:root{--bg: #10101a;--bg2: #1a1a2a;--fg: #f0f0f5;--dim: #8888a0;--accent: #7c6cff;--good: #2ecc71;--bad: #e74c3c;--warn: #f1c40f}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;user-select:none;-webkit-user-select:none}#app{height:100%}.screen{display:flex;flex-direction:column;min-height:100dvh;padding:calc(env(safe-area-inset-top) + 12px) 16px calc(env(safe-area-inset-bottom) + 12px)}header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}h1{font-size:24px;margin:0}button{font:inherit;border:none;border-radius:14px;cursor:pointer;color:var(--fg);background:var(--bg2)}button:disabled{opacity:.4}.ghost{background:transparent;color:var(--dim);padding:10px 14px;font-size:16px}.stats{display:flex;gap:16px;justify-content:center;margin:24px 0}.stat{background:var(--bg2);border-radius:18px;padding:18px 32px;text-align:center}.stat .num{display:block;font-size:44px;font-weight:700}.stat .label{color:var(--dim);font-size:15px}.decks{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}.deck{display:flex;align-items:center;gap:12px;background:var(--bg2);border-radius:14px;padding:16px;font-size:18px;opacity:.55}.deck.on{opacity:1;outline:2px solid var(--accent)}.deck input{width:22px;height:22px}.deck .count{margin-left:auto;color:var(--dim)}.start{background:var(--accent);color:#fff;font-size:34px;font-weight:800;letter-spacing:2px;padding:28px;border-radius:22px;width:100%;margin-top:auto}.hint{color:var(--dim);text-align:center;font-size:14px}.error{color:var(--bad);text-align:center}.session main{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px}.badge{font-size:17px;font-weight:700;letter-spacing:1px;padding:8px 16px;border-radius:999px;background:var(--bg2);color:var(--dim)}.badge.listening{background:var(--accent);color:#fff;animation:pulse 1.2s ease-in-out infinite}.badge.correct{background:var(--good);color:#fff}.badge.reveal{background:var(--bad);color:#fff}.badge.paused{background:var(--warn);color:#222}@keyframes pulse{50%{opacity:.55}}.progress{color:var(--dim);font-size:16px}.word-en{font-size:clamp(34px,9vw,64px);font-weight:800;line-height:1.15}.word-ja .kana{font-size:clamp(40px,11vw,76px);font-weight:700}.word-ja .romaji{font-size:26px;color:var(--accent);margin-top:4px}.word-ja .mora{font-size:22px;color:var(--dim);margin-top:8px}.word-ja.mystery{font-size:70px;color:var(--dim)}.recognized{color:var(--dim);font-size:17px;min-height:22px}.degraded{color:var(--warn);text-align:center;font-size:14px;margin:0}.summary h2{font-size:34px;margin:0 0 10px}.summary p{color:var(--dim);font-size:20px}.controls{display:flex;gap:10px;margin-top:12px}.ctl{flex:1;font-size:21px;font-weight:700;padding:24px 0;border-radius:18px}.ctl.good{background:var(--good);color:#fff}.ctl.bad{background:var(--bad);color:#fff}.mockbar{display:flex;gap:8px;margin-bottom:10px}.mockbar input{flex:1;font-size:16px;padding:10px;border-radius:10px;border:1px solid var(--dim);background:var(--bg2);color:var(--fg)}.settings .row{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--bg2);border-radius:14px;padding:16px;margin-bottom:10px;font-size:17px}.settings input[type=number]{width:70px;font-size:18px;padding:8px;border-radius:8px;border:none;background:var(--bg);color:var(--fg);text-align:center}.settings input[type=checkbox]{width:24px;height:24px}.settings .buttons{justify-content:center}.settings .buttons button{padding:14px 18px;font-size:16px}.debuglog{position:fixed;bottom:0;left:0;right:0;z-index:100;font-size:11px}.debuglog-bar{display:flex;gap:6px;padding:4px 8px;background:#000000d9}.debuglog-bar button{background:#333;color:#9f9;border:none;border-radius:4px;padding:4px 10px;font-size:11px}.debuglog-body{margin:0;padding:8px;max-height:40vh;overflow-y:auto;background:#000000eb;color:#9f9;white-space:pre-wrap;word-break:break-all;user-select:text;-webkit-user-select:text}.word-ja .alts{margin-top:10px;font-size:18px;color:var(--muted, #8a8a9a)}.landing{display:flex;flex-direction:column;justify-content:center;gap:22px;padding:32px 24px;max-width:520px;margin:0 auto;min-height:100vh;box-sizing:border-box}.landing-hero{text-align:center}.landing-hero .logo{font-size:56px;line-height:1}.landing-hero h1{margin:12px 0 4px;font-size:40px}.landing-hero .tagline{margin:0;font-size:18px;color:var(--muted, #9a9aae)}.landing-points{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}.landing-points li{padding-left:28px;position:relative;font-size:16px;line-height:1.4}.landing-points li:before{content:"・";position:absolute;left:6px;color:var(--accent, #7c7cf0)}.landing-auth{display:flex;flex-direction:column;gap:10px;margin-top:8px}.auth-label{margin:0;font-size:15px;color:var(--muted, #9a9aae)}.auth-input{padding:16px;font-size:20px;border-radius:12px;border:1px solid #3a3a4a;background:var(--bg, #16161f);color:var(--fg, #eee);text-align:center}.auth-btn{padding:16px;font-size:18px;font-weight:600;border:none;border-radius:12px;background:var(--accent, #7c7cf0);color:#fff}.auth-btn:disabled{opacity:.6}.auth-link{background:none;border:none;color:var(--muted, #9a9aae);font-size:14px;text-decoration:underline;padding:6px}.auth-link.guest{margin-top:4px}.auth-error{margin:0;color:#ff7676;font-size:14px}.account{border-bottom:1px solid #2a2a36;padding-bottom:12px;margin-bottom:8px}.settings button.danger{background:#3a1a1a;color:#ff8a8a;border:1px solid #5a2a2a}