:root {
  color-scheme: light;
  --paper: #ffffff;
  --cream: #fff7f1;
  --soft: #fff0e7;
  --ink: #2c241f;
  --ink-soft: #6f635b;
  --coral: #ff6f5e;       /* 装飾用(バッジ枠・図・ブランド) */
  --coral-ink: #c83d2c;   /* 明背景の小さめ文字用 (白上 約5.6:1) */
  --coral-btn: #cf3f2a;   /* 白文字を載せるボタン/濃面用 (白上 約4.8:1) */
  --coral-deep: #a5341f;
  --teal: #17a89a;
  --teal-ink: #0c7468;    /* 明背景の小さめ文字用 */
  --sun: #ffb13c;
  --line: #f1e4da;
  --line-strong: #ecd6c8;
  --radius: 18px;
  --radius-lg: 26px;
  --header-h: 70px;
  --shadow: 0 20px 48px rgba(180, 90, 60, 0.16);
  --shadow-soft: 0 10px 28px rgba(180, 90, 60, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.78;
  overflow-wrap: break-word;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid rgba(255, 111, 94, 0.6);
  outline-offset: 3px;
}
button, input, select, textarea { font: inherit; }

.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 22px; }

.skip-link {
  position: fixed; left: 16px; top: 12px; z-index: 100; transform: translateY(-150%);
  background: var(--paper); border: 2px solid var(--coral); border-radius: 12px;
  color: var(--ink); font-weight: 800; padding: 8px 14px; transition: transform 150ms ease;
}
.skip-link:focus { transform: translateY(0); }

/* ===== header ===== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--header-h);
  padding: 0 max(20px, calc((100vw - 1100px) / 2));
  background: rgba(255, 247, 241, 0.82);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  backdrop-filter: blur(12px);
  transition: box-shadow 180ms ease;
}
.site-header.is-scrolled { box-shadow: 0 6px 22px rgba(180, 90, 60, 0.1); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; font-size: 1.06rem; color: var(--ink); }
.brand-mark { display: inline-flex; }
.brand-logo { display: block; flex-shrink: 0; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; background: transparent; border: 0; cursor: pointer; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform 160ms ease; }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

.site-nav { display: flex; align-items: center; gap: 24px; }
.site-nav a { color: var(--ink); font-size: 0.92rem; font-weight: 700; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--coral-ink); }
.nav-cta { padding: 9px 18px; border-radius: 999px; background: var(--coral-btn); color: #fff !important; box-shadow: 0 10px 24px rgba(207, 63, 42, 0.34); }

/* ===== buttons ===== */
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 54px; padding: 0 26px; border: 0; border-radius: 999px;
  font-weight: 800; line-height: 1.1; cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}
.button-primary { background: var(--coral-btn); color: #fff; box-shadow: 0 16px 34px rgba(207, 63, 42, 0.36); }
.button-primary:hover, .button-primary:focus-visible { background: #b8341f; transform: translateY(-1px); }
.button-ghost { border: 1.5px solid var(--line-strong); background: var(--paper); color: var(--ink); }
.button-ghost:hover, .button-ghost:focus-visible { border-color: var(--coral); color: var(--coral-ink); }

/* ===== hero ===== */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(60% 70% at 88% 12%, rgba(255, 177, 60, 0.22), transparent 60%),
    radial-gradient(70% 80% at 6% 92%, rgba(23, 168, 154, 0.14), transparent 60%),
    linear-gradient(165deg, #fff7f1 0%, #ffe9df 100%);
}
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 40px; align-items: center; padding: 132px 0 80px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px; padding: 6px 14px;
  border: 1px solid rgba(255, 111, 94, 0.5); border-radius: 999px; background: rgba(255, 111, 94, 0.1);
  color: var(--coral-deep); font-size: 0.8rem; font-weight: 800;
}
.hero-badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--coral); }
.eyebrow { margin: 0 0 12px; color: var(--coral-ink); font-size: 0.84rem; font-weight: 900; letter-spacing: 0.03em; }
.hero h1 { margin: 0; font-size: 3.4rem; line-height: 1.16; font-weight: 900; letter-spacing: -0.01em; }
.hero h1 .accent { color: #d8452f; }
.hero-lead { max-width: 560px; margin: 22px 0 0; color: #4d433c; font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.hero-points span {
  display: inline-flex; align-items: center; min-height: 38px; padding: 0 14px;
  border: 1px solid var(--line-strong); border-radius: 999px; background: rgba(255, 255, 255, 0.7);
  color: #4d433c; font-size: 0.88rem; font-weight: 800;
}
.hero-free { color: var(--teal-ink); }
.hero-note { max-width: 600px; margin: 24px 0 0; color: #8a7d74; font-size: 0.82rem; line-height: 1.7; }

/* hero illustration */
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; filter: drop-shadow(0 24px 50px rgba(180, 90, 60, 0.2)); }
.hero-art .art-note { margin: 10px 0 0; text-align: center; color: #a8988d; font-size: 0.74rem; }

/* ===== sections ===== */
.section { padding: 96px 0; }
.section-soft { background: var(--cream); }
.section-warm { background: linear-gradient(180deg, #fff7f1, #fff0e7); }
.section-heading { max-width: 720px; margin: 0 auto 44px; text-align: center; }
.section-heading h2 { margin: 6px 0 0; font-size: 1.95rem; line-height: 1.32; font-weight: 900; letter-spacing: -0.01em; }
.section-heading p:not(.eyebrow) { margin: 14px 0 0; color: var(--ink-soft); }
.mock-note { margin: 20px 0 0; color: var(--ink-soft); font-size: 0.8rem; line-height: 1.65; text-align: center; }

/* ===== features (3) ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.feature-card {
  padding: 28px 24px; border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--paper); box-shadow: var(--shadow-soft); text-align: center;
}
.feature-emoji { font-size: 2rem; line-height: 1; }
.feature-card h3 { margin: 14px 0 8px; font-size: 1.12rem; font-weight: 900; }
.feature-card p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

/* ===== steps (wizard) ===== */
.steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; }
.step {
  position: relative; padding: 22px 16px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper); box-shadow: var(--shadow-soft); text-align: center;
}
.step-emoji { font-size: 1.7rem; }
.step-no {
  display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px;
  margin: 10px auto 8px; border-radius: 50%; background: var(--coral-btn); color: #fff; font-size: 0.82rem; font-weight: 900;
}
.step h3 { margin: 0 0 6px; font-size: 0.98rem; font-weight: 800; }
.step p { margin: 0; color: var(--ink-soft); font-size: 0.86rem; line-height: 1.6; }

/* ===== examples ===== */
.example-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.example-card {
  padding: 26px 18px; border-radius: var(--radius); background: var(--paper);
  border: 1px solid var(--line); box-shadow: var(--shadow-soft); text-align: center;
}
.example-emoji {
  display: inline-flex; align-items: center; justify-content: center; width: 64px; height: 64px;
  margin-bottom: 12px; border-radius: 50%; background: var(--soft); font-size: 1.9rem;
}
.example-card h3 { margin: 0 0 6px; font-size: 1.02rem; font-weight: 800; }
.example-card p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

/* ===== spec + price band ===== */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.info-card {
  padding: 30px; border-radius: var(--radius-lg); background: var(--paper);
  border: 1px solid var(--line); box-shadow: var(--shadow-soft);
}
.info-card h3 { margin: 0 0 14px; font-size: 1.2rem; font-weight: 900; }
.info-card h3 .pill {
  display: inline-block; margin-left: 8px; padding: 2px 10px; border-radius: 999px;
  background: rgba(23, 168, 154, 0.14); color: var(--teal-ink); font-size: 0.72rem; font-weight: 800; vertical-align: middle;
}
.info-list { display: grid; gap: 10px; }
.info-list li { display: flex; gap: 10px; color: #4d433c; font-size: 0.96rem; }
.info-list li::before { content: "●"; color: var(--coral-ink); font-size: 0.7rem; line-height: 1.9; }
.info-note { margin: 14px 0 0; color: var(--ink-soft); font-size: 0.82rem; }

/* ===== trust ===== */
.trust-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.trust-card { display: flex; gap: 14px; padding: 20px 22px; border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.trust-emoji { font-size: 1.5rem; flex-shrink: 0; }
.trust-card h3 { margin: 0 0 4px; font-size: 1rem; font-weight: 800; }
.trust-card p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

/* ===== FAQ ===== */
.faq-list { display: grid; gap: 12px; max-width: 820px; margin: 0 auto; }
.faq-list details { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); box-shadow: var(--shadow-soft); overflow: hidden; }
.faq-list summary { cursor: pointer; list-style: none; padding: 18px 48px 18px 22px; position: relative; font-weight: 800; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: ""; position: absolute; right: 22px; top: 24px; width: 8px; height: 8px; border-right: 2px solid var(--coral); border-bottom: 2px solid var(--coral); transform: rotate(45deg); transition: transform 160ms ease; }
.faq-list details[open] summary::after { transform: rotate(-135deg); }
.faq-list details p { margin: 0; padding: 0 22px 20px; color: var(--ink-soft); }

/* ===== signup ===== */
.signup-section { padding: 96px 0; background: radial-gradient(70% 90% at 80% 10%, rgba(255, 177, 60, 0.16), transparent 60%), linear-gradient(150deg, #cf3f2a 0%, #bf3826 100%); color: #fff; }
.signup-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.signup-section .eyebrow { color: #fff3ee; }
.signup-section h2 { margin: 6px 0 0; font-size: 2rem; font-weight: 900; }
.signup-section > .container > div > p { color: rgba(255, 255, 255, 0.92); margin-top: 14px; }
.signup-form { display: grid; gap: 14px; padding: 26px; border-radius: var(--radius-lg); background: rgba(255, 255, 255, 0.16); border: 1px solid rgba(255, 255, 255, 0.3); backdrop-filter: blur(6px); }
.signup-form label { display: grid; gap: 6px; font-size: 0.86rem; font-weight: 800; color: #fff; }
.signup-form input, .signup-form select { min-height: 50px; padding: 0 14px; border: 0; border-radius: 12px; background: #fff; color: var(--ink); }
.signup-form select { padding: 0 10px; }
.form-button { width: 100%; margin-top: 4px; background: #fff; color: var(--coral-deep); }
.form-button:hover, .form-button:focus-visible { background: #fff7f1; }
.form-note { margin: 4px 0 0; font-size: 0.82rem; color: rgba(255, 255, 255, 0.92); }

/* ===== footer ===== */
.site-footer { padding: 32px 0; background: #2c241f; color: rgba(255, 255, 255, 0.82); }
.footer-layout { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.site-footer .brand { color: #fff; }
.footer-meta { margin: 0; text-align: right; font-size: 0.86rem; line-height: 1.7; }
.footer-meta a { color: #fff; text-decoration: underline; text-underline-offset: 2px; }
.footer-disclaimer { margin: 8px 0 0; color: rgba(255, 255, 255, 0.6); font-size: 0.76rem; line-height: 1.6; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* ===== legal / 404 ===== */
.legal { max-width: 760px; margin: 0 auto; padding: 110px 22px 80px; }
.legal h1 { margin: 0 0 6px; font-size: 2rem; font-weight: 900; }
.legal-date { margin: 0 0 28px; color: var(--ink-soft); font-size: 0.88rem; }
.legal h2 { margin: 34px 0 10px; font-size: 1.18rem; font-weight: 900; }
.legal h3 { margin: 22px 0 8px; font-size: 1.02rem; font-weight: 800; }
.legal p { margin: 0 0 12px; }
.legal ul { margin: 0 0 12px; padding-left: 1.2em; }
.legal li { list-style: disc; margin: 0 0 6px; }
.legal a { color: var(--coral-ink); text-decoration: underline; text-underline-offset: 2px; }
.notfound { max-width: 640px; margin: 0 auto; padding: 130px 22px 120px; text-align: center; }
.notfound h1 { margin: 0 0 8px; font-size: 4rem; font-weight: 900; color: var(--coral); }
.notfound p { margin: 0 0 24px; color: var(--ink-soft); }
.notfound-links { display: flex; flex-direction: column; gap: 8px; margin: 0 0 24px; }

/* ===== responsive ===== */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 30px; padding: 116px 0 64px; }
  .hero-art { max-width: 460px; margin: 0 auto; }
  .hero h1 { font-size: 2.9rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .example-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .duo, .trust-grid, .signup-layout { grid-template-columns: 1fr; gap: 22px; }
}
@media (max-width: 760px) {
  body.has-open-nav { overflow: hidden; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed; inset: var(--header-h) 0 0 0; flex-direction: column; justify-content: flex-start;
    gap: 4px; padding: 22px; background: rgba(255, 247, 241, 0.99); transform: translateX(100%);
    transition: transform 200ms ease; overflow-y: auto;
  }
  .site-nav.is-open { transform: translateX(0); }
  .site-nav a { width: 100%; padding: 12px 4px; font-size: 1.05rem; border-bottom: 1px solid var(--line); }
  .nav-cta { margin-top: 10px; justify-content: center; border-bottom: 0 !important; }
  .hero h1 { font-size: 2.4rem; }
  .section { padding: 68px 0; }
  .signup-section { padding: 68px 0; }
  .steps, .example-grid { grid-template-columns: 1fr; }
  .footer-layout { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-meta { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}