:root{--fg:#111;--bg:#fafaf7;--muted:#666;--accent:#111;--border:#ddd;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--fg);min-height:100vh}main{max-width:480px;margin:0 auto;padding:4rem 1.5rem}h1{font-size:1.5rem;font-weight:600;letter-spacing:-.01em;margin:0 0 .5rem}p{color:var(--muted);line-height:1.6;margin:0 0 1rem}button,input{font:inherit}input[type=email],input[type=text]{width:100%;padding:.75rem 1rem;border:1px solid var(--border);border-radius:6px;background:white}button{padding:.75rem 1.25rem;border:0;border-radius:6px;background:var(--accent);color:white;cursor:pointer;font-weight:500}button:disabled{opacity:.5;cursor:not-allowed}.field{display:flex;flex-direction:column;gap:.5rem;margin-bottom:1rem}.error{color:#c0392b;font-size:.9rem;margin-top:.25rem}.days{display:grid;grid-template-columns:repeat(7,1fr);grid-gap:.5rem;gap:.5rem;margin:1.5rem 0}.day{display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:.75rem .25rem;border:1px solid var(--border);border-radius:6px;background:white;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none}.day.on{background:var(--accent);color:white;border-color:var(--accent)}.day-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em}