:root{
  --dark:#1d706d;
  --light:#62bbb8;
  --bg:#eef3f8;
  --card:#ffffff;
  --text:#223635;
  --muted:#667a79;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,sans-serif;background:var(--bg);color:var(--text)}
.topbar{background:var(--dark);color:#fff;padding:22px 28px;display:flex;justify-content:space-between;align-items:center}
.topbar h1{margin:0;font-family:Georgia,serif;font-size:28px}
.topbar p{margin:4px 0 0;font-family:Georgia,serif;font-style:italic}
.badge{background:var(--light);padding:7px 14px;border-radius:18px;font-weight:700;letter-spacing:1px}
.container{max-width:940px;margin:38px auto;padding:0 18px}
.intro{background:#fff;border:1px solid #d2dde5;border-radius:16px;padding:24px;margin-bottom:20px}
.intro h2{margin:0 0 8px;color:var(--dark);font-family:Georgia,serif}
.intro p{margin:0;color:var(--muted);line-height:1.55}
.upload{background:#fff;border:2px dashed var(--light);border-radius:16px;padding:60px 20px;text-align:center;cursor:pointer}
.upload.drag{background:#f3fbfa}
.folder{font-size:44px}
.upload h2{margin:10px 0 6px;color:var(--dark);font-family:Georgia,serif}
.upload p{margin:0;color:var(--muted);font-style:italic}
button{border:0;border-radius:12px;padding:16px 22px;font-size:16px;font-weight:700;cursor:pointer}
.primary{background:var(--dark);color:#fff}
.secondary{background:#8ca8a6;color:#fff}
#generateBtn{width:100%;margin-top:20px}
#generateBtn:disabled{opacity:.4;cursor:not-allowed}
.status{margin-top:20px;padding:16px;background:#fff;border-radius:12px;border:1px solid #cfd9e2}
.hidden{display:none!important}
.preview-actions{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}
#previewFrame{width:100%;height:820px;border:1px solid #cfd9e2;border-radius:14px;background:#fff}