:root{--ink:#20233b;--muted:#6f7183;--line:#dedee8;--panel:#fff;--canvas:#f5f4fa;--purple:#6554c0;--purple-dark:#443391;--purple-pale:#eeebff;--mint:#dff8ee;--yellow:#ffd85a;--error:#a42d39;--shadow:0 20px 60px #26243b14;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--canvas);font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--canvas)}button,input,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit}button:disabled{cursor:not-allowed;opacity:.46}button:focus-visible,input:focus-visible,textarea:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}.loading{min-height:100vh;display:grid;place-items:center}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 20% 20%,#fff 0,#f2eeff 36%,transparent 37%),linear-gradient(145deg,#f8f7ff,#e9f8f4)}.login-card{width:min(460px,100%);padding:38px;border:1px solid #ded9f4;border-radius:28px;background:#fffc;box-shadow:var(--shadow);backdrop-filter:blur(16px)}h1,h2,p{margin-top:0}.login-card h1{font-size:clamp(32px,7vw,49px);line-height:1.02;letter-spacing:-.045em}.login-card h1 span,.brand span{color:var(--purple)}.eyebrow,.side-heading{text-transform:uppercase;letter-spacing:.11em;font-size:11px;font-weight:850;color:var(--purple)}label span{display:block;margin-bottom:7px;font-size:13px;font-weight:750}.login-card input{width:100%;min-height:48px;margin-bottom:14px;padding:0 13px;border:1px solid var(--line);border-radius:12px;background:#fff}.login-card details{margin:10px 0 20px}.login-card summary{cursor:pointer;color:var(--muted);font-size:13px}.login-card details label{margin-top:15px}.primary,.secondary,.ghost,.chip,.tab,.icon-button,.choice,.nav-item,.project-link,.button-link{min-height:42px;padding:9px 14px;border-radius:12px;border:0;font-weight:720;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.primary{background:var(--purple);color:#fff}.primary:hover{background:var(--purple-dark)}.secondary{background:#fff;border:1px solid var(--line)}.secondary:hover{border-color:#aaa0e5;background:#faf9ff}.ghost{background:transparent}.privacy-note,.inline-note,.muted{color:var(--muted);font-size:13px;line-height:1.5}.form-error{min-height:20px;margin-top:12px;color:var(--error)}.app-shell{height:100vh;display:grid;grid-template-columns:244px minmax(0,1fr);grid-template-rows:64px minmax(0,1fr);overflow:hidden}.topbar{grid-column:1/-1;display:flex;align-items:center;gap:12px;padding:0 18px;border-bottom:1px solid var(--line);background:#fff;z-index:3}.brand{border:0;background:transparent;font-size:18px;font-weight:900;letter-spacing:-.025em}.course-badge{padding:5px 9px;border-radius:999px;background:var(--purple-pale);color:var(--purple-dark);font-size:11px;font-weight:800}.save-state{margin-left:auto;color:var(--muted);font-size:12px}.save-state[data-state=error]{color:var(--error)}.sidebar{grid-row:2;padding:18px 14px;overflow:auto;border-right:1px solid var(--line);background:#fbfbfd}.sidebar nav{display:grid;gap:4px}.nav-item,.project-link{justify-content:flex-start;width:100%;background:transparent;text-align:left}.nav-item.active,.project-link.active{background:var(--purple-pale);color:var(--purple-dark)}.sidebar section{margin-top:28px}.side-heading{padding:0 12px}.project-link{display:block;margin-bottom:5px}.project-link strong,.project-link small{display:block}.project-link small{margin-top:3px;color:var(--muted)}#main{min-width:0;min-height:0;overflow:auto}.welcome{min-height:100%;display:grid;grid-template-columns:minmax(0,620px) 280px;gap:80px;align-items:center;justify-content:center;padding:7vw}.welcome h1{font-size:clamp(40px,6vw,76px);line-height:.98;letter-spacing:-.055em}.welcome p:not(.eyebrow){font-size:18px;line-height:1.6;color:var(--muted)}.welcome-art{display:grid;grid-template-columns:1fr auto 1fr;gap:15px;align-items:center;font-size:60px}.welcome-art span:nth-child(2){font-size:30px;color:var(--purple)}.workspace{height:100%;display:grid;grid-template-columns:minmax(340px,40%) minmax(480px,60%)}.coach-panel,.build-panel{min-width:0;min-height:0;background:#fff}.coach-panel{display:flex;flex-direction:column;border-right:1px solid var(--line)}.panel-head,.builder-head{min-height:70px;display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid var(--line)}.panel-head h1{font-size:20px;margin:0}.panel-head .eyebrow{margin:0 0 3px}.panel-head .icon-button{margin-left:auto}.icon-button{background:#fff7d6;border:1px solid #f3d36c}.mission-card{margin:16px 18px 10px;padding:15px;border-radius:16px;background:linear-gradient(135deg,var(--purple-pale),#f7f8ff);border:1px solid #ded9ff;line-height:1.45}.mission-card p{margin-bottom:8px;color:var(--muted)}.choice-row{display:flex;gap:6px;padding:0 18px 12px;overflow-x:auto}.choice-row .secondary{min-height:34px;padding:6px 9px;font-size:11px;white-space:nowrap}.chat{flex:1;min-height:120px;overflow:auto;padding:12px 18px}.bubble{max-width:94%;padding:13px 14px;border-radius:16px;line-height:1.45}.bubble.ai{background:#f2f2f6;border-bottom-left-radius:5px}.bubble p{margin:7px 0}.choice{width:100%;justify-content:flex-start;margin-top:6px;background:#fff;border:1px solid var(--line);text-align:left}.prompt-box{padding:14px 18px;border-top:1px solid var(--line)}.check{display:flex;align-items:center;gap:8px;margin-bottom:8px;font-size:12px;color:var(--muted)}.prompt-box textarea{width:100%;min-height:74px;max-height:180px;padding:11px;border:1px solid var(--line);border-radius:13px;resize:vertical}.prompt-actions{display:flex;justify-content:flex-end;gap:7px;margin-top:8px}.suggestion{margin:8px 0;padding:11px;border:1px solid #d6d0ff;border-radius:12px;background:#faf9ff;font-size:12px}.suggestion p{margin-bottom:8px}.build-panel{display:grid;grid-template-rows:auto minmax(0,1fr) auto}.builder-head input{min-width:120px;max-width:280px;border:0;font-size:17px;font-weight:850}.device-actions{display:flex;gap:5px;margin-left:auto}.chip{min-height:34px;padding:5px 9px;background:#fff;border:1px solid var(--line);font-size:11px}.view-tabs{display:flex;padding:3px;border-radius:12px;background:#efeff3}.tab{min-height:34px;padding:6px 10px;background:transparent;font-size:12px}.tab.active{background:#fff;box-shadow:0 1px 4px #0001}.preview-stage{min-height:0;display:grid;place-items:center;padding:20px;background:#ececf2}.preview-frame{width:100%;height:100%;max-width:1000px;max-height:740px;border:1px solid #d8d8e2;border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 10px 38px #25243a14;transition:max-width .25s}.preview-frame.mobile{max-width:390px}.preview-frame iframe{width:100%;height:100%;border:0}.code-workspace{min-height:0;display:grid;grid-template-rows:auto 1fr;background:#171a2b}.file-tabs{display:flex;padding:8px 12px 0;gap:2px}.file-tabs button{padding:8px 12px;border:0;border-radius:9px 9px 0 0;background:#24283d;color:#c8cde3}.file-tabs button.active{background:#303550;color:#fff}.code-workspace textarea{width:100%;height:100%;resize:none;border:0;padding:18px;outline:0;background:#171a2b;color:#edf1ff;font:13px/1.58 ui-monospace,SFMono-Regular,Menlo,monospace;tab-size:2}.versions{padding:25px;overflow:auto}.versions article{display:flex;align-items:center;gap:20px;padding:15px 0;border-bottom:1px solid var(--line)}.versions article>div{flex:1}.versions p{margin:5px 0;color:var(--muted)}.versions small{color:var(--muted)}.builder-footer{display:flex;align-items:center;gap:7px;min-height:64px;padding:10px 14px;border-top:1px solid var(--line);overflow-x:auto}.grow{flex:1}.page{padding:35px;max-width:1250px;margin:auto}.page.narrow{max-width:850px}.page-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:25px}.page-title h1{margin-bottom:0;font-size:38px;letter-spacing:-.04em}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:15px}.card,.empty-card{padding:21px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 4px 18px #24203d08}.card h2{font-size:20px}.card p{color:var(--muted);line-height:1.5}.status-dot{display:block;width:9px;height:9px;border-radius:50%;background:#39aa78;margin-bottom:13px}.timeline{position:relative}.timeline:before{content:"";position:absolute;left:19px;top:0;bottom:0;width:2px;background:#d8d2ff}.timeline article{position:relative;display:grid;grid-template-columns:40px 1fr;gap:15px;margin-bottom:22px}.timeline article>span{z-index:1;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--purple);color:#fff;font-weight:850}.timeline article>div{padding:15px 18px;border:1px solid var(--line);border-radius:16px;background:#fff}.timeline h2{font-size:16px}.timeline p{color:var(--muted)}.notice{position:fixed;right:22px;bottom:22px;z-index:20;width:min(390px,calc(100vw - 44px));padding:14px 16px;border-radius:14px;background:#20233b;color:#fff;box-shadow:var(--shadow)}.notice[data-type=error]{background:#8e2632}.notice[data-type=ok]{background:#176c4a}dialog{width:min(650px,calc(100% - 30px));max-height:80vh;padding:25px;border:0;border-radius:22px;box-shadow:0 24px 80px #11143f42}dialog::backdrop{background:#15162b88;backdrop-filter:blur(3px)}.dialog-close{position:absolute;right:14px;top:12px;border:0;background:transparent;font-size:28px}.symbol-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}.symbol-grid button{aspect-ratio:1;border:1px solid var(--line);border-radius:14px;background:#fff;font-size:32px}.template-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.template-card{padding:15px;border:1px solid var(--line);border-radius:14px;background:#fff;text-align:left}.template-card strong,.template-card span{display:block}.template-card span{margin-top:5px;color:var(--muted)}.dialog-actions{display:flex;flex-wrap:wrap;gap:9px}.button-link{width:max-content}.codes{padding:15px;border-radius:12px;background:#171a2b;color:#fff;overflow:auto}.dashboard-grid{display:grid;grid-template-columns:2fr 1fr;gap:15px;margin-bottom:20px}.metric{font-size:52px!important;font-weight:900;color:var(--ink)!important}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:16px;background:#fff}table{width:100%;border-collapse:collapse}th,td{padding:13px 15px;border-bottom:1px solid var(--line);text-align:left;font-size:13px}th{background:#f7f7fa;color:var(--muted)}
@media(max-width:1050px){.app-shell{grid-template-columns:80px minmax(0,1fr)}.sidebar{padding:12px 8px}.nav-item{font-size:0;justify-content:center}.nav-item:before{font-size:20px}.nav-item:nth-child(1):before{content:'🛠️'}.nav-item:nth-child(2):before{content:'🗂️'}.nav-item:nth-child(3):before{content:'🧭'}.nav-item:nth-child(4):before{content:'🎮'}.nav-item:nth-child(5):before{content:'📋'}.sidebar section{display:none}.workspace{grid-template-columns:minmax(300px,42%) minmax(420px,58%)}.device-actions{display:none}}
@media(max-width:760px){.app-shell{height:auto;min-height:100vh;display:block}.topbar{position:sticky;top:0;min-height:60px}.course-badge,.save-state{display:none}.sidebar{position:fixed;left:0;right:0;bottom:0;z-index:10;display:block;border:0;border-top:1px solid var(--line);padding:6px;background:#fff}.sidebar nav{display:flex;justify-content:space-around}.nav-item{width:auto;min-height:45px}.sidebar section{display:none}#main{padding-bottom:62px}.workspace{height:auto;min-height:calc(100vh - 122px);display:flex;flex-direction:column}.coach-panel{min-height:620px;border:0;border-bottom:1px solid var(--line)}.build-panel{min-height:680px}.builder-head{flex-wrap:wrap}.builder-head input{width:100%;max-width:none}.view-tabs{margin-left:auto}.builder-footer{position:sticky;bottom:57px;background:#fff}.welcome{grid-template-columns:1fr;padding:35px 24px}.welcome-art{display:none}.page{padding:26px 18px}.page-title h1{font-size:31px}.dashboard-grid{grid-template-columns:1fr}.template-grid{grid-template-columns:1fr}.symbol-grid{grid-template-columns:repeat(4,1fr)}}

/* Accessible controls and review surfaces */
:focus-visible{outline:3px solid #6554c0!important;outline-offset:3px}
.diff-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.diff-grid pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:45vh;overflow:auto;background:#f3f1fa;padding:12px}
select,input[type=number],input[type=datetime-local]{min-height:44px;padding:8px;font:inherit}.card label{display:block;margin:12px 0}
@media(max-width:700px){.diff-grid{grid-template-columns:1fr}.sidebar nav .nav-item{font-size:14px!important}.card{min-width:0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(max-width:1050px){.app-shell{grid-template-columns:180px minmax(0,1fr)}.nav-item{font-size:13px!important;justify-content:flex-start}.nav-item:before{display:none}.workspace{display:flex;flex-direction:column;height:auto}.coach-panel,.build-panel{min-height:480px}}
@media(max-width:760px){.sidebar nav{justify-content:flex-start;gap:6px;overflow-x:auto;white-space:nowrap}.nav-item{flex:0 0 auto;padding:10px}.topbar{flex-wrap:wrap}.save-state{display:block;flex-basis:100%;font-size:12px;margin:0}.builder-footer{flex-wrap:wrap}.coach-panel{min-height:0}.build-panel{min-height:650px}}
.file-tabs{align-items:center;gap:5px;flex-wrap:wrap;padding:8px 12px;background:#20243a}
.file-tabs button[data-code]{min-height:38px}
.file-tabs-spacer{flex:1;min-width:8px}
.save-action{min-height:42px;padding:9px 20px;background:#6d5ad0;box-shadow:0 2px 0 #40338b;color:#fff;font-size:15px;font-weight:850;letter-spacing:.01em}
.save-action:hover{background:#5141ad}
.save-action:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}
.builder-head{flex-wrap:wrap}
.builder-head input{flex:1 1 180px}
.builder-head .save-action{flex:0 0 auto;min-height:38px;margin-left:auto;padding:6px 12px;font-size:13px;white-space:nowrap}
.save-state[data-state=saving]{color:#735f00;font-weight:750}
@media(max-width:420px){body,.app-shell{min-width:0}.file-tabs{gap:3px;padding:7px 8px;min-width:0}.file-tabs button[data-code]{flex:0 1 auto;min-width:0;padding:7px 8px;font-size:12px}.file-tabs-spacer{display:none}.file-tabs .save-action{flex:1 0 100%;min-width:0;width:100%;white-space:normal;min-height:46px;margin-top:3px}}
.studio-home{padding-top:10vh}.studio-home h1{font-size:clamp(42px,6vw,70px);letter-spacing:-.055em;margin-bottom:12px}.studio-intro{max-width:680px;font-size:18px;line-height:1.55;color:var(--muted);margin-bottom:34px}.studio-module{min-height:230px;display:flex;flex-direction:column;align-items:flex-start}.studio-module .primary{margin-top:auto}.text-gallery{margin-top:42px;padding-top:28px;border-top:1px solid var(--line)}.text-editor{max-width:850px}.text-editor input,.text-editor textarea{display:block;width:100%;margin-top:7px;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff}.text-editor textarea{min-height:340px;resize:vertical;line-height:1.55}.text-preview{white-space:pre-wrap;overflow-wrap:anywhere;max-height:220px;overflow:auto}.text-gallery small{color:var(--muted)}