@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;600;700&display=swap');
:root{--bg:#f7f6f2;--ink:#172621;--muted:#718079;--line:#e6e7df;--green:#255f4a;--deep:#142e27;--gold:#c9aa6b;--cream:#f4ead5;--white:#fff;--shadow:0 12px 36px rgba(16,45,31,.055)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:'DM Sans',system-ui,-apple-system,sans-serif;font-size:14px}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.55;cursor:not-allowed}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #79af94;outline-offset:2px}.loading-fallback{padding:60px;text-align:center}.layout{display:grid;grid-template-columns:248px minmax(0,1fr);min-height:100vh}.sidebar{background:#17312a;color:#edf3ed;position:sticky;top:0;height:100vh;padding:30px 17px 22px;display:flex;flex-direction:column;gap:26px;overflow:auto}.brand{display:flex;align-items:center;gap:10px;padding:0 13px}.brand-icon{display:grid;place-items:center;width:37px;height:37px;border-radius:11px;background:linear-gradient(140deg,#caad76,#81633d);color:#1c3027;font-size:21px;font-weight:800}.brand-name{font-family:Georgia,serif;font-size:21px;line-height:1.03;font-weight:700;letter-spacing:-.5px}.brand-sub{font-size:10px;color:#a6bcaf;letter-spacing:1.3px;margin-top:6px}.navgroup{display:grid;gap:4px}.nav-label{font-size:10px;font-weight:800;color:#8eaa9c;padding:0 15px 10px;text-transform:uppercase;letter-spacing:1.9px}.navbtn{border:0;background:transparent;color:#adbfaf;display:flex;align-items:center;gap:12px;text-align:left;width:100%;padding:12px 14px;border-radius:11px;font-weight:600}.navbtn svg{width:18px;height:18px}.navbtn:hover{background:#24433a;color:#fff}.navbtn.active{background:#355649;color:#fefdfa}.nav-count{margin-left:auto;font-size:11px;background:#486d5a;padding:2px 6px;border-radius:7px;color:#e6fff0}.side-bottom{margin-top:auto}.side-quote{font-family:Georgia,serif;border:1px solid #466455;border-radius:14px;padding:18px;color:#e6efe4;font-size:20px;line-height:1.5;background:linear-gradient(160deg,#2b4b3c,#1d382f)}.side-quote small{display:block;font-family:'DM Sans',sans-serif;font-size:11px;color:#a5bcb0;margin-top:8px}.side-profile{display:flex;gap:11px;align-items:center;padding:18px 8px 0}.avatar{width:37px;height:37px;border-radius:50%;display:grid;place-items:center;background:#d6b77c;color:#244136;font-weight:800}.main{min-width:0;padding:28px 44px 70px;max-width:1620px;width:100%;margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:30px}.bread{font-size:13px;color:#77827b}.bread strong{color:#243d32}.top-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.chip{border:1px solid #e3e7dd;border-radius:999px;padding:8px 12px;background:#fff;color:#355c4c;font-weight:700;font-size:12px;display:inline-flex;align-items:center;gap:6px}.chip.gold{background:#f9f0dd;color:#8b6629;border-color:#f5e8ca}.iconbtn{border:1px solid #e3e7dd;width:36px;height:36px;display:grid;place-items:center;border-radius:11px;background:#fff}.iconbtn svg{width:17px;height:17px}.section-title{font-size:27px;line-height:1.15;margin:0;letter-spacing:-.8px;font-weight:800}.muted{color:var(--muted)}.eyebrow{text-transform:uppercase;font-size:11px;font-weight:800;letter-spacing:2px;color:#6c987f}.hero{position:relative;background:#18372f;border-radius:22px;min-height:298px;overflow:hidden;color:#fff;display:flex;align-items:center;margin-bottom:28px;box-shadow:var(--shadow)}.hero-copy{z-index:2;padding:34px 40px;max-width:60%}.hero h1{font-family:Georgia,'Noto Sans SC',serif;font-weight:500;font-size:41px;letter-spacing:-1px;margin:14px 0 12px;line-height:1.17}.hero h1 em{font-style:normal;color:#ebcc91}.hero p{color:#c4d9cc;font-size:14px;line-height:1.75;max-width:440px;margin:0 0 21px}.hero-art{position:absolute;inset:0 0 0 auto;width:58%;height:100%;overflow:hidden;pointer-events:none}.hero-art svg{height:100%;width:100%}.btn{border:0;border-radius:10px;padding:11px 16px;display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:800;white-space:nowrap;justify-content:center}.btn svg{width:16px;height:16px}.btn-primary{background:#d4b67b;color:#24352d}.btn-primary:hover{background:#e6c78d}.btn-green{background:#246148;color:white}.btn-green:hover{background:#1a503c}.btn-light{background:white;color:#234736;border:1px solid #e5e9e2}.btn-subtle{background:#f0f4ee;color:#335345}.btn-ghost{border:1px solid #e1e8df;background:transparent;color:#355547}.home-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px}.card{background:white;border:1px solid #e9ece5;border-radius:17px;box-shadow:var(--shadow)}.pad{padding:23px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px}.section-head{margin-bottom:17px}.section-head h2{font-size:20px;letter-spacing:-.4px;margin:0}.subtle-link{border:0;background:none;color:#2d8060;font-weight:800;font-size:12px}.story-list{display:grid;gap:10px}.story-row{display:flex;align-items:center;gap:14px;padding:12px;border:1px solid #edf0e9;border-radius:13px;background:white;text-align:left;width:100%;transition:transform .15s,box-shadow .15s}.story-row:hover{box-shadow:0 8px 18px rgba(0,0,0,.06);transform:translateY(-1px)}.mini-cover{height:70px;width:68px;flex:none;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:31px;background:linear-gradient(145deg,#375e51,#162d3e);color:#f3dfab;position:relative;overflow:hidden}.mini-cover:after{content:'';position:absolute;inset:60% -20% -20%;transform:rotate(-15deg);background:#ffffff20}.mini-cover.indigo{background:linear-gradient(150deg,#494e87,#191d38)}.mini-cover.amber{background:linear-gradient(150deg,#bf8c53,#594530)}.mini-cover.rose{background:linear-gradient(150deg,#a25e74,#4c3855)}.story-row-info{flex:1;min-width:0}.story-row-info strong{font-size:14px;font-weight:800;display:block;margin-bottom:4px}.story-row-info small{display:block;color:#7e8e84;font-size:11px;margin-bottom:6px}.story-row-info p{margin:0;font-size:12px;color:#7e8a83;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.story-row .arrow{color:#9aaca1;font-size:23px}.tag{display:inline-flex;align-items:center;font-size:10px;font-weight:800;letter-spacing:.6px;border-radius:7px;padding:4px 7px;color:#2e7653;background:#e7f4e9}.tag.orange{background:#fff0de;color:#9b5b31}.tag.violet{background:#efebfa;color:#70569a}.tag.gray{background:#f2f3ee;color:#6c7a6e}.stats-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.stat{padding:18px 20px}.stat strong{font-size:27px;display:block;letter-spacing:-.6px;margin:6px 0 4px}.stat small{color:#718177}.progress-track{height:8px;background:#edf2ea;border-radius:999px;overflow:hidden}.progress-fill{height:100%;border-radius:999px;background:#3f8d69}.weekly-bars{height:95px;display:flex;align-items:flex-end;justify-content:space-between;gap:10px;margin:21px 0 7px}.week-column{flex:1;text-align:center;min-width:0}.week-column .bar{border-radius:5px 5px 3px 3px;background:#dce6dc;height:6px;min-height:6px;max-height:80px}.week-column .bar.on{background:#4b9974}.week-column label{font-size:11px;color:#99a49b;display:block;margin-top:8px}.vocab-preview{display:grid;gap:10px}.word-teaser{padding:12px 0;border-bottom:1px solid #f0f1ec;display:flex;justify-content:space-between;gap:12px}.word-teaser:last-child{border:0}.hanzi{font-family:'Noto Sans SC',sans-serif;font-size:19px;font-weight:600}.small-title{font-size:13px;font-weight:800;margin:0}.series-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.series-card{overflow:hidden;display:flex;flex-direction:column}.series-cover{height:176px;background:linear-gradient(165deg,#315b50,#172e35);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;color:#e8d5a7}.series-cover.indigo{background:linear-gradient(160deg,#495587,#151d36)}.series-cover.amber{background:linear-gradient(155deg,#cb9d61,#534536)}.series-cover.rose{background:linear-gradient(165deg,#ab7688,#473852)}.cover-icon{font-size:70px;filter:drop-shadow(0 5px 6px #0003);position:relative;z-index:2}.cover-mount{position:absolute;background:#ffffff14;clip-path:polygon(0 100%,37% 20%,60% 65%,82% 3%,100% 100%);width:110%;height:110%;bottom:-50%;left:-5%}.series-card-text{padding:20px}.series-card-text h3{font-family:'Noto Sans SC',serif;font-size:22px;margin:9px 0 4px}.series-card-text .english{font-size:12px;color:#6c8175;font-weight:700}.series-card-text p{line-height:1.65;color:#77867d;font-size:13px;min-height:44px}.story-chapters{display:grid;gap:10px;margin-top:20px}.chapter-card{width:100%;display:flex;text-align:left;align-items:center;gap:14px;padding:15px;border:1px solid #e8ece5;border-radius:14px;background:white}.chapter-card:hover{border-color:#a6c8b3}.chapter-number{background:#eef4ee;color:#295b44;display:grid;place-items:center;border-radius:10px;height:44px;width:44px;font-weight:800;flex:none}.chapter-card-main{flex:1}.chapter-card h3{margin:0 0 4px;font-family:'Noto Sans SC';font-size:17px}.chapter-card p{margin:0;color:#859387;font-size:12px}.back{background:none;border:0;color:#46735b;padding:0;margin-bottom:16px;font-weight:800;font-size:13px}.reader-top{max-width:850px;margin:auto}.reader-header{padding:16px 0 21px;border-bottom:1px solid #e4e9e1}.reader-header h1{font-family:'Noto Sans SC',serif;font-size:34px;letter-spacing:-.6px;margin:8px 0}.reader-sub{display:flex;gap:12px;align-items:center;flex-wrap:wrap;color:#819087}.reader-tools{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin:20px 0}.toolbtn{border:1px solid #e1e7df;padding:9px 12px;border-radius:9px;background:#fff;display:inline-flex;align-items:center;gap:7px;color:#375b48;font-weight:700;font-size:12px}.toolbtn.active{background:#eaf3e9;border-color:#a8c9b4}.toolbtn svg{width:15px;height:15px}.reader-paper{background:#fffdf9;border:1px solid #eee9dc;border-radius:17px;padding:42px 55px;box-shadow:0 10px 40px #31281307}.reader-paper .para{font-family:'Noto Sans SC',sans-serif;font-size:22px;line-height:2.2;margin:0 0 21px;letter-spacing:.5px;border-left:3px solid transparent;padding-left:10px}.reader-paper .para.playing{border-color:#73a98e;background:#eef7ed55;border-radius:5px}.word{font:inherit;background:none;border:0;padding:1px 0;cursor:pointer;color:inherit;display:inline;line-height:inherit;transition:background .1s}.word:hover{background:#e2eada;border-radius:3px}.word.focus{color:#2b7859;text-decoration:underline;text-decoration-color:#9fbfac;text-decoration-style:dashed;text-underline-offset:5px}.word.cultural{color:#956d39;text-decoration:underline;text-decoration-color:#e2c28b;text-underline-offset:5px;text-decoration-style:dotted}.word.saved{background:#e8edd8;border-radius:3px}.reader-bottom{max-width:850px;margin:19px auto}.vocab-inline{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}.vocab-pill{border:1px solid #e4ebe2;padding:9px 11px;background:#fff;border-radius:10px;cursor:pointer}.vocab-pill strong{font-family:'Noto Sans SC';font-size:16px;margin-right:8px}.vocab-pill small{color:#7d8f82}.grammar-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.grammar-item{background:#fff;padding:19px;border:1px solid #e7ece6;border-radius:13px}.grammar-item h4{font-family:'Noto Sans SC';font-size:17px;margin:0 0 6px}.grammar-item small{color:#718b79;display:block;margin-bottom:7px}.grammar-item p{margin:8px 0;font-size:13px;color:#586d60;line-height:1.6}.culture-item{padding:14px 0;border-bottom:1px solid #eee}.culture-item strong{font-size:13px}.culture-item p{margin:5px 0;color:#708177;line-height:1.65}.drawer-scrim{position:fixed;inset:0;background:#0d241a66;z-index:110}.drawer{position:fixed;right:0;top:0;bottom:0;width:min(430px,95vw);background:#fff;z-index:111;padding:33px 28px;overflow:auto;box-shadow:-14px 0 45px #05190b26}.close{border:0;background:#f2f4f0;border-radius:8px;width:32px;height:32px;display:grid;place-items:center;float:right;font-size:19px}.drawer-word{font-family:'Noto Sans SC';font-size:51px;margin:28px 0 5px}.drawer-pin{font-size:19px;color:#3b7255}.drawer-def{font-size:20px;margin:12px 0;color:#243c30;font-weight:700}.drawer-foot{margin-top:25px;display:grid;gap:10px}.divider{height:1px;background:#e9eee7;margin:22px 0}.question{padding:20px;border:1px solid #e5ebe3;border-radius:13px;margin:13px 0;background:white}.question h4{font-size:15px;line-height:1.6;font-family:'Noto Sans SC';margin:0 0 14px}.answer{display:block;width:100%;border:1px solid #e2e8df;background:#fff;padding:12px 13px;border-radius:9px;margin:7px 0;text-align:left}.answer.selected{border-color:#45936a;background:#eaf7ec}.answer.right{border-color:#3e8d66;background:#eaf6ed}.answer.wrong{border-color:#c58a68;background:#fcf0e9}.quiz-feedback{color:#66786b;font-size:12px;margin-top:11px}.quiz-footer{margin-top:18px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.review-card{background:#fff;border:1px solid #e7ebe4;border-radius:19px;padding:35px;text-align:center;max-width:620px;margin:26px auto}.review-hanzi{font-family:'Noto Sans SC';font-size:60px;margin:15px 0 25px}.review-answer{border-top:1px solid #e8ece4;padding-top:23px;margin-top:25px}.review-answer strong{font-size:18px}.grading{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-top:20px}.grading button{padding:12px 3px;border:1px solid #dfe8df;border-radius:9px;background:#f7fbf7;font-weight:800;color:#2d6648}.empty{text-align:center;padding:40px 20px;background:white;border:1px solid #e9ede6;border-radius:17px}.empty .em{font-size:42px;margin-bottom:12px}.empty p{color:#84948b;max-width:370px;margin:10px auto 19px;line-height:1.7}.form-grid{display:grid;gap:14px;max-width:620px}.field label{display:block;font-weight:800;font-size:12px;margin:0 0 7px}.field input,.field select,.field textarea{width:100%;border:1px solid #dbe3d9;border-radius:10px;padding:12px;background:white;color:#213b2d;outline:none}.field input:focus,.field textarea:focus{border-color:#68a780}.field small{display:block;color:#829187;margin-top:5px}.info-box{background:#f0f5eb;border:1px solid #dbe9d9;padding:14px 16px;border-radius:10px;color:#52715a;line-height:1.6}.warn-box{background:#fcf2e5;border:1px solid #f1debe;padding:13px 15px;border-radius:10px;color:#8b6a3a;line-height:1.55}.success{color:#2c7b54}.error{color:#b8513f}.footerline{font-size:11px;color:#8f9c90;text-align:center;padding:28px}.mobilebar{display:none}.flex{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.tight{margin:4px 0}.mt-12{margin-top:12px}.mt-20{margin-top:20px}.mt-30{margin-top:30px}.mb-0{margin-bottom:0}.pinyin{color:#738e7c;font-size:12px}.progress-hero{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}.metric{padding:22px;background:white;border:1px solid #e8ece5;border-radius:14px}.metric .value{font-size:32px;font-weight:800;margin:8px 0 3px}.metric .name{font-size:12px;color:#829286}.metrics-two{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin-top:20px}.achievement-list{display:grid;gap:12px}.achievement{display:flex;gap:10px;align-items:center;font-weight:700}.achievement .medal{height:34px;width:34px;border-radius:10px;background:#faf0d9;display:grid;place-items:center}.daily-quest{display:flex;align-items:center;gap:12px;padding:10px 0;border-top:1px solid #edf1ea}.daily-quest input{accent-color:#356d50;width:18px;height:18px}.daily-quest span{flex:1}.daily-quest small{color:#b68c45;font-weight:800}.switch{display:flex;align-items:center;gap:10px}.switch input{width:18px;height:18px;accent-color:#327652}.word-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.saved-tile{text-align:left;padding:15px;background:white;border:1px solid #e6ece3;border-radius:12px}.saved-tile strong{font-family:'Noto Sans SC';font-size:19px}.saved-tile small{display:block;color:#75907c;margin:4px 0}.saved-tile p{margin:0;color:#829087;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.search{padding:11px 13px;border:1px solid #dde7df;border-radius:10px;background:white;min-width:230px}.levelbadge{font-size:10px;background:#e8f1e9;color:#417358;padding:5px 8px;border-radius:8px;font-weight:800}.xpbox{display:flex;align-items:center;gap:8px}.xpbar{width:90px;height:7px;background:#e9f1e8;border-radius:20px;overflow:hidden}.xpbar>div{height:100%;background:#b99554;border-radius:20px}.settings-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}.toast{position:fixed;bottom:24px;right:24px;background:#193a2e;color:#fff;padding:13px 18px;border-radius:10px;box-shadow:0 15px 36px #0003;z-index:200;max-width:340px;font-weight:600;animation:slideup .18s}@keyframes slideup{from{transform:translateY(12px);opacity:0}to{transform:translateY(0);opacity:1}}@media(max-width:1100px){.main{padding:24px 27px 66px}.home-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(3,1fr)}}@media(max-width:760px){.layout{grid-template-columns:1fr}.sidebar{display:none}.mobilebar{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:90;background:#17342c;padding:9px max(12px,env(safe-area-inset-left)) calc(7px + env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-right));justify-content:space-around;border-top:1px solid #3c6251}.mobilebar button{display:flex;flex-direction:column;gap:4px;align-items:center;justify-content:center;border:0;background:transparent;color:#b2c6b8;font-size:10px;font-weight:700;min-width:54px}.mobilebar button.active{color:#f3cf92}.mobilebar svg{width:20px;height:20px}.main{padding:19px 16px 115px}.topbar{margin-bottom:17px}.bread{max-width:56%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.top-actions{gap:5px}.hero{min-height:275px}.hero-copy{max-width:85%;padding:25px}.hero h1{font-size:31px}.hero p{font-size:13px}.hero-art{width:78%;opacity:.5}.series-grid{grid-template-columns:1fr}.stats-row{gap:8px}.stat{padding:13px}.stat strong{font-size:22px}.card.pad{padding:18px}.reader-paper{padding:25px 15px}.reader-paper .para{font-size:19px;line-height:2.1;padding-left:6px}.reader-header h1{font-size:26px}.grammar-cards,.metrics-two,.settings-grid{grid-template-columns:1fr}.progress-hero{grid-template-columns:repeat(2,1fr);gap:8px}.metric{padding:15px}.metric .value{font-size:26px}.word-grid{grid-template-columns:repeat(2,1fr)}.review-hanzi{font-size:50px}.review-card{padding:22px 16px}.grading{gap:5px}.grading button{font-size:11px;padding:10px 0}.home-grid{gap:16px}}@media(max-width:365px){.word-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:1fr 1fr}.reader-paper .para{font-size:18px}.chip{padding:6px 8px;font-size:10px}}

/* Free ChatGPT Story Studio · version 0.2 */
.studio-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.studio-step{background:#fff;border:1px solid #e2e9df;padding:18px;border-radius:14px;display:grid;gap:6px}
.studio-step>span{width:30px;height:30px;display:grid;place-items:center;background:#dcebe0;color:#235e47;font-weight:800;border-radius:50%}
.studio-step strong{font-size:14px}
.studio-step small{font-size:12px;color:#728275;line-height:1.5}
.studio-form{max-width:750px}
.import-feedback:not(:empty){border:1px solid #dce9d9;padding:12px;border-radius:10px;background:#f2f7ef}
.import-feedback.error{border-color:#efd1c8;background:#fff1ed}
#story-json,#story-prompt-text{line-height:1.6;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px}
#story-prompt-display[hidden]{display:none}
@media(max-width:760px){.studio-steps{grid-template-columns:1fr}.studio-step{grid-template-columns:30px 1fr;align-items:center}.studio-step small{grid-column:2}}

/* Series-folder improvements and long-form graded reading */
.studio-folder{display:grid;grid-template-columns:minmax(0,2fr) minmax(160px,1fr);gap:14px;margin:8px 0 16px}
.studio-folder input,.studio-folder select{width:100%;padding:11px 13px;border-radius:9px;border:1px solid var(--line);background:white;color:var(--ink)}
.story-chapters .chapter-card{transition:background .15s ease,border-color .15s ease}
.story-chapters .chapter-card:hover{background:#f0f6ef}
.reader-paper .para{line-height:2.15;margin-bottom:1.6em}
@media(max-width:680px){.studio-folder{grid-template-columns:minmax(0,1fr)}}