:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #5d6b7a;
  --line: #d7e0e7;
  --soft: #f3f7fa;
  --paper: #ffffff;
  --blue: #2368a2;
  --green: #2d7d64;
  --amber: #d68d1f;
  --shadow: 0 16px 40px rgb(23 33 43 / 8%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--soft);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgb(255 255 255 / 92%);
}

.nav,
.wrap {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
}

.nav {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.hero {
  padding: 56px 0 34px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 28px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.15;
}

h3 {
  margin: 0 0 6px;
  font-size: 19px;
  line-height: 1.25;
}

p {
  margin: 0 0 14px;
}

.lead {
  max-width: 680px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 19px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--blue);
  border-radius: 8px;
  padding: 0 16px;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
}

.button.secondary {
  border-color: var(--line);
  background: var(--paper);
  color: var(--ink);
}

.panel,
.tool-card,
.app-card,
.calculator {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.panel {
  padding: 20px;
}

.metric-grid,
.card-grid,
.result-grid {
  display: grid;
  gap: 14px;
}

.metric-grid {
  grid-template-columns: repeat(3, 1fr);
}

.metric {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #f8fbfd;
}

.metric strong {
  display: block;
  font-size: 24px;
}

.metric span,
.muted {
  color: var(--muted);
}

.section {
  padding: 30px 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 16px;
}

.card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tool-card,
.app-card {
  padding: 18px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tag {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 5px 8px;
  background: #f8fbfd;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.calculator {
  padding: 18px;
}

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

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

input,
select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.result-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 16px;
}

.result {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #f8fbfd;
}

.result strong {
  display: block;
  font-size: 22px;
}

.faq {
  display: grid;
  gap: 12px;
}

.faq-item {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.footer {
  margin-top: 34px;
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 780px) {
  .hero-grid,
  .card-grid,
  .metric-grid,
  .form-grid,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 38px;
  }
}