:root{
  --bg:#f7fafc;
  --bg-alt:#eef4f8;
  --surface:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --line:#dbe3ea;
  --primary:#15803d;
  --primary-dark:#166534;
  --primary-soft:#e8f5ec;
  --link:#166534;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 30px rgba(15,23,42,.06);
  --container:1120px;
  --container-narrow:800px;
  --space-xl:56px;
  --fz-xs:.875rem;
  --fz-sm:.95rem;
  --fz-base:1rem;
  --fz-md:1.125rem;
  --fz-xl:clamp(1.8rem, 3vw, 2.5rem);
  --lh:1.8;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);background:var(--bg);
  font-family:"Hiragino Sans","Yu Gothic","Meiryo",sans-serif;
  font-size:var(--fz-base);line-height:var(--lh)
}
img{max-width:100%;height:auto;display:block}
a{color:var(--link);text-decoration:none}
a:hover{opacity:.9}
p,ul,ol{margin:0 0 1em}
h1,h2,h3{margin:0 0 .7em;line-height:1.4;color:#0f172a}
h1{font-size:var(--fz-xl)}
h2{font-size:clamp(1.4rem,2.2vw,1.9rem)}
h3{font-size:clamp(1.08rem,1.7vw,1.25rem)}
fieldset{border:0;padding:0;margin:0;min-width:0}
legend{padding:0}
.hidden{
  position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0
}
.container{width:min(100% - 32px,var(--container));margin-inline:auto}
.container--narrow{width:min(100% - 32px,var(--container-narrow));margin-inline:auto}
.page-section{padding:var(--space-xl) 0}
.page-section--alt{background:var(--bg-alt)}
.page-section--cta{background:linear-gradient(180deg,var(--primary-soft) 0%,#f3fbf5 100%)}
.page-hero{
  padding:72px 0 56px;
  background:linear-gradient(180deg,rgba(21,128,61,.06) 0%,rgba(21,128,61,0) 100%),#fff;
  border-bottom:1px solid var(--line)
}
.page-hero--home{padding:84px 0 64px}
.hero-content{max-width:760px}
.hero-kicker{
  display:inline-block;margin-bottom:14px;padding:6px 10px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-dark);font-size:var(--fz-xs);font-weight:700
}
.hero-subtitle{font-size:var(--fz-md);color:var(--primary-dark);font-weight:700;margin:-8px 0 16px}
.hero-actions,.section-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:24px}
.section-subtext,.section-note,.breadcrumb,.post-card__meta,.reply-card__meta,.post-meta,.site-tagline{color:var(--muted);font-size:var(--fz-sm)}
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)
}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.site-logo{display:inline-block;font-weight:800;font-size:1.1rem;color:#0f172a}
.site-tagline{margin:4px 0 0;font-size:var(--fz-xs)}
.global-nav{flex:1 1 auto}
.global-nav__list{display:flex;align-items:center;justify-content:center;gap:22px;list-style:none;margin:0;padding:0}
.global-nav__list a{color:var(--text);font-size:var(--fz-sm);font-weight:600}
.site-footer{background:#0f172a;color:#d7e0ea}
.footer-inner{display:grid;grid-template-columns:1.2fr 2fr;gap:40px;padding:56px 0 32px}
.footer-title{margin:0 0 10px;font-size:1.1rem;font-weight:800;color:#fff}
.footer-text{color:#c7d2de;font-size:var(--fz-sm)}
.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-links__title{margin:0 0 12px;font-weight:700;color:#fff}
.footer-links ul{list-style:none;padding:0;margin:0}
.footer-links li + li{margin-top:8px}
.footer-links a{color:#d7e0ea;font-size:var(--fz-sm)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12)}
.copyright{margin:0;padding:16px 0 20px;font-size:var(--fz-xs);color:#b7c4d1}
.btn{
  display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 18px;
  border-radius:999px;border:1px solid transparent;font-weight:700;font-size:var(--fz-sm);line-height:1.2;cursor:pointer
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 20px rgba(21,128,61,.18)}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
.text-link{font-weight:700;color:var(--primary-dark)}
.card-grid{display:grid;gap:20px}
.card-grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.card-grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card,.topic-card,.post-card,.reply-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)
}
.card,.topic-card{padding:24px}
.post-card,.reply-card,.post-body,.site-form{padding:22px}
.topic-card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.topic-card__count,.post-card__category,.post-category-badge{
  display:inline-flex;align-items:center;justify-content:center;padding:6px 10px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-dark);font-size:var(--fz-xs);font-weight:700
}
.topic-card__examples{margin:16px 0 18px;color:var(--muted)}
.topic-card__actions,.form-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.post-list,.reply-list{display:grid;gap:16px}
.post-card__meta{margin-top:16px}
.reply-card__meta{margin-bottom:12px;font-weight:700}
.check-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.check-list li{
  position:relative;padding:14px 16px 14px 44px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm)
}
.check-list li::before{
  content:"✓";position:absolute;left:16px;top:50%;transform:translateY(-50%);
  width:18px;height:18px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;
  background:var(--primary-soft);color:var(--primary-dark);font-size:12px;font-weight:800
}
.notice-box{
  margin:18px 0 24px;padding:18px 20px;border:1px solid #cfe3d5;border-radius:var(--radius-sm);background:#f7fcf8
}
.notice-box p{margin:0;color:#35523d;font-size:var(--fz-sm)}
.notice-box p + p{margin-top:8px}
.site-form{margin-top:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.form-group + .form-group{margin-top:18px}
.form-label{display:block;margin-bottom:8px;font-weight:700;color:#0f172a}
.form-input,.form-select,.form-textarea{
  width:100%;border:1px solid #cfd8e3;border-radius:12px;background:#fff;color:var(--text);padding:14px 15px;font:inherit;line-height:1.5
}
.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:#78b78b;box-shadow:0 0 0 4px rgba(21,128,61,.12)}
.form-textarea{resize:vertical;min-height:140px}
.form-check-group{display:grid;gap:10px}
.form-check{display:flex;align-items:flex-start;gap:10px;cursor:pointer}
.form-check input[type="checkbox"]{margin-top:4px}
.form-group--check{margin-top:22px}
@media (max-width:980px){
  .header-inner{flex-wrap:wrap;justify-content:flex-start;padding:14px 0}
  .global-nav{order:3;width:100%}
  .global-nav__list{justify-content:flex-start;flex-wrap:wrap;gap:12px 18px}
  .header-cta{margin-left:auto}
  .footer-inner{grid-template-columns:1fr}
  .footer-links{grid-template-columns:repeat(2,1fr)}
  .card-grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container,.container--narrow{width:min(100% - 24px,var(--container))}
  .page-hero{padding:56px 0 40px}
  .page-hero--home{padding:64px 0 46px}
  .site-tagline{display:none}
  .header-cta{width:100%;margin-left:0}
  .header-cta .btn,.hero-actions .btn,.section-actions .btn,.topic-card__actions .btn,.form-actions .btn{width:100%}
  .hero-actions,.section-actions,.topic-card__actions,.form-actions{flex-direction:column}
  .card-grid--2,.card-grid--3,.footer-links{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start}
}
.section-lead{
  margin:0 0 20px;
  color:var(--muted);
  line-height:1.8;
}
.example-box,
.template-box,
.topic-intro-box,
.inline-cta-box{
  margin:18px 0 24px;
  padding:20px;
  border:1px solid #cfe3d5;
  border-radius:var(--radius-sm);
  background:#f7fcf8;
}

.example-box h3,
.template-box h3,
.topic-intro-box h3,
.inline-cta-box h3{
  margin:0 0 12px;
  font-size:1rem;
  color:var(--primary-dark);
}

.example-list{
  margin:0;
  padding-left:1.2em;
}

.example-list li + li{
  margin-top:8px;
}

.template-box p,
.topic-intro-box p,
.inline-cta-box p{
  margin:0 0 10px;
}

.template-box p:last-child,
.topic-intro-box p:last-child,
.inline-cta-box p:last-child{
  margin-bottom:0;
}

.template-sample{
  margin-top:14px;
  padding:16px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:12px;
  color:var(--text);
  line-height:1.9;
}

.topic-card p + .topic-card__example,
.card p + .topic-card__example{
  margin-top:12px;
}

.topic-card__example,
.card .topic-card__example{
  color:var(--muted);
  font-size:var(--fz-sm);
  line-height:1.7;
}

.hero-note{
  margin-top:16px;
  padding:14px 16px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:12px;
  color:var(--muted);
  font-size:var(--fz-sm);
}

@media (max-width:767px){
  .example-box,
  .template-box,
  .topic-intro-box,
  .inline-cta-box{
    padding:16px;
  }
}