:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: #202b35;
  background: #f7f5ef;
  font-synthesis: none;
}

* { box-sizing: border-box; }
body { margin: 0; }
.shell { width: min(100% - 32px, 980px); margin: 0 auto; padding: 48px 0 64px; }
.hero { padding: 0 4px 28px; }
.eyebrow { color: #60704c; font-size: .78rem; font-weight: 700; letter-spacing: .14em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); line-height: 1.35; letter-spacing: -.04em; margin: 14px 0; }
.lead { max-width: 750px; color: #4c5862; font-size: 1.05rem; line-height: 1.85; }
.card { background: #fff; border: 1px solid #e6e5df; border-radius: 16px; box-shadow: 0 8px 24px #202b350a; margin: 20px 0; padding: clamp(22px, 4vw, 36px); }
.section-heading { display: flex; align-items: baseline; gap: 16px; margin-bottom: 18px; }
.step { color: #6b784e; font-size: .85rem; font-weight: 800; letter-spacing: .08em; }
h2 { font-size: 1.45rem; margin: 0; }
.notice { background: #f1f4e9; border-left: 4px solid #779057; border-radius: 4px; line-height: 1.8; margin: 0 0 22px; padding: 14px 18px; }
label { display: block; font-weight: 700; margin-bottom: 10px; }
textarea { width: 100%; min-height: 190px; padding: 16px; border: 1px solid #9ba7a6; border-radius: 8px; background: #fff; color: inherit; font: inherit; font-size: 1rem; line-height: 1.8; resize: vertical; }
textarea:focus-visible { outline: 3px solid #c5d59d; outline-offset: 2px; }
button { display: inline-block; margin-top: 16px; padding: 10px 18px; border: 0; border-radius: 8px; background: #365c44; color: #fff; font: inherit; font-weight: 700; cursor: pointer; }
button:focus-visible { outline: 3px solid #c5d59d; outline-offset: 3px; }
button:disabled { opacity: .6; cursor: wait; }
.hint { color: #52606b; font-size: .88rem; line-height: 1.8; margin: 12px 0 0; }
.summary { font-weight: 700; margin: 0 0 18px; }
.sentence-list { display: grid; gap: 12px; list-style: none; margin: 0; padding: 0; }
.sentence { background: #f7f8f5; border: 1px solid #dce3db; border-radius: 10px; padding: 16px 18px; }
.sentence.candidate { background: #fff7ef; border-color: #dfb28b; }
.sentence-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; color: #52606b; font-size: .85rem; font-weight: 700; }
.badge { background: #9b4d18; color: #fff; border-radius: 100px; padding: 3px 10px; }
.sentence p { margin: 10px 0 0; overflow-wrap: anywhere; white-space: pre-wrap; line-height: 1.8; }
.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
h3 { font-size: 1.1rem; margin: 0 0 10px; }
.guide article > p { line-height: 1.8; }
.example-label { color: #5d6f44; font-size: .84rem; font-weight: 700; margin: 18px 0 6px; }
blockquote { background: #f7f5ef; border-left: 3px solid #aeb893; line-height: 1.8; margin: 0; padding: 12px 14px; }
footer { color: #60707b; font-size: .83rem; padding: 8px 4px; }
@media (max-width: 680px) { .shell { padding-top: 28px; } .guide-grid { grid-template-columns: 1fr; gap: 30px; } }