:root{
  --washi:#f5efe0; --card:#fffaf0; --ink:#2b2a28; --muted:#6f665c;
  --ai:#1f3a5f; --shu:#b23a48; --kin:#c9a227; --matcha:#7a9a6d; --bad:#a83232;
  --line:#e3d8c3; --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--washi);color:var(--ink);font-family:-apple-system,"Noto Serif TC","Noto Serif JP","Hiragino Mincho ProN","PingFang TC",serif;line-height:1.55}
body{min-height:100dvh;display:flex;flex-direction:column;max-width:100vw;overflow-x:hidden;
  background-color:var(--washi);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='40' viewBox='0 0 80 40'%3E%3Cg fill='none' stroke='%231f3a5f' stroke-opacity='.07' stroke-width='1.2'%3E%3Cpath d='M0 40a40 40 0 0 1 80 0M8 40a32 32 0 0 1 64 0M16 40a24 24 0 0 1 48 0M24 40a16 16 0 0 1 32 0M32 40a8 8 0 0 1 16 0'/%3E%3Cpath d='M-40 20a40 40 0 0 1 80 0M-32 20a32 32 0 0 1 64 0M-24 20a24 24 0 0 1 48 0M-16 20a16 16 0 0 1 32 0M-8 20a8 8 0 0 1 16 0'/%3E%3Cpath d='M40 20a40 40 0 0 1 80 0M48 20a32 32 0 0 1 64 0M56 20a24 24 0 0 1 48 0M64 20a16 16 0 0 1 32 0M72 20a8 8 0 0 1 16 0'/%3E%3C/g%3E%3C/svg%3E")}
a{color:var(--shu);text-decoration:none}
.top{display:flex;align-items:center;justify-content:space-between;padding:calc(4px + env(safe-area-inset-top)) 16px 4px;background:var(--ai);color:#fff;position:sticky;top:0;z-index:5;box-shadow:0 2px 0 var(--kin)}
.brand{font-weight:700;font-size:19px;color:#fff;letter-spacing:.08em;display:flex;align-items:center;gap:8px}
.brand::before{content:"道";display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;background:var(--shu);border-radius:4px;font-size:14px;font-weight:700}
.top nav{display:flex}
.top nav a{display:inline-flex;align-items:center;min-height:44px;min-width:44px;justify-content:center;padding:0 8px;margin-left:4px;font-size:14px;color:#e9e2d0}
main{flex:1;width:100%;max-width:640px;margin:0 auto;padding:16px}
.foot{text-align:center;font-size:12px;color:var(--muted);padding:16px 16px calc(16px + env(safe-area-inset-bottom));letter-spacing:.05em}
h1{font-size:22px;margin:8px 0 4px;letter-spacing:.06em}
h1::before{content:"";display:inline-block;width:6px;height:20px;background:var(--shu);margin-right:10px;vertical-align:-3px;border-radius:2px}
h2{font-size:17px;margin:16px 0 8px}
p{margin:6px 0}
.muted{color:var(--muted);font-size:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:12px 0;box-shadow:0 1px 0 rgba(31,58,95,.06)}
.card.hero{text-align:center}
.guide{display:block;margin:0 auto 8px;width:160px;height:160px;object-fit:cover;object-position:top;border-radius:50%;background:#efe6d2;border:3px solid var(--kin);box-shadow:0 0 0 3px #fff8e6,0 4px 10px rgba(31,58,95,.15)}
.btn{display:inline-block;border:0;border-radius:10px;padding:12px 18px;font-size:16px;background:var(--shu);color:#fff;cursor:pointer;font-family:inherit;letter-spacing:.05em}
.btn.sec{background:#fff;color:var(--ai);border:1px solid var(--ai)}
.btn.sm{padding:10px 14px;font-size:15px;min-height:44px}
.btn.danger{background:#fff;color:var(--bad);border:1px solid var(--bad)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:8px 0}
.level{display:flex;gap:12px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;color:var(--ink);margin:10px 0}
.level.locked{opacity:.8}
.level.locked .avatar{filter:grayscale(1) contrast(.5) opacity(.55)}
.level .lock{font-size:12px;color:var(--muted);font-weight:400;white-space:nowrap}
.level .avatar{width:56px;height:56px;border-radius:50%;object-fit:cover;object-position:top;background:#efe6d2;border:2px solid var(--kin);box-shadow:0 0 0 2px #fff8e6;flex:none}
.lv-body{flex:1;min-width:0}
.level .name{font-weight:700}
.bar{height:8px;background:#e8dfc9;border-radius:8px;overflow:hidden;margin-top:8px}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--matcha),var(--kin))}
.flash{min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;user-select:none;
  border:2px solid var(--ai);position:relative}
.flash::after{content:"印";position:absolute;right:12px;bottom:10px;width:26px;height:26px;border:2px solid var(--shu);color:var(--shu);border-radius:4px;font-size:13px;display:flex;align-items:center;justify-content:center;opacity:.6}
.big{font-size:84px;line-height:1.1;font-weight:500}
.mid{font-size:30px}
.q{font-size:36px;text-align:center;margin:12px 0;word-break:break-all}
.q.jp{font-size:44px}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.choice{background:#fff;border:2px solid var(--line);border-radius:12px;padding:16px 8px;font-size:22px;text-align:center;cursor:pointer;font-family:inherit;color:var(--ink);overflow-wrap:anywhere}
.choice.jp{font-size:28px}
.choice.ok{border-color:var(--matcha);background:#eef4ea}
.choice.bad{border-color:var(--bad);background:#f8e6e3}
input.type{width:100%;font-size:24px;padding:12px;border:2px solid var(--line);border-radius:12px;text-align:center;font-family:inherit;background:#fff}
.stat{display:flex;justify-content:space-between;font-size:14px;color:var(--muted);margin-bottom:8px}
.pill{display:inline-block;background:#ece3cf;border-radius:999px;padding:2px 10px;font-size:12px;color:var(--ai);margin-right:6px}
.reason{font-size:12px;color:var(--shu)}
textarea{width:100%;min-height:90px;font-family:monospace;font-size:12px;border:1px solid var(--line);border-radius:10px;padding:8px;background:#fff}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translateX(-50%);background:var(--ai);color:#fff;padding:10px 16px;border-radius:999px;font-size:14px;opacity:0;transition:opacity .2s;pointer-events:none;z-index:9}
.toast.show{opacity:1}
label.chk{display:flex;gap:8px;align-items:center;margin:8px 0}
@media (max-width:380px){.big{font-size:64px}.q{font-size:30px}.q.jp{font-size:38px}.choice{font-size:18px}.choice.jp{font-size:24px}.guide{width:130px;height:130px}}

@media (min-width:900px){main{max-width:820px}.choices{grid-template-columns:repeat(4,1fr)}.level{width:calc(50% - 6px);display:inline-flex;vertical-align:top;margin:5px 3px}}

/* ---- 第三波：首頁／結算／解說／假名帖 ---- */
.greet{line-height:1.6}
.btn.cta{display:block;width:100%;font-size:18px;padding:14px 18px;margin:10px 0 6px;text-align:center}
.links{margin:4px 0 0}
.links a{display:inline-block;padding:8px 4px;min-height:44px;line-height:28px}
.status{font-size:14px;color:var(--ai);background:#fff8e6;border:1px dashed var(--kin);border-radius:10px;padding:8px 12px;margin:10px 0;text-align:center;line-height:1.7}
.card.note{border-left:4px solid var(--kin);background:#fff8e6}
.leave{font-size:13px;color:var(--muted);margin-left:10px;padding:8px 4px;display:inline-block}
.kana-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:6px}
.kc{position:relative;display:flex;align-items:center;justify-content:center;aspect-ratio:1;font-size:20px;border-radius:8px;border:1px solid var(--line);background:#ede6d6;color:#a39b8c}
.kc.b1{background:#e4efd9;color:var(--ink);border-color:#c5d8b6}
.kc.b3{background:#c4dbb0;color:var(--ink);border-color:var(--matcha);font-weight:600}
.kc.b3::after{content:"印";position:absolute;right:2px;bottom:1px;font-size:9px;line-height:1;color:#fff;background:var(--shu);border-radius:2px;padding:1px 2px}
.legend .kc{display:inline-flex;width:24px;height:24px;aspect-ratio:auto;font-size:11px;vertical-align:middle;margin-right:2px}
.legend .kc.b3::after{display:none}
.bignum{font-size:56px;font-weight:600;line-height:1.1;color:var(--ai);letter-spacing:.02em}
.bignum small{font-size:20px;color:var(--muted);font-weight:400}
.summary{text-align:center}
.summary h1{display:block}
.summary .card.wrong{text-align:left;padding:10px 14px;margin:6px 0}
.tiles{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:12px 0}
.tile{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:8px 2px}
.tile b{display:block;font-size:22px;color:var(--ai);line-height:1.2}
.tile span{font-size:11px;color:var(--muted);white-space:nowrap}
.summary .row{justify-content:center}
.card.explain{border-left:4px solid var(--shu);background:#fff7f0;text-align:center;margin-top:14px}
.card.explain .big{font-size:64px}
.card.explain .btn{margin:6px 4px 0}
.confuse{color:var(--shu);font-size:15px;margin-top:4px}
.btn.next{display:block;width:100%;margin-top:10px}
.overlay{position:fixed;inset:0;background:rgba(43,42,40,.72);display:flex;align-items:center;justify-content:center;z-index:20;padding:16px}
.overlay .card{max-width:340px;width:100%;border:2px solid var(--kin)}
.overlay h2{margin:8px 0 4px;color:var(--shu);font-size:22px;letter-spacing:.12em}
select{font-family:inherit;font-size:16px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;min-height:44px}
@media (max-width:380px){.tiles{grid-template-columns:repeat(5,1fr)}.tile b{font-size:18px}.tile span{font-size:10px}.kana-grid{grid-template-columns:repeat(auto-fill,minmax(38px,1fr))}.kc{font-size:17px}}