:root{--teal:#0d5c4d;--teal-dark:#083f36;--paper:#f4f1ea;--ink:#1c1f1c;--mint:#c8e6dc;--coral:#c45c3e;--line:#d7d0c4;--white:#fffefb}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:Noto Sans Bengali,SolaimanLipi,Kalpurush,Georgia,serif;background:var(--paper);color:var(--ink);line-height:1.55}header{background:linear-gradient(135deg,var(--teal-dark),var(--teal));color:white;padding:18px 20px}.brand{display:flex;gap:14px;align-items:center;max-width:980px;margin:0 auto}.logo{width:46px;height:46px;border-radius:10px;background:#f4c430;color:var(--teal-dark);display:grid;place-items:center;font-weight:800;font-size:22px}header h1{margin:0;font-size:18px;font-weight:700}header p{margin:2px 0 0;opacity:.9;font-size:13px}main{max-width:980px;margin:0 auto;padding:22px 16px 64px}.hero{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:22px;margin-bottom:18px}.badge{display:inline-block;background:var(--mint);color:var(--teal-dark);font-size:12px;padding:4px 10px;border-radius:999px;margin-bottom:8px}.tabs{display:flex;gap:8px;margin:16px 0}.tabs button{border:1px solid var(--line);background:white;padding:8px 14px;border-radius:999px;cursor:pointer;font:inherit}.tabs button.active{background:var(--teal);color:white;border-color:var(--teal)}.card,form{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:20px}.grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}.full{grid-column:1/-1}label{display:block;font-size:13px;margin-bottom:4px;color:#334}input,select,textarea{width:100%;padding:10px 11px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff}textarea{min-height:90px;resize:vertical}button.primary{margin-top:14px;background:var(--teal);color:white;border:0;padding:11px 18px;border-radius:10px;font:inherit;cursor:pointer}button.primary:disabled{opacity:.6;cursor:not-allowed}.notice{margin-top:14px;padding:12px 14px;border-radius:10px;background:#eef7f3;border:1px solid var(--mint)}.error{background:#fdecea;border-color:#f3c0b6}.track-result{margin-top:16px}.kv{display:grid;grid-template-columns:160px 1fr;grid-gap:6px 12px;gap:6px 12px;font-size:15px}.kv b{color:#445;font-weight:600}footer{text-align:center;color:#667;font-size:12px;padding:8px 16px 28px}@media (max-width:700px){.grid,.kv{grid-template-columns:1fr}}