@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700;800;900&display=swap');
:root{--paper:#faf9f6;--ink:#292a27;--muted:#90918a;--line:#eae9e3;--accent:#e97650;--accent-dark:#c65331;--white:#fff;--radius:20px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px}button,a,input{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button{cursor:pointer;transition:background .18s,transform .18s}button:hover{transform:translateY(-1px)}button:disabled{cursor:default;opacity:.35;transform:none}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #b8a6e8;outline-offset:4px}button{border:0}button.primary{background:var(--ink);color:white;padding:14px 22px;border-radius:10px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:24px}button.primary:hover{background:#474940}.primary span{font-size:21px}.secondary{border:1px solid #dfdfd7;background:#fff;border-radius:9px;padding:11px 17px;font-weight:500}.secondary:hover{background:#f5f4ee}.text-btn{background:none;padding:8px 0;color:#777a70;font-size:12px}.text-btn:hover{color:var(--ink)}.danger{color:#b56552}.sidebar{width:232px;background:#fff;border-right:1px solid var(--line);position:fixed;inset:0 auto 0 0;display:flex;flex-direction:column;padding:36px 20px 20px;z-index:20}.brand{display:flex;align-items:center;gap:10px;padding:0 12px;font-size:21px;font-weight:800;letter-spacing:1px}.brandmark{width:35px;height:35px;background:var(--accent);color:#fff;border-radius:10px;display:grid;place-items:center;font-size:36px;line-height:1;transform:rotate(-8deg)}.brand small{display:block;font-size:7px;font-weight:500;letter-spacing:1.65px;margin-top:4px;color:#96978f}.nav-label{font-size:10px;color:#a2a49b;letter-spacing:2px;margin:54px 16px 14px}.nav-item{width:100%;padding:15px 16px;display:flex;gap:13px;align-items:center;background:transparent;color:#85877f;text-align:left;margin-bottom:7px;border-radius:10px;font-weight:500}.nav-item>span{font-size:21px;width:22px;line-height:1}.nav-item.active{background:#f8eee7;color:#b86648}.nav-item em{margin-left:auto;font-style:normal;font-size:11px;color:#aaa}.sidebar-bottom{margin-top:auto;padding:20px 16px 30px}.little-pencil{font-size:34px;transform:rotate(-12deg);color:#beb9a9;margin-bottom:11px}.sidebar-bottom p{font-size:12px;line-height:1.9;color:#83857b}.sidebar-bottom small{font-size:10px;color:#b0b2a8}.profile{display:flex;align-items:center;gap:10px;border-top:1px solid var(--line);padding:22px 10px 0;font-size:11px}.avatar{background:#edeae2;border-radius:50%;width:34px;height:34px;display:grid;place-items:center;font-size:14px;color:#8c8570}.profile small{display:block;color:#aaa;margin-top:4px;font-size:9px}.profile-dot{width:6px;height:6px;background:#9ea98e;border-radius:50%;margin-left:auto}.app{margin-left:232px}header{height:85px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 48px}.breadcrumb{font-size:11px;color:#8c8f84}.breadcrumb span{padding:0 13px;color:#c7c8be}.header-right{display:flex;align-items:center;gap:25px}.local-note{font-size:10px;color:#8a8c82}.local-note i{display:inline-block;width:5px;height:5px;background:#a8b497;border-radius:50%;margin-right:7px}.icon-btn{width:25px;height:25px;border:1px solid #d9dbd1;border-radius:50%;background:transparent;color:#85877f}main{max-width:1430px;margin:auto;padding:44px 48px 0}[hidden]{display:none!important}.welcome{display:grid;grid-template-columns:1.1fr 1fr;align-items:center;gap:25px;min-height:380px}.eyebrow{font-family:Arial,sans-serif;font-size:9px;letter-spacing:2.1px;font-weight:600;color:#96988c;margin:0 0 18px}.welcome h1{font-size:clamp(30px,3.1vw,49px);line-height:1.45;letter-spacing:-1.7px;font-weight:800;margin:0 0 20px}.welcome h1>span{color:var(--accent)}.intro{font-size:12px;color:#898b81;line-height:2;margin:0 0 26px}.hero-meta{display:flex;gap:18px;color:#9c9e94;font-size:9px;margin-top:23px}.hero-art{height:370px;position:relative}.hero-art svg{width:100%;height:100%;overflow:visible}.journey{display:flex;align-items:center;gap:18px;background:#f0efe8;border:1px solid #e7e6dc;border-radius:12px;padding:19px 24px;margin-top:34px}.journey-icon{font-size:24px;color:#aaa587;width:38px;height:38px;display:grid;place-items:center;background:#e7e5d8;border-radius:10px}.journey strong{font-size:12px;font-weight:600}.journey p{margin:5px 0 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span{font-size:9px;color:#b7b9ac;margin-left:5px}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.course-card{border:1px solid #e6e6dd;border-radius:15px;overflow:hidden;background:#fff;text-align:left;padding:0;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}.course-card:hover{transform:translateY(-5px);box-shadow:0 12px 28px #34372d0b}.course-art{height:185px;position:relative;width:100%;overflow:hidden}.course-art svg{width:100%;height:100%;padding:7px}.card-number{position:absolute;left:17px;top:16px;font:10px Arial,sans-serif;color:#8b907f}.card-level{position:absolute;right:13px;top:13px;border:1px solid #ffffffad;background:#ffffff7a;padding:4px 7px;border-radius:5px;font-size:8px;color:#7c8371}.card-body{padding:20px}.card-kicker{font-size:8px;color:#a6a895;letter-spacing:1px;margin:0 0 7px}.card-body h3{font-size:16px;letter-spacing:-.3px;font-weight:600;margin:0 0 9px}.card-body>p{font-size:10px;color:#a1a497;margin:0;line-height:1.8}.card-meta{display:flex;align-items:center;gap:12px;margin-top:20px;font-size:9px;color:#9c9f92}.card-meta .arrow{margin-left:auto;color:#8a8e80;font-size:17px}.done-badge{position:absolute;right:14px;bottom:12px;background:#fff;padding:4px 8px;border-radius:12px;color:#697a52;font-size:9px}.bottom-tip{margin-top:38px;padding:27px 30px;display:flex;gap:20px;align-items:center;border:1px dashed #deded3;border-radius:12px}.bottom-tip>span{font-size:37px;transform:rotate(-15deg);color:#a7aa99}.bottom-tip h3{font-size:13px;margin:0 0 8px;font-weight:500}.bottom-tip p{font-size:10px;color:#9a9e8e;margin:0}.bottom-tip button{margin-left:auto;background:none;white-space:nowrap;font-size:10px;color:#717a62}.bottom-tip button span{margin-left:15px}footer{padding:30px 0;display:flex;justify-content:space-between;color:#b0b2a7;font-size:9px}footer i{padding:0 6px;font-style:normal}footer>span:last-child{font:7px Arial,sans-serif;letter-spacing:1.2px}.back-link{background:none;padding:0;color:#989b8d;font-size:11px;margin-bottom:27px}.lesson-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}.lesson-heading .eyebrow{margin-bottom:10px}.lesson-heading h1,#galleryView h1{font-size:32px;margin:0 0 12px;font-weight:700}.lesson-heading p:not(.eyebrow){color:#999c8e;font-size:12px;line-height:1.8;margin:0}.lesson-time{font-size:11px;color:#999c8d}.studio{display:grid;grid-template-columns:340px minmax(0,1fr);gap:24px;align-items:start}.guide-panel,.drawing-panel{background:#fff;border:1px solid #e4e5db;border-radius:16px;overflow:hidden}.panel-top{padding:19px 22px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #f0f0e9;font-size:12px}.panel-top>span{font-size:10px;color:#a1a693}.demo-art{height:245px;background:#f8f6ef}.demo-art svg{width:100%;height:100%;padding:15px}.step-dots{display:flex;justify-content:center;gap:8px;padding:17px 0 0}.step-dots button{width:7px;height:7px;padding:0;border-radius:50%;background:#e5e6db}.step-dots button.active{background:var(--accent);width:22px;border-radius:5px}.step-copy{padding:20px 24px}.step-number{color:var(--accent);font:10px Arial,sans-serif;letter-spacing:2px}.step-copy h2{font-size:19px;margin-top:10px}.step-copy>p{color:#8b907e;font-size:12px;line-height:1.9;min-height:69px}.teacher-tip{border-left:2px solid #e4cdb7;background:#faf7f1;color:#a18d75;padding:10px 12px;font-size:10px;line-height:1.8}.step-controls{display:flex;justify-content:space-between;padding:0 24px 24px;gap:10px}.step-controls button{font-size:11px;padding:11px 16px}.canvas-wrap{position:relative;aspect-ratio:5/4;margin:20px;background:#fff;border:1px solid #f0f0e9;border-radius:8px;overflow:hidden;background-image:radial-gradient(#dadbd12b .65px,transparent .65px);background-size:12px 12px}.canvas-wrap canvas{width:100%;height:100%;display:block;touch-action:none;position:relative;z-index:2;cursor:crosshair}.canvas-reference{position:absolute;inset:0;opacity:.18;pointer-events:none}.canvas-reference svg{width:100%;height:100%;padding:30px}.canvas-hint{position:absolute;top:50%;left:0;width:100%;text-align:center;font-size:12px;color:#bcc0b0;pointer-events:none;z-index:3}.drawing-tools{display:flex;align-items:center;gap:20px;padding:0 20px 18px;flex-wrap:wrap}.tool-group,.colors{display:flex;align-items:center;gap:5px}.tool{width:30px;height:31px;background:none;border-radius:6px;color:#a2a693;font-size:21px}.tool.active{background:#f6ede4;color:#be7855}.tool-separator{height:18px;width:1px;background:#e8e9df;margin:0 4px}.color-dot{width:20px;height:20px;border-radius:50%;padding:0;border:3px solid white;box-shadow:0 0 0 1px transparent}.color-dot.active{box-shadow:0 0 0 1px #949988}.brush-label{display:flex;align-items:center;gap:8px;font-size:10px;color:#969c88;margin-left:auto}.brush-label input{width:65px;accent-color:#8d967b}.brush-label span{width:12px}.canvas-actions{padding:15px 20px;border-top:1px solid #ebede3;display:flex;gap:12px;align-items:center;flex-wrap:wrap}.canvas-actions .primary,.canvas-actions .secondary{font-size:10px;padding:10px 13px;gap:0}.save-note{font-size:8px;color:#afb49f;margin-right:auto}.lesson-finish{display:flex;gap:18px;align-items:center;background:#f0ede3;border-radius:12px;padding:23px 28px;margin:25px 0}.lesson-finish>span{font-size:28px;color:#a4a786}.lesson-finish h3{font-size:14px;margin:0 0 7px}.lesson-finish p{font-size:11px;margin:0;color:#979e87}.lesson-finish button{margin-left:auto;font-size:11px}.gallery-desc{font-size:12px;color:#a1a88f}.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:30px}.gallery-card{background:white;border:1px solid #e5e7dc;border-radius:14px;overflow:hidden;padding:0;text-align:left}.gallery-card img{width:100%;display:block;background:#fff;aspect-ratio:5/4;object-fit:contain;border-bottom:1px solid #eff0e7}.gallery-caption{padding:18px;display:flex;align-items:center;justify-content:space-between}.gallery-caption strong{font-size:12px;font-weight:500}.gallery-caption span{font-size:9px;color:#a7ad96}.empty-gallery{grid-column:1/-1;text-align:center;padding:85px 20px;border:1px dashed #dce0cf;border-radius:20px}.empty-gallery>span{font-size:48px;color:#b8c0a6}.empty-gallery h2{font-size:20px;margin:20px 0 10px}.empty-gallery p{color:#9ca68a;font-size:12px;margin-bottom:25px}.toast{position:fixed;bottom:25px;left:calc(50% + 116px);transform:translate(-50%,20px);background:#30352c;color:white;padding:14px 24px;border-radius:10px;font-size:12px;z-index:100;opacity:0;pointer-events:none;transition:.25s}.toast.show{opacity:1;transform:translate(-50%,0)}dialog{border:1px solid #e0e5d4;border-radius:20px;padding:38px;max-width:510px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 20px 100px #29312220}dialog::backdrop{background:#22281f70;backdrop-filter:blur(3px)}dialog h2{font-size:23px;margin-bottom:20px}dialog ol{padding-left:20px;color:#7d8870;font-size:13px;line-height:2.2}dialog li{padding-left:5px;margin-bottom:7px}.close-dialog{position:absolute;right:18px;top:14px;background:none;color:#a6ae98;font-size:25px}.dialog-note{font-size:11px;color:#a2ab94;line-height:1.9;margin:22px 0}.dialog-actions,.work-dialog-actions{display:flex;gap:14px;justify-content:flex-end;margin-top:25px}#workDialog{max-width:700px}#workImage{width:100%;max-height:60vh;object-fit:contain;border:1px solid #ecefe3;border-radius:10px}.work-dialog-actions .danger{margin-right:auto}
@media(min-width:1500px){.welcome{min-height:430px}.hero-art{height:410px}.course-art{height:220px}}
@media(max-width:1150px){.sidebar{width:200px;padding:30px 12px 20px}.brand{font-size:18px}.brand small{font-size:6px}.app{margin-left:200px}header{padding:0 30px}main{padding:32px 30px 0}.hero-meta{gap:9px;font-size:8px}.hero-art{height:320px}.welcome h1{font-size:33px}.course-grid{gap:15px}.course-art{height:165px}.card-body{padding:17px}.studio{grid-template-columns:290px minmax(0,1fr);gap:17px}.canvas-wrap{margin:14px}.drawing-tools{gap:10px;padding:0 14px 12px}.brush-label{margin-left:0}.canvas-actions{padding:13px;gap:8px}.save-note{display:none}.canvas-actions .danger{margin-right:auto}.toast{left:calc(50% + 100px)}}
@media(max-width:850px){.sidebar{width:170px}.brand{font-size:16px;gap:8px;padding:0 8px}.brandmark{width:29px;height:29px}.brand small{font-size:5px;letter-spacing:1px}.nav-label{margin-top:43px}.nav-item{font-size:12px;gap:8px;padding:13px 12px}.sidebar-bottom{padding:10px 12px 24px}.sidebar-bottom p{font-size:10px}.profile{padding:18px 4px 0;gap:7px;font-size:9px}.app{margin-left:170px}header{height:70px;padding:0 24px}main{padding:28px 24px 0}.local-note{display:none}.welcome{grid-template-columns:1.15fr 1fr;gap:0;min-height:320px}.welcome h1{font-size:27px;letter-spacing:-1px}.intro{font-size:10px}.hero-art{height:270px}.hero-meta{flex-wrap:wrap;gap:8px}.hero-meta span:last-child{display:none}.eyebrow{font-size:7px;letter-spacing:1.5px}.journey{padding:15px;gap:12px;margin-top:25px}.journey-progress{min-width:100px}.journey strong{font-size:10px}.journey p{font-size:8px}.journey-icon{width:30px;height:30px}.course-grid{grid-template-columns:repeat(2,1fr)}.section-note{display:none}.bottom-tip{padding:20px;gap:14px}.bottom-tip p{line-height:1.8}.bottom-tip button{font-size:9px}.studio{grid-template-columns:1fr}.guide-panel{display:grid;grid-template-columns:230px 1fr}.guide-panel .panel-top{grid-column:1/-1}.demo-art{height:220px;grid-row:2/5}.step-dots{padding-top:20px}.step-copy{padding:15px 20px}.step-copy>p{min-height:0}.step-copy h2{font-size:17px}.teacher-tip{display:none}.step-controls{padding:0 20px 20px}.canvas-wrap{max-height:550px;aspect-ratio:5/4}.lesson-finish{padding:20px;flex-wrap:wrap}.lesson-finish button{margin-left:46px}.gallery-grid{grid-template-columns:repeat(2,1fr)}.toast{left:calc(50% + 85px)}footer>span:last-child{display:none}}
@media(max-width:600px){.sidebar{position:fixed;inset:0 0 auto;width:auto;height:66px;padding:0 18px;flex-direction:row;align-items:center;border-right:0;border-bottom:1px solid var(--line);gap:18px}.brand{padding:0;font-size:16px}.brand small{font-size:5px}.nav-label,.sidebar-bottom,.profile{display:none}.sidebar nav{display:flex;gap:5px;margin-left:auto}.nav-item{width:auto;padding:8px 9px;margin:0;font-size:10px;gap:5px;border-radius:7px}.nav-item>span{display:none}.nav-item em{display:none}.app{margin-left:0;padding-top:66px}header{height:49px;padding:0 21px}.breadcrumb{font-size:9px}.header-right{gap:0}.icon-btn{width:21px;height:21px;font-size:11px}main{padding:30px 21px 0}.welcome{display:flex;flex-direction:column;align-items:stretch;gap:0;position:relative}.welcome .eyebrow{font-size:7px;margin-bottom:16px}.welcome h1{font-size:32px;line-height:1.4;letter-spacing:-1.3px;margin-bottom:17px}.intro{font-size:11px;line-height:1.9;margin-bottom:20px}.welcome .primary{font-size:11px;padding:12px 18px;gap:30px}.hero-art{height:265px;margin-top:0px}.hero-meta{font-size:8px;margin-top:18px;gap:15px}.hero-meta span:last-child{display:initial}.journey{margin-top:0;padding:15px 12px;gap:10px}.journey strong{font-size:10px}.journey p{font-size:8px;max-width:180px;line-height:1.6}.journey-progress{min-width:75px}.journey-progress>span{font-size:8px}.course-section{padding-top:35px}h2{font-size:22px}.section-heading .eyebrow{font-size:7px;letter-spacing:1.4px}.filter-row{gap:2px;margin:21px 0 18px}.filter{font-size:9px;padding:9px 10px}.course-grid{gap:12px}.course-art{height:145px}.course-art svg{padding:3px}.card-number{font-size:8px;left:12px;top:12px}.card-level{right:8px;top:9px;font-size:7px;padding:3px 5px}.card-body{padding:14px 12px}.card-kicker{font-size:7px;letter-spacing:.5px}.card-body h3{font-size:13px}.card-body>p{font-size:9px;line-height:1.7;min-height:31px}.card-meta{font-size:8px;gap:8px;margin-top:13px}.bottom-tip{padding:19px 16px;gap:12px;align-items:flex-start;flex-wrap:wrap;margin-top:25px}.bottom-tip>span{font-size:28px}.bottom-tip h3{font-size:12px}.bottom-tip p{font-size:9px;max-width:240px}.bottom-tip button{margin-left:40px;padding:0}footer{padding:24px 0;font-size:8px}.lesson-heading{gap:12px;align-items:flex-start}.lesson-heading h1,#galleryView h1{font-size:26px}.lesson-heading p:not(.eyebrow){font-size:11px}.lesson-time{font-size:9px;white-space:nowrap;margin-top:33px}.back-link{margin-bottom:22px}.guide-panel{grid-template-columns:1fr}.guide-panel .panel-top{grid-column:auto}.demo-art{grid-row:auto;height:220px}.step-dots{padding-top:16px}.step-copy{padding:16px 20px}.step-copy>p{font-size:11px;line-height:1.8}.teacher-tip{display:block}.step-controls{padding-bottom:20px}.panel-top{padding:16px;font-size:11px}.panel-top .text-btn{font-size:10px}.drawing-tools{gap:13px}.brush-label{margin-left:auto}.canvas-actions .primary,.canvas-actions .secondary{font-size:9px;padding:10px}.canvas-actions .danger{font-size:10px}.canvas-hint{font-size:11px}.lesson-finish h3{font-size:12px}.lesson-finish p{font-size:10px}.lesson-finish button{margin-left:0}.gallery-grid{gap:14px}.gallery-caption{padding:12px;display:block}.gallery-caption strong{font-size:11px;display:block}.gallery-caption span{font-size:8px;display:block;margin-top:5px}#galleryView .section-heading{align-items:flex-start;flex-direction:column}.gallery-desc{font-size:11px;line-height:1.8}.toast{left:50%;max-width:90%;text-align:center;width:max-content;font-size:11px}dialog{padding:30px 25px}dialog h2{font-size:21px}dialog ol{font-size:12px}.lesson-finish>span{font-size:24px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media(max-width:600px){.brand{white-space:nowrap;flex-shrink:0}.sidebar{gap:8px;padding:0 14px}.nav-item{white-space:nowrap;padding:9px 7px;font-size:9px}.brand small{display:none}.brandmark{width:25px;height:25px;font-size:29px}.brand{font-size:15px;gap:6px}.welcome h1{font-size:30px}}
@media(max-width:360px){.welcome h1{font-size:28px}.hero-meta{font-size:7px;gap:9px}.journey-icon{display:none}.journey-progress{min-width:70px}.filter{font-size:8px;padding:9px 8px}.course-art{height:125px}.card-body h3{font-size:12px}.card-body>p{font-size:8px}.card-meta{font-size:7px;gap:5px}.card-level{display:none}.lesson-time{display:none}}