:root{color:#17211b;background:#f6f4ef;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}.app-shell{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:100vh}.sidebar{display:flex;flex-direction:column;gap:28px;padding:28px 22px;color:#f8fbf6;background:#153b2f}.eyebrow{margin:0 0 7px;color:#4c7c65;font-size:.78rem;font-weight:800;letter-spacing:0;text-transform:uppercase}.sidebar .eyebrow{color:#a8d3ba}h1,h2,h3,p{margin-top:0}h1{margin-bottom:0;font-size:clamp(2rem,5vw,3.2rem);line-height:.98;letter-spacing:0}h2{margin-bottom:0;font-size:clamp(1.7rem,3vw,2.5rem);letter-spacing:0}h3{margin-bottom:12px;font-size:1rem}.mode-list{display:grid;gap:8px}.mode-list button,.quiet-button,.card-actions button,.word-card button{min-height:42px;border:1px solid transparent;border-radius:8px;padding:0 14px;font-weight:800}.mode-list button{color:#eaf7ed;text-align:left;background:#ffffff14}.mode-list button.active{color:#16382d;background:#f5c95e}.progress-panel{margin-top:auto;padding-top:18px;border-top:1px solid rgba(255,255,255,.16)}.progress-top{display:flex;justify-content:space-between;gap:10px;margin-bottom:10px;font-size:.92rem}.progress-track{height:10px;overflow:hidden;border-radius:999px;background:#ffffff29}.progress-track div{height:100%;background:#f5c95e;transition:width .18s ease}.workspace{min-width:0;padding:32px}.study-view{display:grid;gap:24px;max-width:1120px;margin:0 auto}.toolbar{display:flex;align-items:end;justify-content:space-between;gap:16px}.quiet-button,.card-actions button,.word-card button{color:#153b2f;background:#f5c95e}.reader-layout{display:grid;grid-template-columns:minmax(280px,.85fr) minmax(320px,1.15fr);gap:20px;align-items:start}.line-list{display:grid;gap:8px;max-height:calc(100vh - 150px);margin:0;overflow:auto;padding:0;list-style:none}.line-list li{display:grid;grid-template-columns:32px 1fr;gap:10px;align-items:start;border:1px solid #d8ded3;border-radius:8px;padding:12px;background:#fffefa}.line-list li.selected{border-color:#153b2f;background:#eef7ef}.line-list span,.line-number,.flash-card span{color:#6b776e;font-size:.82rem;font-weight:800}.line-list p{margin-bottom:0;line-height:1.55}.focus-line,.prompt-panel,.feedback-panel{border:1px solid #d8ded3;border-radius:8px;padding:24px;background:#fffefa}.japanese-large{margin:12px 0 16px;font-size:clamp(2rem,5vw,4rem);line-height:1.25;letter-spacing:0}.english-line,.feedback-panel p{margin-bottom:0;color:#48514b;font-size:1.18rem;line-height:1.6}.flash-card{display:grid;place-items:center;min-height:360px;border:1px solid #d8ded3;border-radius:8px;padding:28px;color:#17211b;background:#fffefa}.flash-card strong{text-align:center;font-size:clamp(2.6rem,8vw,6rem);letter-spacing:0}.flash-card em{color:#56625a;font-style:normal}.card-actions{display:flex;flex-wrap:wrap;gap:10px}textarea{width:100%;resize:vertical;border:1px solid #cdd6cc;border-radius:8px;padding:14px;color:#17211b;background:#fbfaf6}.sequence-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.sequence-choice{display:block;width:100%;min-height:56px;margin-bottom:10px;border:1px solid #d8ded3;border-radius:8px;padding:12px;color:#17211b;text-align:left;line-height:1.45;background:#fffefa}.selected-choice{border-color:#153b2f;background:#eef7ef}.word-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}.word-card{display:grid;gap:8px;border:1px solid #d8ded3;border-radius:8px;padding:16px;background:#fffefa}.word-card strong{font-size:1.65rem;line-height:1.2}.word-card span{color:#627064}.word-card p{margin-bottom:4px}.empty-state{color:#657168}@media(max-width:820px){.app-shell,.reader-layout,.sequence-grid{grid-template-columns:1fr}.focus-line{order:1;padding:18px}.line-list{order:2}.sidebar{min-height:auto}.workspace{padding:22px}.toolbar{align-items:stretch;flex-direction:column}.line-list{max-height:220px}.japanese-large{margin:8px 0 12px;font-size:clamp(1.6rem,8vw,2.5rem)}}