:root {
  color-scheme: light;
  --paper: #f8f9f4;
  --white: #fffefb;
  --ink: #1c3c32;
  --green: #215c50;
  --deep: #163d34;
  --muted: #5c6f66;
  --line: #dbe5dc;
  --sage: #9dc17b;
  --wash: #edf4ed;
  --red: #a6423c;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 94px; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.82; }
img { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: .22em; }
button, summary { font: inherit; }
::selection { color: var(--deep); background: #d6e9d2; }
:focus-visible { outline: 3px solid #4c9379; outline-offset: 4px; }

.shell { width: min(1200px, calc(100% - 88px)); margin-inline: auto; }
.skip-link { position: fixed; top: -80px; left: 20px; z-index: 100; padding: 10px 16px; color: white; background: var(--deep); }
.skip-link:focus { top: 12px; }

.site-header { position: relative; z-index: 20; background: rgba(248, 249, 244, .97); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 80px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; white-space: nowrap; font-family: Georgia, "Yu Mincho", serif; font-size: 25px; font-weight: 700; line-height: 1; letter-spacing: -.045em; }
.brand img { border-radius: 8px; flex: none; }
.brand strong { font-family: inherit; font-size: .7em; font-weight: 600; letter-spacing: .025em; }
.desktop-nav { display: flex; align-items: center; gap: clamp(18px, 3vw, 38px); font-size: 13px; font-weight: 600; }
.desktop-nav a { text-decoration: none; transition: color .18s ease; white-space: nowrap; }
.desktop-nav a:hover { color: var(--green); }
.desktop-nav .nav-download { border: 1px solid var(--green); border-radius: 5px; padding: 10px 19px; }
.desktop-nav .nav-download:hover { background: var(--green); color: var(--white); }
.mobile-nav { display: none; }

.hero { display: grid; grid-template-columns: minmax(0, 1.03fr) minmax(0, .97fr); align-items: end; gap: clamp(52px, 7vw, 120px); padding-block: clamp(76px, 9vw, 132px) 58px; }
.hero-kicker, .section-label { display: flex; align-items: center; gap: 10px; margin: 0 0 34px; color: var(--green); font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.live-dot { width: 7px; height: 7px; flex: none; border-radius: 50%; background: #78a96a; }
.hero h1 { margin: 0; font-size: clamp(48px, 4.7vw, 74px); font-weight: 800; letter-spacing: -.075em; line-height: 1.35; }
.hero-secondary { margin: 25px 0 0; font-size: clamp(18px, 1.55vw, 22px); font-weight: 600; letter-spacing: .025em; line-height: 1.8; }
.hero-description { padding-bottom: 4px; }
.hero-description > p:not(.hero-meta) { max-width: 44ch; margin: 0 0 14px; font-size: 15px; line-height: 2.15; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 32px; }
.button { min-height: 51px; display: inline-flex; align-items: center; justify-content: center; gap: 16px; padding: 12px 22px; border: 1px solid var(--green); border-radius: 5px; text-align: center; text-decoration: none; font-size: 14px; font-weight: 700; line-height: 1.4; transition: color .18s ease, background .18s ease, transform .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: var(--green); }
.button-primary:hover { background: #164a3f; }
.button-outline { color: var(--green); background: transparent; }
.button-outline:hover { color: white; background: var(--green); }
.text-link { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 700; text-decoration-thickness: 1px; }
.text-link:hover { color: var(--green); }
.hero-meta { margin: 25px 0 0; color: var(--muted); font-size: 12px; letter-spacing: .025em; }
.hero-meta span { margin-inline: 6px; color: #a9b7ad; }

.workspace { margin-top: 6px; margin-bottom: 0; }
.workspace-frame { overflow: hidden; padding: 9px; background: #eaf0e5; border: 1px solid #cfdbce; border-radius: 12px; box-shadow: 0 25px 70px rgba(27, 61, 49, .08); }
.window-topline { min-height: 28px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 12px 8px; color: #768679; font-size: 10px; letter-spacing: .1em; }
.window-topline > :last-child { text-align: right; }
.window-dots { display: flex; gap: 5px; }
.window-dots i { width: 7px; height: 7px; border-radius: 50%; background: #8da991; }
.workspace-frame > a { display: block; overflow: hidden; border: 1px solid #cfddda; border-radius: 5px; background: white; }
.workspace-frame img { width: 100%; height: auto; }
.workspace figcaption { padding: 14px 4px 0; color: var(--muted); font-size: 12px; line-height: 1.7; }

.hero-update { margin: 20px 0 0; padding: 14px 18px; border-left: 3px solid var(--green); background: var(--wash); color: var(--ink); font-size: 13px; line-height: 1.9; }
.hero-update strong { margin-right: 8px; color: var(--green); }
.hero-update a { display: inline-block; margin-left: 12px; color: var(--green); text-decoration: underline; text-underline-offset: 3px; }
.section { padding-block: clamp(90px, 10vw, 144px); }
.section-heading { margin-bottom: 49px; }
.section-label { margin-bottom: 19px; }
.section h2 { margin: 0; font-size: clamp(38px, 3.9vw, 59px); font-weight: 800; letter-spacing: -.065em; line-height: 1.43; }
.section h3 { margin: 0; font-size: 20px; font-weight: 700; line-height: 1.55; letter-spacing: -.03em; }
.section p { font-size: 15px; }
.split-heading { display: grid; grid-template-columns: 1fr .82fr; align-items: end; gap: 72px; }
.split-heading > p { max-width: 46ch; margin: 0 0 5px; color: var(--muted); line-height: 2.05; }

.how-section { border-bottom: 1px solid var(--line); }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 40px 1fr; gap: 16px; padding: 33px 29px 4px 0; }
.steps li + li { padding-left: 30px; border-left: 1px solid var(--line); }
.step-number { color: var(--green); font: 600 14px/1.55 Georgia, serif; }
.steps h3 { margin: 0 0 11px; }
.steps p { max-width: 33ch; margin: 0; color: var(--muted); font-size: 13px; line-height: 2; }

.feature-section { background: var(--white); }
.feature-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 58px; border-top: 1px solid var(--line); }
.feature-item { display: grid; grid-template-columns: 60px 1fr; align-items: start; gap: 17px; min-height: 160px; padding: 30px 10px 27px 0; border-bottom: 1px solid var(--line); }
.feature-mark { width: 42px; height: 42px; display: grid; place-items: center; color: var(--green); background: #edf5ed; border-radius: 9px; font-size: 22px; font-weight: 700; line-height: 1; }
.seal-mark { color: var(--red); background: #f8efeb; border: 1px solid #d8aca2; border-radius: 50%; font-family: "Yu Mincho", serif; font-size: 19px; }
.feature-item h3 { margin: 1px 0 9px; }
.feature-item p { max-width: 42ch; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }

.safety-section { background: var(--wash); }
.safety-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11%; }
.safety-intro > p:last-child { max-width: 37ch; margin: 30px 0 0; line-height: 2.06; }
.safety-points { border-top: 1px solid #cbd9cd; }
.safety-points > div { display: grid; grid-template-columns: 40px 1fr; column-gap: 16px; padding: 22px 0; border-bottom: 1px solid #cbd9cd; }
.safety-symbol { grid-row: span 2; color: var(--green); font-size: 21px; line-height: 1.2; }
.safety-points h3 { font-size: 17px; }
.safety-points p { max-width: 43ch; margin: 6px 0 0; color: #50675a; font-size: 13px; line-height: 1.9; }

.developer-section { overflow: hidden; color: white; background: var(--deep); }
.developer-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(55px, 8vw, 125px); align-items: center; }
.developer-photo { max-width: 420px; padding: 9px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .07); }
.developer-photo img { width: 100%; aspect-ratio: 1; object-fit: cover; object-position: center top; background: #e6e8e9; }
.developer-copy .section-label { color: #b5d49f; }
.developer-copy h2 { font-size: clamp(37px, 3.6vw, 55px); }
.developer-copy > p:not(.section-label) { max-width: 49ch; margin: 26px 0 0; color: #e0ece5; line-height: 2.1; }
.developer-signature { display: flex; align-items: baseline; flex-wrap: wrap; gap: 15px; margin-top: 35px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.26); }
.developer-signature strong { font-size: 23px; letter-spacing: .07em; }
.developer-signature span { color: #bfd5c8; font-size: 11px; }
.light-link { margin-top: 23px; color: #d5ead0; }
.light-link:hover { color: white; }

.download-section { background: var(--white); }
.download-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px; }
.download-option { display: flex; flex-direction: column; min-height: 325px; padding: 29px 30px 27px; background: #fafbf7; border: 1px solid var(--line); border-top: 4px solid var(--green); }
.download-title { display: flex; align-items: baseline; justify-content: space-between; gap: 15px; }
.download-title h3 { font-family: Georgia, "Yu Mincho", serif; font-size: 31px; letter-spacing: -.055em; }
.download-title span { color: var(--muted); font-size: 11px; }
.download-option p { max-width: 48ch; margin: 16px 0 25px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.download-option .button { align-self: flex-start; margin-top: auto; }
.download-alt { align-self: flex-start; margin-top: 15px; color: var(--green); font-size: 12px; font-weight: 700; }
.download-footnote { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 28px; margin-top: 24px; }
.download-footnote p { max-width: 76ch; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.9; }
.download-footnote a { color: var(--green); font-weight: 700; }
.download-footnote > div { white-space: nowrap; text-align: right; font-size: 12px; line-height: 2; }

.faq-section { border-top: 1px solid var(--line); }
.faq-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 11%; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; display: block; padding: 22px 39px 22px 0; cursor: pointer; font-size: 15px; font-weight: 700; line-height: 1.7; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; right: 5px; top: 19px; content: "+"; color: var(--green); font-size: 23px; font-weight: 400; line-height: 1; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 62ch; margin: -4px 0 25px; color: var(--muted); font-size: 13px; line-height: 2; }

.contact-section { border-top: 1px solid var(--line); background: var(--wash); }
.contact-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 11%; align-items: start; }
.contact-copy p { max-width: 62ch; margin: 3px 0 26px; color: var(--muted); line-height: 2; }
.contact-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px 27px; }

.privacy-page { max-width: 920px; padding-block: 90px 120px; }
.privacy-page .section-label { margin-bottom: 14px; }
.privacy-page h1 { margin: 0; font-size: clamp(42px, 5vw, 64px); letter-spacing: -.06em; line-height: 1.35; }
.privacy-lead { max-width: 67ch; margin: 24px 0 52px; color: var(--muted); font-size: 16px; }
.privacy-page section { border-top: 1px solid var(--line); padding: 27px 0 30px; }
.privacy-page h2 { margin: 0 0 12px; font-size: 21px; }
.privacy-page section p { max-width: 75ch; margin: 0; color: var(--muted); font-size: 14px; line-height: 2; }
.privacy-page code { padding: 2px 5px; background: var(--wash); }
.privacy-more { margin: 15px 0 0; font-size: 13px; }
.privacy-page a { color: var(--green); }
.guide-breadcrumb { display: flex; align-items: center; gap: 9px; margin-bottom: 35px; color: var(--muted); font-size: 12px; }
.guide-home-link { display: inline-flex; margin-top: 28px; }
.guide-page .privacy-lead { margin-bottom: 26px; }
.guide-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 15px 24px; margin-bottom: 48px; }
.guide-actions .button-primary { color: #fff; }
.guide-shot { margin: 0 0 40px; }
.guide-shot img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 12px 38px rgba(31, 56, 48, .08); }
.guide-shot figcaption { margin-top: 10px; color: var(--muted); font-size: 12px; }
.privacy-page section .guide-note { margin-top: 13px; padding: 13px 15px; border-left: 3px solid var(--green); background: var(--wash); }
.guide-end { margin: 30px 0 0; }
.guide-end .button { color: #fff; }

.site-footer { color: #dfece3; background: #173b32; }
.footer-main { display: flex; justify-content: space-between; gap: 36px; padding-block: 49px 47px; }
.footer-main .brand { color: white; font-size: 23px; }
.footer-main p { margin: 14px 0 0; color: #b8d1c1; font-size: 12px; }
.footer-main nav { display: flex; align-items: start; flex-wrap: wrap; justify-content: flex-end; gap: 13px 26px; max-width: 430px; font-size: 12px; }
.footer-main nav a:hover { color: var(--ink); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-block: 18px 26px; border-top: 1px solid rgba(255,255,255,.2); color: #aac6b4; font-size: 11px; }

.not-found-page { min-height: 100vh; }
.not-found { padding-block: 60px; }
.not-found .section-label { margin-top: 70px; margin-bottom: 12px; }
.not-found h1 { margin: 0; font-size: clamp(36px, 5vw, 66px); line-height: 1.4; }
.not-found p:not(.section-label) { max-width: 46ch; margin: 20px 0 30px; color: var(--muted); }

@media (max-width: 1050px) {
  .shell { width: min(100% - 56px, 1200px); }
  .header-inner { gap: 14px; }
  .brand { font-size: 22px; }
  .desktop-nav { gap: 17px; font-size: 12px; }
  .hero { gap: 40px; }
  .hero h1 { font-size: clamp(38px, 4.8vw, 54px); }
}

@media (max-width: 760px) {
  html { scroll-padding-top: 76px; }
  .shell { width: min(100% - 36px, 640px); }
  .header-inner { min-height: 70px; }
  .brand { font-size: 21px; }
  .brand img { width: 33px; height: 33px; }
  .desktop-nav { display: none; }
  .mobile-nav { display: block; position: relative; }
  .mobile-nav summary { display: inline-flex; align-items: center; gap: 10px; padding: 9px 2px 9px 11px; cursor: pointer; font-size: 12px; font-weight: 700; list-style: none; }
  .mobile-nav summary::-webkit-details-marker { display: none; }
  .mobile-nav summary span { font-size: 21px; font-weight: 400; line-height: 1; }
  .mobile-nav nav { position: absolute; right: 0; top: calc(100% + 12px); width: min(270px, calc(100vw - 36px)); display: flex; flex-direction: column; padding: 10px 21px; background: var(--white); border: 1px solid var(--line); box-shadow: 0 15px 30px rgba(25,55,43,.12); }
  .mobile-nav nav a { padding: 11px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-size: 14px; }
  .mobile-nav nav a:last-child { border-bottom: 0; }
  .hero { grid-template-columns: 1fr; gap: 23px; padding-block: 72px 38px; }
  .hero-kicker { margin-bottom: 25px; }
  .hero h1 { font-size: clamp(38px, 7.7vw, 58px); }
  .hero-secondary { margin-top: 19px; }
  .hero-description > p:not(.hero-meta) { max-width: 58ch; }
  .hero-actions { margin-top: 25px; }
  .workspace-frame { padding: 5px; border-radius: 7px; }
  .window-topline { min-height: 20px; padding: 0 6px 5px; font-size: 8px; }
  .window-dots i { width: 5px; height: 5px; }
  .section { padding-block: 84px; }
  .split-heading, .safety-grid, .developer-grid, .faq-grid, .contact-grid { grid-template-columns: 1fr; gap: 35px; }
  .split-heading > p { max-width: 56ch; }
  .steps { grid-template-columns: 1fr; }
  .steps li { padding: 22px 0; }
  .steps li + li { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .feature-list { column-gap: 25px; }
  .feature-item { grid-template-columns: 44px 1fr; gap: 10px; }
  .feature-mark { width: 37px; height: 37px; font-size: 19px; }
  .developer-photo { max-width: 360px; }
  .developer-copy h2 { margin-top: 3px; }
  .download-footnote { grid-template-columns: 1fr; align-items: start; }
  .download-footnote > div { text-align: left; }
}

@media (max-width: 550px) {
  .shell { width: calc(100% - 32px); }
  .brand { gap: 8px; font-size: 19px; }
  .hero { padding-top: 55px; }
  .hero-kicker { font-size: 11px; line-height: 1.65; }
  .hero h1 { font-size: clamp(32px, 8.6vw, 45px); }
  .hero-secondary { font-size: 17px; }
  .hero-description > p:not(.hero-meta) { font-size: 14px; line-height: 1.95; }
  .hero-actions { align-items: stretch; gap: 18px; }
  .hero-actions .button { width: 100%; }
  .hero-meta { font-size: 11px; }
  .workspace figcaption { font-size: 11px; }
  .window-topline { grid-template-columns: 1fr auto; }
  .window-topline > span:nth-child(2) { display: none; }
  .section { padding-block: 69px; }
  .section h2 { font-size: clamp(34px, 8.5vw, 46px); }
  .section h3 { font-size: 18px; }
  .section-heading { margin-bottom: 33px; }
  .feature-list, .download-grid { grid-template-columns: 1fr; }
  .feature-item { min-height: auto; padding-block: 24px; }
  .feature-item p { font-size: 13px; }
  .safety-points > div { padding-block: 20px; }
  .developer-grid { gap: 30px; }
  .developer-photo { max-width: 300px; }
  .developer-copy > p:not(.section-label) { font-size: 14px; }
  .download-grid { gap: 20px; }
  .download-option { min-height: 285px; padding: 25px 22px; }
  .download-title h3 { font-size: 27px; }
  .faq-list summary { font-size: 14px; }
  .guide-actions .button, .guide-end .button { width: 100%; }
  .guide-page h1 { font-size: clamp(30px, 8.5vw, 39px); line-height: 1.42; }
  .footer-main { flex-direction: column; padding-block: 38px; }
  .contact-actions .button { width: 100%; }
  .footer-main nav { justify-content: flex-start; }
  .footer-bottom { flex-direction: column; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

.series-links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 26px; border-top: 1px solid var(--line); padding-block: 26px; font-size: 13px; }
.series-links strong { font-size: 12px; }
.series-links a { color: var(--ink); text-underline-offset: 4px; }
@media (max-width: 740px) { .series-links { gap: 12px 20px; font-size: 12px; } .series-links strong { width: 100%; } }