:root {
  color-scheme: dark;
  --ink: #1d1725;
  --deep: #110d17;
  --paper: #f5f0e7;
  --paper-muted: #c8becf;
  --coral: #ff775f;
  --mint: #b9ffcf;
  --violet: #9b7cff;
  --line: rgb(245 240 231 / 18%);
  --display: "Arial Black", "Avenir Next", "Segoe UI", sans-serif;
  --body: "Avenir Next", Avenir, "Segoe UI", system-ui, sans-serif;
  --mono: "SFMono-Regular", "Cascadia Code", Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--ink); color: var(--paper); font-family: var(--body); }
button, input, select { font: inherit; }
button { color: inherit; }
.site-header, main, footer { width: min(1240px, calc(100% - 56px)); margin-inline: auto; }

.site-header { min-height: 78px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; font: .66rem/1 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.brand-orbit { position: relative; width: 32px; height: 32px; border: 1px solid var(--coral); border-radius: 50%; }
.brand-orbit::before, .brand-orbit::after { content: ""; position: absolute; inset: 5px; border: 1px solid var(--violet); border-radius: 50%; }
.brand-orbit::after { inset: 11px; background: var(--mint); border: 0; }
.privacy { display: flex; align-items: center; gap: 9px; color: var(--paper-muted); font: .62rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.privacy i { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 4px rgb(185 255 207 / 10%); }

.hero { min-height: 720px; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(360px, .8fr); gap: 6vw; align-items: center; padding: 84px 0 90px; }
.kicker { margin: 0 0 24px; color: var(--coral); font: .66rem/1.35 var(--mono); letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 38px; font: 900 clamp(4.1rem, 7.4vw, 8.2rem)/.83 var(--display); letter-spacing: -.073em; text-transform: uppercase; }
h1 em { color: var(--mint); font-family: Georgia, serif; font-weight: 400; text-transform: none; }
.intro { max-width: 700px; margin-bottom: 30px; color: var(--paper-muted); font-size: 1.08rem; line-height: 1.7; }
.example-button, .reset-button { padding: 0 0 7px; border: 0; border-bottom: 1px solid currentColor; background: transparent; cursor: pointer; font: .65rem/1.2 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.example-button span { margin-left: 12px; color: var(--mint); }

.signal-graphic { position: relative; width: min(100%, 490px); aspect-ratio: 1; justify-self: end; }
.orbit { position: absolute; display: grid; place-items: start center; border: 1px solid; border-radius: 50%; }
.orbit span { transform: translateY(-50%); padding: 4px 7px; background: var(--ink); font: .6rem/1 var(--mono); }
.orbit-one { inset: 33%; border-color: var(--mint); }
.orbit-two { inset: 17%; border-color: var(--violet); transform: rotate(-10deg); }
.orbit-two span { transform: translateY(-50%) rotate(10deg); }
.orbit-three { inset: 1%; border-color: var(--coral); transform: rotate(13deg); }
.orbit-three span { transform: translateY(-50%) rotate(-13deg); }
.signal-core { position: absolute; inset: 40%; display: grid; place-items: center; border-radius: 50%; background: var(--paper); color: var(--ink); text-align: center; font: 800 .62rem/1.2 var(--mono); text-transform: uppercase; }

.builder { padding: 96px 0 112px; border-top: 1px solid var(--line); }
.section-label { margin-bottom: 76px; color: var(--paper-muted); font: .64rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.section-label span { margin-right: 18px; color: var(--mint); }
.builder-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 9vw; align-items: start; }
.builder-heading { position: sticky; top: 28px; }
.builder-heading h2, .result-head h2 { margin-bottom: 24px; font: 900 clamp(3rem, 5.4vw, 6rem)/.9 var(--display); letter-spacing: -.06em; text-transform: uppercase; }
.builder-heading > p:last-child { max-width: 420px; color: var(--paper-muted); line-height: 1.65; }
form { display: grid; gap: 24px; }
form label > span, .time-choice legend { display: block; margin-bottom: 9px; color: var(--paper-muted); font: .61rem/1.3 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
input, select { width: 100%; height: 58px; padding: 0 15px; border: 1px solid var(--line); border-radius: 0; outline: 0; background: var(--deep); color: var(--paper); }
input:focus, select:focus { border-color: var(--mint); box-shadow: 0 0 0 2px rgb(185 255 207 / 12%); }
input::placeholder { color: #746b7e; }
.field-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 17px; }
.time-choice { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); border: 0; gap: 10px; }
.time-choice legend { grid-column: 1 / -1; }
.time-choice label { position: relative; }
.time-choice input { position: absolute; opacity: 0; pointer-events: none; }
.time-choice span { height: 52px; margin: 0; display: grid; place-items: center; border: 1px solid var(--line); background: var(--deep); color: var(--paper); cursor: pointer; }
.time-choice input:checked + span { border-color: var(--mint); background: var(--mint); color: var(--ink); }
.primary-button { min-height: 66px; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; border: 1px solid var(--coral); background: var(--coral); color: var(--deep); cursor: pointer; font-weight: 800; }
.primary-button:hover { background: var(--mint); border-color: var(--mint); }
.primary-button b { font-size: 1.5rem; }

.result { padding: 100px 0 118px; border-top: 1px solid var(--line); }
.result-head { display: flex; align-items: end; justify-content: space-between; gap: 48px; margin-bottom: 40px; }
.result-head > div { max-width: 980px; }
.result-head h2 { margin-bottom: 18px; }
.plan-meta { margin: 0; color: var(--paper-muted); font: .68rem/1 var(--mono); letter-spacing: .07em; text-transform: uppercase; }
.boundary { margin-bottom: 16px; padding: 18px 20px; border-left: 4px solid var(--mint); background: rgb(185 255 207 / 8%); color: var(--mint); font: .72rem/1.5 var(--mono); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.step-card { min-height: 460px; padding: 27px; display: flex; flex-direction: column; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .2s ease; }
.step-top { display: flex; justify-content: space-between; margin-bottom: 74px; font: .62rem/1 var(--mono); text-transform: uppercase; }
.step-number { color: var(--coral); }
.step-time { color: var(--paper-muted); }
.step-title { margin-bottom: 20px; font: 900 clamp(1.55rem, 2.4vw, 2.6rem)/.95 var(--display); letter-spacing: -.045em; text-transform: uppercase; }
.step-action { color: var(--paper-muted); font-size: .91rem; line-height: 1.65; }
.step-done { padding-top: 17px; border-top: 1px solid var(--line); color: var(--mint); font: .66rem/1.55 var(--mono); }
.step-check { margin-top: auto; padding-top: 26px; display: flex; align-items: center; gap: 11px; cursor: pointer; font: .62rem/1.3 var(--mono); letter-spacing: .04em; text-transform: uppercase; }
.step-check input { width: 20px; height: 20px; padding: 0; accent-color: var(--mint); }
.step-card.is-complete { background: rgb(185 255 207 / 7%); }
.step-card.is-complete .step-title { color: var(--mint); }
.next-move { margin-top: 16px; padding: 38px; background: var(--paper); color: var(--ink); }
.next-eyebrow { display: block; margin-bottom: 20px; color: #6a5f70; font: .62rem/1 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.next-title { display: block; margin-bottom: 12px; font: 900 clamp(2rem, 4vw, 4.4rem)/.92 var(--display); letter-spacing: -.05em; text-transform: uppercase; }
.next-detail { max-width: 850px; margin: 0; color: #5d5661; line-height: 1.6; }
.next-move[data-state="listening"] { background: var(--mint); }

footer { min-height: 112px; padding: 28px 0; display: flex; align-items: center; justify-content: space-between; gap: 22px; border-top: 1px solid var(--line); color: var(--paper-muted); font: .6rem/1.45 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
footer p { margin: 0; text-align: center; }

@media (max-width: 820px) {
  .site-header, main, footer { width: min(100% - 30px, 1240px); }
  .site-header { min-height: 68px; }
  .privacy { font-size: 0; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding: 70px 0 74px; }
  h1 { font-size: clamp(3.65rem, 17vw, 6.3rem); }
  .signal-graphic { width: min(78vw, 390px); margin: 20px auto 0; justify-self: center; }
  .builder { padding: 72px 0 84px; }
  .section-label { margin-bottom: 45px; }
  .builder-layout { grid-template-columns: 1fr; gap: 42px; }
  .builder-heading { position: static; }
  .field-grid { grid-template-columns: 1fr; }
  .result { padding: 74px 0 86px; }
  .result-head { display: block; }
  .result-head .reset-button { margin-top: 20px; }
  .steps { grid-template-columns: 1fr; }
  .step-card { min-height: auto; }
  .step-top { margin-bottom: 40px; }
  .step-check { margin-top: 34px; }
  .next-move { padding: 28px 22px; }
  footer { display: block; text-align: center; }
  footer p { margin: 10px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .step-card { transition: none; }
}