:root {
  --bg: #f5f6f2;
  --ink: #1c2520;
  --muted: #66716b;
  --line: #d9ded6;
  --panel: #ffffff;
  --blue: #255f85;
  --green: #2f7357;
  --red: #a94442;
  --amber: #a46a22;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: rgba(245, 246, 242, 0.94);
  backdrop-filter: blur(14px);
}

.topbar h1,
.section h2 {
  margin: 0;
  letter-spacing: 0;
}

.topbar h1 {
  font-size: clamp(24px, 3vw, 42px);
  line-height: 1.05;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.nav a {
  min-height: 36px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: #34413a;
  font-size: 14px;
  font-weight: 700;
}

main {
  padding: 28px clamp(18px, 4vw, 56px) 56px;
}

.summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.module,
.metric,
.result,
.decision {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.module {
  min-height: 168px;
  padding: 22px;
}

.module__label {
  display: inline-block;
  margin-bottom: 28px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.module strong {
  display: block;
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.15;
}

.module p,
.section__head p,
.decision p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.section__head {
  max-width: 720px;
  margin-bottom: 18px;
}

.section h2 {
  font-size: 26px;
  line-height: 1.15;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.metric {
  min-height: 112px;
  padding: 18px;
}

.metric span,
.result span,
.decision span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.metric strong {
  font-size: 28px;
}

.split {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(300px, 1.1fr) minmax(220px, 0.7fr);
  gap: 18px;
  align-items: start;
}

.calculator {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

label {
  display: grid;
  gap: 7px;
  color: #354139;
  font-size: 13px;
  font-weight: 800;
}

input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 11px;
  color: var(--ink);
  background: var(--panel);
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(37, 95, 133, 0.24);
  border-color: var(--blue);
}

.result,
.decision {
  min-height: 184px;
  padding: 20px;
}

.result strong,
.decision strong {
  display: block;
  margin-bottom: 18px;
  font-size: 26px;
}

.decision.is-good strong {
  color: var(--green);
}

.decision.is-risk strong {
  color: var(--amber);
}

.decision.is-bad strong {
  color: var(--red);
}

.timeline {
  display: grid;
  gap: 10px;
}

.timeline div {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 50px;
  border-top: 1px solid var(--line);
  color: #303b35;
  font-weight: 700;
}

.timeline span {
  display: inline-grid;
  place-items: center;
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--ink);
  color: white;
  font-size: 13px;
}

@media (max-width: 980px) {
  .topbar,
  .split {
    display: block;
  }

  .nav {
    justify-content: flex-start;
    margin-top: 14px;
  }

  .summary,
  .metrics,
  .calculator {
    grid-template-columns: 1fr 1fr;
  }

  .calculator,
  .result,
  .decision {
    margin-top: 16px;
  }
}

@media (max-width: 640px) {
  .summary,
  .metrics,
  .calculator {
    grid-template-columns: 1fr;
  }

  .nav a {
    flex: 1 1 auto;
    text-align: center;
  }
}