@font-face {
  font-family: 'Geist';
  src: url(fonts/geist.woff2) format('woff2');
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Serif';
  src: url(fonts/instrument-serif-italic.woff2) format('woff2');
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'IBM Plex Mono';
  src: url(fonts/plex-mono-400.woff2) format('woff2');
  font-weight: 400;
  font-display: swap;
}

:root {
  color-scheme: light;

  --bg: #ffffff;
  --soft: #f5f7fb;
  --text: #0b1220;
  --muted: #5b6578;
  /* 4.7:1 on white: the smallest text. */
  --faint: #6b7489;
  /* 3.3:1 on white: large text only. */
  --quiet: #848da0;
  --border: #e4e8f0;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-soft: #e8efff;

  --sans: 'Geist', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --serif: 'Instrument Serif', Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
}

h1,
h2,
h3,
p {
  margin: 0;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  border-radius: 6px;
}

section {
  scroll-margin-top: 24px;
}

.wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* Header */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 22px;
}

.mark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.mark svg {
  width: 28px;
  height: 28px;
  flex: none;
}

.mark .tld {
  color: var(--faint);
  font-weight: 500;
}

.top nav {
  display: flex;
  gap: 30px;
  align-items: center;
  font-size: 15px;
  color: var(--muted);
}

.top nav a {
  text-decoration: none;
}

.top nav a:not(.btn):hover {
  color: var(--text);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 550;
  font-size: 15.5px;
  padding: 12px 20px;
  letter-spacing: -0.01em;
  transition:
    background-color 0.15s,
    box-shadow 0.15s,
    transform 0.15s;
}

.btn:active {
  transform: translateY(1px);
}

.btn-dark {
  background: var(--text);
  color: #fff;
}

.btn-dark:hover {
  background: #1f2a3d;
}

.btn-blue {
  background: var(--blue);
  color: #fff;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.2) inset,
    0 6px 20px rgba(37, 99, 235, 0.3);
}

.btn-blue:hover {
  background: var(--blue-dark);
}

.btn-line {
  border: 1px solid var(--border);
  color: var(--text);
  background: #fff;
}

.btn-line:hover {
  background: var(--soft);
}

.btn-white {
  background: #fff;
  color: var(--blue-dark);
}

.btn-white:hover {
  background: var(--blue-soft);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 14.5px;
}

/* Hero */

.hero {
  text-align: center;
  padding-top: 72px;
}

.pill {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px 5px 6px;
  font-size: 13.5px;
  color: var(--muted);
}

.pill b {
  background: var(--blue-soft);
  color: var(--blue-dark);
  border-radius: 999px;
  padding: 2px 9px;
  font-weight: 550;
  font-size: 12.5px;
}

.hero h1 {
  margin-top: 28px;
  font-weight: 650;
  font-size: clamp(40px, 7.4vw, 92px);
  line-height: 1;
  letter-spacing: -0.055em;
}

.hero h1 .pay {
  display: block;
  color: var(--quiet);
}

.hero h1 .value {
  font: italic 400 1.12em/1 var(--serif);
  letter-spacing: -0.02em;
  color: var(--blue);
  padding-right: 0.04em;
}

.attrib {
  margin-top: 22px;
  font-size: 14px;
  color: var(--faint);
}

.lede {
  margin: 26px auto 0;
  max-width: 660px;
  font-size: clamp(18px, 2vw, 20px);
  line-height: 1.55;
  color: var(--muted);
}

.lede b {
  color: var(--text);
  font-weight: 550;
}

.ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 34px;
}

.fine {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--faint);
}

/* The chart */

.stage {
  margin: 64px 0 0;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: linear-gradient(180deg, #fbfcfe, #f3f6fb);
  padding: 28px 32px 30px;
  box-shadow: 0 40px 80px -40px rgba(11, 18, 32, 0.18);
  text-align: left;
}

.stage-head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 18px;
}

.ticker {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.ticker b {
  font-size: 22px;
  letter-spacing: -0.02em;
}

.ticker span {
  color: var(--muted);
  font-size: 14.5px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  font-size: 13.5px;
  color: var(--muted);
}

.legend i {
  display: inline-block;
  width: 18px;
  height: 3px;
  border-radius: 2px;
  vertical-align: middle;
  margin-right: 7px;
}

.legend .price {
  background: var(--text);
}

.legend .worth {
  background: var(--blue);
}

.chart {
  position: relative;
}

.plot {
  position: relative;
}

/* Stretched to the box, so the chart can be taller on phones; the strokes keep their width. */
.plot svg {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 2;
  overflow: visible;
}

.plot svg * {
  vector-effect: non-scaling-stroke;
}

.chart .grid {
  stroke: var(--border);
}

.chart .discount {
  fill: rgba(37, 99, 235, 0.2);
}

.chart .worth-line {
  fill: none;
  stroke: var(--blue);
  stroke-width: 3.5;
  stroke-linejoin: round;
}

.chart .price-line {
  fill: none;
  stroke: var(--text);
  stroke-width: 2;
  stroke-linejoin: round;
}

.chart .connector {
  stroke: var(--blue);
  stroke-dasharray: 4 5;
}

/* Where the alert fires: the price's first close below the value line. */
.crossing {
  position: absolute;
  left: 79.28%;
  top: 68.5%;
  width: 14px;
  height: 14px;
  margin: -7px 0 0 -7px;
  border-radius: 50%;
  background: var(--blue);
  border: 2.5px solid #fff;
  box-shadow: 0 0 0 10px rgba(37, 99, 235, 0.18);
}

/* Labels sit on the chart in HTML, so they keep their size when the chart shrinks. */
.chart-label {
  position: absolute;
  font: 13px/1 var(--mono);
  color: var(--faint);
}

.axis-90 {
  left: 4px;
  top: calc(5% - 20px);
}

.axis-70 {
  left: 4px;
  top: calc(55% - 20px);
}

.zone {
  font: 600 13px/1.2 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.zone-premium {
  left: 30%;
  top: 44%;
  transform: translateX(-50%);
  color: var(--faint);
}

.zone-discount {
  right: 6%;
  top: 88%;
  color: var(--blue-dark);
}

.notif {
  position: absolute;
  left: calc(79.28% - 180px);
  top: -4%;
  width: 360px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 14px;
  box-shadow: 0 20px 40px -12px rgba(11, 18, 32, 0.25);
  font-size: 14px;
  line-height: 1.4;
}

.notif-app {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12.5px;
  margin-bottom: 5px;
}

.notif-app svg {
  width: 18px;
  height: 18px;
}

.notif-app span {
  margin-left: auto;
}

.notif b {
  font-weight: 600;
}

.notif p {
  color: var(--muted);
}

/* Features */

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 96px;
}

.feature {
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px 26px 28px;
}

.icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--blue-soft);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  color: var(--blue);
}

.icon svg {
  width: 21px;
  height: 21px;
}

.feature h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.feature p {
  color: var(--muted);
  font-size: 15.5px;
}

/* Sections */

.sec {
  padding-top: 110px;
}

.eyebrow {
  font-size: 14px;
  font-weight: 550;
  color: var(--blue);
  margin-bottom: 14px;
}

.sec h2 {
  font-size: clamp(34px, 4.6vw, 52px);
  line-height: 1.05;
  font-weight: 650;
  letter-spacing: -0.045em;
  max-width: 760px;
}

.sec h2 span {
  color: var(--quiet);
}

/* Metrics and the alert form */

.builder {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
  margin-top: 52px;
}

.metric-groups {
  display: grid;
  gap: 14px;
}

.metric-groups h3 {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 8px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chips li {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 14px;
}

.chips .on {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.form {
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  background: var(--soft);
}

.form h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 16px;
}

.fields {
  display: grid;
  grid-template-columns: 1fr 1.3fr 0.9fr 0.8fr;
  gap: 10px;
}

.field {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 14px;
}

.field small {
  display: block;
  font-size: 11.5px;
  color: var(--faint);
  font-weight: 500;
  margin-bottom: 2px;
}

.field b {
  font-weight: 600;
  font-size: 17px;
}

.field.focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.preview {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-radius: 12px;
  background: #fff;
  border: 1px dashed #c9d3e6;
  font-size: 15px;
}

.preview code {
  font: 14px var(--mono);
  color: var(--blue-dark);
}

.preview span {
  color: var(--muted);
  font-size: 14px;
}

.preview .away {
  color: #92400e;
  background: #fef3c7;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 13px;
  font-weight: 550;
}

/* How it works */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin: 52px 0 0;
  padding: 36px 0 0;
  border-top: 1px solid var(--border);
  list-style: none;
}

.steps .n {
  font: 13px var(--mono);
  color: var(--blue);
  margin-bottom: 14px;
}

.steps h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.steps p {
  color: var(--muted);
  font-size: 16px;
}

/* Closing */

.band {
  margin-top: 120px;
  border-radius: 28px;
  background: radial-gradient(120% 140% at 0% 0%, #2563eb 0%, #1d4ed8 45%, #172554 100%);
  color: #fff;
  padding: 72px 64px;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: end;
}

.band h2 {
  font-size: clamp(36px, 4.7vw, 54px);
  line-height: 1.02;
  font-weight: 650;
  letter-spacing: -0.045em;
}

.band h2 em {
  font: italic 400 1.1em var(--serif);
  letter-spacing: -0.01em;
}

.band p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 18px;
  margin-top: 18px;
}

.band .end {
  text-align: right;
}

.band .fine {
  color: rgba(255, 255, 255, 0.8);
}

.not-found {
  padding-top: 18vh;
  padding-bottom: 18vh;
}

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  padding-top: 36px;
  padding-bottom: 40px;
  font-size: 13.5px;
  color: var(--faint);
}

/* Tablets */

@media (max-width: 980px) {
  .features {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .feature {
    display: grid;
    grid-template-columns: 40px 1fr;
    gap: 0 18px;
  }

  .feature .icon {
    grid-row: span 2;
    margin-bottom: 0;
  }

  .builder {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .band {
    grid-template-columns: 1fr;
    padding: 56px 40px;
    align-items: start;
  }

  .band .end {
    text-align: left;
  }
}

/* Phones */

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .wrap {
    padding: 0 20px;
  }

  .top nav .link {
    display: none;
  }

  .hero {
    padding-top: 40px;
  }

  .hero h1 .pay {
    display: inline;
  }

  .stage {
    margin-top: 44px;
    margin-inline: -4px;
    padding: 20px 16px;
    border-radius: 18px;
  }

  .stage-head {
    flex-direction: column;
  }

  .plot svg {
    aspect-ratio: auto;
    height: 240px;
  }

  .zone-premium {
    top: 60%;
    left: 42%;
  }

  .zone .long,
  .chart .connector {
    display: none;
  }

  .notif {
    position: static;
    width: auto;
    margin-top: 28px;
  }

  .features {
    margin-top: 64px;
  }

  .sec {
    padding-top: 80px;
  }

  .fields {
    grid-template-columns: 1fr 1fr;
  }

  .form {
    padding: 20px;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-top: 36px;
    padding-top: 28px;
  }

  .band {
    margin-top: 80px;
    padding: 40px 24px;
    border-radius: 22px;
  }

  .band .btn {
    width: 100%;
  }
}

code {
  font: 0.9em var(--mono);
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.05em 0.35em;
}