:root {
  color-scheme: light;
  --ink: #12131a;
  --muted: #626977;
  --line: #dbe0e8;
  --paper: #f7f9fc;
  --panel: #ffffff;
  --accent: #00c8d7;
  --accent-dark: #007b86;
  --hot: #ff3b5f;
  --hot-dark: #c91f44;
  --soft: #eefbfc;
  --soft-hot: #fff1f4;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
}

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

.site-header {
  align-items: center;
  background: rgba(247, 249, 252, 0.94);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 6vw;
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-weight: 800;
  gap: 10px;
}

.brand-mark {
  align-items: center;
  background: linear-gradient(135deg, var(--accent) 0%, var(--hot) 100%);
  border-radius: 8px;
  color: #fff;
  display: inline-flex;
  height: 34px;
  justify-content: center;
  width: 34px;
}

.nav {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 15px;
}

.hero {
  align-items: start;
  display: grid;
  gap: 36px;
  grid-template-columns: minmax(320px, 0.62fr) minmax(560px, 1fr);
  min-height: auto;
  padding: 52px 6vw 70px;
}

.hero-copy {
  max-width: 560px;
  padding-top: 26px;
}

.eyebrow {
  color: var(--hot-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 12px;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(38px, 4.6vw, 58px);
  line-height: 1.02;
  margin-bottom: 20px;
  max-width: 560px;
}

h2 {
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.05;
  margin-bottom: 16px;
}

h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.hero-text,
.section-heading p,
.content p,
.tool-list p,
.faq-section p,
.note {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.65;
}

.hero-text {
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-weight: 800;
  min-height: 48px;
  padding: 0 20px;
}

.primary {
  background: #12131a;
  color: #fff;
}

.primary:hover {
  background: #232532;
}

.secondary {
  border: 1px solid var(--line);
  color: var(--ink);
}

.tool-panel,
.results,
.tool-list article,
details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 22px 70px rgba(18, 19, 26, 0.08);
}

.tools-section,
.content-section,
.embed-section,
.faq-section {
  padding: 88px 6vw;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.tool-panel {
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1fr);
  padding: 22px;
}

.calculator {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  color: var(--ink);
  display: grid;
  font-size: 14px;
  font-weight: 800;
  gap: 8px;
}

.input-wrap {
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  min-height: 54px;
  padding: 0 14px;
}

.input-wrap span {
  color: var(--muted);
  font-weight: 700;
}

input {
  border: 0;
  color: var(--ink);
  flex: 1;
  font: inherit;
  font-size: 17px;
  min-width: 0;
  outline: 0;
  padding: 0 8px;
}

select {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--ink);
  flex: 1;
  font: inherit;
  font-size: 16px;
  min-width: 0;
  outline: 0;
  padding: 0 8px;
}

.results {
  align-self: start;
  border: 0;
  box-shadow: none;
  padding: 24px;
}

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

.result-card {
  background: var(--soft);
  border-radius: 8px;
  display: grid;
  gap: 8px;
  min-height: 104px;
  padding: 18px;
}

.result-card span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.result-card strong {
  color: #111827;
  font-size: 24px;
}

.result-card.featured {
  background: linear-gradient(135deg, #12131a 0%, #182a31 58%, #12383e 100%);
  border: 1px solid rgba(0, 200, 215, 0.24);
}

.result-card.featured span,
.result-card.featured strong {
  color: #fff;
}

.result-card.featured strong {
  font-size: 42px;
}

.result-strip {
  align-items: center;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 10px 16px;
  grid-template-columns: 1fr auto;
  margin-top: 18px;
  padding-top: 18px;
}

.result-strip span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.result-strip strong {
  color: var(--hot-dark);
  font-size: 22px;
}

.insight {
  background: linear-gradient(90deg, var(--soft) 0%, var(--soft-hot) 100%);
  border: 1px solid #d9eef1;
  border-radius: 8px;
  color: #26323f;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  margin-top: 16px;
  padding: 14px 16px;
}

.note {
  font-size: 14px;
  margin: 18px 0 0;
}

.tool-list {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tool-list article {
  box-shadow: none;
  padding: 22px;
}

.content {
  max-width: 850px;
}

.formula-box,
.embed-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 12px;
  margin-top: 20px;
  padding: 20px;
}

.formula-box span {
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
}

.embed-box {
  align-items: center;
  grid-template-columns: minmax(0, 1fr) auto;
  max-width: 1040px;
}

.embed-box code {
  background: var(--soft);
  border-radius: 8px;
  color: var(--ink);
  display: block;
  font-size: 14px;
  line-height: 1.5;
  overflow-wrap: anywhere;
  padding: 14px;
}

.copy-status {
  color: var(--hot-dark);
  font-size: 14px;
  font-weight: 800;
  margin: 12px 0 0;
}

details {
  box-shadow: none;
  margin-bottom: 14px;
  padding: 20px 22px;
}

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

details p {
  margin: 14px 0 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  gap: 16px;
  justify-content: space-between;
  padding: 28px 6vw;
}

.site-footer a {
  color: var(--hot-dark);
  font-weight: 800;
  margin-left: 14px;
}

.legal-page {
  padding: 72px 6vw 96px;
}

@media (max-width: 900px) {
  .hero,
  .tool-list {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding-top: 0;
  }

  .hero {
    padding-top: 48px;
  }

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

@media (max-width: 640px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .nav {
    gap: 16px;
  }

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

  .result-strip {
    grid-template-columns: 1fr;
  }

  .embed-box {
    grid-template-columns: 1fr;
  }
}