:root{--background:#f5f3ee;--foreground:#191919;--muted:#696969;--border:#dedbd3;--surface:#fff;--accent:#191919}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{background:var(--background);color:var(--foreground);font-family:Arial,Helvetica,sans-serif;line-height:1.5}a{color:inherit}button,input{font:inherit}button{cursor:pointer}.shell{width:min(960px,100% - 40px);margin:0 auto;padding:48px 0 80px}.header{justify-content:space-between;align-items:center;gap:24px;margin-bottom:56px;display:flex}.brand{letter-spacing:.12em;font-size:14px;font-weight:700}h1,h2,p{margin-top:0}h1{letter-spacing:-.035em;margin-bottom:12px;font-size:clamp(32px,6vw,52px);line-height:1.05}h2{font-size:20px}.muted{color:var(--muted)}.course-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:32px;display:grid}.card,.panel,.lesson{border:1px solid var(--border);background:var(--surface);border-radius:12px}.card{padding:24px;text-decoration:none;display:block}.card:hover{border-color:#9b978e}.card p:last-child,.lesson p:last-child{margin-bottom:0}.panel{width:min(460px,100% - 40px);margin:10vh auto 0;padding:32px}.form{gap:14px;margin-top:28px;display:grid}label{font-size:14px;font-weight:700}input{border:1px solid var(--border);background:#fff;border-radius:8px;width:100%;padding:12px 14px}.button{border:1px solid var(--accent);background:var(--accent);color:#fff;border-radius:8px;padding:11px 16px}.button.secondary{color:var(--foreground);background:0 0}.message{background:#eef3e9;border-radius:8px;margin-top:20px;padding:12px}.error{background:#f8e7e5}.back-link{margin-bottom:32px;display:inline-block}.lesson-list{gap:16px;margin-top:32px;display:grid}.lesson{padding:24px}.video-placeholder{color:#bbb;text-align:center;background:#222;border-radius:8px;place-items:center;min-height:240px;margin:18px 0;display:grid}.resources{margin-bottom:0;padding-left:20px}@media (max-width:560px){.shell{width:min(100% - 28px,960px);padding-top:28px}.header{margin-bottom:40px}.panel{margin-top:20px;padding:24px}}