@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Nunito:wght@400;600;700;800&display=swap');
:root{--green:#355e48;--ink:#263d33;--muted:#849087;--line:#e6e9df;--cream:#f7f8f2}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font:15px 'DM Sans','Segoe UI',sans-serif}button,input{font:inherit}button,a{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}aside{width:242px;background:#fffef9;position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);padding:40px 23px;display:flex;flex-direction:column}.brand{font-size:25px;letter-spacing:-1px;font-weight:700;text-decoration:none;color:var(--green);position:relative;margin-bottom:64px}.brand>span:first-child{color:#d49b81;font-size:35px;vertical-align:middle;margin-right:7px}.brand-small{display:block;font-size:9px;letter-spacing:4px;margin-left:44px;margin-top:-4px}.nav-label{font-size:10px;letter-spacing:1.8px;color:#9a9e92;margin:0 12px 17px}nav{display:grid;gap:9px}nav button{border:0;background:none;text-align:left;color:#7c857a;padding:14px;border-radius:10px;font-size:19px}nav button span{font-size:13px;margin-left:9px}nav button.active{background:#e9eee2;color:var(--green);font-weight:bold}.side-note{margin-top:auto;background:#f2f3e9;border-radius:14px;padding:20px;font-size:26px}.side-note h3{font-size:13px;margin:12px 0 8px}.side-note p{font-size:12px;line-height:1.8;color:#899080;margin:0}.local{font-size:10px;color:#969e90;margin-top:25px;text-align:center}main{margin-left:242px;padding:0 48px;max-width:1600px}header{height:89px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:11px;letter-spacing:1px;color:#8b9588}header b{font-weight:400;letter-spacing:0;margin-left:13px}header button{border:1px solid var(--line);background:#fffef9;border-radius:30px;font-size:11px;padding:10px 15px;color:var(--green)}.eyebrow{font-size:10px;letter-spacing:2px;color:#8c9c80;text-transform:uppercase;margin:35px 0 10px}h1{font:800 33px 'Nunito',sans-serif;letter-spacing:-.7px;margin:0 0 10px}h2{font-size:19px;margin:0}h3{font-size:16px}p{line-height:1.7}.subtitle{color:#899184;font-size:13px;margin:0 0 27px}.hero{background:#e8eddc;border:1px solid #dde4d2;border-radius:20px;min-height:235px;position:relative;overflow:hidden;display:flex;align-items:center;padding:32px}.hero-copy{position:relative;z-index:1;width:65%}.pill{font-size:10px;display:inline-block;padding:7px 11px;border-radius:30px;background:#ffffffa8;color:#718364;letter-spacing:.7px}.hero h2{font:800 28px 'Nunito',sans-serif;margin:15px 0 10px}.hero p{font-size:12px;color:#7b8b6c;max-width:320px}.primary{background:var(--green);color:white;border:0;border-radius:9px;padding:13px 21px;font-size:12px}.garden{position:absolute;right:15px;bottom:0;width:39%;height:220px}.garden svg{width:100%;height:100%}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0 32px}.stat{border:1px solid var(--line);border-radius:13px;background:#fffef9;padding:20px;display:flex;align-items:center;gap:15px}.stat .icon{background:#f4eedf;border-radius:11px;padding:12px;font-size:21px}.stat strong{font-size:23px}.stat small{display:block;font-size:11px;color:#92998b;margin-top:4px}.section-title{display:flex;justify-content:space-between;align-items:center;margin:25px 0 18px}.section-title span{font-size:11px;color:#99a08f}.daily{background:#fffef9;border:1px solid var(--line);border-radius:15px;padding:9px 22px}.task{display:flex;align-items:center;gap:16px;padding:17px 0;border-bottom:1px solid var(--line)}.task:last-child{border:0}.task-num{border:1px solid #dfe5d5;border-radius:50%;width:30px;height:30px;display:grid;place-items:center;font-size:11px;color:#99a287}.task h3{margin:0 0 5px;font-size:13px}.task p{font-size:11px;color:#959a8d;margin:0}.task button{margin-left:auto;border:1px solid #dfe5d5;border-radius:8px;padding:9px 14px;color:var(--green);background:#fffef9;font-size:11px}.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.tile{border:1px solid var(--line);border-radius:14px;padding:24px;background:#fffefa;text-align:left;color:var(--ink)}.tile .big-icon{font-size:30px}.tile p{color:#94998d;font-size:12px}.tile .arrow{font-size:12px;color:#738467}.tile:nth-child(2){background:#f4eee7}.tile:nth-child(3){background:#edf0e7}footer{display:flex;justify-content:space-between;font-size:10px;color:#a2a795;border-top:1px solid var(--line);margin-top:37px;padding:22px 0}.panel{background:#fffef9;border:1px solid var(--line);padding:30px;border-radius:17px;margin-top:20px}.tabs{display:flex;gap:9px;flex-wrap:wrap;margin:22px 0}.tabs button,.secondary{border:1px solid #dce2d4;padding:10px 17px;border-radius:8px;background:#fffef9;color:var(--green)}.tabs .selected{background:var(--green);color:white}.kana-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.kana-grid button{padding:16px 4px;background:#fffef9;border:1px solid var(--line);border-radius:12px;font-size:30px;color:var(--green)}.kana-grid small{display:block;font-size:11px;color:#99a08f;margin-top:7px}.flash{min-height:270px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:#e9eedf;border-radius:16px;cursor:pointer;padding:25px}.flash .jp{font-size:54px}.flash p{margin:10px;font-size:16px}.flash small{color:#889879}.controls{display:flex;gap:10px;justify-content:center;margin:20px 0;flex-wrap:wrap}.choices{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:25px}.choices button,.word{border:1px solid #dbe2d1;border-radius:10px;padding:18px;background:white;color:var(--green)}.choices button:disabled{opacity:.7}.quiz-title{font-size:42px;text-align:center;margin:30px 0}.feedback{min-height:35px;text-align:center;margin-top:20px;color:var(--green)}.memory{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.memory button{min-height:90px;background:#e7eddc;border:1px solid #d7e0cb;border-radius:12px;font-size:20px;color:var(--green)}.memory button.done{background:#f2f4ed;color:#a1af94}.word{display:inline-block;margin:6px;padding:12px 18px}.input{padding:12px;border-radius:8px;border:1px solid var(--line);max-width:100%;margin:5px}.review-item{padding:14px 0;border-bottom:1px solid var(--line)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--green);color:white;padding:13px 24px;border-radius:10px;display:none;z-index:5}button:hover{filter:brightness(.96)}button:focus-visible,a:focus-visible{outline:3px solid #d3a987;outline-offset:3px}@media(min-width:1400px){main{padding:0 70px}}@media(max-width:1000px){aside{width:200px;padding:30px 14px}main{margin-left:200px;padding:0 25px}.stats{gap:8px}.stat{padding:14px;gap:8px}.tile{padding:17px}.brand{font-size:21px}}@media(max-width:700px){aside{position:static;width:auto;padding:18px;border:0}.brand{margin:0}.nav-label,.side-note,.local{display:none}nav{display:flex;overflow:auto;margin-top:20px;gap:5px}nav button{white-space:nowrap;padding:10px;font-size:14px}nav button span{font-size:11px;margin-left:4px}main{margin:0;padding:0 18px}header{height:60px}header b{display:none}h1{font-size:27px}.hero{padding:24px;min-height:260px}.hero-copy{width:80%}.hero h2{font-size:24px}.garden{opacity:.5;right:-30px;width:45%}.stats{gap:6px}.stat{padding:12px 8px;display:block}.stat .icon{display:none}.stat strong{font-size:20px}.stat small{font-size:10px}.tiles{grid-template-columns:1fr}.tile{padding:20px}.panel{padding:20px}.memory{gap:7px}.memory button{font-size:16px;min-height:73px}footer span{display:none}}
.lesson-toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:15px 0}.lesson-field{display:grid;gap:8px;margin:18px 0;color:#536b59;font-size:13px}.lesson-field input,.lesson-field textarea,.lesson-field select,#lesson-filter{font:inherit;padding:12px;border:1px solid #dce2d4;background:#fffef9;border-radius:9px;color:var(--ink);width:100%}.lesson-field textarea{resize:vertical;line-height:1.7}.lesson-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.lesson-entry h3,.lesson-front,.lesson-question{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.7}.preserve{white-space:pre-wrap;overflow-wrap:anywhere}.lesson-entry blockquote{border-left:3px solid #bacba9;margin:20px 0;padding:5px 16px;white-space:pre-wrap;line-height:1.8}.lesson-entry .reading{color:#839277}.lesson-flash{width:100%;border:0;color:var(--ink)}.lesson-front{font-size:28px}.lesson-question{font-size:25px;margin:25px 0}.lesson-flash hr{width:70%;border:0;border-top:1px solid #cfdbc1}.upload-label{cursor:pointer;font-size:14px}.delete-label{font-size:12px;color:#9e7061;cursor:pointer}#lesson-filter{width:auto;margin:5px}#lesson-feedback{white-space:pre-wrap;overflow-wrap:anywhere}.choices button{white-space:pre-wrap;overflow-wrap:anywhere}.lesson-entry details{margin-left:auto}.lesson-toolbar form{margin:0}summary{cursor:pointer}@media(max-width:700px){.lesson-list{grid-template-columns:1fr}.lesson-toolbar{align-items:stretch}.lesson-front{font-size:24px}}

/* Khánh's study space: clearer structure, larger labels, and a calm study-first palette. */
:root{--green:#285541;--ink:#20392e;--muted:#65766c;--line:#e2e8df;--cream:#f5f7f3;--accent:#c27c5b;--soft-green:#e8f0e8;--paper:#fff}
body{background:var(--cream);color:var(--ink);font-family:'DM Sans','Segoe UI',sans-serif;font-size:15px;line-height:1.55}
aside{width:264px;background:#fff; border-right:1px solid var(--line);padding:30px 20px 22px;box-shadow:3px 0 18px #20392e08}
.brand{font-size:23px;letter-spacing:-.8px;margin:0 0 43px 5px;color:var(--green)}
.brand>span:first-child{color:var(--accent);font-size:30px}.brand-small{font-size:9px;letter-spacing:2px;margin-left:42px;color:#738379}
.nav-label{font-size:10px;letter-spacing:1.15px;line-height:1.5;color:#839187;margin:0 10px 12px}
nav{gap:5px}nav button{display:flex;align-items:center;gap:10px;width:100%;min-height:44px;padding:10px 12px;border:1px solid transparent;text-align:left;color:#586b60;font-size:17px;border-radius:9px;transition:background .15s,border-color .15s,color .15s}
nav button span{font-size:13px;margin:0;font-weight:500}nav button:hover{background:#f4f7f3}nav button.active{background:var(--soft-green);border-color:#d9e6d9;color:var(--green);font-weight:700}
#cloud-status{margin-top:15px;border:1px solid var(--line);border-radius:9px;background:#fbfcfa;color:#52685a;padding:10px;text-align:left;font-size:11px}
.side-note{background:#f4f6ef;border:1px solid #e8ecdf;border-radius:12px;padding:16px;font-size:19px;color:#758c69}.side-note h3{font-size:13px;margin:8px 0 5px;color:var(--ink)}.side-note p{font-size:11px;line-height:1.65;color:#68776a}
main{margin-left:264px;padding:0 48px 18px;max-width:1550px}header{height:72px;font-size:12px;letter-spacing:.25px;color:#718076;border-color:var(--line)}header b{color:#9aa49c;font-size:12px}header button{font-size:12px;padding:9px 13px;background:#fff}
.eyebrow{font-size:10px;letter-spacing:1.35px;color:#718875;margin:26px 0 8px}h1{font:800 31px 'Nunito',sans-serif;letter-spacing:-.6px;color:#20392e;margin-bottom:6px}h2{font-size:18px;letter-spacing:-.2px}h3{font-size:15px}.subtitle{color:#68786d;font-size:13px;margin:0 0 20px;max-width:760px}
.hero{min-height:220px;padding:28px 30px;border:1px solid #d9e5d5;border-radius:14px;background:linear-gradient(105deg,#eaf1e5 0%,#eaf1e5 60%,#e4ecdf 100%);box-shadow:0 8px 24px #294d3510}
.hero-copy{width:70%;max-width:610px}.pill{font-size:10px;letter-spacing:.6px;padding:6px 10px;color:#466a52;background:#ffffffc9}.hero h2{font-size:25px;line-height:1.25;margin:12px 0 6px;color:#244b36}.hero p{font-size:13px;line-height:1.7;color:#536f5c;max-width:440px;margin:0 0 13px}.garden{width:31%;height:210px;right:14px;opacity:.78}.primary{background:var(--green);border-radius:8px;font-size:12px;font-weight:700;padding:11px 16px;box-shadow:0 2px 4px #1e4e3318}.primary:hover{background:#204732;filter:none}.secondary{border:1px solid #d8e1d8;border-radius:8px;background:#fff;color:#315944;font-size:12px;padding:9px 13px}
.srs-home{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:16px 0;padding:16px 19px;background:#fff;border:1px solid var(--line);border-left:3px solid #739475;border-radius:10px}.srs-home .eyebrow{margin:0 0 5px}.srs-home h2{margin:0 0 4px;font-size:16px}.srs-home p{margin:0;color:#66756a;font-size:12px}.srs-home .primary{white-space:nowrap}
.stats{gap:12px;margin:14px 0 24px}.stat{background:#fff;border-color:var(--line);border-radius:10px;padding:14px 16px;gap:12px;min-height:74px}.stat .icon{background:#f2f5ed;color:#687f5c;padding:9px;border-radius:9px;font-size:17px}.stat strong{font-size:21px;color:#274936}.stat small{font-size:11px;font-weight:500;color:#69796e;margin-top:1px}.section-title{margin:25px 0 12px}.section-title h2{font-size:17px}.section-title>span{font-size:10px;letter-spacing:.6px;color:#859187}
.tiles{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.tile{border:1px solid var(--line);border-radius:11px;background:#fff;text-align:left;padding:17px;min-height:164px;transition:transform .15s,box-shadow .15s,border-color .15s}.tile:hover{transform:translateY(-2px);box-shadow:0 8px 20px #20392e10;border-color:#c9d9ca;filter:none}.tile:nth-child(2),.tile:nth-child(3){background:#fff}.tile:nth-child(4){background:#fff}.tile .big-icon{display:inline-grid;place-items:center;width:37px;height:37px;background:#eef4ec;border-radius:10px;color:#436950;font-size:21px}.tile h3{margin:12px 0 4px;color:#294737}.tile p{color:#6d7a70;font-size:11px;line-height:1.55;margin:0 0 10px}.tile .arrow{font-weight:700;color:#40684d;font-size:11px}
.panel{background:#fff;border-color:var(--line);border-radius:12px;padding:23px;margin-top:16px;box-shadow:0 2px 8px #20392e05}.daily{background:#fff;border-color:var(--line);border-radius:11px}.task{gap:13px;padding:14px 0}.task h3{font-size:13px}.task p{font-size:11px}.task button{font-size:11px;background:#fff;border-color:#d8e1d8}footer{border-color:var(--line);font-size:10px;color:#87948a;margin-top:32px;padding:17px 0}#toast{background:#254d37}
.lesson-list{gap:12px}.lesson-entry h3,.lesson-question{line-height:1.55}.lesson-field{color:#455e4d;font-size:12px}.lesson-field input,.lesson-field textarea,.lesson-field select,#lesson-filter{border-color:#dce4dc;background:#fff;font-size:13px}.lesson-toolbar{gap:8px}.lesson-toolbar .primary,.lesson-toolbar .secondary{min-height:37px}
button:focus-visible,a:focus-visible{outline:3px solid #d18a68;outline-offset:2px}
@media(max-width:1200px){main{padding:0 30px 18px}.tiles{grid-template-columns:repeat(2,minmax(0,1fr))}.side-note{padding:13px}}
@media(max-width:900px){aside{width:220px;padding:24px 13px 18px}main{margin-left:220px;padding:0 22px 16px}.brand{font-size:20px}.nav-label{font-size:9px}nav button span{font-size:12px}.hero-copy{width:76%}}
@media(max-width:700px){aside{position:static;width:auto;padding:13px 14px 9px;border:0;border-bottom:1px solid var(--line);box-shadow:none}.brand{font-size:20px;margin:0}.brand>span:first-child{font-size:25px}.brand-small{display:inline;font-size:8px;letter-spacing:1.5px;margin:0 0 0 8px}.nav-label,.side-note{display:none}nav{display:flex;overflow-x:auto;margin-top:12px;gap:5px;padding-bottom:3px;scrollbar-width:thin}nav button{flex:0 0 auto;width:auto;min-height:38px;padding:8px 10px;font-size:15px;border:1px solid #edf0eb}nav button span{font-size:11px}#cloud-status{margin-top:7px;width:100%;min-height:31px;padding:6px 9px}main{margin:0;padding:0 16px 14px}header{height:54px;font-size:11px}header b{display:none}h1{font-size:25px}.eyebrow{margin-top:20px}.hero{padding:20px;min-height:230px}.hero-copy{width:88%;z-index:2}.hero h2{font-size:21px}.hero p{font-size:12px;max-width:330px}.garden{width:38%;right:-12px;opacity:.28}.srs-home{align-items:flex-start;flex-direction:column;gap:10px;padding:14px}.srs-home .primary{white-space:normal}.stats{gap:7px}.stat{padding:11px 8px;min-height:66px}.stat .icon{display:none}.stat strong{font-size:18px}.stat small{font-size:9px}.tiles{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.tile{min-height:155px;padding:13px}.tile .big-icon{width:32px;height:32px;font-size:18px}.tile h3{font-size:13px;margin-top:9px}.tile p{font-size:10px}.section-title{align-items:flex-end;gap:8px}.section-title>span{font-size:8px;text-align:right}.panel{padding:17px}.memory{gap:7px}.memory button{min-height:73px}footer span{display:none}}
@media(max-width:390px){.tiles{grid-template-columns:1fr}.tile{min-height:unset}.stats{grid-template-columns:repeat(3,minmax(0,1fr))}.stat{padding:10px 6px}.stat strong{font-size:16px}}