:root {
  --bg: #071019;
  --panel: #0d1924;
  --line: rgba(161, 209, 220, 0.18);
  --text: #eef7fa;
  --muted: #a9bac4;
  --cyan: #59d1e5;
  --green: #72df94;
  --orange: #f6a14d;
  --red: #ff8b82;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background:
    radial-gradient(circle at 75% 0, rgba(114, 223, 148, 0.1), transparent 28%),
    linear-gradient(180deg, #071019, #04080c);
  color: var(--text);
  font-family: Poppins, sans-serif;
  line-height: 1.6;
}
a {
  color: inherit;
}
.skip-link {
  position: fixed;
  top: -70px;
  left: 14px;
  background: #fff;
  color: #111;
  padding: 12px;
  z-index: 20;
}
.skip-link:focus {
  top: 10px;
}
header {
  height: 78px;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 16, 25, 0.9);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
}
.brand span {
  display: grid;
}
.brand strong {
  font:
    700 1.1rem Orbitron,
    sans-serif;
  letter-spacing: 0.1em;
}
.brand small {
  color: var(--muted);
}
nav {
  display: flex;
  align-items: center;
  gap: 20px;
}
nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
}
.button {
  display: inline-flex;
  min-height: 50px;
  padding: 0 22px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--green), #25a85a);
  color: #04120a;
  font:
    700 0.92rem Poppins,
    sans-serif;
  text-decoration: none;
  cursor: pointer;
}
.button.small {
  min-height: 44px;
  padding: 0 17px;
}
.button.quiet {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line);
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
}
.hero {
  max-width: 1180px;
  margin: auto;
  padding: 110px 22px 85px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 70px;
  align-items: center;
}
.eyebrow {
  margin: 0 0 13px;
  color: var(--green);
  font:
    600 0.74rem Orbitron,
    sans-serif;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero h1,
.section-heading h2,
.architecture h2 {
  margin: 0;
  font-family: Orbitron, sans-serif;
  line-height: 1.08;
}
.hero h1 {
  font-size: clamp(2.6rem, 5vw, 4.8rem);
  letter-spacing: -0.045em;
}
.hero h1 span {
  color: var(--green);
}
.hero p:not(.eyebrow) {
  color: #cad8de;
  font-size: 1.05rem;
  max-width: 650px;
}
.hero-actions,
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 25px 0;
}
.hero ul {
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  list-style: none;
  color: var(--muted);
  font-size: 0.84rem;
}
.hero li:before {
  content: "✓";
  color: var(--green);
  margin-right: 7px;
}
.pilot-loop {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 340px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.025);
}
.pilot-loop div {
  display: grid;
  place-items: center;
  gap: 9px;
}
.pilot-loop b {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(114, 223, 148, 0.4);
  border-radius: 50%;
  font:
    700 1rem Orbitron,
    sans-serif;
  color: var(--green);
}
.pilot-loop span {
  font-size: 0.72rem;
  color: var(--muted);
}
.pilot-loop i {
  height: 1px;
  min-width: 22px;
  background: linear-gradient(90deg, var(--green), transparent);
}
.modeler {
  padding: 90px max(20px, calc((100vw - 1120px) / 2));
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}
.section-heading {
  max-width: 790px;
  margin-bottom: 40px;
}
.section-heading h2,
.architecture h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}
.section-heading > p:last-child,
.architecture p {
  color: var(--muted);
}
form {
  display: grid;
  gap: 20px;
}
fieldset {
  margin: 0;
  padding: 27px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel);
}
legend {
  padding: 0 10px;
  font:
    700 1rem Orbitron,
    sans-serif;
}
legend span {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-right: 9px;
  border-radius: 50%;
  background: rgba(114, 223, 148, 0.12);
  color: var(--green);
}
.fields {
  display: grid;
  gap: 16px;
}
.fields.three {
  grid-template-columns: repeat(3, 1fr);
}
.fields.two {
  grid-template-columns: 1fr 1fr;
}
label {
  display: grid;
  gap: 8px;
  font-size: 0.87rem;
  font-weight: 600;
}
input,
select {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #08131c;
  color: var(--text);
  padding: 0 14px;
  font:
    500 1rem Poppins,
    sans-serif;
}
input[type="range"] {
  padding: 0;
  accent-color: var(--green);
}
output {
  font:
    700 1rem Orbitron,
    sans-serif;
  color: var(--green);
}
.hint {
  color: var(--muted);
  font-size: 0.84rem;
}
.checks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11px;
}
.checks label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}
.checks input {
  width: 20px;
  min-height: 20px;
  accent-color: var(--green);
}
.error {
  padding: 14px;
  border: 1px solid rgba(255, 139, 130, 0.45);
  border-radius: 12px;
  background: rgba(255, 139, 130, 0.08);
  color: #ffd5d2;
}
.results {
  margin-top: 38px;
  padding: 30px;
  border: 1px solid rgba(114, 223, 148, 0.28);
  border-radius: 25px;
  background: linear-gradient(160deg, #102118, #09141a);
}
.result-top {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}
.result-top h2 {
  margin: 0;
  font:
    700 clamp(1.8rem, 3vw, 2.6rem) Orbitron,
    sans-serif;
}
.status {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.76rem;
}
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 26px 0;
}
.metrics article,
.result-grid article {
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.025);
}
.metrics span,
.metrics small {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
}
.metrics strong {
  display: block;
  margin: 7px 0;
  font:
    700 1.7rem Orbitron,
    sans-serif;
  color: var(--green);
}
.assumptions {
  margin: 0 0 18px;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.025);
}
.assumptions-heading {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: baseline;
}
.assumptions h3,
.assumptions p {
  margin: 0;
}
.assumptions h3 {
  font:
    700 1rem Orbitron,
    sans-serif;
}
.assumptions-heading p,
.assumptions > p,
.assumptions dt {
  color: var(--muted);
  font-size: 0.76rem;
}
.assumptions dl {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin: 18px 0;
}
.assumptions dt,
.assumptions dd {
  margin: 0;
}
.assumptions dd {
  margin-top: 4px;
  font-weight: 600;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 13px;
}
.result-grid h3 {
  margin-top: 0;
  font:
    700 1rem Orbitron,
    sans-serif;
}
.result-grid ul,
.result-grid ol {
  padding-left: 20px;
}
.result-grid li + li {
  margin-top: 8px;
}
.notice {
  margin-top: 15px;
  padding: 15px;
  border: 1px solid rgba(246, 161, 77, 0.24);
  border-radius: 11px;
  background: rgba(246, 161, 77, 0.07);
  color: #ead8c4;
}
.architecture {
  max-width: 1120px;
  margin: 85px auto;
  padding: 30px;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 30px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
}
.architecture-links {
  display: grid;
  gap: 10px;
}
footer {
  padding: 30px max(20px, calc((100vw - 1120px) / 2));
  min-height: 120px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  color: var(--muted);
}
footer > div {
  display: grid;
}
footer strong {
  color: var(--text);
}
[hidden] {
  display: none !important;
}
@media (max-width: 850px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .fields.three,
  .result-grid,
  .assumptions dl {
    grid-template-columns: 1fr;
  }
  .metrics {
    grid-template-columns: 1fr 1fr;
  }
  .architecture {
    margin-inline: 18px;
    grid-template-columns: 1fr;
  }
  header nav > a:not(.button) {
    display: none;
  }
}
@media (max-width: 520px) {
  header {
    height: 68px;
    padding: 0 13px;
  }
  .brand img {
    width: 44px;
    height: 44px;
  }
  .brand small {
    display: none;
  }
  .hero {
    padding: 60px 16px;
    gap: 35px;
  }
  .hero h1 {
    font-size: 2.35rem;
  }
  .pilot-loop {
    min-height: 230px;
    padding: 16px;
  }
  .pilot-loop b {
    width: 45px;
    height: 45px;
  }
  .pilot-loop i {
    min-width: 8px;
  }
  .modeler {
    padding: 65px 15px;
  }
  .fields.two,
  .checks,
  .metrics {
    grid-template-columns: 1fr;
  }
  .results {
    padding: 19px;
  }
  .result-top,
  .assumptions-heading,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }
  .status {
    white-space: nowrap;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
@media print {
  body {
    background: #fff;
    color: #111;
  }
  header,
  .hero,
  form,
  .architecture,
  footer,
  .result-actions,
  .section-heading {
    display: none !important;
  }
  .modeler {
    padding: 0;
    border: 0;
  }
  .results {
    background: #fff;
    border: 0;
    padding: 0;
  }
  .results[hidden],
  body:not(.scenario-ready) .results {
    display: none !important;
  }
  .metrics {
    grid-template-columns: 1fr 1fr;
  }
  .result-grid {
    grid-template-columns: 1fr;
  }
  .metrics article,
  .result-grid article,
  .assumptions {
    break-inside: avoid;
    background: #fff;
    border-color: #bbb;
  }
  .metrics span,
  .metrics small,
  .assumptions-heading p,
  .assumptions > p,
  .assumptions dt {
    color: #333;
  }
  .metrics strong,
  .eyebrow {
    color: #165a2b;
  }
  .status,
  .notice {
    color: #222;
    background: #fff;
    border-color: #bbb;
  }
}