:root{--bg: #f5f7f3;--ink: #173220;--accent: #1f6f4a;--panel: #ffffff}*{box-sizing:border-box}body{margin:0;font-family:IBM Plex Sans,Segoe UI,sans-serif;background:radial-gradient(circle at top right,#dbeee3,var(--bg) 40%);color:var(--ink);min-height:1800px}main{max-width:860px;margin:0 auto;padding:24px}.hero,.scenarios{background:var(--panel);border-radius:16px;padding:20px;margin-bottom:20px}button{border:0;border-radius:12px;padding:10px 14px;background:var(--accent);color:#fff;cursor:pointer}.scenario-item{border:1px solid #d9e6dc;border-radius:12px;padding:12px;margin-bottom:10px}.sticky{position:fixed;right:16px;bottom:16px;z-index:1000}.hidden{display:none}