:root{--color-bg:#0b0b0c;--color-fg:#f5f5f5;--color-accent:#6c5ce7}*{box-sizing:border-box}body{margin:0;background:var(--color-bg);color:var(--color-fg);font-family:system-ui,-apple-system,Segoe UI,sans-serif}main{max-width:720px;margin:0 auto;padding:4rem 1.5rem}form{display:flex;flex-direction:column;gap:.75rem;margin-top:2rem}input,textarea{padding:.75rem;border-radius:8px;border:1px solid #333;background:#17171a;color:var(--color-fg);font:inherit}button{padding:.75rem 1.5rem;border-radius:8px;border:none;background:var(--color-accent);color:#fff;font-weight:600;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}