rem, .78fr) minmax(0, 1.22fr);
  }

  .viewer-error-banner {
    grid-template-columns: minmax(0, 1fr);
    align-items: stretch;
  }

  .viewer-error-banner .button {
    width: 100%;
  }

  .viewer-tabs {
    position: sticky;
    top: env(safe-area-inset-top, 0px);
  }
}

@media (max-width: 30rem) {
  .operator-text {
    display: none;
  }

  .operator-button {
    width: var(--ui-control);
    min-width: var(--ui-control);
    padding: 0;
  }

  .rail-summary .rail-heading {
    grid-template-columns: minmax(0, 1fr);
    text-align: center;
  }

  .rail-summary .rail-heading .eyebrow,
  .rail-summary .rail-heading h2 {
    justify-content: center;
    text-align: center;
  }

  .advanced-filters {
    grid-template-columns: minmax(0, 1fr);
  }

  .detail-item,
  .detail-item.wide {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--ui-1);
  }

  .guest-panel-footer .action-grid,
  .action-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Small landscape phones prioritize vertical space and avoid nested headers. */
@media (max-width: 58rem) and (max-height: 31rem) and (orientation: landscape) {
  .header-row {
    min-height: 3.5rem;
    padding-block: var(--ui-2);
  }

  .app-main {
    padding-top: var(--ui-2);
  }

  .viewer-tabs {
    position: static;
  }

  .guest-panel-card,
  body.client-mode .guest-panel-card,
  body:not(.client-mode) .guest-panel-card {
    height: 96vh;
    height: 96dvh;
    border-radius: 1rem 1rem 0 0;
  }

  .guest-panel-footer {
    max-height: 50vh;
  }
}

@media (pointer: coarse) {
  .filter-chip,
  .filter-toggle,
  .button,
  .menu-item,
  .viewer-tabs button,
  .guest-row__open,
  .modal-close,
  summary {
    min-height: var(--ui-control);
  }

  .guest-card:hover,
  .rail-stat:hover,
  .attention-row:hover {
    transform: none;
  }
}

@media (prefers-contrast: more) {
  .filter-chip,
  .detail-group,
  .guest-card,
  .viewer-error-banner,
  .issue-summary-panel {
    border-width: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .guest-panel-card {
    animation: none;
  }
}

@keyframes rc6-drawer-in {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

@keyframes rc6-sheet-in {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

/* RC8: authoritative guest-list row sizing after bulk reset. */
.guest-list:not(.hidden) {
  display: grid;
  grid-auto-rows: max-content;
  align-content: start;
}

.guest-list > .guest-card {
  display: block;
  position: relative;
  width: 100%;
  min-width: 0;
  min-height: 4.25rem;
  height: auto;
  overflow: hidden;
  flex: 0 0 auto;
}

.guest-list > .guest-card > .guest-row__open {
  display: grid;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  min-height: 4.25rem;
  height: auto;
  padding: .75rem 1rem .75rem 1.25rem;
  grid-template-columns: minmax(0, 1fr) minmax(8.5rem, auto);
  align-items: center;
  gap: .75rem;
  border: 0;
  color: var(--ink-950);
  background: transparent;
  text-align: left;
  appearance: none;
  -webkit-appearance: none;
  -webkit-text-fill-color: currentColor;
}

.guest-list .guest-card-main,
.guest-list .guest-row-status,
.guest-list .guest-name,
.guest-list .guest-institution,
.guest-list .guest-meta,
.guest-list .guest-issue-summary,
.guest-list .badge-row {
  min-width: 0;
  visibility: visible;
  opacity: 1;
}

.guest-list .guest-name,
.guest-list .guest-institution {
  min-height: 1.25em;
}

@media (max-width: 75rem) {
  .guest-list > .guest-card > .guest-row__open {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .guest-list .guest-row-status .badge-row {
    justify-content: flex-start;
  }
}

/* ========================================================================== */
/* RC10 — summary rail geometry hardening                                    */
/* Equal card geometry, baseline rhythm and predictable text wrapping.       */
/* ========================================================================== */

.rail-summary {
  padding: 0.75rem;
}

.rail-summary .rail-heading {
  min-height: 2.5rem;
  margin-bottom: 0.75rem;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  column-gap: 0.75rem;
}

.rail-summary .rail-heading .eyebrow,
.rail-summary .rail-heading h2 {
  min-width: 0;
  min-height: 2.5rem;
  align-items: center;
}

.rail-summary .rail-heading h2 {
  justify-content: flex-end;
  text-wrap: balance;
}

.rail-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: 7rem;
  gap: 0.5rem;
}

.rail-stat {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: 0;
  height: 100%;
  padding: 0.75rem;
  grid-template-rows: 2.4em minmax(2rem, auto) 2.6em;
  align-content: stretch;
  align-items: start;
  gap: 0.25rem;
  border-radius: 0.75rem;
}

.rail-stat span {
  display: flex;
  min-width: 0;
  min-height: 2.4em;
  align-items: flex-start;
  font-size: 0.625rem;
  line-height: 1.2;
  letter-spacing: 0.07em;
  text-wrap: balance;
}

.rail-stat strong {
  display: flex;
  min-width: 0;
  min-height: 2rem;
  margin: 0;
  align-items: center;
  font-size: clamp(1.75rem, 2vw, 2.05rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.rail-stat small {
  display: flex;
  min-width: 0;
  min-height: 2.6em;
  align-items: flex-start;
  font-size: 0.5625rem;
  line-height: 1.3;
  text-wrap: balance;
}

.rail-extra {
  display: grid;
  margin-top: 0.5rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-rows: 4.5rem;
  gap: 0.5rem;
}

.rail-extra button {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: 0;
  height: 100%;
  padding: 0.625rem;
  grid-template-rows: 1.2em minmax(1.1rem, auto) 1.2em;
  align-content: stretch;
  align-items: start;
  gap: 0.1875rem;
  border-radius: 0.625rem;
}

.rail-extra span {
  min-width: 0;
  min-height: 1.2em;
  font-size: 0.5rem;
  line-height: 1.2;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.rail-extra strong {
  display: flex;
  min-width: 0;
  min-height: 1.1rem;
  margin: 0;
  align-items: center;
  font-size: 1rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.rail-extra small {
  min-width: 0;
  min-height: 1.2em;
  margin: 0;
  font-size: 0.5rem;
  line-height: 1.2;
  white-space: nowrap;
}

@media (min-width: 52.5625rem) and (max-width: 75rem) {
  .rail-stat-grid {
    grid-auto-rows: 6.75rem;
  }

  .rail-stat {
    padding: 0.6875rem;
  }

  .rail-stat strong {
    font-size: 1.75rem;
  }

  .rail-extra {
    grid-auto-rows: 4.25rem;
  }
}

@media (max-width: 52.5rem) {
  .rail-summary {
    padding: 0.875rem;
  }

  .rail-summary .rail-heading {
    display: none;
  }

  .rail-stat-grid {
    grid-auto-rows: minmax(6.75rem, auto);
  }

  .rail-stat {
    min-height: 6.75rem;
  }
}

@media (forced-colors: active) {
  .rail-stat,
  .rail-extra button {
    border: 1px solid CanvasText;
  }
}


/* ========================================================================== */
/* v3.0.7 — consolidated operational UX                                      */
/* ========================================================================== */

/* Compact, fully visible summary rail. No clipping or mismatched geometry. */
.rail-summary {
  overflow: visible;
  padding: 0.75rem;
}
.rail-summary .rail-heading {
  min-height: 2.25rem;
  margin-bottom: 0.625rem;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
}
.rail-summary .rail-heading .eyebrow,
.rail-summary .rail-heading h2 {
  min-height: 2.25rem;
  line-height: 1.15;
}
.rail-stat-grid {
  grid-auto-rows: minmax(6rem, auto);
  gap: 0.5rem;
}
.rail-stat {
  min-height: 6rem;
  padding: 0.6875rem;
  grid-template-rows: minmax(1.5rem, auto) minmax(1.9rem, auto) minmax(1.5rem, auto);
  gap: 0.1875rem;
}
.rail-stat span {
  min-height: 1.5rem;
  font-size: 0.6rem;
}
.rail-stat strong {
  min-height: 1.9rem;
  font-size: clamp(1.7rem, 2vw, 2rem);
}
.rail-stat small {
  min-height: 1.5rem;
  font-size: 0.54rem;
  line-height: 1.25;
}
.rail-extra {
  margin-top: 0.5rem;
  grid-auto-rows: minmax(3.75rem, auto);
  gap: 0.5rem;
}
.rail-extra button {
  min-height: 3.75rem;
  padding: 0.5rem;
  grid-template-rows: 1rem 1.15rem 1rem;
  gap: 0.125rem;
}
.rail-extra span,
.rail-extra small { font-size: 0.47rem; }
.rail-extra strong { font-size: 0.95rem; }

/* Five equal primary filters, with graceful wrapping on smaller screens. */
.filter-bar { grid-template-columns: repeat(5, minmax(0, 1fr)); }
@media (max-width: 90rem) and (min-width: 75.0625rem) {
  .filter-command-row { grid-template-columns: minmax(0, 1fr); }
  .filter-toggle { width: 100%; }
}
@media (max-width: 75rem) {
  .filter-bar { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 40rem) {
  .filter-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-chip:last-child { grid-column: 1 / -1; }
}

/* Semantic operational status. */
.detail-item[data-tone] {
  position: relative;
  overflow: hidden;
}
.detail-item[data-tone]::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0.25rem;
  content: "";
}
.detail-item[data-tone="success"] { background: rgba(33, 122, 82, 0.08); }
.detail-item[data-tone="success"]::before { background: var(--success); }
.detail-item[data-tone="success"] dd strong { color: var(--success-strong, #176342); }
.detail-item[data-tone="warning"] { background: rgba(174, 118, 20, 0.1); }
.detail-item[data-tone="warning"]::before { background: var(--warning); }
.detail-item[data-tone="warning"] dd strong { color: #9a620c; }
.detail-item[data-tone="danger"] { background: rgba(220, 24, 32, 0.08); }
.detail-item[data-tone="danger"]::before { background: var(--danger, var(--brand)); }
.detail-item[data-tone="danger"] dd strong { color: var(--brand-deep); }
.detail-item[data-tone="pending"] { background: rgba(220, 24, 32, 0.055); }
.detail-item[data-tone="pending"]::before { background: #e06b2e; }
.detail-item[data-tone="pending"] dd strong { color: #b54c1d; }

/* Clickable activity rows. */
.activity-item.is-clickable {
  width: 100%;
  padding-inline: 0.25rem;
  grid-template-columns: 2.45rem minmax(0, 1fr) auto;
  border: 0;
  border-radius: 0.5rem;
  color: inherit;
  background: transparent;
  text-align: left;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}
.activity-item.is-clickable:hover { background: rgba(220, 24, 32, 0.055); }
.activity-item.is-clickable:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.activity-open { align-self: center; color: var(--brand); font-size: 1.25rem; font-weight: 900; }

/* Stable 25/50 row pagination. */
.pagination-bar {
  display: grid;
  min-height: 3.75rem;
  padding: 0.625rem 0.75rem;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-raised) 94%, transparent);
}
.page-size-control,
.pagination-summary,
.pagination-actions { display: flex; align-items: center; gap: 0.5rem; }
.page-size-control { font-size: 0.75rem; color: var(--text-muted); }
.page-size-control select { min-height: 2.25rem; padding: 0.35rem 1.75rem 0.35rem 0.6rem; }
.pagination-summary { min-width: 0; justify-content: center; flex-wrap: wrap; font-size: 0.75rem; }
.pagination-summary span { color: var(--text-muted); }
.pagination-actions { justify-content: flex-end; }
.pagination-actions button {
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  color: var(--ink-950);
  background: var(--surface-raised);
  font: inherit;
  font-weight: 800;
}
.pagination-actions button:disabled { opacity: 0.42; cursor: not-allowed; }
@media (max-width: 48rem) {
  .pagination-bar { grid-template-columns: 1fr; justify-items: stretch; }
  .page-size-control, .pagination-summary, .pagination-actions { justify-content: center; }
  .pagination-actions button { flex: 1 1 0; }
}