/* Minimal monochrome: system sans for text, Times italic for accents, few lines. */
:root {
  --bg: #ffffff;
  --surface-2: #f3f3f3;
  --ink: #111111;
  --ink-2: #474747;
  --ink-3: #8c8c8c;
  --line: #e4e4e4;
  --accent: #111111;
  --accent-ink: #ffffff;
  --bar-you: #111111;
  --bar-them: #b5b5b5;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --serif: "Times New Roman", Times, "Liberation Serif", serif;
  font-family: var(--sans);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0c0c;
    --surface-2: #1b1b1b;
    --ink: #f2f2f2;
    --ink-2: #bcbcbc;
    --ink-3: #7c7c7c;
    --line: #262626;
    --accent: #f2f2f2;
    --accent-ink: #0c0c0c;
    --bar-you: #f2f2f2;
    --bar-them: #4f4f4f;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-size: 15px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--ink-3); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5rem; font-weight: 400; }
h1 { font-family: var(--serif); font-style: italic; font-size: 2.3rem; letter-spacing: -.01em; }
h2 { font-size: .78rem; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-2); margin-bottom: .9rem; }
h3 { font-size: 1rem; font-weight: 600; }
p { margin: 0 0 .75rem; }
em, .accent { font-family: var(--serif); font-style: italic; font-size: 1.08em; }
strong { font-weight: 600; }
.muted { color: var(--ink-3); }
.small { font-size: .85rem; }
code { font-family: ui-monospace, Consolas, monospace; font-size: .88em; background: var(--surface-2); padding: .05rem .3rem; }

/* Top bar */
.topbar { border-bottom: 1px solid var(--line); }
.topbar-inner { max-width: 1000px; margin: 0 auto; padding: 1.1rem 20px; display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.brand { color: var(--ink); text-decoration: none; font-weight: 600; letter-spacing: .02em; }
.brand span { font-family: var(--serif); font-style: italic; font-weight: 400; font-size: 1.15em; }
.nav { display: flex; gap: 1.4rem; margin-left: auto; align-items: baseline; flex-wrap: wrap; }
.nav a { color: var(--ink-3); text-decoration: none; font-size: .92rem; }
.nav a:hover, .nav a.active { color: var(--ink); }
.nav a.active { font-family: var(--serif); font-style: italic; font-size: 1.05rem; }
.nav form { margin: 0; }

.wrap { max-width: 1000px; margin: 0 auto; padding: 40px 20px 80px; }
.narrow { max-width: 400px; margin: 12vh auto; padding: 0 20px; }

/* Sections: separated by space and a single hairline, not boxes */
.card { padding: 28px 0 0; border-top: 1px solid var(--line); }
.narrow .card, .card.plain { border-top: 0; padding-top: 0; }
.grid { display: grid; gap: 40px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.stack > * + * { margin-top: 44px; }

/* Forms: underline fields */
label { display: block; font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-2); margin: 1.2rem 0 .35rem; }
input[type=text], input[type=email], input[type=password] {
  width: 100%; padding: .55rem 0; border: 0; border-bottom: 1px solid var(--line); border-radius: 0;
  background: transparent; color: var(--ink); font: inherit; font-size: 1rem;
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--ink); }
.code-input { font-size: 1.6rem; letter-spacing: .4em; text-align: center; font-variant-numeric: tabular-nums; }
.btn { display: inline-block; border: 1px solid var(--accent); border-radius: 0; padding: .65rem 1.3rem; font: inherit; font-size: .9rem;
  letter-spacing: .03em; cursor: pointer; background: var(--accent); color: var(--accent-ink); text-decoration: none; }
.btn:hover { opacity: .85; }
.btn:disabled { opacity: .35; cursor: not-allowed; }
.btn-block { width: 100%; margin-top: 1.6rem; text-align: center; }
.btn-quiet { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-quiet:hover { border-color: var(--ink); opacity: 1; }
.linklike { background: none; border: 0; color: var(--ink-3); font: inherit; font-size: .92rem; cursor: pointer; padding: 0; }
.linklike:hover { color: var(--ink); }

.alert { padding: .2rem 0 .2rem .9rem; margin-bottom: 1.2rem; font-size: .93rem; border-left: 2px solid var(--ink); }
.alert-error { color: var(--ink); }
.alert-ok { color: var(--ink-2); border-left-color: var(--ink-3); }

/* Dashboard */
.hero { display: grid; grid-template-columns: auto 1fr; gap: 40px; align-items: center; }
@media (max-width: 640px) { .hero { grid-template-columns: 1fr; gap: 16px; } }
.score { text-align: left; }
.score b { display: block; font-family: var(--serif); font-style: italic; font-weight: 400; font-size: 5.2rem; line-height: .9; font-variant-numeric: tabular-nums; }
.score small { font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--ink-3); }
.delta { font-size: .9rem; color: var(--ink-2); }
.delta.up, .delta.down { color: var(--ink); }
.summary { font-family: var(--serif); font-style: italic; font-size: 1.45rem; line-height: 1.35; }
.period { color: var(--ink-3); font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; margin-bottom: .5rem; }

.bars { width: 100%; }
.bar-row { display: grid; grid-template-columns: 150px 1fr 44px; gap: 14px; align-items: center; margin: 12px 0; font-size: .92rem; }
@media (max-width: 520px) { .bar-row { grid-template-columns: 100px 1fr 40px; } }
.bar-row svg { width: 100%; height: 6px; display: block; }
.bar-track { fill: var(--surface-2); }
.bar-you { fill: var(--bar-you); }
.bar-them { fill: var(--bar-them); }
.num { text-align: right; font-variant-numeric: tabular-nums; color: var(--ink-2); }

.trend svg { width: 100%; height: auto; display: block; }
.trend .grid-line { stroke: var(--line); stroke-width: 1; }
.trend .grid-label { fill: var(--ink-3); font-size: 11px; font-family: var(--sans); }
.trend .line { fill: none; stroke: var(--ink); stroke-width: 1.5; stroke-linejoin: round; }
.trend .dot { fill: var(--bg); stroke: var(--ink); stroke-width: 1.5; }
.trend .dot-label { fill: var(--ink-3); font-size: 11px; text-anchor: middle; font-family: var(--sans); }

table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .65rem .5rem .65rem 0; vertical-align: top; }
tbody tr + tr td { border-top: 1px solid var(--line); }
th { color: var(--ink-3); font-weight: 400; font-size: .72rem; text-transform: uppercase; letter-spacing: .12em; padding-bottom: .5rem; }
td.center, th.center { text-align: center; }
.table-scroll { overflow-x: auto; }
.yes { color: var(--ink); }
.no { color: var(--ink-3); }
.pill { display: inline-block; font-size: .78rem; color: var(--ink-2); white-space: nowrap; }
.pill::before { content: "· "; }
.pill-gap { font-family: var(--serif); font-style: italic; font-size: .95rem; color: var(--ink); }
.pill-gap::before { content: ""; }

ul.clean { list-style: none; padding: 0; margin: 0; }
ul.clean li { padding: .55rem 0; }
ul.clean li + li { border-top: 1px solid var(--line); }

.qr { background: #fff; padding: 10px; width: 210px; margin: 18px auto; }
.qr svg { width: 100%; height: auto; display: block; }
.secret { font-family: ui-monospace, Consolas, monospace; font-size: .95rem; letter-spacing: .06em; text-align: center; word-break: break-all; }
.codes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 20px; font-family: ui-monospace, Consolas, monospace; font-size: 1rem; margin: 1rem 0; }
.codes div { text-align: center; padding: .3rem 0; }
.steps { display: flex; gap: 6px; margin-bottom: 1.6rem; }
.steps span { flex: 1; height: 1px; background: var(--line); }
.steps span.on { background: var(--ink); }
.empty { text-align: left; padding: 24px 0; max-width: 560px; }
.auth-brand { display: block; text-align: center; font-size: 1rem; margin-bottom: 2.4rem; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: .4rem; }
.legend { display: flex; gap: 1.2rem; font-size: .8rem; color: var(--ink-3); }
.legend i { display: inline-block; width: 14px; height: 2px; margin-right: 6px; vertical-align: middle; }
.legend .you { background: var(--bar-you); }
.legend .them { background: var(--bar-them); }
.center-text { text-align: center; }
.spaced { margin-top: 1.2rem; }
.banner { color: var(--ink-2); font-size: .9rem; margin-bottom: 24px; }
.empty h2, .card > h1 + .muted + h2 { font-family: var(--serif); font-style: italic; font-weight: 400; font-size: 1.7rem; text-transform: none; letter-spacing: 0; color: var(--ink); }
.stack > .card:first-child { border-top: 0; padding-top: 0; }
/* Time-series charts: monochrome, series told apart by line pattern */
.chart { position: relative; }
.chart svg { width: 100%; height: auto; display: block; overflow: visible; }
.chart .grid-line { stroke: var(--line); stroke-width: 1; }
.chart .axis-label { fill: var(--ink-3); font-size: 11px; font-family: var(--sans); }
.chart .end-label { fill: var(--ink-2); font-size: 12px; font-family: var(--sans); }
.chart .crosshair { stroke: var(--ink-3); stroke-width: 1; }
.line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.pt { fill: var(--bg); stroke-width: 2; }
.ln-em { stroke: var(--ink); stroke-width: 3; }
.ln-0 { stroke: var(--ink); }
.ln-1 { stroke: var(--ink-2); stroke-dasharray: 7 4; }
.ln-2 { stroke: var(--ink-2); stroke-dasharray: 2 4; }
.ln-3 { stroke: var(--ink-3); }
.ln-4 { stroke: var(--ink-3); stroke-dasharray: 9 3 2 3; }
.ln-5 { stroke: var(--ink); stroke-dasharray: 12 5; }
.ln-6 { stroke: var(--ink-2); stroke-dasharray: 1 3; }
.ln-7 { stroke: var(--ink-3); stroke-dasharray: 4 3; }
.pt.ln-0, .pt.ln-1, .pt.ln-2, .pt.ln-3, .pt.ln-4, .pt.ln-5, .pt.ln-6, .pt.ln-7, .pt.ln-em { stroke-dasharray: none; }
.chart-legend { flex-wrap: wrap; margin: .2rem 0 .6rem; }
.chart-legend span { display: inline-flex; align-items: center; gap: 6px; }
.chart-tip { position: absolute; top: 0; background: var(--bg); border: 1px solid var(--line); padding: .4rem .6rem;
  font-size: .8rem; color: var(--ink); pointer-events: none; white-space: nowrap; z-index: 2; }
.chart-table { margin-top: .6rem; font-size: .85rem; }
.chart-table summary { cursor: pointer; color: var(--ink-3); }
.range-picker { margin: 0; }
input[type=checkbox], input[type=radio] { accent-color: var(--ink); }
details > summary { cursor: pointer; }
.filters { display: flex; gap: 1.1rem; flex-wrap: wrap; font-size: .88rem; }
.filters a { color: var(--ink-3); text-decoration: none; }
.filters a:hover { color: var(--ink); }
.filters a.on { color: var(--ink); font-family: var(--serif); font-style: italic; font-size: 1rem; }
.score-sm { font-family: var(--serif); font-style: italic; font-size: 1.6rem; font-variant-numeric: tabular-nums; }
.pt.dense { fill: transparent; stroke: transparent; }