/* Atlantic Observatory — public static artifact.
   No @import, no remote font, no remote image: every byte is local so a strict
   Content-Security-Policy with no external origins renders this unchanged. */

:root {
  --ink: #14181d;
  --ink-soft: #4c5763;
  --ink-faint: #6b7684;
  --paper: #fbfaf7;
  --card: #ffffff;
  --rule: #d9d6cd;
  --rule-soft: #ebe8e0;
  --early: #1c4f8f;
  --recent: #b3471b;
  --candidate: #8c93a0;
  --accent: #1c4f8f;
  --focus: #0b63d6;
  --warn-bg: #fdf3e3;
  --warn-rule: #e0b871;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: Iowan Old Style, "Palatino Linotype", Palatino, Georgia, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  max-width: 100%;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

img,
canvas,
table {
  max-width: 100%;
}

p,
li,
td,
th,
h1,
h2,
h3,
dd,
dt {
  overflow-wrap: anywhere;
}

a {
  color: var(--accent);
}

a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible,
canvas:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--card);
  padding: 0.6rem 1rem;
  z-index: 10;
}

.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.shell {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 clamp(0.75rem, 3vw, 2rem);
}

.masthead {
  border-bottom: 1px solid var(--rule);
  padding: clamp(1.25rem, 4vw, 2.25rem) 0 0.75rem;
}

.masthead h1 {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 5vw, 2.5rem);
  line-height: 1.15;
  margin: 0 0 0.35rem;
  letter-spacing: -0.01em;
}

.masthead p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 62ch;
  font-size: 0.97rem;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  border-bottom: 1px solid var(--rule);
  margin-top: 1rem;
}

.tab {
  display: inline-block;
  padding: 0.6rem 0.95rem;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--ink);
  background: var(--rule-soft);
}

.tab[aria-selected="true"] {
  background: var(--card);
  border-color: var(--rule);
  color: var(--ink);
}

main {
  padding-bottom: 3rem;
}

section[role="tabpanel"] {
  padding-top: 1.25rem;
}

section[role="tabpanel"][hidden] {
  display: none;
}

h2 {
  font-family: var(--serif);
  font-size: clamp(1.2rem, 3.6vw, 1.6rem);
  margin: 2rem 0 0.5rem;
}

h3 {
  font-size: 1rem;
  margin: 1.4rem 0 0.4rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.lede {
  max-width: 68ch;
  color: var(--ink-soft);
  margin: 0.25rem 0 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: clamp(0.75rem, 2.5vw, 1.15rem);
  margin: 1rem 0;
}

.notice {
  background: var(--warn-bg);
  border: 1px solid var(--warn-rule);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin: 1rem 0;
  font-size: 0.93rem;
}

.notice strong {
  display: block;
  margin-bottom: 0.2rem;
}

.muted {
  color: var(--ink-faint);
  font-size: 0.88rem;
}

.mono {
  font-family: var(--mono);
  font-size: 0.85em;
  word-break: break-all;
}

/* --- plot ------------------------------------------------------------- */

.plot-frame {
  position: relative;
  width: 100%;
}

canvas.plot {
  display: block;
  width: 100%;
  height: clamp(300px, 46vh, 460px);
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  touch-action: manipulation;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.legend li {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.swatch {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  flex: 0 0 auto;
}

.swatch.early {
  background: var(--early);
}

.swatch.recent {
  background: var(--recent);
}

.swatch.candidate {
  background: var(--candidate);
}

.plot-help {
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin: 0.5rem 0 0;
}

/* --- controls --------------------------------------------------------- */

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  align-items: flex-end;
  margin: 1rem 0;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.field > span {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}

.field input,
.field select {
  font: inherit;
  font-size: 0.92rem;
  padding: 0.35rem 0.45rem;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--card);
  color: var(--ink);
  max-width: 100%;
}

.field input[type="search"] {
  width: min(16rem, 60vw);
}

fieldset.field-group {
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.35rem 0.65rem 0.55rem;
  margin: 0;
  min-width: 0;
}

fieldset.field-group legend {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  padding: 0 0.3rem;
}

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.9rem;
  font-size: 0.9rem;
}

.checks label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

button {
  font: inherit;
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--rule-soft);
}

button:disabled {
  color: var(--ink-faint);
  cursor: default;
}

/* --- detail ----------------------------------------------------------- */

.detail h3 {
  margin-top: 0;
}

.detail-title {
  font-family: var(--serif);
  font-size: 1.15rem;
  margin: 0 0 0.3rem;
}

dl.pairs {
  display: grid;
  grid-template-columns: minmax(8rem, max-content) 1fr;
  gap: 0.2rem 1rem;
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
}

dl.pairs dt {
  color: var(--ink-faint);
}

dl.pairs dd {
  margin: 0;
}

/* --- tables ----------------------------------------------------------- */

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
}

caption {
  text-align: left;
  padding: 0.55rem 0.7rem;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

th,
td {
  text-align: left;
  padding: 0.35rem 0.6rem;
  border-bottom: 1px solid var(--rule-soft);
  white-space: nowrap;
}

th {
  position: sticky;
  top: 0;
  background: var(--card);
  border-bottom: 1px solid var(--rule);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
  z-index: 1;
}

td.wrap,
th.wrap {
  white-space: normal;
  min-width: 14rem;
}

td.num,
th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

tbody tr[tabindex]:hover,
tbody tr[tabindex]:focus-visible {
  background: var(--rule-soft);
}

tbody tr[aria-selected="true"] {
  background: #eef4fc;
}

.pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0.6rem 0;
  font-size: 0.9rem;
}

.pager a,
.pager strong {
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  text-decoration: none;
}

.pager strong {
  background: var(--rule-soft);
}

ul.plain {
  list-style: none;
  padding: 0;
  margin: 0;
}

ul.notes {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  max-width: 78ch;
}

ul.notes li {
  margin-bottom: 0.5rem;
  font-size: 0.93rem;
  color: var(--ink-soft);
}

.terms {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  padding: 0;
  margin: 0.4rem 0 0;
  list-style: none;
}

.terms li {
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  font-size: 0.85rem;
  background: var(--card);
}

.terms li.early {
  border-color: var(--early);
  color: var(--early);
}

.terms li.recent {
  border-color: var(--recent);
  color: var(--recent);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.75rem;
  padding: 0;
  margin: 0.75rem 0 0;
  list-style: none;
}

.stats li {
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--card);
  padding: 0.55rem 0.7rem;
  min-width: 0;
}

.stats .value {
  display: block;
  font-family: var(--mono);
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
}

.stats .label {
  display: block;
  font-size: 0.78rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

footer.colophon {
  border-top: 1px solid var(--rule);
  padding: 1.25rem 0 3rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

footer.colophon h2 {
  font-size: 1rem;
  margin-top: 0;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-family: var(--sans);
}

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

/* --- generator-rendered table pages ----------------------------------- */

body.table-page main {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem clamp(0.75rem, 3vw, 2rem) 3rem;
}

body.table-page h1 {
  font-family: var(--serif);
  font-size: clamp(1.3rem, 4vw, 1.9rem);
  margin: 0 0 0.4rem;
}

@media (max-width: 560px) {
  th,
  td {
    padding: 0.3rem 0.45rem;
    font-size: 0.82rem;
  }

  dl.pairs {
    grid-template-columns: 1fr;
    gap: 0 0;
  }

  dl.pairs dt {
    margin-top: 0.45rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}