:root {
  color-scheme: dark;
  --bg: #071019;
  --surface: #101c28;
  --surface-raised: #172737;
  --border: #375066;
  --text: #f2f7fb;
  --muted: #b6c8d6;
  --accent: #55d7b5;
  --accent-strong: #7ce9cc;
  --accent-ink: #04231c;
  --warning: #ffd479;
  --danger: #ff9f9f;
  --focus: #ffd479;
  --radius: 0.75rem;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 100%;
  line-height: 1.55;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 20rem;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 10% -10%, rgb(36 103 104 / 35%), transparent 32rem),
    linear-gradient(180deg, #09141f 0%, var(--bg) 50%);
}

button,
select {
  font: inherit;
}

button,
select,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 0.2rem solid var(--focus);
  outline-offset: 0.2rem;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: #071019;
  background: var(--focus);
  border-radius: 0.4rem;
  font-weight: 800;
  transform: translateY(-200%);
}

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

.site-header,
main,
footer {
  width: min(80rem, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: var(--space-6) var(--space-5);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 18ch;
  margin-bottom: var(--space-2);
  font-size: clamp(2rem, 6vw, 4.25rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h2 {
  margin-bottom: var(--space-1);
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.2;
}

h3 {
  margin-bottom: var(--space-1);
  font-size: 1.1rem;
}

.eyebrow {
  margin-bottom: var(--space-1);
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lede {
  max-width: 65ch;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.connection-state {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgb(16 28 40 / 88%);
  color: var(--muted);
  font-weight: 700;
  white-space: nowrap;
}

.status-dot {
  width: 0.7rem;
  height: 0.7rem;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: currentColor;
}

body[data-stream-state="connected"] .connection-state {
  color: var(--accent-strong);
}

body[data-stream-state="reconnecting"] .connection-state,
body[data-stream-state="polling"] .connection-state,
body[data-stream-state="reset"] .connection-state {
  color: var(--warning);
}

body[data-stream-state="error"] .connection-state {
  color: var(--danger);
}

main {
  display: grid;
  gap: var(--space-4);
}

.filter-panel,
.summary-panel,
.results-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgb(16 28 40 / 94%);
  box-shadow: 0 1rem 3rem rgb(0 0 0 / 18%);
}

.filter-panel,
.results-panel {
  padding: clamp(1rem, 4vw, 2rem);
}

.section-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.boundary-note,
#results-summary {
  max-width: 34rem;
  margin-bottom: 0;
  color: var(--muted);
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 750;
}

select {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.6rem 2.4rem 0.6rem 0.75rem;
  border: 1px solid #587189;
  border-radius: 0.45rem;
  color: var(--text);
  background: #0b1722;
}

select:disabled {
  color: #9fb0bd;
  border-style: dashed;
  opacity: 1;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.button {
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  border: 1px solid #6a8298;
  border-radius: 0.45rem;
  color: var(--text);
  background: var(--surface-raised);
  cursor: pointer;
  font-weight: 800;
}

.button:hover {
  border-color: var(--accent-strong);
  background: #21384a;
}

.button:active {
  transform: translateY(1px);
}

.button.primary {
  color: var(--accent-ink);
  border-color: var(--accent);
  background: var(--accent);
}

.button.primary:hover {
  background: var(--accent-strong);
}

.form-error {
  margin: var(--space-3) 0 0;
  color: var(--danger);
  font-weight: 750;
}

.summary-panel {
  padding: 0;
  overflow: hidden;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
}

.summary-grid > div {
  min-width: 0;
  padding: var(--space-3) var(--space-4);
  border-right: 1px solid var(--border);
}

.summary-grid > div:last-child {
  border-right: 0;
}

.summary-grid dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.summary-grid dd {
  margin: 0.25rem 0 0;
  overflow-wrap: anywhere;
  font-size: 1.05rem;
  font-weight: 800;
}

.results-heading {
  align-items: end;
}

.session-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
  gap: var(--space-3);
}

.session-card {
  min-width: 0;
  padding: var(--space-3);
  border: 1px solid #496177;
  border-radius: 0.6rem;
  background: #0b1722;
}

.card-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-2);
}

.card-heading h3 {
  overflow-wrap: anywhere;
}

.region-badge {
  flex: 0 0 auto;
  padding: 0.15rem 0.5rem;
  border: 1px solid #597187;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 750;
}

.session-detail {
  display: grid;
  grid-template-columns: minmax(5rem, auto) 1fr;
  gap: 0.25rem var(--space-2);
  margin: var(--space-3) 0 0;
  font-size: 0.9rem;
}

.session-detail dt {
  color: var(--muted);
}

.session-detail dd {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
}

.capacity-row {
  margin-top: var(--space-3);
}

.capacity-copy {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.85rem;
}

meter {
  width: 100%;
  height: 0.65rem;
  accent-color: var(--accent);
}

.metadata-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}

.metadata-list li {
  max-width: 100%;
  padding: 0.2rem 0.45rem;
  overflow-wrap: anywhere;
  border-radius: 0.3rem;
  color: #d6e4ed;
  background: #1b2b39;
  font-size: 0.78rem;
}

.updated-age {
  margin: var(--space-3) 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.empty-state {
  padding: var(--space-6) var(--space-3);
  text-align: center;
  border: 1px dashed #587189;
  border-radius: 0.6rem;
  color: var(--muted);
}

.empty-state h3 {
  color: var(--text);
}

footer {
  padding-block: var(--space-5);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

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

[hidden] {
  display: none !important;
}

@media (max-width: 56rem) {
  .site-header,
  .section-heading {
    align-items: start;
    flex-direction: column;
  }

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

  .summary-grid > div:nth-child(2) {
    border-right: 0;
  }

  .summary-grid > div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 36rem) {
  .site-header,
  main,
  footer {
    width: min(100% - 1rem, 80rem);
  }

  .site-header {
    padding-block: var(--space-5) var(--space-4);
  }

  .filter-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .summary-grid > div {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .summary-grid > div:last-child {
    border-bottom: 0;
  }

  .button {
    width: 100%;
  }
}

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