/* ==========================================================================
   Climate Dashboard design system
   Dark "observatory" theme by default; body.light flips the tokens.
   Keep color tokens in sync with src/theme.py.
   ========================================================================== */

@font-face {
  font-family: 'IBM Plex Sans';
  src: url('/assets/fonts/IBMPlexSans-Variable.ttf') format('truetype');
  font-weight: 100 700;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/assets/fonts/IBMPlexMono-Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/assets/fonts/IBMPlexMono-Medium.ttf') format('truetype');
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('/assets/fonts/IBMPlexMono-SemiBold.ttf') format('truetype');
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: 'Bricolage Grotesque';
  src: url('/assets/fonts/BricolageGrotesque-Variable.ttf') format('truetype');
  font-weight: 200 800;
  font-display: swap;
}

:root, body {
  --bg: #0b0e1a;
  --bg-raised: #12162a;
  --panel: #151a30;
  --line: rgba(232, 234, 242, 0.08);
  --line-strong: rgba(232, 234, 242, 0.16);
  --text: #e8eaf2;
  --text-dim: #9aa0b8;
  --text-faint: #61677f;
  --ember: #ff6b4a;
  --gold: #e8b84b;
  --teal: #4ecdc4;
  --violet: #a29bfe;
  --accent: var(--ember);
  --accent-soft: rgba(255, 107, 74, 0.14);
  --accent-line: rgba(255, 107, 74, 0.4);
  --topbar-bg: rgba(11, 14, 26, 0.82);
  --shadow: 0 18px 40px -24px rgba(0, 0, 0, 0.7);
  --display: 'Bricolage Grotesque', sans-serif;
  --body-font: 'IBM Plex Sans', -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', SFMono-Regular, monospace;
}

body.light {
  --bg: #faf9f6;
  --bg-raised: #ffffff;
  --panel: #ffffff;
  --line: rgba(31, 36, 48, 0.10);
  --line-strong: rgba(31, 36, 48, 0.20);
  --text: #1f2430;
  --text-dim: #5a6172;
  --text-faint: #9198a8;
  --ember: #d94f2e;
  --gold: #c08a1e;
  --teal: #0f9d94;
  --violet: #6c5ce7;
  --accent-soft: rgba(217, 79, 46, 0.10);
  --accent-line: rgba(217, 79, 46, 0.35);
  --topbar-bg: rgba(250, 249, 246, 0.85);
  --shadow: 0 14px 32px -22px rgba(31, 36, 48, 0.35);
}

/* per-tab accent (set on a wrapper div by the tab-switch callback) */
.accent-teal { --accent: var(--teal); --accent-soft: rgba(78, 205, 196, 0.12); --accent-line: rgba(78, 205, 196, 0.4); }
.accent-violet { --accent: var(--violet); --accent-soft: rgba(162, 155, 254, 0.12); --accent-line: rgba(162, 155, 254, 0.4); }
body.light .accent-teal { --accent-soft: rgba(15, 157, 148, 0.10); --accent-line: rgba(15, 157, 148, 0.35); }
body.light .accent-violet { --accent-soft: rgba(108, 92, 231, 0.10); --accent-line: rgba(108, 92, 231, 0.35); }

html { scroll-behavior: smooth; scrollbar-gutter: stable; }

body {
  background: var(--bg) !important;
  color: var(--text);
  font-family: var(--body-font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* atmosphere */
body::before {
  content: "";
  position: fixed; inset: 0;
  background:
    radial-gradient(1200px 600px at 75% -10%, var(--accent-soft), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(78, 205, 196, 0.05), transparent 60%);
  pointer-events: none; z-index: 0;
}
body::after {
  content: "";
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0; opacity: .5;
}
body.light::after { opacity: .35; }

#main-container { position: relative; z-index: 1; padding: 0 !important; }

/* ------------------------------------------------------------------ topbar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px;
  padding: 0 28px;
  height: 58px;
  background: var(--topbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  font-family: var(--display);
  font-weight: 700; font-size: 17px; letter-spacing: 0.01em;
  white-space: nowrap; color: var(--text);
}
.brand .dot { color: var(--accent); }
.brand .brand-sub {
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  color: var(--text-faint); letter-spacing: 0.14em; text-transform: uppercase;
}

#main-nav { gap: 4px; flex-wrap: nowrap; }
#main-nav .nav-link {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  text-transform: uppercase; text-decoration: none;
  white-space: nowrap; flex-shrink: 0;
  color: var(--text-dim);
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid transparent;
  background: none;
  transition: color .15s, border-color .15s;
}
#main-nav .nav-link:hover { color: var(--text); }
#main-nav .nav-link.tab-active-temp {
  color: var(--ember);
  border-color: var(--accent-line);
  background: var(--accent-soft);
}
#main-nav .nav-link.tab-active-enso {
  color: var(--teal);
  border-color: rgba(78, 205, 196, 0.35);
  background: rgba(78, 205, 196, 0.12);
}
#main-nav .nav-link.tab-active-models {
  color: var(--violet);
  border-color: rgba(162, 155, 254, 0.35);
  background: rgba(162, 155, 254, 0.12);
}

.topbar-right {
  margin-left: auto;
  display: flex; align-items: center; gap: 16px;
}
.live {
  display: flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-dim);
  white-space: nowrap;
}
.live .pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--teal);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(78, 205, 196, .5); }
  70% { box-shadow: 0 0 0 7px rgba(78, 205, 196, 0); }
  100% { box-shadow: 0 0 0 0 rgba(78, 205, 196, 0); }
}

/* toggle clusters: icon + dbc.Switch + icon */
.toggle-cluster {
  display: flex; align-items: center; gap: 6px;
  color: var(--text-faint);
}
.toggle-cluster i { font-size: 13px; width: 18px; text-align: center; cursor: pointer; }
.toggle-cluster i.tgl-on { color: var(--accent); }
.toggle-cluster .form-switch { margin: 0; min-height: 0; }
.toggle-cluster .form-check-input {
  cursor: pointer;
  background-color: var(--bg-raised);
  border-color: var(--line-strong);
  width: 2.2em; height: 1.15em;
  margin-top: 0;
}
.toggle-cluster .form-check-input:checked {
  background-color: var(--accent-soft);
  border-color: var(--accent-line);
}
.toggle-cluster .form-check-input:focus { box-shadow: none; border-color: var(--accent-line); }
/* Bootstrap's unchecked switch knob is rgba(0,0,0,.25) — invisible on the
   dark bg-raised track. The other toggles default to on, so only the °C/°F
   switch (default °C = unchecked) surfaces this. */
.toggle-cluster .form-check-input:not(:checked) {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%2361677f'/%3e%3c/svg%3e");
}
body.light .toggle-cluster .form-check-input:not(:checked) {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%239198a8'/%3e%3c/svg%3e");
}

/* °C/°F unit toggle: highlight whichever side is active (body.fahrenheit
   is maintained by the unit-switch clientside callback) */
.unit-cluster .unit-label {
  font-size: 12px; font-weight: 600; width: 18px; text-align: center;
  cursor: default; user-select: none;
}
.unit-cluster .unit-c { color: var(--accent); }
.unit-cluster .unit-f { color: var(--text-faint); }
body.fahrenheit .unit-cluster .unit-c { color: var(--text-faint); }
body.fahrenheit .unit-cluster .unit-f { color: var(--accent); }

/* ------------------------------------------------------------------ hero */
.hero {
  max-width: 1240px; margin: 0 auto;
  padding: 56px 32px 36px;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 48px;
  align-items: end;
}
.hero .kicker {
  font-family: var(--mono); font-size: 11.5px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 12px;
}
.hero .kicker::after {
  content: ""; height: 1px; width: 64px; background: var(--accent-line);
}
.hero h1 {
  font-family: var(--display);
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin-bottom: 18px;
  color: var(--text);
}
.hero h1 .num { font-weight: 700; color: var(--accent); white-space: nowrap; }
.hero h1 .pm { font-size: 0.45em; font-weight: 500; color: var(--text-dim); letter-spacing: 0; }
.hero .lede { color: var(--text-dim); font-size: 15.5px; max-width: 48ch; margin: 0; }
.hero .lede strong { color: var(--text); font-weight: 500; }
.hero .lede .gold { color: var(--gold); font-weight: 500; }

/* probability strip / gauge (hero right) */
.herostrip { padding-bottom: 6px; }
.herostrip .strip-label {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 12px;
  display: flex; justify-content: space-between; gap: 12px;
}
.herostrip .strip-label b { color: var(--text-dim); font-weight: 500; white-space: nowrap; }
.probbar {
  display: flex; height: 34px; border-radius: 8px; overflow: hidden;
  border: 1px solid var(--line-strong);
}
.probbar .seg {
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 11.5px; font-weight: 600;
  min-width: 0;
}
.striplegend {
  display: flex; gap: 16px; margin-top: 10px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.08em;
  color: var(--text-faint); text-transform: uppercase;
}
.striplegend .swatch {
  display: inline-block; width: 8px; height: 8px; margin-right: 6px;
  border-radius: 2px; vertical-align: baseline;
}

/* percentile gauge (models hero) */
.gauge-track {
  position: relative; height: 12px; border-radius: 999px;
  background: linear-gradient(90deg, #3d6aa8, #5a5f7a 50%, #a84d3d);
  border: 1px solid var(--line-strong);
}
.gauge-tick {
  position: absolute; top: -5px; bottom: -5px; width: 1px;
  background: rgba(232, 234, 242, .35);
}
body.light .gauge-tick { background: rgba(31, 36, 48, .3); }
.gauge-marker {
  position: absolute; top: 50%; transform: translate(-50%, -50%);
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--violet);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 1px var(--violet), 0 0 18px rgba(162, 155, 254, .5);
}
.gauge-ends {
  display: flex; justify-content: space-between; margin-top: 12px; gap: 8px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.08em;
  color: var(--text-faint); text-transform: uppercase;
}
.gauge-ends .mid { color: var(--violet); }

/* ------------------------------------------------------------------ KPI row */
.kpis {
  max-width: 1240px; margin: 0 auto;
  padding: 0 32px 48px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
}
.kpi {
  background: linear-gradient(180deg, rgba(232, 234, 242, .025), rgba(232, 234, 242, 0)), var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px 14px;
  position: relative;
  overflow: hidden;
  transition: border-color .2s, transform .2s;
}
body.light .kpi { background: var(--bg-raised); box-shadow: 0 2px 10px -6px rgba(31,36,48,.15); }
.kpi:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.kpi .k-label {
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.kpi .k-value {
  font-family: var(--mono); font-size: 24px; font-weight: 600;
  letter-spacing: -0.02em; line-height: 1.15;
  margin-bottom: 5px; color: var(--text);
}
.kpi .k-value small { font-size: 13.5px; color: var(--text-dim); font-weight: 500; }
.kpi .k-sub { font-size: 12.5px; color: var(--text-dim); line-height: 1.45; }
.kpi .k-sub .up { color: var(--ember); }
.kpi .k-sub .rank { color: var(--gold); }
.kpi::before {
  content: ""; position: absolute; top: 0; left: 20px; right: 20px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
  opacity: 0; transition: opacity .2s;
}
.kpi:hover::before { opacity: 1; }

/* ------------------------------------------------------------------ sections */
.block {
  max-width: 1240px; margin: 0 auto;
  padding: 0 32px 64px;
}
.sechead {
  display: flex; align-items: baseline; gap: 18px;
  border-top: 1px solid var(--line-strong);
  padding-top: 20px; margin-bottom: 6px;
  flex-wrap: wrap;
}
.sechead .no {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  color: var(--accent); letter-spacing: 0.1em;
}
.sechead h2 {
  font-family: var(--display); font-weight: 600;
  font-size: 24px; letter-spacing: -0.01em; margin: 0;
  color: var(--text);
}
.sechead .hint {
  margin-left: auto;
  font-family: var(--mono); font-size: 11px; color: var(--text-faint);
  letter-spacing: 0.1em; text-transform: uppercase;
  display: flex; align-items: center; gap: 14px;
}
.secdesc {
  color: var(--text-dim); max-width: 70ch; margin: 0 0 24px; font-size: 14.5px;
}

/* segmented control (restyles dbc.RadioItems rendered as button group) */
.segmented {
  display: inline-flex; align-items: center;
  border: 1px solid var(--line-strong); border-radius: 999px;
  overflow: hidden;
}
.segmented .btn, .segmented label {
  font-family: var(--mono) !important; font-size: 11px !important;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-dim) !important;
  background: none !important; border: none !important;
  padding: 5px 13px !important; margin: 0 !important;
  border-radius: 0 !important;
  cursor: pointer; box-shadow: none !important;
}
.segmented .btn-check:checked + .btn,
.segmented input:checked + label {
  background: var(--accent-soft) !important;
  color: var(--accent) !important;
}
.ctllabel {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-faint);
  margin-right: 10px;
}
.controlbar {
  display: flex; align-items: center; gap: 26px; flex-wrap: wrap;
  padding: 12px 18px;
  background: var(--bg-raised);
  border: 1px solid var(--line); border-radius: 12px;
  margin-bottom: 24px;
}
.controlbar .form-select {
  display: inline-block; width: auto;
  background-color: transparent;
  border: 1px solid var(--line-strong); border-radius: 8px;
  color: var(--text);
  font-family: var(--mono); font-size: 11.5px;
  padding: 5px 30px 5px 12px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239aa0b8' fill='none'/%3E%3C/svg%3E");
}
.controlbar .form-select option { background: var(--bg-raised); color: var(--text); }

/* ------------------------------------------------------------------ panels */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 22px;
  box-shadow: var(--shadow);
}
.panel .phead {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--line);
}
.panel .phead h3 {
  font-family: var(--body-font); font-weight: 600; font-size: 14.5px;
  letter-spacing: 0.01em; margin: 0; color: var(--text);
}
.panel .ptag {
  font-family: var(--mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--teal);
  border: 1px solid rgba(78, 205, 196, .3);
  padding: 2px 8px; border-radius: 999px;
  white-space: nowrap;
}
.panel .pbody { position: relative; }
.panel img { display: block; width: 100%; height: auto; }
.panel .pcap {
  padding: 11px 20px 13px;
  border-top: 1px solid var(--line);
  font-size: 13px; color: var(--text-dim);
}
.panel .pcap b, .panel .pcap strong { color: var(--text); font-weight: 500; }

.duo {
  display: grid; grid-template-columns: 1fr 1fr; gap: 22px;
  margin-bottom: 22px;
}
.duo .panel { margin-bottom: 0; }

/* dcc.Graph inside panels */
.panel .js-plotly-plot, .panel .dash-graph { background: var(--panel); }
.panel ._dash-loading-callback { background: transparent; }

/* ------------------------------------------------------------------ footer */
.footer {
  border-top: 1px solid var(--line);
  padding: 26px 32px 40px;
  max-width: 1240px; margin: 0 auto;
  display: flex; gap: 24px; align-items: baseline; flex-wrap: wrap;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em;
  color: var(--text-faint);
}
.footer a { color: var(--text-dim); text-decoration: none; border-bottom: 1px dotted var(--text-faint); }
.footer .right { margin-left: auto; }

/* ------------------------------------------------------------------ misc */
.tooltip { font-family: var(--body-font); font-size: 12px; }

/* methodology modal */
.modal-content {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
}
.modal-header {
  border-bottom: 1px solid var(--line);
  font-family: var(--display);
}
.modal-header .btn-close {
  filter: invert(1) grayscale(1);
  opacity: 0.6;
}
body.light .modal-header .btn-close { filter: none; }
.modal-body {
  font-size: 14px; color: var(--text-dim);
  max-height: 70vh; overflow-y: auto;
}
.modal-body h1, .modal-body h2, .modal-body h3 {
  font-family: var(--body-font); font-weight: 600;
  color: var(--text); font-size: 16px; margin-top: 1.2em;
}
.modal-body code {
  font-family: var(--mono); font-size: 12px;
  background: var(--bg-raised); color: var(--text);
  padding: 1px 5px; border-radius: 4px;
}
.modal-body table { font-size: 12.5px; }
.modal-body th, .modal-body td {
  border: 1px solid var(--line); padding: 4px 8px;
}

/* rank probability table (compact panel) */
.ranktable { width: 100%; }
.ranktable .rrow {
  display: flex; align-items: center; gap: 14px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.ranktable .rrow:last-child { border-bottom: none; }
.ranktable .rlabel { flex: 0 0 150px; color: var(--text); }
.ranktable .rholder { flex: 0 0 130px; font-family: var(--mono); font-size: 11px; color: var(--text-faint); }
.ranktable .rtrack {
  flex: 1; height: 8px; border-radius: 4px;
  background: var(--line); overflow: hidden;
}
.ranktable .rfill { height: 100%; border-radius: 4px; background: var(--accent); }
.ranktable .rpct {
  flex: 0 0 52px; text-align: right;
  font-family: var(--mono); font-size: 12px; font-weight: 600; color: var(--text);
}

/* ------------------------------------------------------------------ mobile */
@media (max-width: 900px) {
  .topbar { height: auto; flex-wrap: wrap; padding: 10px 16px; gap: 10px; }
  .topbar-right { margin-left: 0; width: 100%; justify-content: space-between; }
  .hero { grid-template-columns: 1fr; gap: 28px; padding: 36px 20px 28px; }
  .kpis { grid-template-columns: repeat(2, 1fr); padding: 0 20px 36px; }
  .block { padding: 0 20px 48px; }
  .duo { grid-template-columns: 1fr; }
  .sechead .hint { margin-left: 0; width: 100%; }
  .ranktable .rholder { display: none; }
  .ranktable .rlabel { flex-basis: 110px; }
}

/* page-level ONI/RONI index switch — pinned upper right of the ENSO tab */
.index-switch {
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px 32px 0;
  display: flex; justify-content: flex-end; align-items: center;
  position: relative; z-index: 5;
  margin-bottom: -44px;   /* overlap the hero's top padding, no layout shift */
}
.index-switch .ctllabel { font-size: 11.5px; }
.index-switch .segmented {
  border-color: var(--accent-line);
  background: var(--bg-raised);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.12);
}
.index-switch .segmented .btn, .index-switch .segmented label {
  font-size: 12.5px !important;
  padding: 7px 18px !important;
}
@media (max-width: 720px) {
  .index-switch { justify-content: flex-start; margin-bottom: 0; padding-top: 16px; }
}