:root {
  --color-background: #fafcfa;
  --color-surface: #f2f8f6;
  --color-primary: #007c70;
  --color-primary-dark: #005f57;
  --color-accent: #91ebdd;
  --color-accent-soft: #d8f4ef;
  --color-text: #172321;
  --color-text-secondary: #53605d;
  --color-border: #b8cac6;
  --color-danger: #b42318;
  --content-width: 1120px;
  --reading-width: 760px;
  --radius-lg: 32px;
  --radius-md: 20px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-background);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}

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

a {
  color: var(--color-primary-dark);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-primary);
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: #fff;
  background: var(--color-primary-dark);
  border-radius: 10px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  border-bottom: 1px solid rgba(184, 202, 198, 0.65);
  background: rgba(250, 252, 250, 0.96);
}

.header-inner,
.site-footer,
.section,
.hero {
  width: min(calc(100% - 40px), var(--content-width));
  margin-inline: auto;
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--color-text);
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border);
  border-radius: 11px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  color: var(--color-text-secondary);
  font-weight: 650;
  text-decoration: none;
  border-radius: 999px;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-primary-dark);
  background: var(--color-accent-soft);
}

.hero {
  padding-block: clamp(52px, 9vw, 112px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  align-items: center;
  gap: clamp(40px, 8vw, 96px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(2.65rem, 7vw, 5.5rem);
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 3.25rem);
}

h3 {
  margin-bottom: 10px;
  font-size: 1.25rem;
}

.lead {
  max-width: 650px;
  margin: 0;
  color: var(--color-text-secondary);
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
}

.hero-action {
  margin-top: 32px;
}

.coming-soon {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  color: var(--color-primary-dark);
  background: var(--color-accent-soft);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-weight: 750;
}

.hero-art {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
  padding: 52px;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 48px;
}

.hero-art::before,
.hero-art::after {
  position: absolute;
  content: "";
  border-radius: 999px;
}

.hero-art::before {
  width: 220px;
  height: 220px;
  top: -90px;
  right: -70px;
  background: var(--color-accent);
  opacity: 0.55;
}

.hero-art::after {
  width: 150px;
  height: 150px;
  bottom: -52px;
  left: -45px;
  border: 28px solid var(--color-primary);
  opacity: 0.13;
}

.hero-icon {
  position: relative;
  z-index: 1;
  width: min(100%, 250px);
  border: 1px solid var(--color-border);
  border-radius: 25%;
}

.section {
  padding-block: clamp(60px, 9vw, 104px);
}

.section + .section {
  border-top: 1px solid rgba(184, 202, 198, 0.65);
}

.section-heading {
  max-width: 660px;
  margin-bottom: 40px;
}

.section-heading p,
.card p,
.notice p {
  color: var(--color-text-secondary);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: clamp(24px, 4vw, 36px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.card p:last-child,
.notice p:last-child {
  margin-bottom: 0;
}

.step-number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  color: #fff;
  background: var(--color-primary);
  border-radius: 50%;
  font-weight: 800;
}

.principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.principles li {
  min-height: 84px;
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 20px 22px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-weight: 700;
}

.principles li::before {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  content: "";
  background: var(--color-accent);
  border: 3px solid var(--color-primary);
  border-radius: 50%;
}

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

.notice {
  padding: clamp(24px, 4vw, 36px);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.notice.accent {
  background: var(--color-accent-soft);
}

.text-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-weight: 750;
}

.page-hero {
  padding-block: clamp(48px, 8vw, 88px);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-hero-inner,
.prose {
  width: min(calc(100% - 40px), var(--reading-width));
  margin-inline: auto;
}

.page-hero h1 {
  margin-bottom: 18px;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
}

.page-hero .lead {
  font-size: 1.12rem;
}

.meta {
  margin-top: 20px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.prose {
  padding-block: clamp(52px, 8vw, 88px);
}

.prose section + section {
  margin-top: 52px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
}

.prose h2 {
  font-size: clamp(1.65rem, 3vw, 2.2rem);
}

.prose h3 {
  margin-top: 28px;
}

.prose li + li {
  margin-top: 9px;
}

.prose a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.tip-list {
  columns: 2;
  column-gap: 48px;
}

.site-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding-block: 48px;
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border);
}

.footer-brand p {
  margin: 10px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 4px 18px;
}

.footer-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.error-main {
  width: min(calc(100% - 40px), 720px);
  flex: 1;
  display: grid;
  place-items: center;
  margin-inline: auto;
  padding-block: 64px;
  text-align: center;
}

.error-code {
  margin: 0;
  color: var(--color-primary);
  font-size: clamp(5rem, 20vw, 10rem);
  font-weight: 850;
  line-height: 0.9;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
  padding: 10px 22px;
  color: #fff;
  background: var(--color-primary);
  border-radius: 999px;
  font-weight: 750;
  text-decoration: none;
}

.button:hover {
  color: #fff;
  background: var(--color-primary-dark);
}

@media (max-width: 760px) {
  .header-inner {
    min-height: auto;
    flex-direction: column;
    align-items: flex-start;
    padding-block: 14px;
    gap: 6px;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
  }

  .site-nav a {
    padding-inline: 10px;
    white-space: nowrap;
  }

  .hero-grid,
  .card-grid,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-art {
    min-height: 320px;
    order: -1;
  }

  .hero-icon {
    width: 190px;
  }

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

  .site-footer {
    flex-direction: column;
  }

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

@media (max-width: 480px) {
  .header-inner,
  .site-footer,
  .section,
  .hero,
  .page-hero-inner,
  .prose {
    width: min(calc(100% - 28px), var(--content-width));
  }

  .hero-art {
    min-height: 270px;
    padding: 40px;
    border-radius: 34px;
  }

  .tip-list {
    columns: 1;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}