*{box-sizing:border-box}:root{--navy:#071a36;--blue:#0b73e8;--cyan:#39c5f3;--gold:#f2c14e;--ink:#182230;--muted:#667085;--bg:#eef4fb;--card:#fff;--green:#16845b;--orange:#b35c00;--red:#b42318}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:linear-gradient(180deg,#071a36 0 230px,var(--bg) 230px);color:var(--ink)}.top{height:78px;padding:12px clamp(18px,5vw,72px);background:#061429;border-bottom:1px solid #183b69}.top a{display:inline-flex;align-items:center;gap:12px;color:white;text-decoration:none}.top img{width:48px;height:48px;object-fit:contain}.top strong,.top small{display:block}.top small{color:#a9c7e9}.shell{width:min(1180px,calc(100% - 30px));margin:34px auto 70px}.card{background:var(--card);border:1px solid #d7e2ef;border-radius:22px;box-shadow:0 18px 44px rgba(4,26,56,.1)}.login{max-width:560px;margin:60px auto;padding:34px}.eyebrow,.subject small,.homebox small{font-size:.74rem;font-weight:900;letter-spacing:.14em;color:#0b73e8}.login h1,.hero h1{font-size:clamp(2rem,5vw,3.4rem);margin:.35rem 0}.login>p{color:var(--muted);line-height:1.6}form{display:grid;gap:16px;margin-top:24px}label{font-weight:800;color:#344054}input{width:100%;margin-top:7px;padding:15px 16px;border:2px solid #cad8e8;border-radius:13px;font:inherit;font-size:1.05rem}input:focus{outline:3px solid #a7ddff;border-color:#1677ff}button,.coach{border:0;border-radius:13px;padding:14px 18px;font:inherit;font-weight:900;cursor:pointer}#loginBtn,.coach{background:var(--blue);color:#fff;text-decoration:none}.status{min-height:22px;color:var(--red);font-weight:700}.privacy{font-size:.86rem}.hero{padding:28px 30px;display:flex;justify-content:space-between;gap:20px;align-items:center}.hero h1{font-size:2.3rem}.hero p{max-width:680px;color:var(--muted);line-height:1.55}.hero-actions{display:flex;gap:10px;flex-wrap:wrap}.hero-actions button{background:#eef2f6;color:#344054}.sync{margin:15px 0;padding:11px 14px;border-radius:12px;background:#eaf7f1;color:#126046;font-weight:700}.sync.warn{background:#fff3dc;color:#7a4b00}.columns{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:20px}.subject{padding:24px}.subject-head{display:flex;align-items:center;gap:12px;border-bottom:1px solid #e7edf5;padding-bottom:16px}.subject-head>span{display:grid;place-items:center;width:52px;height:52px;background:#edf7ff;border-radius:15px;font-size:1.5rem}.subject h2{margin:2px 0}.path{display:grid;gap:13px;margin-top:18px}.lesson-card{border:1px solid #dbe5f0;border-radius:17px;padding:17px;display:grid;gap:10px}.lesson-top{display:flex;justify-content:space-between;gap:10px}.lesson-code{font-weight:900;color:#0b73e8}.badge{font-size:.73rem;font-weight:900;padding:5px 9px;border-radius:999px;background:#edf4ff;color:#184e91}.state{font-size:.75rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}.state.mastered{color:var(--green)}.state.ready{color:#0b73e8}.state.retry{color:var(--orange)}.state.reteach{color:var(--red)}.state.locked{color:#7d8796}.lesson-card h3{margin:0;font-size:1.08rem}.lesson-card p{margin:0;color:var(--muted);font-size:.91rem;line-height:1.5}.lesson-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.lesson-actions a,.copy-home{font-size:.86rem;font-weight:900;padding:9px 11px;border-radius:10px;text-decoration:none}.lesson-actions a{background:#0b73e8;color:#fff}.copy-home{background:#eef3f8;color:#344054;border:0}.locked .lesson-actions{display:none}.score{margin-left:auto;color:#475467;font-weight:800}.callout{margin-top:18px;padding:22px;border-color:#f5c87a;background:#fff8e8}.homebox{margin-top:20px;padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:20px}.homebox h2{margin:.2rem 0}.homebox p{color:var(--muted);line-height:1.5}.home-link{display:flex;justify-content:space-between;gap:10px;padding:10px 0;border-bottom:1px solid #edf1f5}.home-link button{padding:7px 10px;background:#eef3f8;color:#344054;font-size:.82rem}@media(max-width:800px){body{background:linear-gradient(180deg,#071a36 0 170px,var(--bg) 170px)}.shell{margin-top:20px}.hero,.homebox{grid-template-columns:1fr;display:grid}.columns{grid-template-columns:1fr}.hero-actions{justify-content:flex-start}.login{margin-top:20px;padding:24px}}