.dst-app{max-width:1100px;margin:20px auto;display:grid;grid-template-columns:360px 1fr;gap:28px;font-family:Arial,"Noto Sans Bengali",sans-serif}
.dst-form{background:#fff;border:1px solid #ddd;border-radius:14px;padding:22px;box-shadow:0 5px 20px rgba(0,0,0,.06)}
.dst-form h2{margin:0 0 18px;font-size:22px;line-height:1.35}
.dst-form label{display:block;font-weight:700;margin:14px 0 7px}
.dst-form input,.dst-form textarea{width:100%;box-sizing:border-box;border:1px solid #ccc;border-radius:9px;padding:10px;font-size:15px}
.dst-form textarea{min-height:100px;resize:vertical}
.dst-buttons{display:flex;gap:8px;margin-top:18px;flex-wrap:wrap}
.dst-buttons button{border:0;border-radius:9px;padding:11px 15px;cursor:pointer;font-weight:700}
#dst-generate{background:#111;color:#fff}
#dst-download{background:#087f23;color:#fff}
#dst-download:disabled{opacity:.45;cursor:not-allowed}
.dst-note{font-size:12px;color:#666;line-height:1.5}
.dst-preview-wrap{display:flex;justify-content:center;align-items:flex-start;background:#f2f2f2;border-radius:14px;padding:18px;overflow:auto}
.dst-card{width:800px;min-width:800px;background:#fff;border-radius:0;overflow:hidden;box-shadow:0 5px 25px rgba(0,0,0,.15)}
.dst-card-header{height:92px;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:7px solid #d71920;box-sizing:border-box}
.dst-brand{font-weight:900;font-size:31px;color:#111}
.dst-date{font-size:16px;color:#555}
.dst-image-area{width:100%;height:450px;background:#e9e9e9;display:flex;align-items:center;justify-content:center;overflow:hidden}
.dst-image-area img{width:100%;height:100%;object-fit:cover}
.dst-placeholder{color:#777;font-size:22px}
.dst-card-title{font-weight:900;font-size:34px;line-height:1.35;padding:24px 30px 20px;color:#111}
.dst-card-footer{display:flex;justify-content:space-between;gap:20px;background:#111;color:#fff;padding:14px 24px;font-size:17px}
.dst-login-required{padding:20px;border:1px solid #ddd;border-radius:10px;background:#fafafa}
@media(max-width:850px){.dst-app{grid-template-columns:1fr}.dst-card{transform-origin:top left;}.dst-preview-wrap{justify-content:flex-start}}