:root{color-scheme:light;--ink:#17342d;--muted:#566d63;--green:#176b5b;--mint:#e9f5ee;--line:#d5e6dc;--paper:#f8faf7;--focus:#175cd3}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Hiragino Sans","Yu Gothic","Noto Sans JP",sans-serif}button,input,select{font:inherit}a{color:var(--green)}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip-link{position:absolute;top:-5rem;left:1rem;background:#fff;padding:.6rem 1rem;z-index:10}.skip-link:focus{top:1rem}.wrap,.header-inner{width:min(1120px,calc(100% - 36px));margin:auto}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{min-height:74px;display:flex;align-items:center;gap:25px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);white-space:nowrap}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:11px;background:var(--green);color:#fff;font-weight:900}.brand strong,.brand small{display:block;line-height:1.2}.brand small{color:var(--muted);font-size:12px}.header-inner nav{margin-left:auto;display:flex;gap:20px}.header-inner nav a{font-size:14px;font-weight:800;text-decoration:none}.prototype-tag{border:1px solid var(--line);border-radius:999px;padding:4px 10px;color:var(--muted);font-size:11px;font-weight:900;white-space:nowrap}.hero{background:radial-gradient(circle at 80% 10%,#cfe8da,transparent 42%),linear-gradient(110deg,#f5fbf5,#eaf5ed);border-bottom:1px solid var(--line)}.hero-inner{display:flex;justify-content:space-between;align-items:center;gap:35px;padding:53px 0}.eyebrow{margin:0 0 10px;font-size:12px;letter-spacing:.16em;color:var(--green);font-weight:900}.hero h1{margin:0;font-size:clamp(36px,4.8vw,56px);line-height:1.2}.hero p:last-child{max-width:650px;color:#435b51}.hero-count{min-width:190px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:16px;text-align:center}.hero-count strong{display:block;color:var(--green);font-size:34px;line-height:1.25}.hero-count span{font-size:13px;color:var(--muted)}.guide{margin:32px 0;padding:18px 22px;background:#fff;border:1px solid var(--line);border-left:5px solid var(--green);border-radius:11px}.guide p{margin:5px 0;font-size:15px}.work{margin:42px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px}.section-head h2,.rules h2{margin:0;font-size:29px}.section-head a{font-size:15px;font-weight:800}.filters{display:flex;align-items:end;flex-wrap:wrap;gap:12px;margin:22px 0 12px}.filters label{display:grid;gap:5px;font-size:14px;font-weight:800}.filters input,.filters select{min-height:48px;padding:8px 12px;border:1px solid #9fc2ad;border-radius:9px;background:#fff;color:var(--ink)}.filters input{width:min(270px,75vw)}.filters select{min-width:145px}.filters button{min-height:48px;padding:8px 14px;border:1px solid var(--green);border-radius:9px;background:#fff;color:var(--green);font-size:14px;font-weight:800}.filters button:hover{background:var(--mint)}#result-count{margin:9px 0 14px;color:var(--muted);font-size:14px}.detail{margin-bottom:24px;padding:20px 24px;border:1px solid var(--line);border-radius:16px;background:#fff;min-height:85px}.detail p{margin:0}.detail-head{display:flex;align-items:baseline;flex-wrap:wrap;gap:15px}.detail-head strong{font-size:38px;color:var(--green);line-height:1.2}.detail-head span{font-size:15px;color:var(--muted)}.tone-forms{display:flex;flex-wrap:wrap;gap:8px;margin:15px 0}.tone-forms span{display:grid;place-items:center;min-width:68px;padding:8px;border-radius:9px;background:var(--mint);font-size:23px;font-weight:800}.detail-note{color:var(--muted);font-size:14px}.group-block{margin:30px 0}.group-block h3{font-size:22px;margin:0 0 4px}.group-block>p{font-size:14px;color:var(--muted);margin:0 0 12px}.final-row{display:grid;grid-template-columns:105px 1fr;gap:15px;align-items:start;padding:13px 16px;margin:8px 0;background:#fff;border:1px solid var(--line);border-radius:12px}.final-name{padding-top:6px;font-size:24px;font-weight:900;color:var(--green)}.syllables{display:flex;flex-wrap:wrap;gap:7px}.syllables button{min-width:63px;min-height:45px;padding:7px 10px;border:1px solid #bfd6c8;border-radius:8px;background:#fff;color:var(--ink);font-size:17px;font-weight:800}.syllables button:hover,.syllables button.selected{background:var(--green);border-color:var(--green);color:#fff}.no-results{padding:24px;border:1px dashed var(--line);border-radius:12px;color:var(--muted)}.rules{margin:62px 0 28px}.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:18px}.rule-grid article{background:#fff;border:1px solid var(--line);border-radius:13px;padding:19px}.rule-grid h3{margin:0 0 7px;font-size:19px}.rule-grid p{margin:0;font-size:15px;color:var(--muted)}.source-note{font-size:13px;color:var(--muted);margin-bottom:55px}footer{border-top:1px solid var(--line);padding:23px max(18px,calc((100% - 1120px)/2));display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px}
@media(max-width:700px){.header-inner{gap:10px}.header-inner nav{gap:10px}.prototype-tag{display:none}.hero-inner{display:block;padding:36px 0}.hero-count{display:inline-block;margin-top:12px}.rule-grid{grid-template-columns:1fr}.final-row{grid-template-columns:68px 1fr;gap:7px;padding:10px}.final-name{font-size:20px}.syllables button{min-width:57px}.filters label:first-child{width:100%}.filters input{width:100%}}@media(max-width:440px){.header-inner nav{flex-direction:column;gap:0}.header-inner nav a{font-size:12px}.brand small{font-size:10px}.section-head{display:block}.final-row{display:block}.final-name{display:block;padding:0 0 7px}.hero h1{font-size:36px}footer{display:block}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Reviewed single-syllable audio: available and unavailable tones are distinct. */
.tone-forms button{display:grid;gap:4px;place-items:center;min-width:80px;min-height:72px;padding:8px 12px;border:1px solid #bfd6c8;border-radius:9px;background:var(--mint);color:var(--ink);cursor:pointer;font:inherit}.tone-forms strong{font-size:23px;font-weight:800}.tone-forms small{font-size:12px;font-weight:600}.tone-forms button:hover:not(:disabled),.tone-forms button.is-playing{background:var(--green);border-color:var(--green);color:#fff}.tone-forms button:disabled{background:#f5f6f5;border-color:#d7e0db;color:#66736f;cursor:default}.audio-status{color:var(--green);font-size:14px;margin-bottom:8px!important}