:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#090b10;--panel:#121722;--panel-2:#18202f;--text:#f4f7fb;--muted:#98a4b7;--accent:#76e4b5;--accent-2:#7aa7ff;--danger:#ff7a90}*{box-sizing:border-box}body{background:radial-gradient(circle at top left, #17243a, var(--bg) 38%);color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}a[href]{cursor:pointer}.container{max-width:1040px;margin:0 auto;padding:32px 20px}.nav{justify-content:space-between;align-items:center;margin-bottom:32px;display:flex}.logo{letter-spacing:-.04em;font-size:24px;font-weight:800}.nav-links{color:var(--muted);gap:14px;display:flex}.card{background:#121722e0;border:1px solid #ffffff14;border-radius:24px;padding:24px;box-shadow:0 20px 60px #00000047}a.card{transition:transform .15s,border-color .15s;display:block}a.card:hover{border-color:#76e4b573;transform:translateY(-2px)}.grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;display:grid}.muted{color:var(--muted)}.badge{color:var(--accent);background:#76e4b51f;border-radius:999px;padding:6px 10px;font-size:13px;display:inline-flex}.button{background:var(--accent);color:#06100c;cursor:pointer;border:0;border-radius:14px;justify-content:center;align-items:center;min-height:44px;padding:12px 16px;font-weight:750;display:inline-flex}.button:hover{filter:brightness(1.06)}.button.secondary{background:var(--panel-2);color:var(--text);border:1px solid #ffffff14}.lesson-list{gap:12px;margin-top:18px;display:grid}.lesson-row{background:var(--panel);border:1px solid #ffffff14;border-radius:16px;justify-content:space-between;align-items:center;gap:12px;padding:16px;transition:border-color .15s,transform .15s;display:flex}.lesson-row:hover{border-color:#76e4b573;transform:translateY(-1px)}.prose{font-size:18px;line-height:1.7}.prose h1,.prose h2,.prose h3{letter-spacing:-.03em;line-height:1.15}.prose code{background:#202838;border-radius:8px;padding:2px 6px}.quiz{gap:16px;margin-top:28px;display:grid}.option{text-align:left;background:var(--panel-2);width:100%;color:var(--text);cursor:pointer;border:1px solid #ffffff14;border-radius:14px;padding:14px;display:block}textarea,input{width:100%;color:var(--text);font:inherit;background:#0e131d;border:1px solid #ffffff1f;border-radius:14px;padding:12px}textarea{min-height:520px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:14px}.form{gap:14px;display:grid}