:root{--bg:#f3efe6;--bg-accent:#e7f0ea;--surface:#fffdf8;--ink:#1c2b24;--muted:#5d6b63;--line:#d5ddd6;--brand:#1f6b4a;--brand-soft:#d8eee3;--danger:#b42318;--ok:#1f6b4a;--shadow:0 10px 30px #1c2b2414;--radius:18px;color:var(--ink);background:radial-gradient(circle at top left, #dff0e6 0%, transparent 40%), radial-gradient(circle at top right, #f7e7d4 0%, transparent 35%), var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font-family:Noto Sans SC,Noto Sans JP,sans-serif;font-weight:400;line-height:1.5}*{box-sizing:border-box}html,body,#app{min-height:100%}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.container{width:min(960px,100% - 2rem);margin:0 auto}.app-shell{flex-direction:column;min-height:100vh;display:flex}.topnav{z-index:20;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#f3efe6e0;position:sticky;top:0}.topnav-inner{justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 0;display:flex}.brand{letter-spacing:.02em;font-size:1.05rem;font-weight:700}.nav-links{flex-wrap:wrap;gap:.35rem;display:flex}.nav-links a{color:var(--muted);border-radius:999px;padding:.45rem .75rem}.nav-links a.router-link-active{background:var(--brand-soft);color:var(--brand);font-weight:600}.main{flex:1;padding:1.5rem 0 3rem}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}.btn{cursor:pointer;background:var(--brand);color:#fff;border:none;border-radius:999px;justify-content:center;align-items:center;gap:.4rem;padding:.7rem 1.2rem;font-weight:600;transition:transform .15s,opacity .15s;display:inline-flex}.btn:hover{transform:translateY(-1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn.secondary{color:var(--ink);border:1px solid var(--line);background:#fff}.btn.ghost{color:var(--brand);border:1px solid var(--brand-soft);background:0 0}.field{flex-direction:column;gap:.35rem;margin-bottom:1rem;display:flex}.field input,.field select{border:1px solid var(--line);background:#fff;border-radius:12px;padding:.7rem .85rem}.muted{color:var(--muted)}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;display:grid}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;display:grid}.progress-bar{background:#e6ebe7;border-radius:999px;height:10px;overflow:hidden}.progress-bar>span{background:linear-gradient(90deg,#1f6b4a,#3d9b72);height:100%;display:block}.tag{background:var(--brand-soft);color:var(--brand);border-radius:999px;align-items:center;padding:.15rem .55rem;font-size:.8rem;display:inline-flex}.word-lemma{font-family:Noto Sans JP,sans-serif;font-size:2rem;font-weight:700;line-height:1.2}.reading{color:var(--muted);font-family:Noto Sans JP,sans-serif}.error{color:var(--danger);margin:.5rem 0}@media (width<=720px){.grid-2,.grid-3{grid-template-columns:1fr}.nav-links{gap:.15rem}.nav-links a{padding:.4rem .55rem;font-size:.9rem}.word-lemma{font-size:1.7rem}}