:root{--bg:#f5f8ff;--ink:#1e293b;--primary:#0f766e;--accent:#f59e0b;--muted:#64748b;--card:#ffffff;--border:#dbe3f1}*{box-sizing:border-box}body{margin:0;font-family:IBM Plex Sans,Segoe UI,sans-serif;color:var(--ink);background:radial-gradient(circle at 20% 0,#e4f4ef 0,#f5f8ff 45%,#fef9f1 100%);min-height:100vh}a{color:inherit}main{max-width:960px;margin:0 auto;padding:2rem 1rem 4rem}.nav{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.2rem;border-bottom:1px solid var(--border);background:rgba(255,255,255,.85);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:-webkit-sticky;position:sticky;top:0;z-index:10}.nav-links{display:flex;gap:.9rem;font-size:.95rem;color:var(--muted)}.card{border:1px solid var(--border);background:var(--card);border-radius:14px;padding:1rem;box-shadow:0 10px 24px rgba(15,23,42,.06)}.grid{display:grid;grid-gap:1rem;gap:1rem}.grid.two{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.button{border:0;border-radius:10px;padding:.7rem 1rem;font-weight:600;background:var(--primary);color:#fff;cursor:pointer}.button.secondary{background:#0f172a}.button:disabled{opacity:.55;cursor:not-allowed}.input,.textarea{width:100%;border:1px solid var(--border);border-radius:10px;padding:.7rem;font:inherit}.footer-note{margin-top:2rem;color:var(--muted);font-size:.9rem}