:root{--ink:#20272a;--muted:#626d73;--accent:#dc5428;--orange:#ed6735;--border:#dfe3e3;--surface:#fff;--bg:#f7f8f8;--side:230px;color-scheme:light;font-family:"Space Grotesk","IBM Plex Sans Thai",Tahoma,sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button,a{color:inherit}button{cursor:pointer}button:disabled{cursor:default}button{background:none;border:0}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #f78c59;outline-offset:3px}a{text-decoration:none}p,h1,h2,h3,h4{margin:0}.ico{display:inline-block;vertical-align:middle;flex:none}.skip{position:fixed;left:-1000px}.skip:focus{left:12px;top:12px;z-index:100;background:white;padding:10px}.shell{display:grid;grid-template-columns:var(--side) minmax(0,1fr);min-height:100vh}.sidebar{height:100dvh;position:sticky;top:0;background:#fff;border-right:1px solid var(--border);display:flex;flex-direction:column;z-index:11}.brand{min-height:79px;display:flex;gap:12px;align-items:center;padding:12px 22px}.brand img{width:39px;height:39px}.brand strong{display:block;font-size:25px;letter-spacing:-1.7px;font-weight:700;line-height:1.13}.brand small{font:600 9px/1.6 "Space Grotesk",sans-serif;letter-spacing:2.05px;color:#697379}.side-nav{padding:14px 13px;overflow:auto}.nav-group{margin-bottom:23px}.nav-label{font-size:11px;color:#757d81;font-weight:600;letter-spacing:.3px;margin:0 12px 8px}.side-link{display:flex;align-items:center;text-align:left;gap:11px;min-height:40px;padding:8px 13px;border-radius:7px;font-size:14px;color:#465056;font-weight:500;transition:background .15s}.side-link:hover{background:#f4f6f5}.side-link.on{background:#fff0e8;color:#bf471d;font-weight:600}.side-link.on .ico{color:#d65124}.badge-count{margin-left:auto;font:600 11px "Space Grotesk",sans-serif;background:#f0f2f2;color:#667075;border-radius:5px;padding:2px 6px}.side-bottom{margin-top:auto;padding:15px 16px 0}.progress-nudge{border:1px solid #eaded4;background:#fcf8f3;border-radius:10px;padding:13px 13px 12px;display:block}.progress-nudge .top{display:flex;gap:7px;font-weight:600;font-size:12px;align-items:center}.progress-nudge .top .ico{color:#bb6b36}.progress-line{height:5px;border-radius:5px;background:#e6e1dc;overflow:hidden;margin:11px 0 7px}.progress-line span{display:block;background:var(--orange);height:100%}.side-progress-note{font-size:11px;color:#736c65}.profile{display:flex;align-items:center;gap:10px;padding:17px 4px;border-top:1px solid var(--border);margin-top:15px}.profile .avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#f7e7d7;color:#9b6337}.profile strong,.profile small{display:block}.profile strong{font-size:13px;line-height:1.5}.profile small{font-size:10px;color:var(--muted)}
.work-area{min-width:0}.topbar{background:rgba(255,255,255,.95);height:63px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,3.1vw,52px);gap:12px}.topbar-left,.topbar-right,.crumbs{display:flex;align-items:center;gap:12px}.crumbs{font-size:12px;gap:10px;color:#697478}.crumbs strong{font-weight:500;color:#384449}.crumbs .sep{color:#b5bdc0}.tool-icon{display:grid;place-items:center;width:33px;height:33px;border:1px solid transparent;border-radius:7px;color:#596469}.tool-icon:hover{background:#f1f3f3;border-color:var(--border)}.top-divider{width:1px;height:18px;background:var(--border)}.online{font-size:11px;font-weight:500;display:flex;gap:7px;align-items:center;color:#53655c}.online i{width:7px;height:7px;border-radius:100%;background:#42a27b;box-shadow:0 0 0 3px #e9f5ee}.mobile-menu{display:none}.content{max-width:1580px;margin:0 auto;padding:29px clamp(20px,3.1vw,52px) 44px}.page-intro{margin-bottom:20px}.page-intro h1{font-size:clamp(29px,2.5vw,41px);line-height:1.45;font-weight:600;letter-spacing:-1.2px}.page-intro p{margin-top:1px;font-size:14px;color:var(--muted);line-height:1.7}.hero{position:relative;isolation:isolate;min-height:244px;overflow:hidden;border-radius:13px;background:#162125;color:#fff;display:flex;align-items:center}.hero:before{content:"";position:absolute;inset:0;z-index:-3;background-image:linear-gradient(#d9efec0a 1px,transparent 1px),linear-gradient(90deg,#d9efec0a 1px,transparent 1px);background-size:24px 24px}.hero-art{position:absolute;z-index:-2;right:0;top:0;bottom:0;width:56%;background:radial-gradient(ellipse at 55% 52%,#375453a8,transparent 71%);mask-image:linear-gradient(90deg,transparent,#000 20%)}.hero-copy{position:relative;width:61%;padding:25px 32px}.hero-label{display:inline-flex;align-items:center;gap:7px;color:#ffc39f;font-size:11px;font-weight:600;background:#46352b;border:1px solid #695040;border-radius:5px;padding:3px 9px;margin-bottom:12px}.hero h2{font-size:clamp(25px,2.47vw,38px);font-weight:600;line-height:1.42;letter-spacing:-1.1px}.hero p{font-size:13px;line-height:1.65;color:#c0ccce;max-width:425px;margin:4px 0 20px}.hero .btn{height:38px;min-height:38px;font-size:13px}.hero-tools{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.hero-meta{font-size:11px;display:flex;align-items:center;gap:6px;color:#b8c3c6}.hero-caption{position:absolute;right:16px;bottom:13px;display:flex;align-items:center;gap:7px;font:500 9px/1.2 "Space Grotesk",monospace;color:#d6e3e0;background:#142224dc;border:1px solid #63757077;border-radius:4px;letter-spacing:1px;padding:5px 7px}.hero-caption b{width:5px;height:5px;border-radius:50%;background:#f4935a}
.btn{min-height:38px;padding:8px 15px;display:inline-flex;align-items:center;justify-content:center;gap:7px;font-weight:600;font-size:13px;line-height:1.35;background:var(--surface);border:1px solid var(--border);border-radius:7px;color:var(--ink)}.btn:hover:not(:disabled){background:#f2f4f3}.btn.primary{background:var(--orange);color:#fff;border-color:transparent}.btn.primary:hover:not(:disabled){background:#d95524}.btn:disabled{opacity:.52}.lab-panel{background:#fff;border:1px solid var(--border);border-radius:12px}.section{margin-top:26px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:13px;gap:12px}.section-heading h2{font-weight:600;font-size:21px;letter-spacing:-.5px;display:flex;align-items:center;gap:10px}.section-heading h2 .ico{color:#47545a}.text-link{color:#b54620;font-weight:600;font-size:12px;display:inline-flex;gap:6px;align-items:center}.text-link:hover{text-decoration:underline}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.lab-card{overflow:hidden;background:white;border:1px solid var(--border);border-radius:10px;display:flex;flex-direction:column;transition:border-color .16s,box-shadow .16s,transform .16s}.lab-card:hover{border-color:#b4babc;transform:translateY(-2px);box-shadow:0 6px 16px #1625220b}.card-art{position:relative;width:100%;height:clamp(105px,9.7vw,153px);overflow:hidden}.card-art img{display:block;width:100%;height:100%;object-fit:cover}.card-art .art-tag{position:absolute;left:11px;bottom:9px;font:600 9px/1.1 "Space Grotesk",sans-serif;letter-spacing:1.2px;background:#ffffffdb;border:1px solid #727e7640;border-radius:3px;padding:4px 6px;color:#49564d}.card-content{padding:13px 16px 15px}.card-title{display:flex;align-items:center;justify-content:space-between;gap:8px}.card-title h3{font-weight:600;font-size:18px;line-height:1.5;letter-spacing:-.4px}.circle-arrow{display:grid;place-items:center;width:25px;height:25px;border-radius:50%;border:1px solid var(--border);color:#606a6c;flex:none}.card-content p{font-size:12px;line-height:1.7;color:var(--muted);margin-top:3px}.track-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.track-card{background:white;display:flex;align-items:center;gap:12px;border:1px solid var(--border);border-radius:9px;padding:15px;min-width:0}.track-card:hover{border-color:#c1c9c9}.track-icon{width:39px;height:39px;display:grid;place-items:center;border-radius:9px;flex:none}.track-icon.arduino{background:#dff0ed;color:#087c7c}.track-icon.arduino b{font:bold 30px/1 Arial}.track-icon.esp32{background:#e7ebee;color:#445258}.track-icon.pi{background:#f2e4ec;color:#9c537a}.track-card strong,.track-card small{display:block}.track-card strong{font-size:15px;font-weight:600}.track-card small{font-size:10.5px;color:var(--muted);line-height:1.5;margin-top:3px}.track-card>.ico{margin-left:auto;color:#8c979b}.menu-scrim{display:none}
.progress-overview{background:#fff;border:1px solid var(--border);border-radius:12px;padding:22px;max-width:840px}.progress-overview h2{font-size:18px}.progress-overview header{display:flex;align-items:center;gap:16px}.progress-overview .score{color:var(--accent);font-size:32px;font-weight:700}.progress-overview .progress-line{height:8px}.progress-rows{margin-top:18px}.progress-row{display:flex;gap:14px;align-items:center;border-top:1px solid var(--border);padding:12px 0}.progress-row .row-text{flex:1}.progress-row strong,.progress-row small{display:block}.progress-row strong{font-size:14px}.progress-row small{font-size:12px;color:var(--muted)}.progress-row .state{font-size:11px;color:#5e7268;white-space:nowrap}.progress-row .ico{color:#74847d}
dialog{width:min(560px,calc(100vw - 28px));border:1px solid var(--border);border-radius:13px;padding:0;background:#fff;color:var(--ink);box-shadow:0 24px 90px #18212638;max-height:78dvh;overflow:auto}dialog::backdrop{background:#17212662}dialog .modal-head{display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--border);padding:13px 18px}dialog .modal-head input{flex:1;min-width:0;border:0;font-size:16px;outline:none}dialog .modal-head h2{font-size:19px;flex:1}dialog .modal-body{padding:10px 12px 15px}.search-result{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:6px}.search-result:hover,.search-result:focus-visible{background:#fff2ea}.search-result .ico{color:#858e90}.search-result strong,.search-result small{display:block}.search-result strong{font-size:14px;font-weight:500}.search-result small{font-size:11px;color:var(--muted)}.search-empty{padding:15px;color:var(--muted);font-size:14px}.help-body{padding:18px}.help-body p{font-size:14px;line-height:1.75;color:var(--muted);margin-bottom:13px}.help-body strong{color:var(--ink)}.help-body .btn{margin-right:8px}
@media(min-width:1600px){:root{--side:254px}.content{padding-top:38px}.hero{min-height:290px}.hero-copy{padding-left:40px}.hero p{font-size:15px}.section{margin-top:32px}}
@media(max-height:820px) and (min-width:901px){.nav-group{margin-bottom:15px}.side-link{min-height:37px}.side-nav{padding-top:6px;padding-bottom:2px}.brand{min-height:70px}.side-bottom{padding-top:8px}.profile{padding:12px 4px;margin-top:10px}}
@media(max-width:1130px){:root{--side:209px}.side-nav{padding-left:10px;padding-right:10px}.content{padding-left:24px;padding-right:24px}.brand{padding-left:17px}.card-grid,.track-grid{gap:11px}.card-content{padding:12px}.hero-copy{padding:24px}.track-card{padding:12px;gap:8px}.track-icon{width:32px;height:32px}}
@media(max-width:900px){.shell{display:block}.sidebar{position:fixed;left:0;top:0;transform:translateX(-102%);width:232px;transition:transform .16s}.menu-open .sidebar{transform:none}.menu-open .menu-scrim{display:block;position:fixed;inset:0;z-index:10;background:#13202655}.mobile-menu{display:grid}.topbar{height:54px;padding:0 20px}.content{padding-top:21px}.topbar-left{gap:7px}.hero{min-height:220px}.hero-copy{padding:22px}.page-intro h1{font-size:29px}}
@media(max-width:640px){.content{padding:18px 15px 32px}.topbar{padding:0 12px}.crumbs{font-size:11px;gap:6px}.topbar-right{gap:3px}.topbar-right .online{display:none}.topbar-right .top-divider{display:none}.hero{min-height:260px;align-items:flex-end}.hero-art{width:74%;height:74%;top:0;opacity:.88;background-position:center;mask-image:linear-gradient(90deg,transparent,#000 22%)}.hero:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(0deg,#172326 8%,#172326bb 48%,transparent 88%),linear-gradient(90deg,#172326 5%,transparent 78%)}.hero-copy{width:100%;padding:19px}.hero-label{margin-bottom:8px}.hero h2{font-size:27px}.hero p{max-width:90%;margin-bottom:13px;font-size:12px}.hero-caption{display:none}.section{margin-top:23px}.section-heading h2{font-size:19px}.card-grid,.track-grid{grid-template-columns:1fr}.lab-card{display:grid;grid-template-columns:37% minmax(0,1fr);align-items:stretch}.card-art{height:auto;min-height:111px}.card-art img{width:100%;height:100%;position:absolute;object-fit:cover}.card-content{display:flex;flex-direction:column;justify-content:center;padding:13px}.card-title h3{font-size:16px}.card-content p{font-size:12px}.circle-arrow{width:20px;height:20px}.section-heading .text-link{font-size:11px}.track-card{padding:12px}.progress-row .state{display:none}.side-bottom{padding-top:5px}.page-intro{margin-bottom:16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
.card-art.board-cover{background-color:#e3ede6;background-image:linear-gradient(#ccdcce 1px,transparent 1px),linear-gradient(90deg,#ccdcce 1px,transparent 1px);background-size:14px 14px}
.card-art.board-cover img{position:absolute;inset:7% 0;margin:auto;width:76%;height:86%;object-fit:contain;transform:rotate(-10deg);filter:drop-shadow(2px 5px 3px #25352c33)}
.board-thumb{width:64px;height:45px;flex:none;display:grid;place-items:center}.board-thumb img{max-width:100%;max-height:43px;object-fit:contain}
.hero-art img{position:absolute;inset:5% 3%;width:94%;height:90%;object-fit:contain;filter:drop-shadow(8px 12px 8px #071112aa);transform:rotate(-7deg)}
@media(max-width:640px){.hero-art img{inset:4% 2%;width:96%;height:92%;transform:rotate(-6deg)}}
.hardware-credits{font-size:12px;color:var(--muted);margin-top:13px}.hardware-credits summary{cursor:pointer}.hardware-credits p{font-size:12px;margin:8px 0}.hardware-credits a{text-decoration:underline}