/* Layout: slim and light, in the arq look. White page, one family (Roboto 300/400/500),
   anthracite text, blue shades for Democratic, arq crimson shades for Republican.
   A deliberate single light theme: every colour is set explicitly. */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --ink: #2f3639;          /* arq anthracite */
  --ink-2: #555c60;
  --muted: #737a7f;
  --line: #e3e6e8;
  --grid: #f0f2f3;
  --panel: #f6f7f8;
  --accent: #135b49;       /* arq green, for links, focus and markers only */
  --accent-soft: #f1f5f0;  /* arq tint */

  /* Party scale: darker = safer. Republican arm from arq crimson #bb2649. */
  --d3: #24508f; --d2: #5d86c2; --d1: #aac0e3;
  --mid: #e1e3e4;
  --r1: #e6b2bd; --r2: #cf6880; --r3: #bb2649;
  --on-d3: #ffffff; --on-d2: #ffffff; --on-d1: #2f3639;
  --on-mid: #2f3639;
  --on-r1: #2f3639; --on-r2: #ffffff; --on-r3: #ffffff;
  --pending: #f0f2f3;
  --pending-ink: #737a7f;
  --norace: transparent;

  --font: "Roboto", "Segoe UI", system-ui, -apple-system, sans-serif;
  --radius: 4px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 300 14px/1.5 var(--font); }
strong, b { font-weight: 500; }
a { color: var(--accent); text-decoration: none; border-bottom: 1px solid #c9d8d2; }
a:hover { border-bottom-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
p { margin: 0; }
h2, h3 { font-weight: 300; margin: 0; text-wrap: balance; letter-spacing: 0; }
h2 { font-size: 1.3rem; line-height: 1.2; }
h3 { font-size: 0.95rem; line-height: 1.3; font-weight: 400; }
.muted { color: var(--muted); }
.num, td.num { font-variant-numeric: tabular-nums; }

/* Slim top line */
.topbar { border-bottom: 1px solid var(--line); background: var(--bg); }
.topbar-inner, .page {
  max-width: 1120px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.topbar-inner { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 20px; padding-block: 9px; }
.brand { font-size: 1rem; font-weight: 400; }
.topnav { display: flex; flex-wrap: wrap; gap: 2px 16px; font-size: 0.82rem; }
.topnav a { color: var(--ink-2); border-bottom: 0; }
.topnav a:hover { color: var(--accent); }
.topbar-meta { width: 100%; display: flex; flex-wrap: wrap; gap: 2px 12px; font-size: 0.74rem; color: var(--muted); }

.page { padding-block: 18px 48px; display: grid; gap: 34px; }
.lede { font-size: 1.05rem; line-height: 1.45; max-width: 56rem; }

/* Sections */
.section { display: grid; gap: 10px; min-width: 0; }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 2px 14px; padding-bottom: 5px; border-bottom: 1px solid var(--line); }
.section-head .muted { font-size: 0.78rem; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 13px 14px; min-width: 0; background: var(--bg); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 760px) { .grid-2 { grid-template-columns: minmax(0, 1fr); } }

/* Chamber cards */
.chamber { display: grid; gap: 9px; }
.chamber-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.chamber-head .muted { font-size: 0.76rem; }
.odds { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.odds-side { display: grid; gap: 0; }
.odds-side.right { text-align: right; }
.odds-party { font-size: 0.76rem; color: var(--muted); }
.odds-value { font-weight: 300; font-size: clamp(2rem, 4.5vw, 2.6rem); line-height: 1.05; font-variant-numeric: tabular-nums; }
.odds-side:first-child .odds-value { color: var(--d3); }
.odds-side.right .odds-value { color: var(--r3); }
.split-bar { display: flex; gap: 2px; height: 6px; background: var(--pending); border-radius: 3px; overflow: hidden; }
.split-bar span { display: block; height: 100%; }
.split-bar .d { background: var(--d2); }
.split-bar .r { background: var(--r2); }
.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding-top: 4px; }
.fact-label { font-size: 0.72rem; color: var(--muted); }
.fact-value { font-size: 0.95rem; font-weight: 400; font-variant-numeric: tabular-nums; }

/* Contest entry: the answers to the HKS contest, first and largest on the page */
.contest-intro { max-width: 56rem; color: var(--ink-2); font-size: 0.86rem; }
.contest-top { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.contest-answer { display: grid; gap: 2px; padding: 12px 16px; border: 1px solid var(--line); border-radius: var(--radius); border-top: 3px solid var(--ink); }
.contest-q { font-size: 0.82rem; color: var(--ink-2); font-weight: 400; }
.contest-a { font-size: clamp(2.8rem, 6vw, 3.8rem); font-weight: 400; line-height: 1; font-variant-numeric: tabular-nums; color: var(--d3); }
.contest-sub { font-size: 0.76rem; color: var(--muted); }
.contest-districts { display: grid; gap: 6px; }
.contest-axis, .contest-row-main { display: grid; grid-template-columns: 170px 64px minmax(0, 1fr); gap: 14px; align-items: center; }
.contest-row { padding-block: 7px; border-top: 1px solid var(--line); display: grid; gap: 3px; }
.contest-name { display: grid; line-height: 1.25; }
.contest-name strong { font-weight: 400; font-size: 0.95rem; }
.contest-name span { font-size: 0.74rem; color: var(--muted); }
.contest-p { font-size: 1.7rem; font-weight: 400; font-variant-numeric: tabular-nums; color: var(--d3); }
.contest-detail { margin-left: calc(170px + 64px + 28px); display: grid; gap: 1px; font-size: 0.76rem; color: var(--ink-2); }
.contest-detail .check { color: var(--ink); }
.mark-fund { width: 9px; height: 9px; border: 1.5px solid var(--muted); background: var(--bg); }
.gap-track .mark-fund { top: 4.5px; margin-left: -4.5px; }
@media (max-width: 760px) {
  .contest-top { grid-template-columns: minmax(0, 1fr); }
  .contest-axis, .contest-row-main { grid-template-columns: 1fr 64px; }
  .contest-axis > span:nth-child(-n+2), .contest-axis { display: none; }
  .contest-row-main .gap-track { grid-column: 1 / -1; }
  .contest-detail { margin-left: 0; }
}

/* Try your own weights */
.whatif-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 14px; align-items: start; }
.whatif-controls { display: grid; gap: 10px; }
.whatif-controls fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: 5px; }
.whatif-controls legend { font-weight: 400; color: var(--ink); margin-bottom: 2px; padding: 0; font-size: 0.86rem; }
.whatif-controls label { font-size: 0.82rem; display: flex; gap: 8px; align-items: baseline; }
.whatif-controls input[type="radio"] { accent-color: var(--accent); }
.slider { display: grid !important; grid-template-columns: 100px minmax(0, 1fr) 70px; align-items: center !important; }
.slider input[type="range"] { width: 100%; accent-color: var(--accent); }
.slider output { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink-2); }
.small { font-size: 0.76rem; }
.button { font: 400 0.84rem var(--font); color: var(--bg); background: var(--accent); border: 0; border-radius: var(--radius); padding: 8px 14px; cursor: pointer; justify-self: start; }
.button:hover { background: #0e4a3b; }
.whatif-results { display: grid; gap: 10px; }
.whatif-results tr.changed td { background: var(--accent-soft); }
.whatif-results tr.changed td:nth-child(2) { font-weight: 500; }
@media (max-width: 760px) { .whatif-grid { grid-template-columns: minmax(0, 1fr); } .slider { grid-template-columns: 90px minmax(0, 1fr) 64px; } }

/* How this forecast is made: four steps in sequence */
.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; counter-reset: step; }
.flow-step { position: relative; padding: 4px 22px 4px 0; display: grid; gap: 6px; align-content: start; counter-increment: step; }
.flow-step + .flow-step { padding-left: 22px; border-left: 1px solid var(--line); }
.flow-step h3::before { content: counter(step); display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; margin-right: 8px;
  border: 1px solid var(--accent); border-radius: 50%; color: var(--accent); font-size: 0.8rem; font-weight: 400; vertical-align: 1px; }
.flow-step p { font-size: 0.8rem; color: var(--ink-2); }
@media (max-width: 860px) {
  .flow { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .flow-step, .flow-step + .flow-step { padding: 0 0 0 16px; border-left: 2px solid var(--line); }
}

/* Which races decide control */
.tip-summary { font-size: 0.95rem; }
.chart text.tip-axis { font-size: 10.5px; }

/* Races to watch: non-safe races from most Democratic to most Republican */
.watch { display: grid; gap: 18px; }
.watch-block { display: grid; gap: 8px; }
.watch-block h3 .muted { font-size: 0.9rem; font-weight: 300; }
.watch-groups { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: flex-start; }
.watch-group { display: grid; gap: 5px; }
.watch-group-label { font-size: 0.78rem; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 4px; }
.race-chip { display: inline-flex; align-items: baseline; gap: 5px; padding: 3px 8px; border-radius: 3px; font-size: 0.88rem; font-weight: 400;
  font-variant-numeric: tabular-nums; cursor: pointer; border: 0; font-family: var(--font); line-height: 1.4; }
.race-chip .p { font-weight: 300; }
.race-chip:hover { outline: 1.5px solid var(--ink); outline-offset: 1px; }

/* Explainers */
.explainers { display: grid; gap: 0; border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; padding: 6px 0; color: var(--ink-2); font-weight: 400; font-size: 0.86rem; display: flex; gap: 10px; align-items: baseline; }
summary::-webkit-details-marker { display: none; }
summary::before { content: "+"; width: 14px; color: var(--accent); font-weight: 400; }
details[open] summary::before { content: "−"; }
summary:hover { color: var(--accent); }
.explain { padding: 0 0 10px 24px; max-width: 56rem; display: grid; gap: 6px; color: var(--ink); font-size: 0.84rem; }
.explain table { width: auto; }

/* Joint control bar */
.joint-bar { display: flex; gap: 2px; height: 22px; border-radius: 3px; overflow: hidden; background: var(--pending); }
.joint-bar span { display: block; height: 100%; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 0.78rem; color: var(--ink-2); }
.legend-item { display: inline-flex; align-items: center; gap: 7px; }
.swatch { width: 12px; height: 12px; border-radius: 2px; flex: none; }
.swatch.pending { background: var(--pending); border: 1px dashed var(--pending-ink); }
.swatch.norace { background: none; border: 1px dashed var(--muted); }
.swatch.newmap { background: none; border: 1.5px dashed var(--ink-2); }

/* Charts and maps */
.chart { width: 100%; height: auto; display: block; overflow: visible; }
.chart text { font-family: var(--font); font-size: 11px; font-weight: 400; font-variant-numeric: tabular-nums; }
.chart text:not([fill]) { fill: var(--muted); }
.chart .axis { stroke: var(--line); }
.chart .gridline { stroke: var(--grid); }
.chart .majority { stroke: var(--ink); stroke-dasharray: 3 3; }
.chart text.majority-label { fill: var(--ink); }
.chart text.empty-note { font-size: 14px; font-weight: 300; }
.map-stack { display: grid; gap: 20px; }
.map-wrap { overflow-x: auto; }
.map-senate { max-width: 680px; margin: 0 auto; }
.map-house { max-width: 900px; margin: 0 auto; }
.chart text.tile-label { font-size: 16px; font-weight: 400; pointer-events: none; }
.chart text.tile-sub { font-size: 10.5px; pointer-events: none; }
.chart text.house-label { font-size: 10px; pointer-events: none; }
.chart text.house-label:not([fill]) { fill: var(--ink-2); }
.seat { cursor: pointer; }
.seat:hover, .seat.selected { stroke: var(--ink); stroke-width: 1.5; }
.state-tile { cursor: pointer; }
.state-tile:hover > .tile-bg { stroke: var(--ink); }

/* Tooltip */
.tooltip {
  position: fixed; z-index: 20; pointer-events: none; max-width: 300px;
  background: var(--bg); color: var(--ink); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 6px 20px rgb(47 54 57 / 0.12); padding: 10px 12px; font-size: 0.88rem; line-height: 1.4;
}
.tooltip strong { font-weight: 500; display: block; margin-bottom: 2px; }
.tooltip .row { display: flex; justify-content: space-between; gap: 14px; }
.tooltip .row span:first-child { color: var(--muted); }
.tooltip .row span:last-child { font-variant-numeric: tabular-nums; text-align: right; }

/* Tables */
.table-wrap { overflow-x: auto; border-top: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
th, td { text-align: left; padding: 4px 10px 4px 0; border-bottom: 1px solid var(--grid); white-space: nowrap; }
th { font-size: 0.72rem; color: var(--muted); font-weight: 400; background: var(--bg); position: sticky; top: 0; }

/* Assumptions table: wrapping text, groups as divider rows */
table.assumptions td { white-space: normal; vertical-align: top; }
table.assumptions td:nth-child(1) { width: 18%; }
table.assumptions td.value { width: 22%; font-weight: 400; }
table.assumptions td:nth-child(3) { width: 24%; }
table.assumptions tr.group-row td { padding-top: 10px; font-size: 0.72rem; color: var(--accent); font-weight: 400; border-bottom: 1px solid var(--line); }
#bridge tr.final td { background: var(--accent-soft); font-weight: 400; }
#bridge tr.reference td { color: var(--muted); }
td.num, th.num { text-align: right; }
tbody tr:hover, tbody tr.highlight { background: var(--panel); }
.race-table-wrap { max-height: 560px; overflow: auto; }
#bridge td:nth-child(2) { white-space: normal; min-width: 240px; }
.chip { display: inline-flex; align-items: center; gap: 6px; }
.prob-cell { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.prob-track { width: 64px; height: 6px; border-radius: 3px; background: var(--r1); overflow: hidden; display: flex; }
.prob-track span { background: var(--d2); height: 100%; display: block; }
.empty-row td { color: var(--muted); white-space: normal; text-align: center; padding: 20px; }
.input-cell { color: var(--ink-2); }
.gap-badge { font-size: 0.72rem; color: var(--ink-2); border: 1px solid var(--line); border-radius: 3px; padding: 0 4px; margin-left: 6px; }

.filters { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; }
.filters label { font-size: 0.9rem; color: var(--ink-2); display: inline-flex; align-items: center; gap: 6px; }
.filters input[type="search"], .filters select {
  font: 300 0.95rem var(--font); color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 5px 9px;
}
.filters input[type="search"] { width: 220px; max-width: 100%; }
.link-button { font: 400 0.9rem var(--font); color: var(--accent); background: none; border: 0; cursor: pointer; padding: 0; justify-self: start; }

/* Polls vs markets: one row per race, three marks on a shared 0-100% track */
.mark { display: inline-block; width: 11px; height: 11px; flex: none; }
.mark-polls { border-radius: 50%; border: 1.5px solid var(--ink); background: var(--bg); }
.mark-market { background: var(--accent); transform: rotate(45deg) scale(0.8); }
.mark-model { width: 2px; height: 15px; background: var(--ink); }
.gap-card { display: grid; gap: 2px; }
.gap-axis, .gap-row { display: grid; grid-template-columns: 150px minmax(0, 1fr) 52px; gap: 12px; align-items: center; }
.gap-scale { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--muted); }
.gap-rows { display: grid; }
.gap-row { padding-block: 5px; border-top: 1px solid var(--grid); }
.gap-row:hover, .gap-row:focus-visible { background: var(--panel); }
.gap-label { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; font-weight: 400; min-width: 0; white-space: nowrap; }
.gap-flag { font-size: 0.7rem; color: var(--ink-2); border: 1px solid var(--line); border-radius: 3px; padding: 0 4px; font-weight: 400; }
.gap-flag.watch { color: var(--muted); }
.gap-track { position: relative; height: 18px; background: linear-gradient(to right, transparent calc(50% - 0.5px), var(--line) calc(50% - 0.5px), var(--line) calc(50% + 0.5px), transparent calc(50% + 0.5px)); }
.gap-track .span { position: absolute; top: 8px; height: 1.5px; background: var(--muted); opacity: 0.6; }
.gap-track .mark { position: absolute; top: 3.5px; margin-left: -5.5px; }
.gap-track .mark-model { top: 1.5px; margin-left: -1px; }
.gap-value { font-variant-numeric: tabular-nums; font-size: 0.9rem; text-align: right; }
@media (max-width: 520px) { .gap-axis, .gap-row { grid-template-columns: 86px minmax(0, 1fr) 40px; gap: 8px; } .gap-flag { display: none; } }

/* National environment */
.env-big { font-weight: 300; font-size: 2.4rem; line-height: 1.1; font-variant-numeric: tabular-nums; }
.kv { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.kv li { display: grid; gap: 2px; padding-top: 8px; border-top: 1px solid var(--grid); }
.kv .k { font-size: 0.9rem; color: var(--ink-2); justify-self: start; }
.kv .v { font-size: 0.92rem; font-variant-numeric: tabular-nums; }

/* Method and sources */
.method { display: grid; gap: 14px; max-width: 60rem; font-size: 0.86rem; }
.method .lede { font-size: 0.95rem; }
.steps { margin: 0; padding-left: 1.4rem; display: grid; gap: 7px; }
.steps li { padding-left: 4px; }
.steps li::marker { color: var(--muted); }
.bands { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px 20px; font-size: 0.92rem; }
.timeline { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.timeline li { display: grid; grid-template-columns: 70px minmax(0, 1fr); gap: 12px; }
.timeline .when { color: var(--muted); font-variant-numeric: tabular-nums; }
.source-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; font-size: 0.84rem; }
.source-group { display: grid; gap: 6px; align-content: start; }
.source-group ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.source-group li { display: grid; gap: 0; }
.source-group li a { justify-self: start; }
.source-group li span { font-size: 0.76rem; color: var(--muted); }

.notice { border: 1px solid var(--line); padding: 14px 16px; border-radius: var(--radius); }
footer { color: var(--muted); font-size: 0.88rem; border-top: 1px solid var(--line); padding-top: 16px; display: grid; gap: 6px; }

@media (prefers-reduced-motion: no-preference) {
  .split-bar span, .joint-bar span { transition: width 400ms ease; }
}