:root {
  --brand:#1e3a8a;
  --brand-200:#93c5fd;
  --text:#0f172a;
  --bg:#f9fafb;
  --card:#ffffff;
  --border:#e5e7eb;
}

body {margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text);}
h1{font-size:1.875rem;margin:0 0 .75rem}
h2{font-size:1.25rem;margin:0 0 .5rem}

/* Header/Footer */
.header{background:var(--brand);color:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}
.header a{color:#fff;text-decoration:none;margin-left:1rem}
.header a:hover{color:var(--brand-200)}
.footer{background:var(--brand);color:#fff;padding:1rem 2rem;text-align:center}
.footer a{color:#fff;margin:0 .5rem}
.footer a:hover{color:var(--brand-200)}

/* Layout */
.container{max-width:900px;margin:0 auto;padding:24px 16px}
.intro{margin-bottom:16px}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px;margin:16px 0;box-shadow:0 6px 18px rgba(0,0,0,.05)}
.list{padding-left:18px}

/* Buttons */
.btn{display:inline-block;padding:.6rem 1rem;border-radius:999px;border:1px solid transparent;background:var(--brand);color:#fff;font-weight:600;cursor:pointer}
.btn:hover{opacity:.9}
.btn.ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}

/* Dropzone */
.dropzone{border:2px dashed var(--border);border-radius:16px;padding:18px;text-align:center;background:#fafafa;margin-top:10px}
.dropzone span{display:block;margin:.5rem 0;color:#64748b}
#fileInput{display:none}

/* Controls */
.controls{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:14px 0}
.controls label{font-weight:600}
.controls select{padding:.45rem .6rem;border:1px solid var(--border);border-radius:10px}

/* Actions */
.actions{display:flex;gap:10px;margin:10px 0}

/* File list */
.file-list{list-style:none;padding:0}
.file-list li{display:flex;justify-content:space-between;align-items:center;padding:8px 10px;border:1px solid var(--border);border-radius:10px;margin:8px 0;background:#fff}
.status{margin-top:8px;color:#475569}

/* FAQ */
details{border:1px solid var(--border);border-radius:12px;padding:10px;margin:10px 0;background:#fff}
details summary{cursor:pointer;font-weight:600}

/* Thumbnail small */
.thumb{text-align:center;margin:20px 0}
.small-thumb img{max-width:400px;height:auto;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.08)}
.thumb .muted{color:#475569;font-size:.9rem;margin-top:6px}

/* Responsive */
@media(max-width:768px){
  .header{flex-direction:column;text-align:center}
  .controls{grid-template-columns:1fr}
  .small-thumb img{max-width:90%}
}