:root{--ink:#263044;--muted:#657086;--paper:#fff8ed;--card:#fff;--line:#eadfce;--pink:#f46f93;--blue:#5b8def;--green:#4dbf91;--amber:#f6b84c;--shadow:0 20px 60px rgba(38,48,68,.14)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:radial-gradient(circle at 10% 10%,#ffd3df 0,transparent 28rem),radial-gradient(circle at 90% 0,#d9e5ff 0,transparent 24rem),var(--paper)}button,a{font:inherit}.app-header{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;gap:1rem;align-items:center;padding:1rem clamp(1rem,4vw,4rem);background:rgba(255,248,237,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:.7rem;font-weight:900;text-decoration:none;color:var(--ink)}.brand span{display:grid;place-items:center;width:2.6rem;height:2.6rem;border-radius:16px;background:linear-gradient(135deg,var(--pink),#9b7bff);color:#fff;font-size:1.5rem}.app-header nav{display:flex;gap:1rem;flex-wrap:wrap}.app-header nav a{color:var(--muted);font-weight:800;text-decoration:none}main{width:min(1180px,calc(100% - 2rem));margin:auto}.hero{min-height:74vh;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.6fr);gap:2rem;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.12em;color:var(--pink);font-size:.78rem;font-weight:900}.hero h1{font-size:clamp(2.4rem,7vw,5.7rem);line-height:.95;margin:.3rem 0 1rem}.lead{font-size:1.16rem;line-height:1.8;color:var(--muted);max-width:62ch}.actions{display:flex;gap:1rem;flex-wrap:wrap;margin-top:1.6rem}.primary,.ghost,.sound,.stage-tabs button,.choice,.kana-strip button{border:0;border-radius:999px;padding:.9rem 1.25rem;font-weight:900;cursor:pointer}.primary{background:var(--ink);color:#fff;text-decoration:none}.ghost{background:#fff;color:var(--ink);box-shadow:var(--shadow)}.today-card,.panel,.character-card,.exercise-card{background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:32px;padding:1.4rem;box-shadow:var(--shadow)}.today-card h2{font-size:2rem}.meters{display:grid;gap:.8rem}.meters span{display:flex;justify-content:space-between;padding:.85rem 1rem;background:#fff7fb;border-radius:18px}.section{padding:4rem 0}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.wide{grid-column:1/-1}pre{overflow:auto;background:#273044;color:#fff;border-radius:18px;padding:1rem}.flow{display:flex;gap:.75rem;flex-wrap:wrap;padding:0;list-style:none}.flow li{background:#fff1d7;padding:.6rem .9rem;border-radius:999px;font-weight:800}.section-title{text-align:center;max-width:720px;margin:0 auto 2rem}.kana-strip{display:flex;justify-content:center;gap:.8rem;flex-wrap:wrap;margin-bottom:1.5rem}.kana-strip button{width:4.2rem;height:4.2rem;background:#fff;border:2px solid var(--line);font-size:2rem}.kana-strip button.active{border-color:var(--pink);background:#fff0f5}.learning-shell{display:grid;grid-template-columns:330px 1fr;gap:1rem}.big-kana{font-size:10rem;line-height:1;text-align:center;font-family:"Hiragino Mincho ProN","Yu Mincho",serif}.sound{background:var(--blue);color:#fff}.stage-tabs{display:flex;gap:.6rem;flex-wrap:wrap;margin-bottom:1rem}.stage-tabs button{background:#f2f5fb}.stage-tabs button.active{background:var(--pink);color:#fff}.prompt{font-size:1.35rem;font-weight:900}.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin:1rem 0}.choice{background:#fff;border:2px solid var(--line);font-size:1.2rem}.choice.kana{font-size:2.6rem}.choice.correct{border-color:var(--green);background:#eafaf3}.choice.wrong{border-color:var(--pink);background:#fff0f5}.feedback{min-height:1.8rem;font-weight:900}.writing-pad{height:220px;border:3px dashed #d9cbb6;border-radius:24px;background:linear-gradient(90deg,transparent 49%,#eee 50%,transparent 51%),linear-gradient(transparent 49%,#eee 50%,transparent 51%),#fff;display:grid;place-items:center;color:var(--muted);text-align:center}.stroke-demo{font-size:5rem;animation:pulse 1.8s infinite}@keyframes pulse{50%{transform:scale(1.08);color:var(--pink)}}.table-wrap{overflow:auto;background:#fff;border-radius:28px;box-shadow:var(--shadow)}table{width:100%;border-collapse:collapse}th,td{padding:1rem;border-bottom:1px solid var(--line);text-align:left}th{color:var(--muted)}.badge{display:inline-block;border-radius:999px;padding:.35rem .65rem;font-weight:900;background:#f2f5fb}.mastered{background:#eafaf3;color:#167452}.learning{background:#fff1d7;color:#8a5a00}.not_started{background:#f2f5fb;color:var(--muted)}footer{text-align:center;padding:2rem;color:var(--muted)}@media(max-width:820px){.hero,.grid-2,.grid-3,.learning-shell{grid-template-columns:1fr}.app-header{align-items:flex-start;flex-direction:column}.big-kana{font-size:7rem}.choices{grid-template-columns:1fr}}