:root{color-scheme:light;--bg:#eef1f4;--ink:#17191d;--muted:#626872;--panel:#fff;--line:#d9dee5;--accent:#c61f2b;--accent-dark:#a51520;--accent-soft:#fff0f1;--expression:#6741a5;--expression-bg:#f3effa;--noun:#2366a8;--noun-bg:#eef6fd;--particle:#c61f2b;--particle-bg:#fff0f1;--verb:#247451;--verb-bg:#edf8f2;--panel-strong:#ffffff;--shadow:0 20px 50px rgba(26,31,39,.1)}
*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;font-family:"Avenir Next",Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit}.seo-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px max(22px,env(safe-area-inset-right,0px)) 14px max(22px,env(safe-area-inset-left,0px));border-top:4px solid var(--accent);border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);backdrop-filter:blur(14px)}.seo-brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:900;color:var(--accent);text-transform:uppercase;letter-spacing:.08em}.seo-brand img{width:74px;height:auto;display:block}.seo-header nav{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:8px}.seo-header nav a{padding:8px 10px;border-radius:6px;text-decoration:none;color:var(--muted);font-weight:750}.seo-header nav a:hover{background:var(--accent-soft);color:var(--accent-dark)}.seo-header .nav-app{background:var(--accent);color:#fff}.seo-header .nav-app:hover{background:var(--accent-dark);color:#fff}main{width:min(1120px,100%);margin:0 auto;padding:36px 22px 60px}.hero{display:grid;grid-template-columns:minmax(0,860px);justify-content:center;gap:24px;padding:54px 0 38px}.hero h1,.page-hero h1,.article h1{margin:0;color:var(--ink);font-size:clamp(1.9rem,4.5vw,3.45rem);line-height:1.08;letter-spacing:0}.hero p,.page-hero p,.lede{font-size:1.12rem;color:var(--muted);max-width:100%}.eyebrow{margin:0 0 10px;color:var(--accent);font-size:.82rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 16px;border:1px solid var(--line);border-radius:6px;background:#fff;text-decoration:none;font-weight:850}.button.primary{border-color:var(--accent);background:var(--accent);color:#fff}.section{padding:34px 0}.section h2,.article h2{margin:0 0 12px;font-size:clamp(1.55rem,3vw,2.2rem);line-height:1.15}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}.card,.panel{display:block;padding:20px;border:1px solid var(--line);border-radius:8px;background:var(--panel);box-shadow:0 8px 22px rgba(26,31,39,.06);text-decoration:none}.card h3{margin:0 0 8px;font-size:1.25rem}.card p,.panel p{margin:0;color:var(--muted)}.card.compact h3{font-size:2rem;color:var(--accent)}.split{display:grid;grid-template-columns:1fr minmax(260px,.55fr);gap:20px;align-items:start}.page-hero{padding:42px 0 20px}.article{max-width:980px;margin:0 auto;padding:42px 0}.article ul,.article ol{padding-left:1.3rem}.kana{margin:0 0 6px;color:var(--accent);font-weight:900}.kana.large{font-size:1.45rem}.example-list{display:grid;gap:10px;margin:16px 0}.example-list p{margin:0;padding:14px 16px;border-left:4px solid var(--accent);border-radius:6px;background:#fff;font-size:1.2rem}.compare-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin:18px 0}.seo-footer{display:grid;gap:4px;padding:20px 22px;border-top:1px solid var(--line);background:#fff;color:var(--muted);font-size:.82rem;text-align:center}.seo-footer p{margin:0}@media(max-width:720px){.seo-header{position:static;align-items:flex-start;flex-direction:column;gap:12px}.seo-header nav{justify-content:flex-start}.hero,.split{grid-template-columns:1fr}.hero{padding-top:28px}.seo-brand img{width:60px}main{padding:24px 16px 48px}.card,.panel{padding:16px}}.sample-tabs{display:grid;gap:14px}.sample-tab-buttons{display:flex;flex-wrap:wrap;gap:8px}.sample-tab{min-height:40px;padding:8px 13px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--muted);font:inherit;font-weight:850;cursor:pointer}.sample-tab.active{border-color:var(--accent);background:var(--accent);color:#fff}.example-list p{display:flex;align-items:center;justify-content:space-between;gap:14px}.sample-play{flex:0 0 auto;min-height:36px;padding:7px 11px;border:1px solid var(--accent);border-radius:6px;background:var(--accent-soft);color:var(--accent-dark);font:inherit;font-size:.9rem;font-weight:850;cursor:pointer}.translation{display:block;color:var(--muted);font-size:.95rem;line-height:1.35}.translated-examples p{align-items:flex-start;flex-direction:column}@media(max-width:720px){.example-list p{align-items:flex-start;flex-direction:column}.sample-play{align-self:flex-start}}

ruby{ruby-align:center}rt{font-size:.58em;line-height:1;color:var(--muted);font-weight:700}

.study-demo{display:grid;gap:12px;margin:16px 0 26px;padding:16px;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 8px 22px rgba(26,31,39,.06)}.study-demo-button{justify-self:start;min-height:40px;padding:8px 13px;border:2px solid var(--accent);border-radius:6px;background:#fff;color:var(--accent);font:inherit;font-weight:900;cursor:pointer}.study-demo.active .study-demo-button{background:var(--accent);color:#fff}.study-demo-line{margin:0;font-size:1.22rem;line-height:2}.study-token{appearance:none;border:0;border-radius:999px;background:transparent;color:inherit;font:inherit;padding:2px 5px;transition:background-color .18s,color .18s,box-shadow .18s}.study-demo.active .study-token{cursor:pointer;box-shadow:0 0 0 1px rgba(0,0,0,.06)}.study-demo.active .study-token:hover{box-shadow:0 0 0 2px rgba(198,31,43,.32)}.study-demo.active .study-token.expression{background:#fff2bf;color:#6f5300}.study-demo.active .study-token.noun{background:#eaf4ff;color:#174a7c}.study-demo.active .study-token.particle{background:#ffe5e8;color:var(--accent-dark)}.study-demo.active .study-token.verb{background:#e9f8ee;color:#1d6735}.study-demo-note{display:none;padding:12px 14px;border-left:4px solid var(--accent);border-radius:6px;background:var(--accent-soft);color:var(--accent-dark);font-weight:750}.study-demo.active .study-demo-note{display:block}.study-demo-popup{display:grid;gap:8px;padding:14px;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 12px 28px rgba(26,31,39,.1)}.study-popup-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.study-popup-type{margin:0;color:var(--accent);font-size:.78rem;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.study-popup-close{width:32px;height:32px;border:1px solid var(--accent);border-radius:6px;background:var(--accent);color:#fff;font:inherit;font-weight:900;cursor:pointer}.study-demo-popup h3{margin:0;font-size:1.35rem}.study-demo-popup p{margin:0;color:var(--muted)}

.article>.lede{max-width:100%}.study-demo-line{line-height:2.25}.study-demo.active .study-token.expression{padding:.04em .28em;border-radius:0;background:var(--expression-bg);color:var(--expression);font-weight:800;box-shadow:inset 0 -.14em 0 rgba(103,65,165,.28)}.study-demo.active .study-token.noun{padding:.05em .26em;border:2px solid var(--noun);border-radius:0;background:var(--noun-bg);color:var(--noun);font-weight:750}.study-demo.active .study-token.particle{display:inline-flex;align-items:center;justify-content:center;min-width:1.72em;height:1.72em;padding:0;border:2px solid var(--particle);border-radius:999px;background:var(--particle-bg);color:var(--particle);font-weight:800;line-height:1}.study-demo.active .study-token.verb{padding:.04em .24em;border-radius:0;border-bottom:.16em solid var(--verb);background:var(--verb-bg);color:var(--verb);font-weight:700}.study-demo-popup{position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:16px;background:rgba(19,23,29,.56);backdrop-filter:blur(3px)}.study-popup-card{width:min(520px,calc(100% - 32px));display:grid;gap:14px;padding:28px;border:1px solid var(--line);border-radius:8px;background:var(--panel-strong);box-shadow:var(--shadow)}.study-popup-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.study-popup-type{margin:0;color:var(--accent);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.study-demo-popup h3{margin:0;color:var(--ink);font-size:2rem;line-height:1.1;white-space:nowrap}.study-demo-popup p{margin:0;color:var(--muted);font-size:1.05rem;line-height:1.6}.study-popup-actions{display:flex;justify-content:flex-end}.study-popup-close{min-height:46px;padding:10px 16px;border:1px solid var(--accent);border-radius:6px;background:var(--accent);color:#fff;font:inherit;font-weight:850;cursor:pointer}
.study-demo-popup .study-popup-type{color:var(--accent);font-size:.78rem;font-weight:800;letter-spacing:.08em;line-height:1.2;text-transform:uppercase}

.study-popup-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px}.study-popup-actions .button{min-height:44px;padding:10px 16px;border-radius:6px;font:inherit;font-weight:850;line-height:1.1;white-space:nowrap;cursor:pointer}.study-popup-actions .study-popup-play{margin-right:auto;border:1px solid var(--line);background:#fff;color:var(--ink)}.study-popup-actions .study-popup-learn{border:1px solid var(--accent);background:#fff;color:var(--accent)}.study-popup-actions .study-popup-close{width:auto;height:auto;min-width:104px;min-height:44px;padding:10px 18px;border:1px solid var(--accent);background:var(--accent);color:#fff}.study-popup-actions [hidden]{display:none!important}.study-popup-learn-panel{display:grid;gap:12px;margin-top:2px;padding:14px;border:1px solid var(--line);border-radius:6px;background:var(--panel);color:var(--ink)}.study-popup-learn-panel[hidden]{display:none!important}.study-popup-learn-panel section{display:grid;gap:5px}.study-popup-learn-panel h4{margin:0;color:var(--ink);font-size:.92rem;letter-spacing:0;text-transform:none}.study-popup-learn-panel p,.study-popup-learn-panel ul{margin:0;color:var(--muted);font-size:.96rem;line-height:1.5}.study-popup-learn-panel ul{padding-left:20px}