:root{color-scheme:light;--bg:#f8fafc;--card:#fff;--text:#0f172a;--accent:#0f766e}*{box-sizing:border-box}body{margin:0;font-family:IBM Plex Sans,sans-serif;background:radial-gradient(circle at top right,#ccfbf1 0,var(--bg) 45%);color:var(--text)}main{max-width:960px;margin:0 auto;padding:2rem 1rem}.card{background:var(--card);border:1px solid #e2e8f0;border-radius:12px;padding:1rem;margin-bottom:1rem}button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:.65rem 1rem;cursor:pointer}input,select{width:100%;padding:.6rem;margin:.3rem 0 .8rem;border:1px solid #cbd5e1;border-radius:8px}