:root {
  --navy-950: #06131f;
  --navy-900: #071827;
  --navy-800: #0c2235;
  --blue-500: #16a7ff;
  --blue-100: #dff4ff;
  --green-500: #30d68a;
  --green-100: #ddf9ea;
  --gray-950: #121820;
  --gray-700: #495666;
  --gray-500: #6d7887;
  --gray-200: #dfe6ee;
  --gray-100: #f2f5f8;
  --white: #ffffff;
  --shadow: 0 20px 55px rgba(6, 19, 31, 0.12);
  --radius: 8px;
  --max-width: 1120px;
  --header-height: 74px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

[id] {
  scroll-margin-top: calc(var(--header-height) + 18px);
}

body {
  margin: 0;
  color: var(--gray-950);
  background: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

body.nav-open {
  overflow: hidden;
}

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

.section-shell {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  z-index: 50;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(20px, calc((100vw - var(--max-width)) / 2));
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(6, 19, 31, 0.82);
  color: var(--white);
  backdrop-filter: blur(14px);
}

.site-header.is-scrolled {
  border-color: rgba(6, 19, 31, 0.12);
  background: rgba(255, 255, 255, 0.95);
  color: var(--gray-950);
  box-shadow: 0 12px 30px rgba(6, 19, 31, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(48, 214, 138, 0.45);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(22, 167, 255, 0.18), rgba(48, 214, 138, 0.18));
  color: var(--green-500);
  font-size: 0.72rem;
}

.brand-name {
  font-size: 1.03rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.94rem;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--green-500);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  background: transparent;
  color: currentColor;
  cursor: pointer;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 99px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-height) + 76px) 0 88px;
  color: var(--white);
  background: var(--navy-950);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    radial-gradient(circle at 74% 26%, rgba(22, 167, 255, 0.28), transparent 28%),
    radial-gradient(circle at 84% 72%, rgba(48, 214, 138, 0.15), transparent 24%),
    linear-gradient(90deg, rgba(6, 19, 31, 0.96), rgba(6, 19, 31, 0.68));
  background-size: 42px 42px, 42px 42px, auto, auto, auto;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  gap: 58px;
  align-items: center;
}

.brand-hero .hero-grid {
  grid-template-columns: minmax(0, 1fr) minmax(300px, 390px);
  gap: 44px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green-500);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.hero h1,
.legal-hero h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6.5rem);
  line-height: 0.96;
}

.brand-hero h1 {
  max-width: 100%;
  font-size: clamp(3.2rem, 6vw, 4.8rem);
  line-height: 1;
}

.hero-subtitle {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--blue-100);
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
  font-weight: 700;
}

.hero-text {
  max-width: 720px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 800;
  line-height: 1.2;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--green-500);
  color: var(--navy-950);
  box-shadow: 0 14px 34px rgba(48, 214, 138, 0.22);
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

.product-panel,
.checkout-card,
.contact-box,
.contact-form,
.brand-card,
.cta-box,
.feature-list article,
.notice-grid div,
.calculator-card,
.calculator-tool,
.legal-card {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.product-panel {
  padding: 18px;
  color: var(--gray-950);
}

.brand-hero .product-panel {
  justify-self: end;
  width: 100%;
  max-width: 390px;
  padding: 16px;
}

.panel-header {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
}

.panel-header span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gray-200);
}

.panel-header span:first-child {
  background: var(--green-500);
}

.search-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
  padding: 15px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--gray-100);
}

.search-row span {
  color: var(--gray-500);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.result-row {
  display: grid;
  gap: 3px;
  margin-top: 12px;
  padding: 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  color: var(--gray-700);
}

.result-row strong {
  color: var(--navy-950);
}

.result-row.is-active {
  border-color: rgba(48, 214, 138, 0.45);
  background: var(--green-100);
}

.intro-band {
  padding: 22px 0;
  background: var(--navy-900);
  color: var(--white);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
}

.intro-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.84);
  font-weight: 700;
}

.intro-grid span {
  color: var(--blue-100);
  font-size: 0.88rem;
  font-weight: 800;
}

.section {
  padding: 86px 0;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 32px;
}

.section-heading p {
  margin: 18px 0 0;
  color: var(--gray-700);
}

.advert-card {
  margin: 0;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.purchase-ad-card {
  margin-bottom: 34px;
}

.purchase-ad-link {
  display: block;
  color: inherit;
}

.purchase-ad-link:focus-visible {
  outline: 3px solid var(--green-500);
  outline-offset: 6px;
}

.advert-card img {
  display: block;
  width: 100%;
  height: auto;
}

.calculator-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.brand-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.brand-card,
.cta-box {
  display: grid;
  gap: 16px;
  padding: 26px;
}

.brand-card h3 {
  margin: 0;
}

.brand-card p,
.cta-box p {
  margin: 0;
}

.brand-card .button,
.cta-box .button {
  width: fit-content;
}

.calculator-card {
  display: grid;
  gap: 12px;
  min-height: 260px;
  padding: 22px;
  transition: transform 180ms ease, border-color 180ms ease;
}

.calculator-card:hover,
.calculator-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(48, 214, 138, 0.48);
}

.calculator-code {
  display: inline-grid;
  width: fit-content;
  min-width: 44px;
  min-height: 38px;
  place-items: center;
  padding: 7px 10px;
  border-radius: var(--radius);
  background: var(--navy-900);
  color: var(--green-500);
  font-size: 0.78rem;
  font-weight: 900;
}

.calculator-card h3 {
  margin: 0;
  font-size: 1.28rem;
}

.calculator-card p {
  margin: 0;
}

.calculator-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.calculator-meta span,
.calculator-status {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--gray-100);
  color: var(--gray-700);
  font-size: 0.74rem;
  font-weight: 900;
}

.calculator-meta .calculator-status {
  background: var(--green-100);
  color: #0c7044;
}

.calculator-link {
  align-self: end;
  color: var(--blue-500);
}

.section-action {
  margin-top: 26px;
}

.calculator-page {
  padding-top: var(--header-height);
  background: var(--white);
}

.tool-hero {
  padding: 78px 0 56px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(135deg, var(--navy-950), var(--navy-800));
  background-size: 42px 42px, 42px 42px, auto;
  color: var(--white);
}

.tool-hero h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  line-height: 1;
}

.tool-hero p:last-child {
  max-width: 820px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.08rem;
}

.calculator-tools-section {
  background: var(--gray-100);
}

.calculator-detail-grid {
  display: grid;
  gap: 24px;
}

.calculator-tool {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  gap: 34px;
  align-items: start;
  padding: 28px;
}

.tool-copy > p {
  margin: 16px 0 0;
}

.formula-box,
.example-box,
.note-box {
  display: grid;
  gap: 6px;
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--gray-100);
}

.formula-box strong,
.example-box strong,
.note-box strong {
  color: var(--navy-950);
}

.formula-box span,
.example-box p,
.note-box p {
  margin: 0;
  color: var(--gray-700);
}

.calc-form {
  display: grid;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
}

.calc-form label {
  display: grid;
  gap: 8px;
  color: var(--navy-950);
  font-size: 0.88rem;
  font-weight: 800;
}

.calc-form fieldset {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
}

.calc-form legend {
  padding: 0 6px;
  color: var(--navy-950);
  font-weight: 900;
}

.field-grid {
  display: grid;
  gap: 14px;
}

.calc-form input,
.calc-form select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--gray-950);
  font: inherit;
}

.calc-form input:focus,
.calc-form select:focus {
  outline: 3px solid rgba(48, 214, 138, 0.24);
  border-color: var(--green-500);
}

.result-box {
  display: block;
  min-height: 58px;
  padding: 16px;
  border-radius: var(--radius);
  background: var(--green-100);
  color: #0c7044;
  font-weight: 900;
}

.result-box.is-error {
  background: #fff3d6;
  color: #8a5b00;
}

.split-grid,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  gap: 46px;
  align-items: start;
}

h2 {
  margin: 0;
  color: var(--navy-950);
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.08;
}

h3 {
  margin: 18px 0 8px;
  color: var(--navy-950);
  font-size: 1.8rem;
  line-height: 1.1;
}

p {
  color: var(--gray-700);
}

.split-grid > div > p,
.contact-grid > div > p {
  margin: 18px 0 0;
  font-size: 1.02rem;
}

.feature-list {
  display: grid;
  gap: 14px;
}

.feature-list article,
.notice-grid div {
  padding: 20px;
  box-shadow: none;
}

.feature-list strong,
.feature-list span,
.notice-grid strong,
.notice-grid p {
  display: block;
}

.feature-list strong,
.notice-grid strong {
  color: var(--navy-950);
}

.feature-list span,
.notice-grid p {
  margin: 8px 0 0;
  color: var(--gray-700);
}

.notice-section {
  padding: 34px 0;
  background: var(--gray-100);
}

.notice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.commerce-section,
.contact-section {
  background: var(--gray-100);
}

.calculator-cta-section {
  background: var(--white);
}

.steps-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding-left: 22px;
  color: var(--gray-700);
  font-weight: 700;
}

.checkout-card,
.contact-box {
  padding: 26px;
}

.checkout-badge,
.checkout-status {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 900;
}

.checkout-badge {
  min-height: 30px;
  padding: 6px 10px;
  background: var(--green-100);
  color: #0c7044;
}

.checkout-status {
  margin: 0;
  color: var(--gray-500);
}

.checkout-status.is-ready {
  color: #0c7044;
}

.checkout-card ul {
  display: grid;
  gap: 10px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
  color: var(--gray-700);
}

.checkout-card li {
  position: relative;
  padding-left: 20px;
}

.checkout-card li::before {
  content: "";
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green-500);
}

.checkout-card .button,
.contact-box .button {
  width: 100%;
}

.small-note {
  margin: 14px 0 0;
  color: var(--gray-500);
  font-size: 0.9rem;
}

.contact-box {
  display: grid;
  gap: 14px;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 26px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--navy-950);
  font-size: 0.9rem;
  font-weight: 800;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--gray-950);
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 3px solid rgba(48, 214, 138, 0.24);
  border-color: var(--green-500);
}

.form-notice {
  margin: 0;
  color: var(--gray-700);
  font-size: 0.92rem;
  font-weight: 700;
}

.contact-actions {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.contact-mail-button {
  width: fit-content;
  border-color: rgba(6, 19, 31, 0.16);
  background: var(--white);
  color: var(--navy-950);
}

.contact-box span {
  color: var(--gray-500);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.contact-email {
  color: var(--navy-950);
  font-size: clamp(1.24rem, 3vw, 1.55rem);
  font-weight: 900;
  overflow-wrap: anywhere;
}

.site-footer {
  padding: 38px 0;
  background: var(--navy-950);
  color: rgba(255, 255, 255, 0.76);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: center;
}

.site-footer strong {
  color: var(--white);
}

.site-footer p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.76);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  font-weight: 700;
}

.legal-page {
  padding-top: var(--header-height);
  background: var(--gray-100);
}

.legal-hero {
  padding: 72px 0 42px;
  background: var(--navy-950);
  color: var(--white);
}

.legal-hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
}

.legal-hero p {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.legal-content {
  padding: 58px 0 86px;
}

.legal-card {
  max-width: 900px;
  padding: 34px;
}

.legal-card h2 {
  margin: 34px 0 10px;
  color: var(--navy-950);
  font-size: 1.4rem;
}

.legal-card h2:first-child {
  margin-top: 0;
}

.legal-card ul {
  padding-left: 20px;
}

.legal-card .text-link {
  display: inline;
  color: var(--blue-500);
  font-weight: 900;
}

@media (max-width: 860px) {
  :root {
    --header-height: 68px;
  }

  .section-shell {
    width: min(100% - 28px, var(--max-width));
  }

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

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 14px;
    right: 14px;
    display: grid;
    gap: 0;
    padding: 10px;
    border: 1px solid rgba(6, 19, 31, 0.12);
    border-radius: var(--radius);
    background: var(--white);
    color: var(--gray-950);
    box-shadow: var(--shadow);
    transform: translateY(-130%);
    transition: transform 200ms ease;
  }

  .site-nav.is-open {
    transform: translateY(0);
  }

  .site-nav a {
    padding: 13px;
    border-radius: var(--radius);
  }

  .hero-grid,
  .brand-hero .hero-grid,
  .split-grid,
  .contact-grid,
  .intro-grid,
  .brand-card-grid,
  .calculator-card-grid,
  .calculator-tool,
  .footer-grid,
  .notice-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: calc(var(--header-height) + 54px) 0 64px;
  }

  .section {
    padding: 66px 0;
  }

  .footer-nav {
    justify-content: flex-start;
  }
}

@media (max-width: 620px) {
  .brand-name {
    display: none;
  }

  .hero h1 {
    font-size: clamp(3.4rem, 18vw, 4.5rem);
    overflow-wrap: anywhere;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .brand-card .button,
  .cta-box .button,
  .contact-mail-button {
    width: 100%;
  }

  .product-panel,
  .checkout-card,
  .contact-box,
  .contact-form,
  .brand-card,
  .cta-box,
  .legal-card {
    padding: 20px;
  }

}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}