:root {
  --bg: #f7f0e6;
  --ink: #263e50;
  --accent: #df645a;
  --accent-dark: #b94941;
  --soft: #f6d6c7;
  --card: #fffaf2;
  --muted: #5f7180;
  --green: #287a66;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif; line-height: 1.75; }
a { color: inherit; }
button { font: inherit; }
.site-nav { max-width: 980px; margin: 0 auto; padding: 18px 22px 0; display: flex; justify-content: space-between; gap: 16px; font-weight: 800; }
.site-nav a { text-decoration: none; }
.page { width: min(980px, calc(100% - 28px)); margin: 18px auto 64px; }
.hero { position: relative; overflow: hidden; padding: clamp(30px, 6vw, 64px); border: 4px solid var(--ink); border-radius: 34px; background: var(--card); box-shadow: 0 14px 0 var(--soft); }
.hero::after { content: "ing"; position: absolute; right: -24px; bottom: -76px; color: var(--soft); font: 900 clamp(150px, 30vw, 300px)/1 Georgia, serif; opacity: .65; pointer-events: none; }
.eyebrow { position: relative; z-index: 1; margin: 0 0 8px; color: var(--accent-dark); font-weight: 900; letter-spacing: .08em; }
h1, h2 { font-family: "Yu Mincho", Georgia, serif; line-height: 1.25; }
h1 { position: relative; z-index: 1; max-width: 760px; margin: 0; font-size: clamp(2.2rem, 7vw, 4.5rem); }
.lead { position: relative; z-index: 1; max-width: 720px; margin: 22px 0 0; font-size: clamp(1rem, 2.5vw, 1.25rem); font-weight: 700; }
.formula { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 28px; font-size: clamp(1rem, 3.5vw, 1.55rem); font-weight: 900; }
.formula span { padding: 10px 16px; border-radius: 14px; background: var(--ink); color: var(--card); }
.formula .ing { background: var(--accent-dark); }
.section { margin-top: 44px; }
.section h2 { margin: 0 0 18px; font-size: clamp(1.7rem, 5vw, 2.8rem); }
.video-wrap { overflow: hidden; border: 4px solid var(--ink); border-radius: 28px; background: var(--ink); box-shadow: 0 12px 0 var(--soft); }
video { display: block; width: min(100%, 430px); max-height: 78vh; margin: 0 auto; background: #111; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.compare article { padding: 24px; border: 3px solid var(--ink); border-radius: 22px; background: var(--card); }
.compare h3 { margin-top: 0; color: var(--accent-dark); }
.chunk-example { display: grid; grid-template-columns: 1.2fr 1fr; gap: 8px; margin-top: 18px; padding: 20px; border-radius: 18px; background: var(--ink); color: var(--card); font-size: clamp(1.05rem, 3vw, 1.4rem); font-weight: 900; }
.chunk-example span:first-child { color: #ffd1c5; }
.chunk-example .predicate { border-left: 2px solid rgba(255,255,255,.45); padding-left: 14px; }
.tip { padding: 24px; border-left: 8px solid var(--accent-dark); border-radius: 0 20px 20px 0; background: var(--soft); font-weight: 800; }
.instruction { font-weight: 700; }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0; }
button { border: 0; border-radius: 999px; padding: 12px 18px; background: var(--ink); color: var(--card); font-weight: 900; cursor: pointer; }
button:hover, button:focus-visible { background: var(--accent-dark); outline: 3px solid rgba(185,73,65,.2); outline-offset: 2px; }
.cards { display: grid; gap: 16px; }
.card { padding: 22px; border: 3px solid var(--ink); border-radius: 22px; background: var(--card); }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.number { display: grid; place-items: center; flex: 0 0 42px; height: 42px; border-radius: 50%; background: var(--accent-dark); color: var(--card); font-weight: 900; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.actions button { padding: 9px 14px; }
.listen.playing { background: var(--green); }
.ja { margin: 14px 0; font-size: 1.08rem; font-weight: 800; }
.answer { display: none; margin: 14px 0 0; padding: 16px; border-radius: 16px; background: var(--ink); color: var(--card); font-size: 1.05rem; font-weight: 900; }
.answer.show { display: block; }
.answer em { color: #ffd1c5; font-style: normal; }
.footer { margin-top: 48px; padding: 30px 20px; border-radius: 24px; background: var(--ink); color: var(--card); text-align: center; font-weight: 800; }
@media (max-width: 680px) {
  .site-nav { align-items: flex-start; font-size: .86rem; }
  .hero { border-radius: 24px; }
  .compare, .chunk-example { grid-template-columns: 1fr; }
  .chunk-example .predicate { border-left: 0; border-top: 2px solid rgba(255,255,255,.45); padding: 10px 0 0; }
  .card { padding: 17px; }
  .card-head { align-items: flex-start; }
  .actions { justify-content: flex-end; }
}