:root{--navy:#16358b;--blue:#3b82f6;--bg:#f6f9ff;--text:#183153;--muted:#667896}*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}header{height:72px;background:white;display:flex;align-items:center;justify-content:space-between;padding:0 7%;box-shadow:0 2px 12px #dbe5f333;position:sticky;top:0;z-index:5}.logo{font-weight:800;color:var(--navy);font-size:22px;text-decoration:none}nav a{margin-left:28px;color:#30415f;text-decoration:none;font-weight:600}.hero{text-align:center;padding:80px 7% 55px;background:linear-gradient(180deg,#f2f7ff,#fff)}.hero h1{font-size:54px;line-height:1.05;margin:0;color:var(--navy)}.hero p{font-size:20px;color:#435a78}.hero input{max-width:680px;width:100%;padding:21px 26px;border:0;border-radius:16px;box-shadow:0 12px 30px #c9d8ee66;font-size:17px}.tabs{margin:-28px auto 40px;max-width:1100px;background:white;border-radius:16px;box-shadow:0 12px 28px #d8e2f266;display:flex;gap:10px;justify-content:space-around;padding:18px;flex-wrap:wrap}.tabs span{font-weight:700;color:#334766}.section{padding:30px 7%}.section h2{font-size:32px;color:var(--navy);margin-bottom:5px}.section>p{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:24px;margin-top:28px}.card{background:white;border:1px solid #e7edf7;border-radius:18px;padding:28px;text-decoration:none;color:var(--text);box-shadow:0 12px 35px #d6e1f255;transition:.2s}.card:hover{transform:translateY(-4px);box-shadow:0 18px 44px #c7d8f3}.card div{font-size:28px;background:#edf5ff;color:var(--blue);display:inline-grid;place-items:center;width:54px;height:54px;border-radius:14px}.card h3{color:var(--navy);font-size:22px}.card p{color:var(--muted);min-height:44px}.card b,.btn{display:block;text-align:center;background:#f3f7fc;color:var(--navy);padding:14px;border-radius:10px;margin-top:20px}.layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:35px;padding:48px 7%}.toolPanel,.side,.info{background:white;border-radius:22px;padding:34px;box-shadow:0 12px 35px #d6e1f255}.toolPanel h1{font-size:42px;color:var(--navy);margin-top:0}.toolBox{background:#f8fbff;border:1px dashed #cfe0f6;border-radius:18px;padding:25px;margin:24px 0}label{font-weight:700;display:block;margin:13px 0 6px}input,select,textarea{width:100%;padding:14px 15px;border:1px solid #d8e2f1;border-radius:12px;font-size:16px;background:white}textarea{min-height:180px}button{cursor:pointer;border:0;background:var(--navy);color:white;padding:14px 20px;border-radius:12px;font-weight:800;margin-top:14px}.result{margin-top:18px;background:#ecfdf3;color:#08603a;border-radius:14px;padding:18px;font-weight:800}.ad{background:#f0f4f9;color:#9aa8bb;text-align:center;padding:35px;border-radius:14px;margin-bottom:20px;font-weight:800}.note{font-size:14px;color:#687a94;background:#fff8e6;border-radius:12px;padding:14px}footer{text-align:center;padding:32px;background:#112554;color:white;margin-top:40px}details{background:#f7faff;margin:12px 0;padding:16px;border-radius:12px}@media(max-width:800px){header{height:auto;display:block;text-align:center;padding:18px}nav{margin-top:12px}nav a{margin:0 8px}.hero h1{font-size:34px}.layout{display:block;padding:25px 5%}.side{margin-top:20px}.toolPanel h1{font-size:32px}}