:root {
  --bg: #fffaf7;
  --surface: #ffffff;
  --text: #2b2024;
  --muted: #6d5f64;
  --border: #f0e1da;
  --accent: #e8476f;
  --accent-strong: #c92f58;
  --accent-soft: #ffe9e4;
  --sunset: linear-gradient(180deg, #ff5f8f, #ffa24c);
  --shadow: 0 12px 40px rgba(201, 47, 88, 0.12);

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1416;
    --surface: #241c1f;
    --text: #f5ecee;
    --muted: #b9a9ae;
    --border: #3a2e32;
    --accent: #ff8aa6;
    --accent-strong: #ffb0c2;
    --accent-soft: #3b2328;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', 'Hiragino Sans', 'Yu Gothic UI', Meiryo, sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

a {
  color: var(--accent);
}

a:hover {
  color: var(--accent-strong);
}

code {
  font-family: ui-monospace, 'Cascadia Mono', Consolas, monospace;
  font-size: 0.9em;
}

main,
.site-header,
.site-footer {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* Header */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  padding-bottom: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 19px;
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.lang {
  padding: 4px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 15px;
  text-decoration: none;
}

/* Home */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  align-items: center;
  gap: 48px;
  padding: 40px 0 64px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 19px;
}

.button {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--sunset);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.button.is-disabled {
  background: var(--accent-soft);
  color: var(--accent-strong);
  cursor: default;
}

.hero-card {
  padding: 28px;
  border-radius: 28px;
  background: var(--sunset);
  box-shadow: var(--shadow);
}

.mock {
  padding: 18px 20px;
  border-radius: 16px;
  background: var(--surface);
  font-size: 14px;
  line-height: 1.5;
}

.mock p {
  margin: 0;
}

.mock-label {
  margin-top: 12px !important;
  margin-bottom: 4px !important;
  font-weight: 700;
}

.mock-label:first-child {
  margin-top: 0 !important;
}

.mock-option {
  padding: 2px 0 2px 24px;
  position: relative;
  color: var(--muted);
}

.mock-option::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 6px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-radius: 50%;
}

.mock-option.is-on {
  color: var(--text);
}

.mock-option.is-on::before {
  border-color: var(--accent);
  background: radial-gradient(var(--accent) 45%, transparent 50%);
}

.mock-option code {
  display: block;
  color: var(--muted);
}

.mock-segment {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.mock-segment span {
  flex: 1;
  padding: 4px 6px;
  text-align: center;
  color: var(--muted);
}

.mock-segment .is-on {
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 700;
}

.mock-input {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.mock-preview {
  margin-top: 12px !important;
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--bg);
}

.mock-button {
  margin-top: 12px !important;
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

section h2 {
  margin: 0 0 24px;
  font-size: 28px;
  line-height: 1.3;
}

.features,
.safety,
.steps {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

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

.feature {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.feature p {
  margin: 0;
  color: var(--muted);
}

.checks {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.checks li {
  position: relative;
  padding-left: 34px;
}

.checks li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--sunset);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  line-height: 22px;
  text-align: center;
}

.steps ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 14px;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 46px;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 700;
  line-height: 32px;
  text-align: center;
}

/* Documents */

.doc {
  max-width: 760px;
  padding: 24px 0 64px;
  overflow-wrap: break-word;
}

.doc h1 {
  margin: 0 0 8px;
  font-size: 34px;
  line-height: 1.3;
}

.doc h2 {
  margin: 40px 0 12px;
  font-size: 23px;
}

.doc h3 {
  margin: 28px 0 8px;
  font-size: 19px;
}

.doc table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 15px;
}

.doc th,
.doc td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.doc th {
  background: var(--accent-soft);
}

.doc li + li {
  margin-top: 4px;
}

/* Footer */

.site-footer {
  padding-top: 32px;
  padding-bottom: 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-bottom: 12px;
}

.site-footer a {
  color: var(--muted);
}

.fineprint {
  margin: 4px 0 0;
  font-size: 13px;
}

@media (max-width: 760px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding-top: 16px;
  }

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

  .hero-card {
    padding: 16px;
  }
}