:root {
  --ink: #11120f;
  --paper: #f5f4ef;
  --cyan: #1de2c4;
  --coral: #ff654f;
  --line: #c9c9c1;
  --muted: #64665f;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Arial, Helvetica, sans-serif; letter-spacing: 0; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid #087e70; outline-offset: 3px; }
main { overflow-x: clip; width: 100%; max-width: 100%; }
nav { position: sticky; top: 0; z-index: 5; min-height: 72px; border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; padding: 12px clamp(20px, 5vw, 72px); gap: 20px; background: rgba(245, 244, 239, .96); }
nav div { display: flex; gap: 8px; }
.brand { color: inherit; text-decoration: none; font-weight: 800; }
.brand span { display: inline-grid; place-items: center; width: 34px; height: 34px; background: var(--ink); color: white; margin-right: 9px; }
button { border: 0; min-height: 42px; padding: 10px 15px; font-weight: 700; }
.dark { background: var(--ink); color: white; }
.quiet { background: transparent; color: var(--ink); }
.outline { background: transparent; border: 1px solid var(--ink); color: var(--ink); }
.primary { background: var(--cyan); color: var(--ink); width: 100%; font-size: 16px; }
header { padding: clamp(58px, 8vw, 108px) clamp(20px, 7vw, 108px) 60px; border-bottom: 1px solid var(--line); }
.kicker, .eyebrow { text-transform: uppercase; font-size: 12px; font-weight: 800; letter-spacing: 1.2px; margin: 0 0 12px; }
h1 { font-size: clamp(48px, 8vw, 112px); line-height: .88; max-width: 1100px; margin: 0 0 30px; letter-spacing: 0; }
.lede { font-size: clamp(18px, 2.1vw, 27px); line-height: 1.3; max-width: 900px; }
.trust { max-width: 850px; border-left: 5px solid var(--coral); padding: 12px 16px; background: #fff; }
.workbench { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(340px, .82fr); border-bottom: 1px solid var(--line); }
.inputs, .result { padding: clamp(24px, 4vw, 58px); }
.inputs { border-right: 1px solid var(--line); }
.panel-title, .score-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 28px; }
h2 { font-size: clamp(28px, 3vw, 44px); margin: 0; line-height: 1; }
.platforms { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
label { display: block; font-size: 13px; font-weight: 800; margin-bottom: 18px; }
input:not([type=range]), textarea { display: block; width: 100%; margin-top: 8px; border: 1px solid var(--line); background: #fff; padding: 13px; color: var(--ink); border-radius: 0; }
textarea { min-height: 78px; resize: vertical; line-height: 1.4; }
.sliders { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 22px; }
.sliders label span { display: flex; justify-content: space-between; }
.sliders input { width: 100%; accent-color: #087e70; }
.scenario { display: grid; grid-template-columns: 1fr auto auto auto; gap: 8px; align-items: end; }
.scenario input { margin: 0; }
.result { background: #151713; color: white; }
.score-head strong { font-size: 78px; line-height: .8; color: var(--cyan); }
.result .eyebrow { color: #aeb4ad; }
.meter { height: 12px; background: #363a35; margin: 12px 0 26px; }
.meter i { display: block; height: 100%; width: 64%; background: var(--cyan); transition: width .25s ease; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid #41453f; }
.metrics div { padding: 16px; border-right: 1px solid #41453f; }
.metrics div:last-child { border: 0; }
.metrics span { display: block; color: #aeb4ad; font-size: 11px; text-transform: uppercase; margin-bottom: 8px; }
.metrics b { font-size: 22px; }
.next { margin: 28px 0; padding: 24px; background: var(--cyan); color: var(--ink); }
.next .eyebrow { color: var(--ink); }
.next h3 { font-size: 25px; line-height: 1.1; margin: 0 0 10px; }
.next p:last-child { margin-bottom: 0; line-height: 1.4; }
.ledger { border-top: 1px solid #41453f; padding-top: 22px; }
.ledger p:last-child { color: #d7dbd5; line-height: 1.5; }
#status { min-height: 20px; color: var(--cyan); }
.model { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; padding: clamp(68px, 10vw, 140px) clamp(20px, 7vw, 108px); background: white; }
.formula { border-top: 5px solid var(--coral); padding-top: 22px; }
.formula span { display: block; color: var(--muted); font-size: 13px; }
.formula b { display: block; font-size: 21px; line-height: 1.4; margin: 10px 0; }
.formula p { line-height: 1.6; color: var(--muted); }
footer { padding: 24px clamp(20px, 5vw, 72px); display: flex; justify-content: space-between; align-items: center; gap: 20px; border-top: 1px solid var(--line); }
@media (max-width: 850px) {
  nav { align-items: flex-start; }
  .brand { max-width: 180px; }
  .workbench { grid-template-columns: 1fr; }
  .inputs { border-right: 0; border-bottom: 1px solid var(--line); }
  .model { grid-template-columns: 1fr; gap: 30px; }
  .platforms, .sliders { grid-template-columns: 1fr; }
  .scenario { grid-template-columns: 1fr 1fr; }
  .metrics { grid-template-columns: 1fr; }
  .metrics div { border-right: 0; border-bottom: 1px solid #41453f; }
  footer { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}