:root {
  color-scheme: light;
  --ink: #171914;
  --ink-soft: #343831;
  --muted: #62665e;
  --paper: #faf7ef;
  --sand: #eee8da;
  --sand-deep: #d9d1c1;
  --line: #b9b09f;
  --signal: #e45522;
  --focus: #006b70;
  --ok: #185e42;
  --ok-bg: #d9e9df;
  --warn: #704900;
  --warn-bg: #f1e0ae;
  --danger: #8b2e2e;
  --danger-bg: #f0d7d0;
  --disabled: #5a5e57;
  --disabled-bg: #dddad0;
  --radius: 2px;
  --shadow: 4px 4px 0 rgb(23 25 20 / 10%);
  --display: "Arial Narrow", "Aptos Narrow", "Roboto Condensed", "Helvetica Neue", Arial, sans-serif;
  --body: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
}

body {
  min-height: 100vh;
  margin: 0;
  background-color: var(--paper);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M0 0H24M0 0V24' fill='none' stroke='%23b9b09f' stroke-opacity='.13' stroke-width='.5'/%3E%3C/svg%3E");
  font-size: 0.9375rem;
  line-height: 1.45;
}

button,
input,
textarea {
  color: inherit;
  font: inherit;
}

button,
.button-link {
  min-height: 2.75rem;
  border: 1px solid var(--ink-soft);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-family: var(--display);
  font-size: 0.82rem;
  font-stretch: condensed;
  font-weight: 800;
  letter-spacing: 0.09em;
  line-height: 1;
  text-transform: uppercase;
  transition: background-color 160ms linear, border-color 160ms linear, color 160ms linear, transform 160ms linear;
}

button:hover,
.button-link:hover {
  background: var(--sand);
}

.button-link {
  display: inline-grid;
  place-items: center;
  padding: 0.75rem 0.9rem;
  text-align: center;
  text-decoration: none;
}

button:active,
.button-link:active {
  transform: translate(1px, 1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

a {
  color: var(--focus);
  text-underline-offset: 0.2em;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.site-header {
  display: grid;
  grid-template-columns: minmax(15rem, 1fr) auto auto;
  min-height: 5.4rem;
  align-items: center;
  gap: clamp(1.2rem, 4vw, 4rem);
  padding: 1rem clamp(1.25rem, 3vw, 2.5rem);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  background: rgb(250 247 239 / 94%);
}

.site-title {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.55rem, 3vw, 2.65rem);
  font-stretch: condensed;
  font-weight: 900;
  letter-spacing: 0.065em;
  line-height: 0.98;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: stretch;
  gap: clamp(1rem, 3vw, 3rem);
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.site-nav a {
  position: relative;
  display: grid;
  min-height: 2.75rem;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--ok);
}

.site-nav a[aria-current="page"]::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--ok);
  content: "";
}

.session-box {
  display: flex;
  min-height: 2.75rem;
  align-items: center;
  gap: 1rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}

.session-state {
  color: var(--muted);
  font-family: var(--display);
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.session-state[data-state="authorized"] {
  color: var(--ok);
}

.session-box button {
  padding-inline: 1.25rem;
  border-color: var(--danger);
  color: var(--danger);
}

.discard-mark {
  display: none;
}

.signal-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  min-height: 4.7rem;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid rgb(185 176 159 / 45%);
}

.signal-flow::before {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--signal);
  content: "";
  transform: translateY(-50%);
}

.signal-step {
  position: relative;
  z-index: 1;
  justify-self: center;
  padding: 0.35rem 0.75rem;
  background: var(--paper);
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-step b {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  margin-right: 0.65rem;
  border: 1px solid var(--signal);
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
}

.page-main {
  width: min(100%, 100rem);
  margin: 0 auto;
  padding: clamp(1rem, 2vw, 2rem);
}

.panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgb(250 247 239 / 95%);
  box-shadow: var(--shadow);
}

.corner-ticks::before,
.corner-ticks::after {
  position: absolute;
  width: 0.8rem;
  height: 0.8rem;
  content: "";
  pointer-events: none;
}

.corner-ticks::before {
  top: 0.8rem;
  right: 0.8rem;
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.corner-ticks::after {
  bottom: 0.8rem;
  left: 0.8rem;
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.section-heading,
.panel-heading {
  margin: 0;
  font-family: var(--display);
  font-stretch: condensed;
  font-weight: 900;
  letter-spacing: 0.075em;
  line-height: 1;
  text-transform: uppercase;
}

.section-heading {
  font-size: clamp(1.15rem, 2vw, 1.5rem);
}

.panel-heading {
  font-size: 1.15rem;
}

.heading-rule {
  width: 8.5rem;
  margin: 1rem 0 1.75rem;
  border: 0;
  border-top: 1px dashed var(--line);
}

.eyebrow,
.field-label,
.meta-label {
  font-family: var(--display);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.field-label {
  display: block;
  margin-bottom: 0.45rem;
}

.field-hint,
.helper-text {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.75rem;
}

input,
textarea {
  width: 100%;
  min-height: 3rem;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--ink-soft);
  border-radius: var(--radius);
  background: rgb(255 255 255 / 74%);
  font-family: var(--mono);
  line-height: 1.4;
}

textarea {
  min-height: 9rem;
  resize: vertical;
}

.field-stack {
  display: grid;
  gap: 1.45rem;
}

.primary-button {
  width: 100%;
  min-height: 3.4rem;
  padding: 0.9rem 1.25rem;
  border: 2px solid var(--focus);
  background: var(--focus);
  box-shadow: 3px 3px 0 rgb(0 107 112 / 18%);
  color: var(--paper);
  font-size: 0.92rem;
}

.primary-button:hover {
  background: #00595e;
}

.danger-button {
  border-color: var(--danger);
  color: var(--danger);
}

.auth-wrap {
  display: grid;
  min-height: min(42rem, calc(100vh - 11rem));
  place-items: start center;
  padding-top: clamp(3rem, 9vh, 7rem);
}

.auth-panel {
  width: min(100%, 34rem);
  padding: clamp(2rem, 4vw, 3.1rem);
}

.auth-copy {
  max-width: 38ch;
  margin: 0 0 1.8rem;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.auth-memory-note {
  margin: 1.45rem 0;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 0.76rem;
}

.text-link {
  font-family: var(--display);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.admin-grid {
  display: grid;
  grid-template-columns: minmax(17rem, 22rem) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.register-panel,
.registry-panel,
.tester-panel,
.events-panel {
  padding: clamp(1.25rem, 2vw, 1.75rem);
}

.register-panel {
  position: sticky;
  top: 1rem;
  min-height: 39rem;
}

.privacy-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.8rem;
  margin: 1.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--line);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.73rem;
}

.privacy-mark {
  display: grid;
  width: 1.7rem;
  height: 1.7rem;
  place-items: center;
  border: 1px solid var(--ink-soft);
  font-family: var(--display);
  font-weight: 900;
}

.registry-header,
.events-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.entry-count {
  font-family: var(--display);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.feed-list,
.event-list {
  display: grid;
  gap: 1rem;
}

.empty-state {
  padding: 3rem 1.25rem;
  border: 1px dashed var(--line);
  color: var(--muted);
  font-family: var(--mono);
  text-align: center;
}

.feed-record {
  border: 1px solid var(--line);
  background: rgb(255 255 255 / 42%);
  animation: panel-in 240ms linear both;
}

.feed-summary {
  display: grid;
  grid-template-columns: 3.2rem minmax(12rem, 1fr) minmax(13rem, 0.75fr) auto;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.sequence-cell {
  display: grid;
  min-height: 7.6rem;
  place-items: center;
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 1rem;
}

.feed-identity,
.relay-identity,
.feed-actions {
  min-width: 0;
  padding: 1.15rem 1.25rem;
}

.feed-identity {
  border-right: 1px solid var(--line);
}

.feed-name {
  margin: 0 0 0.55rem;
  overflow-wrap: anywhere;
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: 0.025em;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.2rem 0.45rem;
  background: var(--disabled-bg);
  color: var(--disabled);
  font-family: var(--display);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-badge[data-tone="ok"] {
  background: var(--ok-bg);
  color: var(--ok);
}

.status-badge[data-tone="warn"] {
  background: var(--warn-bg);
  color: var(--warn);
}

.status-badge[data-tone="danger"] {
  background: var(--danger-bg);
  color: var(--danger);
}

.relay-mask {
  display: block;
  margin-top: 0.55rem;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.feed-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(8rem, 1fr));
  gap: 0.7rem;
}

.feed-actions button {
  padding: 0.75rem 0.9rem;
  border-color: var(--focus);
  color: var(--focus);
}

.health-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.health-cell {
  min-width: 0;
  min-height: 5.4rem;
  padding: 0.85rem 1.05rem;
  border-right: 1px solid var(--line);
}

.health-cell:nth-child(4n),
.health-cell:last-child {
  border-right: 0;
}

.health-cell:nth-child(n + 5) {
  border-top: 1px solid var(--line);
}

.health-cell:last-child {
  grid-column: span 2;
}

.health-value {
  display: block;
  margin-top: 0.45rem;
  overflow-wrap: anywhere;
  font-family: var(--mono);
  font-size: 0.75rem;
}

.health-cell--time .health-value {
  overflow-wrap: normal;
  word-break: keep-all;
}

.maintenance-toggle {
  display: flex;
  width: 100%;
  min-height: 3.3rem;
  align-items: center;
  gap: 0.8rem;
  padding: 0.8rem 1.1rem;
  border: 0;
  background: transparent;
  text-align: left;
}

.maintenance-toggle::before {
  width: 0.65rem;
  height: 0.65rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
  transform: rotate(45deg) translateY(-0.15rem);
  transition: transform 160ms linear;
}

.maintenance-toggle[aria-expanded="true"]::before {
  transform: rotate(225deg) translate(-0.15rem, -0.05rem);
}

.maintenance-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(14rem, 1fr));
  gap: 1rem;
  padding: 1rem;
  border-top: 1px solid var(--line);
  background: var(--sand);
  animation: panel-in 240ms linear both;
}

.maintenance-form,
.maintenance-actions,
.confirmation-box {
  display: grid;
  gap: 0.65rem;
  align-content: start;
  padding: 1rem;
  border: 1px solid var(--line);
  background: var(--paper);
}

.maintenance-actions {
  grid-template-columns: repeat(2, 1fr);
}

.maintenance-actions .wide-action,
.confirmation-box {
  grid-column: 1 / -1;
}

.confirmation-box {
  border-color: var(--danger);
  color: var(--danger);
}

.confirmation-box p {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.75rem;
}

.confirmation-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

.live-region {
  position: fixed;
  z-index: 10;
  right: 1rem;
  bottom: 1rem;
  max-width: min(26rem, calc(100vw - 2rem));
  padding: 0.9rem 1rem;
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow);
  font-family: var(--mono);
  font-size: 0.75rem;
}

[aria-busy="true"] {
  position: relative;
}

[aria-busy="true"]::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 4px;
  background: var(--signal);
  content: "";
  animation: loading-rail 640ms linear infinite alternate;
  transform-origin: left;
}

.tester-layout {
  display: grid;
  gap: 1rem;
}

.url-console {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(12rem, 25rem);
  gap: 1rem;
  align-items: end;
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 1rem;
  border: 1px solid var(--line);
}

.diagnostic {
  min-height: 5.4rem;
  padding: 0.95rem;
  border-right: 1px solid var(--line);
  text-align: center;
}

.diagnostic:last-child {
  border-right: 0;
}

.diagnostic-value {
  display: block;
  margin-top: 0.45rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 700;
}

.diagnostic-value[data-tone="ok"] {
  color: var(--ok);
}

.diagnostic-value[data-tone="danger"] {
  color: var(--danger);
}

.event-record {
  display: grid;
  grid-template-columns: 3rem minmax(12rem, 1fr) minmax(12rem, 0.9fr) minmax(15rem, 1.25fr);
  border: 1px solid var(--line);
  background: rgb(255 255 255 / 42%);
  animation: panel-in 240ms linear both;
}

.event-sequence {
  display: grid;
  min-height: 8rem;
  place-items: center;
  border-right: 1px solid var(--line);
  font-family: var(--mono);
}

.event-block {
  min-width: 0;
  padding: 1rem 1.25rem;
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.75rem;
  overflow-wrap: anywhere;
}

.event-block:last-child {
  border-right: 0;
}

.event-title {
  margin: 0 0 0.75rem;
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 900;
}

.event-field {
  margin: 0.45rem 0;
}

.raw-panel {
  border: 1px solid var(--line);
}

.raw-toggle {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border: 0;
  text-align: left;
}

.raw-output {
  max-height: 28rem;
  margin: 0;
  overflow: auto;
  padding: 1rem;
  border-top: 1px solid var(--line);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.72rem;
  white-space: pre-wrap;
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(0.4rem); }
  to { opacity: 1; transform: none; }
}

@keyframes loading-rail {
  from { transform: scaleX(0.12); }
  to { transform: scaleX(1); }
}

@media (max-width: 70rem) {
  .feed-summary {
    grid-template-columns: 3rem minmax(12rem, 1fr) minmax(12rem, 0.8fr);
  }

  .feed-actions {
    grid-column: 2 / -1;
    border-top: 1px solid var(--line);
  }

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

  .health-cell:nth-child(n) {
    border-top: 0;
    border-right: 1px solid var(--line);
  }

  .health-cell:nth-child(2n),
  .health-cell:last-child {
    border-right: 0;
  }

  .health-cell:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .health-cell:last-child {
    grid-column: span 2;
  }

  .event-record {
    grid-template-columns: 3rem repeat(3, 1fr);
  }
}

@media (max-width: 47.5rem) {
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 0.75rem;
  }

  .site-title {
    grid-column: 1 / -1;
  }

  .session-box {
    padding-left: 0.75rem;
  }

  .admin-grid,
  .url-console {
    grid-template-columns: 1fr;
  }

  .register-panel {
    position: static;
    min-height: 0;
  }

  .feed-summary,
  .event-record {
    grid-template-columns: 2.7rem minmax(0, 1fr);
  }

  .sequence-cell,
  .event-sequence {
    grid-row: 1 / span 3;
    min-height: 100%;
  }

  .feed-identity,
  .relay-identity,
  .feed-actions,
  .event-block {
    grid-column: 2;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .diagnostic-grid,
  .maintenance-panel {
    grid-template-columns: repeat(2, 1fr);
  }

  .diagnostic:nth-child(n) {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .diagnostic:nth-child(2n) {
    border-right: 0;
  }

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

  .event-block:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 34rem) {
  .site-header {
    padding-inline: 1rem;
  }

  .site-nav {
    gap: 1rem;
  }

  .session-box {
    border-left: 0;
  }

  .session-box button {
    display: grid;
    width: 2.75rem;
    place-items: center;
    overflow: hidden;
    padding: 0;
  }

  .discard-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    margin: -1px;
    padding: 0;
    border: 0;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .discard-mark {
    position: relative;
    display: block;
    width: 1rem;
    height: 1rem;
    color: var(--danger);
  }

  .discard-mark::before,
  .discard-mark::after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1rem;
    height: 2px;
    background: currentcolor;
    content: "";
  }

  .discard-mark::before {
    transform: translate(-50%, -50%) rotate(45deg);
  }

  .discard-mark::after {
    transform: translate(-50%, -50%) rotate(-45deg);
  }

  .signal-step {
    padding-inline: 0.3rem;
    font-size: 0.65rem;
  }

  .signal-step b {
    display: grid;
    margin: 0 auto 0.25rem;
  }

  .feed-actions,
  .diagnostic-grid,
  .maintenance-actions,
  .confirmation-actions {
    grid-template-columns: 1fr;
  }

  .diagnostic:nth-child(n) {
    border-right: 0;
  }

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

  .health-cell:nth-child(n) {
    grid-column: auto;
    border-top: 0;
    border-right: 0;
  }

  .health-cell:nth-child(n + 2) {
    border-top: 1px solid var(--line);
  }
}

@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;
  }
}