:root{font-size:18px;--blue:#143974;--teal:#087e85;--paper:#faf8f2;--border:#dce3e7}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:#22364b;font-family:system-ui,sans-serif;line-height:1.55}header{padding:18px max(20px,calc((100% - 1000px)/2));background:white;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:16px}.brand{font-weight:750;color:var(--blue);text-decoration:none}.brand small{display:block;font-size:.75rem;color:#8c6520;font-weight:500}main{max-width:1000px;margin:auto;padding:30px 22px 120px}h1,h2,h3{color:var(--blue);line-height:1.2}h1{font-size:2rem}h2{font-size:1.4rem}h3{font-size:1.1rem}button,.button{font:inherit;cursor:pointer;border:1px solid var(--border);border-radius:12px;background:white;padding:12px 18px;color:var(--blue);display:inline-block;text-decoration:none}button:hover,.button:hover{border-color:var(--teal)}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #c48919;outline-offset:3px}.primary{background:var(--teal);color:white;border-color:var(--teal);font-weight:650}.card{padding:24px;background:white;border:1px solid var(--border);border-radius:18px;margin:16px 0;box-shadow:0 4px 14px #16364805}.hero{background:linear-gradient(120deg,#e5f4f3,#fff4db);padding:30px;border-radius:22px}.eyebrow{font-size:.8rem;text-transform:uppercase;letter-spacing:.09em;color:var(--teal);font-weight:700}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.grid .card{margin:0}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.muted{font-size:.85rem;color:#52677a}.phrase{font-size:1.6rem;font-weight:750;color:var(--blue);margin:12px 0}progress{width:100%;height:12px;accent-color:var(--teal)}nav{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;background:white;border-top:1px solid var(--border);padding:10px 0 max(10px,env(safe-area-inset-bottom));z-index:5}nav a{width:150px;text-align:center;text-decoration:none;color:#52677a;font-size:1.4rem}nav span{display:block;font-size:.75rem}nav a.active{color:var(--teal);font-weight:750}.answer{display:block;width:100%;text-align:left;margin:10px 0}.success{background:#e8f5e8;border-color:#69a36d}.error{background:#fff0df;border-color:#b87b34}.notice{padding:12px 16px;border-left:4px solid #bf912e;background:#fff7e5;font-size:.85rem}.source{white-space:pre-wrap;font-size:.95rem;overflow-wrap:anywhere}.source summary{white-space:normal;font-weight:650;cursor:pointer;color:var(--blue)}textarea,input,select{font:inherit;max-width:100%;padding:12px;border:1px solid var(--border);border-radius:10px}textarea{width:100%;min-height:150px}video,img{max-width:100%;border-radius:14px}audio{width:100%;margin:12px 0}.chapter-number{display:inline-grid;place-items:center;width:40px;height:40px;background:#fff1d4;border-radius:50%;margin-right:10px}footer{margin-top:26px;font-size:.8rem;color:#52677a}.hidden{display:none}button:disabled{opacity:.55;cursor:default}@media(max-width:640px){.grid{grid-template-columns:1fr}main{padding:20px 16px 110px}.card{padding:20px}h1{font-size:1.65rem}header{padding:14px 16px}.brand{font-size:.95rem}.hero{padding:22px}nav a{width:25%}}
.home-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.home-heading h1{margin:4px 0;font-size:1.6rem}.home-heading .button{padding:9px 14px;font-size:.85rem;white-space:nowrap}.resume-line{font-size:.8rem;color:#52677a;margin:8px 0 18px}.activity-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.activity-tile{display:flex;flex-direction:column;text-decoration:none;color:#143974;border:1px solid #14397412;border-radius:17px;padding:18px;min-height:145px;transition:transform .15s}.activity-tile:hover{transform:translateY(-2px);border-color:var(--teal)}.activity-tile strong{font-size:1rem;margin:5px 0}.activity-tile>span:last-of-type{font-size:.75rem;color:#3e566e}.tile-icon{font-size:1.6rem;line-height:1.2}.activity-tile small{font-size:.65rem;margin-top:6px;color:#715720}.mint{background:#e3f3e9}.lavender{background:#eee8fa}.peach{background:#ffeadb}.pink{background:#fae5ed}.sky{background:#e2effb}.butter{background:#fff3cf}.lesson-list{display:grid;gap:9px}.lesson-row{display:grid;grid-template-columns:40px 1fr 16px;gap:13px;align-items:center;background:white;padding:14px 16px;border:1px solid var(--border);border-radius:12px;text-decoration:none;color:var(--blue)}.lesson-row .chapter-number{margin:0}.lesson-row strong{font-size:.95rem}.lesson-row .muted{display:block;font-size:.75rem;margin-top:4px}.quiz-picture{display:block;width:100%;max-width:300px;height:230px;object-fit:contain;margin:auto}#text-size{white-space:nowrap;padding:8px 12px;font-size:1rem;min-width:48px}header{padding-top:12px;padding-bottom:12px}.brand small{font-size:.7rem}@media(max-width:800px){.activity-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:540px){.activity-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.activity-tile{padding:14px;min-height:126px}.activity-tile strong{font-size:.95rem}.activity-tile>span:last-of-type{font-size:.7rem}.home-heading h1{font-size:1.4rem}.brand small{font-size:.65rem}.lesson-row{padding:12px;gap:9px}main{padding-top:16px}}