:root{color-scheme:light;font-family:IBM Plex Sans,Segoe UI,system-ui,sans-serif;background-color:#f6f4ef;color:#1f1f1f}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top,#fff,#f6f4ef 60%)}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;justify-content:space-between;padding:1.5rem 2rem;border-bottom:1px solid #e2ddd2;background:#fdfbf7}.brand{font-weight:700;letter-spacing:.08em}.nav{display:flex;gap:1rem}.nav-link{text-decoration:none;color:#333;font-weight:500}.nav-link.active{color:#0b5c6b;border-bottom:2px solid #0b5c6b;padding-bottom:.2rem}.app-main{padding:2rem;max-width:960px;width:100%;margin:0 auto}.page h1{margin:0 0 .5rem}.muted{color:#666}.card{background:#fff;border:1px solid #e5e0d6;border-radius:12px;padding:1.5rem;margin-top:1.5rem;box-shadow:0 12px 30px #2828280f}.form{display:grid;gap:1rem}.form label{display:grid;gap:.5rem;font-weight:500}.form input,.form select{padding:.6rem .7rem;border-radius:8px;border:1px solid #d5d1c7}.form button,.button{display:inline-flex;align-items:center;justify-content:center;padding:.7rem 1.2rem;border-radius:999px;border:none;background:#0b5c6b;color:#fff;font-weight:600;cursor:pointer;text-decoration:none}.form button:disabled{opacity:.6;cursor:not-allowed}.error{background:#ffe7e3;border:1px solid #ffb8ad;padding:.75rem;border-radius:8px;color:#8a2c1c}.result-grid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin-bottom:1rem}.label{font-size:.85rem;color:#666;display:block;margin-bottom:.3rem}.result-block{margin-top:1rem}pre{background:#f7f5f0;padding:.8rem;border-radius:8px;overflow-x:auto}@media (max-width: 600px){.app-header{flex-direction:column;align-items:flex-start;gap:1rem}.app-main{padding:1.5rem}}