@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&family=Manrope:wght@400;500;600;700&display=swap');
:root{--ink:#17211c;--muted:#667069;--paper:#f7f8f4;--card:#fff;--line:#dfe4dd;--accent:#2f6b4f;--soft:#e9f2ec;--bad:#8e3d35}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Manrope,Arial,sans-serif}a{color:inherit;text-decoration:none}header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 5vw;border-bottom:1px solid var(--line);background:rgba(247,248,244,.95);position:sticky;top:0;z-index:10}.brand{font-family:'Noto Sans SC';font-size:28px;font-weight:700;display:flex;gap:12px;align-items:center}.brand span{font:600 14px Manrope;letter-spacing:.05em}nav{display:flex;gap:24px;align-items:center;font-size:14px}nav form{display:inline}.linkbtn{border:0;background:none;font:inherit;cursor:pointer}main{max-width:1380px;margin:auto;padding:44px 5vw 80px}.hero{min-height:68vh;display:grid;grid-template-columns:1.3fr .7fr;align-items:center;gap:6vw}.hero h1{font-size:clamp(44px,6vw,84px);line-height:1.02;max-width:900px;margin:.2em 0}.hero p{font-size:20px;line-height:1.6;max-width:720px;color:var(--muted)}.hero-char{font:500 clamp(180px,27vw,400px) 'Noto Sans SC';text-align:center;color:var(--accent)}.eyebrow{letter-spacing:.18em;font-size:12px;font-weight:700;color:var(--accent)}.actions{display:flex;gap:14px;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;border:0;border-radius:12px;padding:14px 20px;font-weight:700;cursor:pointer}.button.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}.grid3,.cards,.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid3 article,.cards a,.stats article{background:var(--card);padding:28px;border:1px solid var(--line);border-radius:18px}.grid3 b{color:var(--accent)}.pagehead{display:flex;align-items:end;justify-content:space-between;margin-bottom:34px}.pagehead h1,.formpage h1,.auth h1,.legal h1{font-size:44px;margin:.15em 0}.pagehead p,.formpage p{color:var(--muted);max-width:760px}.stats{grid-template-columns:repeat(4,1fr);margin:25px 0}.stats strong{display:block;font-size:36px}.stats span{color:var(--muted)}.cards a{min-height:150px}.auth,.formpage,.legal{max-width:760px;margin:50px auto;background:#fff;border:1px solid var(--line);padding:38px;border-radius:20px}.formpage.wide{max-width:980px}form label{display:block;font-weight:600;margin:18px 0}input,textarea,select{width:100%;margin-top:7px;border:1px solid var(--line);border-radius:10px;padding:13px 14px;background:#fff;font:inherit}textarea{resize:vertical}.flash{padding:14px 18px;border-radius:10px;background:var(--soft);margin-bottom:20px}.flash.bad,.feedback.bad{background:#f5e7e5;color:var(--bad)}.notice{padding:16px;border:1px solid var(--line);border-radius:10px;margin:16px 0;display:flex;flex-direction:column}.table{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.tr{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;padding:15px 20px;border-bottom:1px solid var(--line);align-items:center}.tr:last-child{border:0}.tr.th{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--muted)}.table-char{font:28px 'Noto Sans SC'}.form-inline{margin-bottom:25px}.form-inline form{display:grid;grid-template-columns:1fr 1fr 1.2fr auto;gap:10px}.form-inline input,.form-inline select{margin:0}.vocab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}.vocab-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px;position:relative}.vchar{font:72px 'Noto Sans SC';text-align:center}.freq{position:absolute;right:14px;top:12px;color:var(--muted);font-size:12px}.vocab-card button{width:100%;padding:9px;margin-top:8px}.learn-top{display:flex;justify-content:space-between;align-items:center}.switches{display:flex;gap:5px;background:#fff;border:1px solid var(--line);padding:4px;border-radius:10px}.switches a{padding:8px 11px;border-radius:7px;font-size:13px}.switches a.on{background:var(--soft);color:var(--accent);font-weight:700}.trainer{text-align:center;padding-top:24px}.prompt-label{font-size:15px;color:var(--muted)}.giant-char{font:500 clamp(240px,45vh,520px)/1 'Noto Sans SC';margin:1vh 0 3vh}.giant-german{font-size:clamp(60px,12vw,150px);font-weight:700;margin:13vh 0 10vh}.trainer form{max-width:850px;margin:auto}.answer{font-size:26px;text-align:center;padding:18px}.submit{margin-top:15px;min-width:220px}.choice-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:8px}.choice-grid button{font:34px 'Noto Sans SC';height:64px;border:1px solid var(--line);background:#fff;border-radius:9px;cursor:pointer}.choice-grid button:hover{background:var(--soft)}.feedback{max-width:680px;margin:15px auto;padding:12px 18px;border-radius:12px;background:var(--soft);display:flex;gap:14px;align-items:center;justify-content:center}.mini-char{font:32px 'Noto Sans SC'}.empty{text-align:center;padding:15vh 0}.cookie{position:fixed;bottom:16px;left:50%;transform:translateX(-50%);background:#17211c;color:#fff;padding:13px 16px;border-radius:12px;display:flex;align-items:center;gap:16px;z-index:99;box-shadow:0 8px 30px #0003}.cookie span{font-size:13px}.cookie button{border:0;border-radius:8px;padding:8px 11px}footer{padding:26px 5vw;display:flex;gap:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}footer span{margin-right:auto}code{background:#eee;padding:2px 5px;border-radius:4px}@media(max-width:900px){header{height:auto;padding:14px 5vw;align-items:flex-start}.brand span{display:none}nav{gap:10px;flex-wrap:wrap;justify-content:flex-end}.hero{grid-template-columns:1fr}.hero-char{display:none}.grid3,.cards,.stats{grid-template-columns:1fr 1fr}.choice-grid{grid-template-columns:repeat(5,1fr)}.learn-top{gap:10px;flex-wrap:wrap}.tr{grid-template-columns:1.5fr 1fr 1fr}.tr span:last-child{display:none}}@media(max-width:560px){main{padding:25px 4vw 70px}.hero h1{font-size:42px}.grid3,.cards,.stats{grid-template-columns:1fr}.pagehead{align-items:flex-start;gap:20px;flex-direction:column}.form-inline form{grid-template-columns:1fr}.giant-char{font-size:55vw}.choice-grid{grid-template-columns:repeat(4,1fr)}.switches a{font-size:11px;padding:7px}.cookie{width:92%;flex-wrap:wrap}.tr{grid-template-columns:1fr 1fr}.tr span:nth-child(3),.tr span:nth-child(4){display:none}}

/* V0.1.4 compact interface */
main{max-width:1280px;padding-top:28px}
.hero{min-height:44vh;grid-template-columns:1.15fr .85fr;gap:4vw;padding:12px 0 26px}
.hero h1{font-size:clamp(28px,3vw,42px);line-height:1.1;max-width:690px;margin:.35em 0}
.hero p{font-size:16px;line-height:1.55;max-width:680px}
.hero-char{font-size:clamp(150px,19vw,280px)}
.actions{margin-top:22px}.grid3 article,.cards a,.stats article{padding:20px}.grid3 h2,.cards h2{font-size:20px}.grid3 p,.cards p{font-size:14px}
.pagehead h1,.formpage h1,.auth h1,.legal h1{font-size:clamp(28px,3vw,38px)}
.pagehead{margin-bottom:24px}.pagehead p,.formpage p,.auth p{font-size:15px}
.auth{max-width:560px;margin:28px auto;padding:28px}.auth label{margin:14px 0}.auth input{padding:11px 12px}
.cards a{min-height:118px}.stats strong{font-size:30px}
.empty{padding:9vh 0}.compact-empty{max-width:720px;margin:auto}.compact-empty h1{font-size:32px}.compact-empty p{font-size:16px;color:var(--muted)}
.cookie{width:min(760px,calc(100% - 32px));justify-content:space-between;padding:16px 18px}.cookie>div{display:flex;flex-direction:column;gap:4px}.cookie strong{font-size:14px}.cookie span{line-height:1.45}.cookie button{cursor:pointer;white-space:nowrap}
@media(max-width:900px){.hero{min-height:auto}.hero h1{font-size:34px}}
@media(max-width:560px){.hero h1{font-size:30px}.auth{margin:12px auto;padding:22px}.compact-empty h1{font-size:26px}.cookie{align-items:flex-start}.cookie button{width:100%}}
.speech-switch{display:flex!important;align-items:center;gap:8px;margin:0!important;font-size:13px;font-weight:600;white-space:nowrap}.speech-switch input{width:auto;margin:0}.giant-char{cursor:pointer}.giant-char:active{opacity:.75}

/* V0.3.0 didactic introduction before practice */
.intro-card{max-width:900px;margin:24px auto 0;text-align:center}.intro-progress{font-size:13px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}.intro-char{font:500 clamp(190px,38vh,410px)/1 'Noto Sans SC';color:var(--ink);margin:8px 0 12px;cursor:pointer}.intro-details{display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:680px;margin:0 auto 18px}.intro-details>div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px}.intro-details span{display:block;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em}.intro-details strong{display:block;font-size:24px;margin-top:5px}.intro-examples{max-width:680px;margin:18px auto;text-align:left;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 20px}.intro-examples h2{font-size:15px;margin:0 0 10px}.intro-examples>div{display:grid;grid-template-columns:100px 160px 1fr;gap:12px;padding:8px 0;border-top:1px solid var(--line);align-items:center}.intro-examples b{font:26px 'Noto Sans SC'}.intro-examples span{font-size:14px}.intro-hint{color:var(--muted);font-size:14px}.intro-actions{margin-top:18px}.practice-footer{margin-top:18px;font-size:13px;color:var(--muted)}
@media(max-width:560px){.intro-char{font-size:52vw}.intro-details{grid-template-columns:1fr}.intro-examples>div{grid-template-columns:70px 1fr}.intro-examples>div span:last-child{grid-column:1/-1}.intro-details strong{font-size:20px}}