:root {
  --ink: #1f2c35;
  --muted: #5b6b77;
  --soft: #eef4f7;
  --line: #d8e2e8;
  --ocean: #155f8f;
  --ocean-deep: #103b5b;
  --warn: #8a5b1f;
  --surface: #ffffff;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #f4f7f9;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
}
body [hidden] { display: none !important; }
a { color: var(--ocean); }
button, select { font: inherit; }
:is(a, button, select, summary):focus-visible { outline: 3px solid #2479b2; outline-offset: 4px; }
:is(button, select, summary) { min-height: 44px; }
:is(section, article)[id] { scroll-margin-top: 124px; }

.skip-link {
  position: fixed;
  left: 12px;
  top: -80px;
  z-index: 100;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.skip-link:focus { top: 10px; }
.climate-header { position: sticky; top: 0; z-index: 70; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.climate-shell { width: min(1240px, calc(100% - 48px)); margin: 0 auto; padding: 24px 0 48px; }

.climate-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .86fr) minmax(420px, 1.14fr);
  overflow: hidden;
  min-height: 430px;
  border-radius: 24px;
  background-color: #0b304c;
  background-image:
    linear-gradient(102deg, rgba(5, 27, 44, .96) 0%, rgba(8, 43, 66, .88) 46%, rgba(8, 39, 59, .76) 100%),
    url("/climate/media/noaa-psl-weekly-sst-anomaly-20260906-12.gif");
  background-position: center;
  background-size: cover;
  color: #fff;
}
.climate-hero__copy { align-self: center; padding: 48px 42px; }
.eyebrow { margin: 0 0 10px; color: #527283; font-size: .72rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; }
.climate-hero .eyebrow { color: #b8d8e8; }
.climate-hero h1 { margin: 0; font-size: clamp(2.5rem, 5vw, 4.5rem); line-height: 1.06; letter-spacing: -.055em; }
.climate-lede { max-width: 34rem; margin: 26px 0 30px; color: #d9eaf2; font-size: 1rem; line-height: 1.9; }
.climate-hero__actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; }
.climate-hero__actions a { display: inline-flex; align-items: center; min-height: 46px; color: #fff; text-decoration: none; }
.primary-action { display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 46px; padding: 0 20px; border-radius: 999px; background: #fff; color: var(--ocean-deep) !important; font-size: .88rem; font-weight: 700; text-decoration: none; }
.climate-now { align-self: stretch; display: flex; flex-direction: column; justify-content: center; padding: 38px 38px 58px; background: rgba(5, 24, 38, .36); border-left: 1px solid rgba(255,255,255,.16); backdrop-filter: blur(7px); -webkit-backdrop-filter: blur(7px); }
.climate-now__head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 18px; color: #d8edf6; }
.climate-now__head span { font-weight: 700; }
.climate-now__head small { color: #b8d8e8; text-align: right; }
.climate-now__grid { display: grid; gap: 1px; overflow: hidden; border: 1px solid rgba(255,255,255,.2); border-radius: 14px; background: rgba(255,255,255,.2); }
.climate-now article { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 5px 16px; padding: 17px 18px; background: rgba(8,37,56,.8); }
.climate-now article span { color: #bad8e7; font-size: .78rem; }
.climate-now article strong { grid-row: span 2; font-size: 1.2rem; font-weight: 650; }
.climate-now article small { color: #e4f0f5; font-size: .74rem; }
.climate-now .state-message { background: rgba(255,255,255,.1); color: #fff; }
.climate-hero__source { position: absolute; right: 22px; bottom: 17px; z-index: 2; color: rgba(225,240,247,.78); font-size: .66rem; line-height: 1.4; text-decoration: none; }
.climate-hero__source:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; }

.climate-chapters {
  position: sticky;
  top: 65px;
  z-index: 60;
  display: flex;
  justify-content: center;
  gap: 30px;
  overflow-x: auto;
  margin: 0 -1px 24px;
  padding: 0 18px;
  background: rgba(244,247,249,.96);
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}
.climate-chapters a { display: inline-flex; align-items: center; flex: 0 0 auto; min-height: 50px; color: #536773; font-size: .82rem; text-decoration: none; }
.climate-chapters a:hover { color: var(--ocean); text-decoration: underline; text-underline-offset: 6px; }

.climate-section { margin-top: 24px; padding: 30px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }
.section-heading, .subsection-heading, .card-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.section-heading { margin-bottom: 18px; }
.section-heading h2 { margin: 0; font-size: clamp(1.55rem, 3vw, 2.15rem); line-height: 1.3; letter-spacing: -.035em; }
.source-date, .subsection-heading > span { color: var(--muted); font-size: .78rem; text-align: right; }
.source-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.source-pills span { padding: 6px 10px; border-radius: 5px; background: var(--soft); color: #536b79; font-size: .72rem; }

.metric-grid { display: grid; overflow: hidden; gap: 1px; border: 1px solid var(--line); border-radius: 12px; background: var(--line); }
.metric-grid--four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.metric-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.metric-grid article { display: flex; flex-direction: column; gap: 8px; min-width: 0; padding: 18px; background: #fff; }
.metric-grid span, .metric-grid small { color: var(--muted); font-size: .75rem; line-height: 1.5; }
.metric-grid strong { color: #173d55; font-size: 1.18rem; line-height: 1.35; overflow-wrap: anywhere; }

.official-grid { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(330px, .82fr); gap: 20px; margin-top: 20px; }
.official-card, .chart-card, .forecast-card { min-width: 0; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: #fbfcfd; }
.card-heading { align-items: baseline; margin-bottom: 14px; }
.card-heading h3, .card-heading h4 { margin: 0; font-size: 1.05rem; }
.card-heading p { margin: 4px 0 0; color: var(--muted); font-size: .75rem; }
.card-heading > a { flex: 0 0 auto; font-size: .78rem; }
.archive-controls { display: grid; grid-template-columns: 44px auto minmax(130px, 1fr) 44px auto; align-items: center; gap: 8px; margin: 16px 0 8px; }
.archive-controls label { color: var(--muted); font-size: .76rem; }
.archive-controls :is(button, select) { border: 1px solid #cad7df; border-radius: 8px; background: #fff; color: #22475e; }
.archive-controls button { padding: 0 12px; }
.archive-controls select { width: 100%; padding: 0 10px; }
.archive-controls button:disabled { opacity: .4; cursor: not-allowed; }
.load-state { min-height: 24px; margin: 8px 0; color: var(--muted); font-size: .76rem; }
.official-figure { display: block; overflow: hidden; min-height: 260px; border-radius: 10px; background: #edf2f5; }
.official-figure img { display: block; width: 100%; height: auto; }
.figure-caption { display: grid; gap: 5px; margin-top: 12px; }
.figure-caption strong { font-size: .82rem; }
.figure-caption span, .reading, .source-note { color: #526571; font-size: .82rem; line-height: 1.8; }
.iri-figures { display: grid; gap: 12px; }
.iri-figures figure { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.iri-figures img { display: block; width: 100%; min-height: 150px; object-fit: contain; background: #f0f4f6; }
.iri-figures figcaption { padding: 7px 10px; color: var(--muted); font-size: .72rem; }

.subsection { margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--line); }
.subsection-heading { align-items: baseline; margin-bottom: 16px; }
.subsection-heading h3 { margin: 0; font-size: 1.35rem; letter-spacing: -.02em; }
.atmosphere-layout, .iod-layout, .agri-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: 20px; }
.chart-toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.chart-toolbar button { padding: 0 14px; border: 1px solid #cbd7de; border-radius: 999px; background: #fff; color: #415c6b; font-size: .78rem; }
.chart-toolbar button[aria-pressed="true"] { border-color: var(--ocean); background: var(--ocean); color: #fff; }
.chart-frame { position: relative; height: 300px; min-width: 0; padding: 10px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.chart-frame--iod { height: 360px; }
.forecast-card h4 { margin: 0 0 14px; }
.forecast-card > p { display: grid; gap: 4px; }
.forecast-card p span { color: var(--muted); font-size: .75rem; }
.forecast-card img { display: block; width: 100%; height: auto; margin-top: 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.caution, .state-message, .boundary-note { padding: 12px 14px; border-left: 3px solid #bd8a45; background: #fbf7ef; color: #6e5738; font-size: .78rem; line-height: 1.75; }
.state-message a { margin-left: 8px; }
.text-link { font-size: .78rem; }

.iod-layout { align-items: start; margin-top: 20px; }
.iod-observer-disclosure { margin: 2px 0 14px; border-bottom: 1px solid var(--line); }
.iod-observer-disclosure summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; color: #38596b; font-size: .8rem; font-weight: 700; cursor: pointer; }
.iod-observer-disclosure summary small { color: var(--muted); font-size: .7rem; font-weight: 500; text-align: right; }
.iod-observer-disclosure .reading { margin: 0 0 14px; padding-top: 2px; }
.probability-list { display: grid; gap: 12px; margin: 16px 0; }
.probability-item { display: grid; gap: 6px; }
.probability-item__head { display: flex; justify-content: space-between; gap: 12px; color: #435b69; font-size: .76rem; }
.probability-track { overflow: hidden; height: 7px; border-radius: 999px; background: #dfe7ec; }
.probability-track i { display: block; height: 100%; border-radius: inherit; background: #3185ad; }
.methodology { margin-top: 22px; border-top: 1px solid var(--line); }
.methodology summary { display: flex; align-items: center; color: #38596b; font-size: .82rem; cursor: pointer; }
.methodology p, .methodology li { color: #536773; font-size: .8rem; line-height: 1.8; }

.climate-section--agri { border-top: 4px solid #397f70; }
.agri-figure { margin: 0; min-width: 0; }
.agri-chart-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 10px; }
.agri-chart-toggle { display: inline-flex; gap: 3px; padding: 3px; border: 1px solid #cbd8df; border-radius: 10px; background: #edf3f5; }
.agri-chart-toggle button { min-height: 38px; padding: 0 14px; border: 0; border-radius: 7px; background: transparent; color: #49616e; font-size: .76rem; font-weight: 650; cursor: pointer; }
.agri-chart-toggle button[aria-pressed="true"] { background: #fff; color: #174f68; box-shadow: 0 1px 4px rgba(31, 61, 77, .14); }
.agri-chart-toolbar > span { color: var(--muted); font-size: .7rem; text-align: right; }
.agri-chart-stack { display: grid; gap: 8px; }
.chart-frame--agri-price { height: 390px; }
.agri-nino-panel { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.agri-nino-panel__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px 0; }
.agri-nino-panel__head strong { color: #254655; font-size: .78rem; }
.agri-nino-panel__head span { color: var(--muted); font-size: .68rem; text-align: right; }
.chart-frame--agri-nino { height: 170px; border: 0; border-radius: 0; }
.agri-chart-fallback { display: block; width: 100%; min-height: 280px; object-fit: contain; border: 1px solid var(--line); border-radius: 12px; background: #f1f4f5; }
.agri-figure figcaption { margin-top: 10px; color: var(--muted); font-size: .76rem; line-height: 1.75; }
.agri-latest { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: hidden; gap: 1px; border: 1px solid var(--line); border-radius: 12px; background: var(--line); }
.agri-latest article { min-width: 0; padding: 14px; background: #fff; }
.agri-latest span, .agri-latest small { display: block; color: var(--muted); font-size: .7rem; }
.agri-latest strong { display: block; margin: 5px 0; color: #21584c; font-size: 1rem; overflow-wrap: anywhere; }
.boundary-note { margin-top: 14px; border-left-color: #397f70; background: #f1f7f5; color: #405e55; }
.boundary-note p { margin-bottom: 0; }

.mechanism-card { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-top: 24px; padding: 28px 30px; border-radius: 18px; background: #143d56; color: #fff; }
.mechanism-card .eyebrow { color: #a9ccdc; }
.mechanism-card h2 { margin: 0; font-size: 1.45rem; }
.mechanism-card p:not(.eyebrow) { max-width: 760px; margin-bottom: 0; color: #d4e5ed; font-size: .84rem; line-height: 1.8; }
.mechanism-card .primary-action { flex: 0 0 auto; }
.climate-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 24px; padding: 28px 2px 0; color: var(--muted); font-size: .75rem; }

@media (max-width: 920px) {
  .climate-hero { grid-template-columns: 1fr; }
  .climate-now { border-left: 0; border-top: 1px solid rgba(255,255,255,.16); }
  .official-grid, .atmosphere-layout, .iod-layout, .agri-layout { grid-template-columns: 1fr; }
  .metric-grid--four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  html { scroll-behavior: auto; }
  .climate-shell { width: calc(100% - 28px); padding-top: 14px; }
  .climate-hero { min-height: 0; border-radius: 18px; }
  .climate-hero__copy { padding: 28px 22px; }
  .climate-now { padding: 28px 22px; }
  .climate-hero__source { position: static; display: block; padding: 0 22px 18px; background: rgba(5, 24, 38, .36); }
  .climate-hero h1 { font-size: 2.55rem; }
  .climate-lede { margin: 18px 0 24px; }
  .climate-now__head { display: grid; }
  .climate-now__head small { text-align: left; }
  .climate-now article { grid-template-columns: 1fr; }
  .climate-now article strong { grid-row: auto; }
  .climate-chapters { justify-content: flex-start; top: 57px; margin-bottom: 14px; }
  .climate-section { margin-top: 14px; padding: 22px 16px; border-radius: 14px; }
  .section-heading, .subsection-heading { display: grid; }
  .source-date, .subsection-heading > span { text-align: left; }
  .metric-grid--four, .metric-grid--three { grid-template-columns: 1fr 1fr; }
  .metric-grid article { padding: 14px; }
  .archive-controls { grid-template-columns: 44px minmax(0, 1fr) 44px; }
  .archive-controls label { grid-column: 1 / -1; }
  .archive-controls #enso-cpc-history-latest { grid-column: 1 / -1; }
  .official-card, .chart-card, .forecast-card { padding: 16px; }
  .official-figure { min-height: 180px; }
  .chart-frame { height: 250px; }
  .chart-frame--iod { height: 290px; }
  .chart-frame--agri-price { height: 340px; }
  .chart-frame--agri-nino { height: 170px; }
  .agri-chart-toolbar { align-items: flex-start; flex-direction: column; }
  .agri-chart-toolbar > span { text-align: left; }
  .mechanism-card { display: grid; padding: 24px 20px; }
  .mechanism-card .primary-action { width: 100%; }
  .climate-footer { display: grid; }
}

@media (max-width: 390px) {
  .metric-grid--four, .metric-grid--three { grid-template-columns: 1fr; }
  .agri-latest { grid-template-columns: 1fr; }
  .climate-hero__actions { align-items: stretch; }
  .climate-hero__actions a { width: 100%; justify-content: space-between; }
  .agri-chart-toggle { width: 100%; }
  .agri-chart-toggle button { flex: 1 1 0; }
  .agri-nino-panel__head { align-items: flex-start; flex-direction: column; }
  .agri-nino-panel__head span { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}