:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #647089;
  --line: #dfe5ee;
  --accent: #1677ff;
  --accent-strong: #0d4fcc;
  --good: #0f8f62;
  --shadow: 0 18px 54px rgba(29, 43, 74, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

.hero {
  max-width: 840px;
  margin-bottom: 32px;
}

.hero.compact {
  margin-bottom: 24px;
}

.eyebrow {
  color: var(--accent-strong);
  font-weight: 700;
  margin-bottom: 12px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 16px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 0.96;
}

h2 {
  margin-bottom: 10px;
  font-size: 24px;
}

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

.hero p {
  max-width: 760px;
  font-size: 19px;
}

.tool-shell {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 20px;
  align-items: start;
  margin-bottom: 28px;
}

.tool-shell > *,
.content-grid > * {
  min-width: 0;
}

.panel,
.content-grid article,
.links-section,
.faq,
.tool-redirect {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel {
  padding: 24px;
}

.panel-heading {
  margin-bottom: 18px;
}

.panel-heading p {
  margin-bottom: 0;
  font-size: 14px;
}

label {
  display: grid;
  gap: 7px;
  position: relative;
  margin-bottom: 16px;
  color: #34405a;
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 44px;
  border: 1px solid #cdd6e3;
  border-radius: 8px;
  background: #fbfcff;
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  padding: 10px 12px;
}

.field-prefix + input {
  padding-left: 28px;
}

.field-prefix {
  position: absolute;
  left: 12px;
  bottom: 10px;
  color: var(--muted);
}

input[type="range"] {
  min-height: auto;
  padding: 0;
  accent-color: var(--accent);
}

output {
  color: var(--accent-strong);
  font-weight: 800;
}

.inline-note {
  margin: -4px 0 16px;
  font-size: 13px;
  color: var(--muted);
}

.summary-card {
  display: grid;
  gap: 4px;
  margin-bottom: 18px;
  padding: 18px;
  border-radius: 8px;
  background: #eaf3ff;
  border: 1px solid #c9defc;
}

.summary-card span,
.summary-card small {
  color: #4c5c78;
}

.summary-card strong {
  font-size: 30px;
  color: var(--good);
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th,
td {
  padding: 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: #4b5874;
  font-size: 13px;
  text-transform: uppercase;
}

td small {
  display: block;
  max-width: 340px;
  margin-top: 4px;
  color: var(--muted);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.content-grid article,
.links-section,
.faq,
.tool-redirect {
  padding: 24px;
}

.link-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.source-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

a {
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}

.link-grid a,
.source-list a,
.primary-link,
.back-link {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  border: 1px solid #cbd9ee;
  border-radius: 8px;
  background: #f7fbff;
  padding: 8px 12px;
}

.primary-link {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.back-link {
  margin-bottom: 16px;
}

.links-section,
.faq,
.tool-redirect {
  margin-bottom: 28px;
}

details {
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

details p {
  margin: 10px 0 0;
}

.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: -36px auto 0;
  padding: 0 0 44px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer p {
  margin-bottom: 6px;
}

@media (max-width: 860px) {
  main {
    width: min(100% - 20px, 680px);
    padding-top: 28px;
  }

  .site-footer {
    width: min(100% - 20px, 680px);
    margin-top: -44px;
  }

  .tool-shell,
  .content-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 44px;
  }
}