:root{
  --bg:#0b0f19; --card:#121928; --text:#e8ecf1; --muted:#9aa4b2; --accent:#6ea8fe; --accent2:#22d3ee; --danger:#ef4444;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg);color:var(--text)}
.container{max-width:980px;margin:0 auto;padding:32px}
header{margin-bottom:16px}
h1{margin:0 0 8px;font-size:28px}
.subtitle{margin:0;color:var(--muted)}
.card{background:var(--card);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:24px;margin:20px 0;box-shadow:0 14px 36px rgba(0,0,0,.28)}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width: 820px){.grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:8px}
label{font-weight:600}
input[type="text"], input[type="password"], textarea{width:100%;padding:10px 12px;border-radius:10px;border:1px solid rgba(255,255,255,.08);background:#0e1524;color:var(--text);outline:none}
input[type="file"]{color:var(--muted)}
.checkbox{display:flex;align-items:center;gap:8px;color:var(--muted);font-weight:500}
.file-row{display:flex;flex-direction:column;gap:8px}
.actions{display:flex;gap:10px;justify-content:flex-end;margin-top:10px}
button{appearance:none;border:none;border-radius:10px;padding:10px 16px;font-weight:700;cursor:pointer}
button.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#06101a}
button.primary:hover{filter:brightness(1.05)}
.button{display:inline-block;text-align:center;appearance:none;border:none;border-radius:10px;padding:10px 16px;font-weight:700;cursor:pointer}
.button.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#06101a}
.button.primary:hover{filter:brightness(1.05)}
.progress{position:relative;height:12px;background:#0e1524;border-radius:999px;overflow:hidden;border:1px solid rgba(255,255,255,.08)}
.bar{position:absolute;left:0;top:0;height:100%;background:linear-gradient(90deg,var(--accent2),var(--accent));width:0%}
.stats{display:flex;gap:16px;margin:10px 0;color:var(--muted)}
pre{white-space:pre-wrap;word-break:break-word;background:#0e1524;border-radius:8px;padding:10px;border:1px solid rgba(255,255,255,.06)}

.preview{display:flex;justify-content:flex-start}
.bubble{max-width:520px;background:#0e1524;border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px;box-shadow:0 10px 20px rgba(0,0,0,.2)}
.bubble img{max-width:100%;border-radius:8px;margin-bottom:8px}
.bubble .caption{white-space:pre-wrap;line-height:1.45}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px;position:relative}
@media (min-width: 981px){
  .two-col::after{content:"";position:absolute;top:0;bottom:0;left:50%;width:1px;background:rgba(255,255,255,.16);transform:translateX(-0.5px)}
}
@media (max-width: 980px){.two-col{grid-template-columns:1fr}}
.left-col h2{margin-top:0}
.right-col .field{margin-bottom:16px}
.divider{height:1px;background:rgba(255,255,255,.16);margin:20px 0}
.test-grid{display:grid;grid-template-columns:1fr auto;gap:10px}
.muted{color:var(--muted);margin-left:10px}
.upload-row{display:flex;align-items:center;gap:10px}
textarea{resize:none}