:root{color-scheme:light;--bg:#f8f7f3;--surface:#fff;--ink:#111827;--muted:#4b5563;--line:#d1d5db;--accent:#0f766e;--accent-hover:#115e59;--danger:#b91c1c}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 20% 0,#e6f7f4 0,#f8f7f3 45%,#efece3 100%);color:var(--ink);font-family:IBM Plex Sans,Segoe UI,sans-serif;min-height:100vh}a{color:var(--accent)}main{max-width:960px;margin:0 auto;padding:2rem 1.25rem 3rem}.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:1rem}.row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}button,input,select{font:inherit}button{border:1px solid var(--line);border-radius:10px;background:#fff;padding:.5rem .75rem;cursor:pointer}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover{background:var(--accent-hover)}button:disabled{opacity:.65;cursor:not-allowed}.error{color:var(--danger)}.muted{color:var(--muted)}