/* Structural layout and components. Colors are defined in theme.css. */
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--txt);font:14px/1.6 Inter,system-ui,-apple-system,'Segoe UI',sans-serif}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--purple);outline-offset:2px}header{height:64px;position:sticky;top:0;z-index:5;background:var(--surface-13);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px;gap:20px}.brand{font-weight:800;font-size:18px;white-space:nowrap}.brand b{color:var(--purple)}.top{display:flex;gap:8px}.top button,.nav button{background:transparent;border:0;text-align:left;color:var(--muted);padding:11px 13px;border-radius:9px}.top button.active,.nav button.active{background:var(--surface-28);color:var(--surface-6)}.layout{display:grid;grid-template-columns:246px minmax(0,1fr);min-height:calc(100vh - 64px)}aside{background:var(--surface-3);border-right:1px solid var(--line);padding:25px 14px}.nav{display:grid;gap:5px}.sidecap{font-size:10px;font-weight:800;letter-spacing:1.6px;color:var(--surface-12);margin:12px 12px}main{padding:36px clamp(20px,4vw,64px);max-width:1600px;width:100%;margin:auto}h1{font-size:clamp(26px,3vw,37px);line-height:1.15;margin:6px 0 9px;letter-spacing:-.8px}h2{font-size:18px;margin:0 0 12px}h3{font-size:15px;margin:0 0 7px}p{color:var(--muted);margin:6px 0 15px}.eyebrow{color:var(--purple);font-weight:800;font-size:11px;letter-spacing:1.5px}.sub{max-width:780px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:22px}.stack{display:grid;gap:18px}.grid2{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(290px,1fr);gap:18px}.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.head{display:flex;align-items:start;justify-content:space-between;gap:18px;margin-bottom:20px}.pillrow{display:flex;gap:7px;flex-wrap:wrap;margin:15px 0 22px}.pill{border:1px solid var(--surface-18);background:var(--surface-34);color:var(--surface-19);padding:5px 10px;border-radius:99px;font-size:11px}.pill.purple{color:var(--surface-2);background:var(--surface-45);border-color:var(--surface-40)}.pill.green{color:var(--green)}.pill.red{color:var(--red)}.btn{background:var(--purple);color:var(--surface-29);border:0;border-radius:9px;padding:10px 15px;font-weight:800}.btn.secondary{background:var(--surface-31);color:var(--txt);border:1px solid var(--surface-7)}.btn.small{padding:7px 10px;font-size:12px}.tabs{display:flex;gap:7px;border-bottom:1px solid var(--line);margin:18px 0 22px;overflow:auto}.tabs button{border:0;background:none;color:var(--muted);padding:12px 16px;white-space:nowrap}.tabs button.active{border-bottom:2px solid var(--purple);color:var(--txt)}.field{display:grid;gap:6px;color:var(--muted);font-size:12px}.field input,.field select,textarea,.search{width:100%;background:var(--surface-10);border:1px solid var(--surface-37);border-radius:8px;padding:10px 11px;color:var(--txt);min-width:0}.formgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.kv{display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid var(--surface-39);padding:10px 0}.kv strong{text-align:right}.muted,.small{color:var(--muted)}.small{font-size:12px}.note{background:var(--surface-21);border-left:3px solid var(--purple);border-radius:5px;padding:12px 14px;color:var(--surface-9);font-size:12px}.note.warn{border-color:var(--surface-25)}.stat{font-size:clamp(17px,2vw,23px);font-weight:800}.statlabel{font-size:11px;color:var(--muted)}.pos{color:var(--green)}.neg{color:var(--red)}.chart{width:100%;height:auto;display:block;touch-action:pan-y}.chart text{fill:var(--surface-1);font-size:11px}.chart .grid{stroke:var(--surface-16);stroke-width:1}.legend{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:12px}.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:5px}.tablewrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:12px}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--surface-39);white-space:nowrap}th{color:var(--muted)}.legs{display:grid;gap:9px}.legrow{display:grid;grid-template-columns:100px 1fr 1fr 1fr;gap:9px;align-items:end;padding:12px;border:1px solid var(--surface-4);border-radius:10px}.legrow .field input{padding:8px}.librarytools{display:grid;grid-template-columns:2fr 1fr 1fr;gap:10px;margin:20px 0}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.strategycard{background:var(--panel);border:1px solid var(--line);border-radius:12px;text-align:left;padding:17px;min-height:130px}.strategycard:hover{border-color:var(--purple)}.strategycard h3{margin-bottom:4px}.strategycard p{font-size:11px}.badge{font-size:10px;color:var(--surface-33);background:var(--surface-42);border-radius:6px;padding:4px 7px;display:inline-block}.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.mobile{display:none}.summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:12px}.summary>div{background:var(--surface-27);border:1px solid var(--surface-41);border-radius:10px;padding:13px}.foot{margin-top:25px;color:var(--surface-15);font-size:11px}.hidden{display:none!important}@media(max-width:1100px){.cards{grid-template-columns:repeat(2,1fr)}.grid2{grid-template-columns:1fr}}@media(max-width:740px){header{padding:0 13px}.top{display:none}.mobile{display:inline-block;background:var(--surface-31);border:0;border-radius:7px;padding:7px 10px}.layout{display:block}aside{display:none;position:fixed;top:64px;bottom:0;left:0;width:270px;z-index:10;overflow:auto;box-shadow:10px 0 30px var(--surface-46)}aside.open{display:block}main{padding:23px 14px}.panel{padding:15px}.cards{grid-template-columns:1fr}.grid3,.summary{grid-template-columns:1fr}.librarytools{grid-template-columns:1fr}.legrow{grid-template-columns:1fr 1fr}.head{flex-wrap:wrap}}
.learnhero{background:linear-gradient(125deg,var(--surface-11),var(--surface-30) 70%);border:1px solid var(--surface-5);border-radius:16px;padding:28px;margin-bottom:20px}.learnhero h2{font-size:25px;margin:8px 0}.learnhero .lead{font-size:17px;line-height:1.65;color:var(--surface-43);max-width:850px}.learnhero p{line-height:1.7;max-width:900px}.gloss{display:grid;gap:7px}.gloss details{border:1px solid var(--surface-39);border-radius:8px;padding:9px 12px}.gloss summary{cursor:pointer;color:var(--surface-23);font-weight:600}.gloss details p{font-size:13px;line-height:1.6;margin:8px 0 0}.panel p{line-height:1.7}.panel h3{margin:16px 0 6px}@media(max-width:700px){.learnhero{padding:18px}.learnhero h2{font-size:22px}}.construction-guide{margin-bottom:20px}.construction-guide .tablewrap{margin:14px 0}.construction-guide td,.construction-guide th{white-space:nowrap}.strikekey{padding:13px 15px;border:1px solid var(--surface-20);background:var(--surface-24);border-radius:10px;line-height:1.7;margin:15px 0}.legwhy{border-bottom:1px solid var(--surface-22);padding:10px 0}.legwhy p{margin:3px 0 0;color:var(--surface-17);font-size:13px}.construction-guide .btn{margin-top:15px}
.skip-link{position:absolute;left:12px;top:-60px;z-index:30;background:var(--surface-35);color:var(--surface-27);padding:10px}.skip-link:focus{top:8px}main{min-width:0}button{min-height:44px}@media(max-width:740px){header>.small{display:none}.formgrid{grid-template-columns:1fr}.kv{flex-wrap:wrap}.brand{font-size:16px}}

.panel a{color:var(--surface-36);text-underline-offset:3px}.panel a:focus-visible{outline:2px solid var(--purple);outline-offset:3px}

.preferences{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding:12px 28px;border-bottom:1px solid var(--line);background:var(--panel)}
.preferences label{display:flex;gap:8px;align-items:center}.preferences select{background:var(--bg);color:var(--txt);border:1px solid var(--line);border-radius:8px;padding:7px}
.lesson-list{display:grid;gap:14px;margin-top:22px}.lesson-list .panel{display:flex;gap:18px;align-items:center;justify-content:space-between}.lesson-content{max-width:850px}.lesson-actions{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.progress-track{height:8px;background:var(--line);border-radius:8px;overflow:hidden;margin:14px 0}.progress-track span{display:block;height:100%;background:var(--purple)}.feedback{border-left:3px solid var(--purple);padding:15px;background:var(--panel2);margin-top:15px}.practice-banner{margin-bottom:20px}.lesson-list h2{margin-bottom:5px}
@media(max-width:740px){.preferences{padding:10px 14px}.lesson-list .panel{align-items:flex-start;flex-direction:column}}
.dashboard-section{margin-top:20px}.checklist{display:grid;gap:14px}.checklist label{display:flex;align-items:flex-start;gap:12px;min-height:44px}.checklist input{margin-top:6px;accent-color:var(--purple)}.reflection-entry{padding:16px 0;border-bottom:1px solid var(--line)}.user-reflection{white-space:pre-wrap;overflow-wrap:anywhere}