:root{--bg:#f8f8f8;--card:#ffffff;--border:#e6e6e6;--text:#1b1b1b;--muted:#6b7580;--dark:#2c3540;--accent:#007a4a;--accent-bright:#01ae6a;--btn:#007a4a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}.container{max-width:960px;margin:0 auto;padding:2rem 1.25rem}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.25rem;box-shadow:0 1px 4px rgba(44,53,64,.06)}.muted{color:var(--muted)}.btn{display:inline-block;background:var(--btn);color:#ffffff;font-weight:600;border:none;border-radius:8px;padding:.65rem 1.2rem;cursor:pointer;font-size:1rem}.btn:hover:not(:disabled){background:#00915a}.logo{text-align:center;font-size:1.6rem;font-weight:800;letter-spacing:.02em;margin-bottom:1.4rem;text-transform:uppercase;color:var(--dark)}.logo span{display:inline-block;background:var(--accent-bright);color:#ffffff;border-radius:4px;padding:0 .35rem}.btn:disabled{opacity:.6;cursor:default}input[type=email]{width:100%;padding:.65rem .8rem;border-radius:8px;border:1px solid var(--border);background:#ffffff;color:var(--text);font-size:1rem}input[type=email]:focus{outline:2px solid var(--accent-bright);border-color:transparent}.lesson-list{list-style:none;padding:0;margin:0}.lesson-list li{border-bottom:1px solid var(--border)}.lesson-list a{display:block;padding:.6rem .25rem}.lesson-list a:hover{color:var(--accent)}.player{position:relative;padding-top:56.25%;border-radius:12px;overflow:hidden;background:#000}.player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}