:root{color-scheme:light;--ink:#142636;--accent:#176a71;--paper:#f5f7f4;--line:#d6e0df}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.55}main{max-width:1100px;margin:4rem auto;padding:2rem}h1{font-size:clamp(2.2rem,5vw,4rem);line-height:1.1}a{color:var(--accent)}footer{border-top:1px solid var(--line);text-align:center;font-size:.8rem}.panel,footer{padding:1.5rem}.panel{background:white;border:1px solid var(--line);border-radius:12px;margin:1rem 0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:1rem;gap:1rem}table{width:100%;border-collapse:collapse}td,th{text-align:left;border-bottom:1px solid var(--line);padding:.7rem}button,input{padding:.7rem;border:1px solid var(--line);border-radius:5px}button{background:var(--accent);color:white;cursor:pointer}nav{display:flex;gap:1rem}button:disabled{opacity:.45;cursor:not-allowed}