:root {
  --bg: #f5f7fb;
  --surface: #fff;
  --text: #152033;
  --muted: #68758a;
  --line: #e3e8f0;
  --accent: #2563eb;
  --hero: #102c61;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

.wrap {
  max-width: 1180px;
  margin: auto;
  padding: 0 22px;
}

header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 5;
}

.nav {
  max-width: 1180px;
  margin: auto;
  padding: 15px 22px;
  display: flex;
  align-items: center;
}

.logo {
  font-size: 21px;
  font-weight: 900;
}

.logo span {
  color: var(--accent);
}

nav {
  margin-left: auto;
  display: flex;
  gap: 22px;
  font-weight: 700;
  color: var(--muted);
}

.hero {
  background: linear-gradient(135deg, #0e244c, #17478f);
  color: #fff;
}

.hero-grid {
  padding-top: 45px;
  padding-bottom: 48px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
}

.hero h1 {
  font-size: 48px;
  line-height: 1;
  margin: 12px 0;
}

.hero p {
  font-size: 18px;
  line-height: 1.55;
  color: #dbe7fb;
}

.hero small {
  letter-spacing: 1.5px;
}

.calc {
  background: #fff;
  color: var(--text);
  padding: 20px;
  border-radius: 18px;
}

.calc h2 {
  margin-top: 0;
}

.fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.fields input,
.fields select,
.toolbar input {
  width: 100%;
  padding: 12px;
  border: 1px solid #d7deea;
  border-radius: 10px;
  background: #fff;
}

.fields input {
  grid-column: 1 / -1;
}

.result {
  margin-top: 12px;
  padding: 15px;
  border-radius: 12px;
  background: #edf4ff;
  font-size: 25px;
  font-weight: 800;
}

.result small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}

.muted {
  color: var(--muted);
}

section {
  margin: 36px 0;
}

section h2 {
  font-size: 25px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.card,
article,
.tablebox,
.chartbox {
  background: var(--surface);
  border: 1px solid #2563eb;
  border-radius: 15px;
}

.card {
  padding: 17px;
}

.card .rate {
  font-size: 24px;
  font-weight: 850;
  margin: 10px 0 3px;
}

.mini {
  font-size: 12px;
  color: var(--muted);
}

.tablebox {
  overflow: hidden;
}

.toolbar {
  display: flex;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
  align-items: center;
}

.toolbar input {
  max-width: 340px;
}

#status {
  color: var(--muted);
  font-size: 13px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

th {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--muted);
}

tr:last-child td {
  border-bottom: 0;
}

.chartbox {
  padding: 18px;
}

.chart {
  height: 250px;
  display: flex;
  align-items: end;
  gap: 4px;
}

.bar {
  flex: 1;
  min-width: 3px;
  background: #26EB2D;
  border-radius: 4px 4px 1px 1px;
}

.between {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
  margin-top: 8px;
}

.articles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.articles article {
  padding: 20px;
}

.articles p {
  color: var(--muted);
  line-height: 1.5;
}

footer {
  text-align: center;
  padding: 28px 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

footer a {
  color: var(--accent);
}

@media (max-width: 850px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

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

  .articles {
    grid-template-columns: 1fr;
  }

  nav {
    display: none;
  }
}

@media (max-width: 520px) {
  .cards {
    grid-template-columns: 1fr;
  }

  .fields {
    grid-template-columns: 1fr;
  }

  .wrap {
    padding: 0 15px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .toolbar {
    flex-wrap: wrap;
  }
}