/* Medical Cost — chrome, ink and surfaces follow the reference data-viz palette
   so the charts and the interface around them read as one thing. */

:root {
  color-scheme: light;
  --plane: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --series: #2a78d6;
  --series-soft: #cde2fb;
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --plane: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --series: #3987e5;
    --series-soft: #184f95;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--plane);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}

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

/* --- shell --------------------------------------------------------------- */

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-weight: 700;
  font-size: 16px;
  padding: 16px 0;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.brand span { color: var(--muted); font-weight: 400; }

.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a {
  padding: 16px 12px;
  color: var(--ink-2);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.nav a:hover { color: var(--ink); }
.nav a.on { color: var(--series); border-bottom-color: var(--series); }

.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 24px 72px; }

h1 { font-size: 24px; margin: 0 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 17px; margin: 0 0 14px; }
h3 { font-size: 14px; margin: 0 0 10px; color: var(--ink-2); text-transform: uppercase; letter-spacing: 0.05em; }
.sub { color: var(--ink-2); margin: 0 0 24px; }

/* --- cards --------------------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.card.tight { padding: 0; overflow: hidden; }

.grid { display: grid; gap: 16px; }
.grid.cols-4 { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* --- stat tiles ---------------------------------------------------------- */

.tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.tile .label { color: var(--ink-2); font-size: 13px; margin-bottom: 6px; }
.tile .value { font-size: 27px; font-weight: 650; letter-spacing: -0.02em; }
.tile .note { color: var(--muted); font-size: 12px; margin-top: 4px; }

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

.scroll { overflow-x: auto; }

table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--grid); white-space: nowrap; }
th {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--muted); font-weight: 600; background: var(--surface);
  position: sticky; top: 0;
}
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr:hover { background: color-mix(in oklab, var(--series) 6%, transparent); }
tr.total td { font-weight: 700; border-top: 2px solid var(--axis); background: color-mix(in oklab, var(--ink) 4%, transparent); }
td.wide, th.wide { white-space: normal; min-width: 200px; }

/* --- buttons & forms ----------------------------------------------------- */

.btn {
  display: inline-block; padding: 9px 16px; border-radius: 8px;
  background: var(--series); color: #fff; border: 1px solid transparent;
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--ink-2); border-color: var(--border); }
.btn.ghost:hover { background: color-mix(in oklab, var(--ink) 5%, transparent); color: var(--ink); }
.btn.danger { background: var(--critical); }
.btn.lg { padding: 12px 22px; font-size: 16px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

input[type=text], input[type=search], input[type=date], input[type=number], select, textarea {
  font: inherit; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--axis); background: var(--surface); color: var(--ink);
  max-width: 100%;
}
input[type=file] { font: inherit; }
label.field { display: block; margin-bottom: 14px; }
label.field > span { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 5px; font-weight: 500; }

.row { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.row.between { justify-content: space-between; align-items: center; }

/* --- messages ------------------------------------------------------------ */

.flash { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 20px; border: 1px solid transparent; }
.flash.notice { background: color-mix(in oklab, var(--good) 14%, var(--surface)); border-color: color-mix(in oklab, var(--good) 40%, transparent); }
.flash.alert { background: color-mix(in oklab, var(--critical) 14%, var(--surface)); border-color: color-mix(in oklab, var(--critical) 40%, transparent); }

.callout { border-left: 3px solid var(--warning); background: color-mix(in oklab, var(--warning) 10%, var(--surface)); padding: 14px 16px; border-radius: 0 8px 8px 0; margin-bottom: 18px; }
.callout.bad { border-left-color: var(--critical); background: color-mix(in oklab, var(--critical) 10%, var(--surface)); }
.callout.ok { border-left-color: var(--good); background: color-mix(in oklab, var(--good) 10%, var(--surface)); }
.callout p { margin: 6px 0 0; }
/* Only the callout's own heading is a block — emphasis inside its text stays inline. */
.callout > strong { display: block; }

/* --- pills --------------------------------------------------------------- */

.pill { display: inline-flex; align-items: center; gap: 5px; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid var(--border); color: var(--ink-2); }
.pill.good { color: var(--good); border-color: color-mix(in oklab, var(--good) 45%, transparent); }
.pill.warn { color: color-mix(in oklab, var(--serious) 80%, var(--ink)); border-color: color-mix(in oklab, var(--serious) 50%, transparent); }
.pill.bad { color: var(--critical); border-color: color-mix(in oklab, var(--critical) 45%, transparent); }
.pill.mute { color: var(--muted); }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.nowrap { white-space: nowrap; }

/* --- charts -------------------------------------------------------------- */

.chart { width: 100%; height: auto; display: block; overflow: visible; }
.chart .bar { fill: var(--series); transition: opacity .12s; }
.chart g:hover .bar { opacity: .78; }
.chart .grid-line { stroke: var(--grid); stroke-width: 1; }
.chart .axis-line { stroke: var(--axis); stroke-width: 1; }
.chart .tick { fill: var(--muted); font-size: 11px; font-family: var(--font); }
.chart .value-label { fill: var(--ink-2); font-size: 11px; font-weight: 600; font-family: var(--font); font-variant-numeric: tabular-nums; }
.chart .hit { fill: transparent; }
.chart g:hover .hit { fill: color-mix(in oklab, var(--series) 8%, transparent); }

.empty { text-align: center; padding: 48px 20px; color: var(--muted); }
.empty h2 { color: var(--ink); }

@media (max-width: 640px) {
  .wrap { padding: 20px 14px 60px; }
  .topbar { padding: 0 14px; gap: 14px; }
  .nav a { padding: 12px 8px; font-size: 14px; }
}