:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-soft: #eef4ff;
  --text: #0f172a;
  --muted: #475569;
  --line: #dbe3ef;
  --primary: #0f766e;
  --primary-dark: #115e59;
  --secondary: #2563eb;
  --warning-bg: #fff7ed;
  --warning-line: #fdba74;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --radius: 24px;
  --radius-sm: 16px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, #f8fbff 100%);
  color: var(--text);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

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

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(248, 250, 252, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(219, 227, 239, 0.8);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand strong,
.legal-brand strong {
  display: block;
  font-size: 1rem;
}

.brand small,
.legal-brand small {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
}

.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, #0f766e, #2563eb);
  color: #fff;
  font-weight: 800;
  flex-shrink: 0;
}

.nav,
.footer-nav,
.legal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.nav a,
.footer-nav a,
.legal-nav a {
  color: var(--muted);
  font-weight: 700;
}

.nav a:hover,
.footer-nav a:hover,
.legal-nav a:hover,
.text-link:hover {
  color: var(--text);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  flex-shrink: 0;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hero {
  padding: 72px 0 24px;
}

.hero-grid,
.calculator-grid,
.footer-grid,
.legal-layout,
.trust-grid {
  display: grid;
  gap: 28px;
}

.hero-grid {
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--secondary);
  font-weight: 800;
  font-size: 0.76rem;
}

h1,
h2,
h3 {
  margin: 0 0 12px;
  line-height: 1.12;
}

h1 {
  font-size: clamp(2.3rem, 4vw, 4.4rem);
  max-width: 13ch;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.8rem);
}

h3 {
  font-size: 1.15rem;
}

.lead {
  font-size: 1.1rem;
  max-width: 64ch;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 20px;
}

.hero-points {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.hero-visual {
  padding: 18px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  font-weight: 700;
  font-size: 0.92rem;
}

.section {
  padding: 34px 0;
}

.alt {
  background: rgba(255, 255, 255, 0.54);
  border-top: 1px solid rgba(219, 227, 239, 0.7);
  border-bottom: 1px solid rgba(219, 227, 239, 0.7);
}

.section-head {
  margin-bottom: 18px;
}

.section-copy {
  max-width: 70ch;
  margin: 0;
  color: var(--muted);
}

.card,
.notice-card,
.legal-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card,
.legal-card {
  padding: 24px;
}

.notice-card {
  padding: 18px 20px;
}

.notice-card.warning {
  background: var(--warning-bg);
  border-color: var(--warning-line);
}

.calculator-grid {
  grid-template-columns: minmax(320px, 1.05fr) minmax(280px, 0.95fr);
  align-items: start;
}

.card-head p {
  color: var(--muted);
  margin-top: 0;
}

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

.form-grid label {
  display: grid;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
}

.form-grid input,
.form-grid select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.form-grid input:focus,
.form-grid select:focus,
.menu-toggle:focus-visible,
.button:focus-visible,
.text-link:focus-visible,
.nav a:focus-visible,
.footer-nav a:focus-visible {
  outline: 2px solid rgba(37, 99, 235, 0.2);
  outline-offset: 2px;
  border-color: rgba(37, 99, 235, 0.55);
}

.field-note {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 500;
}

.checkbox {
  grid-column: span 2;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
  font-weight: 600;
  color: var(--muted);
}

.checkbox input {
  width: 20px;
  height: 20px;
  margin-top: 2px;
}

.hidden {
  display: none !important;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 16px;
  font-weight: 800;
  border: 1px solid transparent;
  cursor: pointer;
}

.button.primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
}

.button.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--text);
}

.button.full {
  width: 100%;
  grid-column: span 2;
}

.results-stack,
.faq-list,
.method-steps {
  display: grid;
  gap: 16px;
}

.result-card .label,
.stat-card span {
  margin: 0 0 8px;
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.big-number {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1;
  font-weight: 900;
  margin-bottom: 12px;
}

.accent-a {
  background: linear-gradient(180deg, #effcf7 0%, #ffffff 100%);
}

.accent-b {
  background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
}

.accent-c {
  background: linear-gradient(180deg, #fff7ed 0%, #ffffff 100%);
}

.feature-grid,
.stats-grid,
.source-grid {
  display: grid;
  gap: 18px;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-grid.four-up {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

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

.feature-card p,
.stat-card p,
.faq-item p,
.site-footer p,
.legal-card p,
.legal-card li,
.legal-card dd,
.legal-intro,
.result-card p,
.source-card p,
.method-card p,
.author-card p {
  margin: 0;
  color: var(--muted);
}

.author-card,
.method-card,
.source-card,
.feature-card,
.stat-card {
  height: 100%;
}

.check-list {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  margin-top: 16px;
  color: var(--secondary);
  font-weight: 800;
}

.method-steps strong {
  display: block;
  margin-bottom: 6px;
}

.stat-card strong {
  display: block;
  font-size: 2rem;
  margin-bottom: 4px;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  font-weight: 800;
  padding-right: 22px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin-top: 12px;
}

.site-footer {
  padding: 38px 0 54px;
}

.footer-grid {
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
}

.legal-hero {
  padding: 56px 0 16px;
}

.legal-layout {
  grid-template-columns: 0.9fr 1.1fr;
  align-items: start;
}

.legal-sticky {
  position: sticky;
  top: 106px;
}

.legal-card h1 {
  max-width: none;
  font-size: clamp(2rem, 3.2vw, 3rem);
}

.legal-card h2 {
  font-size: 1.35rem;
  margin-top: 28px;
}

.legal-card h3 {
  margin-top: 16px;
}

.legal-card ul,
.legal-card ol,
.legal-card dl {
  margin: 12px 0 0;
  padding-left: 20px;
}

.legal-card dl {
  padding-left: 0;
}

.legal-card dt {
  font-weight: 800;
  margin-top: 10px;
}

.legal-card dd {
  margin-left: 0;
}

.legal-note {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}

@media (max-width: 1100px) {
  .feature-grid.four-up {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  body.menu-open {
    overflow: hidden;
  }

  .hero-grid,
  .calculator-grid,
  .feature-grid,
  .feature-grid.four-up,
  .stats-grid,
  .footer-grid,
  .legal-layout,
  .trust-grid,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .nav-wrap {
    position: relative;
    align-items: center;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .menu-open .menu-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-open .menu-toggle span:nth-child(2) {
    opacity: 0;
  }

  .menu-open .menu-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    left: 0;
    display: none;
    padding: 14px;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    z-index: 50;
  }

  .menu-open .nav {
    display: flex;
  }

  .nav a {
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(37, 99, 235, 0.06);
  }

  .legal-sticky {
    position: static;
  }
}

@media (max-width: 720px) {
  .hero {
    padding-top: 40px;
  }

  .brand {
    gap: 10px;
  }

  .brand span:last-child strong {
    display: block;
    font-size: 1rem;
  }

  .brand span:last-child small {
    display: block;
    font-size: 0.72rem;
  }

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

  .checkbox,
  .button.full {
    grid-column: span 1;
  }

  .container {
    width: min(var(--container), calc(100% - 20px));
  }

  .card,
  .notice-card,
  .legal-card {
    border-radius: 20px;
  }
}

.nav a {
  position: relative;
  transition: color 0.2s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.nav a:hover,
.nav a.active,
.nav a[aria-current="page"],
.nav a[aria-current="location"] {
  color: var(--secondary);
}

.nav a:hover::after,
.nav a.active::after,
.nav a[aria-current="page"]::after,
.nav a[aria-current="location"]::after {
  transform: scaleX(1);
}

@media (max-width: 960px) {
  .nav a::after {
    display: none;
  }

  .nav a:hover,
  .nav a.active,
  .nav a[aria-current="page"],
  .nav a[aria-current="location"] {
    background: rgba(37, 99, 235, 0.12);
    color: var(--secondary);
  }
}