.nast-wrap{max-width:1100px;margin:30px auto;padding:20px;font-family:Arial,sans-serif}.nast-head{display:flex;justify-content:space-between;gap:20px;margin-bottom:25px}.nast-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px}.nast-card{border:1px solid #ddd;border-radius:14px;padding:20px;background:#fff;text-align:left;cursor:pointer;font-size:26px}.nast-card b,.nast-card small{display:block}.nast-card b{font-size:18px;margin-top:8px}.nast-card small{font-size:13px;color:#777;margin-top:4px}.nast-panel{background:#f6f6f7;border-radius:16px;padding:22px;margin-top:24px}.nast-panel label{display:block;font-weight:bold;margin:12px 0 6px}.nast-panel select,.nast-panel textarea{width:100%;box-sizing:border-box;padding:12px;border:1px solid #ccc;border-radius:10px}.nast-btn{display:inline-block;background:#111;color:#fff;padding:12px 18px;border:0;border-radius:10px;margin-top:12px;cursor:pointer;text-decoration:none}.nast-result{white-space:pre-wrap;background:#fff;border:1px solid #ddd;border-radius:10px;padding:15px;margin-top:15px;min-height:120px}.nast-box{max-width:700px;margin:40px auto;padding:30px;border:1px solid #ddd;border-radius:16px;text-align:center}
.nast-card.active{outline:2px solid #111;transform:translateY(-2px)}
.nast-options{margin-top:10px}.nast-options label{display:inline-block}.nast-options select{padding:8px;border:1px solid #ccc;border-radius:8px}
.nast-generated-image{display:block;max-width:100%;height:auto;border-radius:12px;margin:auto}.nast-send{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}

.nast-upload{margin-top:14px;padding:14px;border:1px dashed #bbb;border-radius:12px;background:#fff}
.nast-upload input[type=file]{display:block;margin-top:8px}.nast-upload-preview{display:block;max-width:220px;max-height:220px;margin-top:12px;border-radius:10px}

.nast-external-tools{margin:14px 0;padding:16px;border:1px solid #ddd;border-radius:12px;background:#fff}.nast-external-tools .nast-btn{margin-right:8px;margin-bottom:8px}

.nast-card{cursor:pointer;transition:transform .15s,outline .15s}
.nast-card.active{outline:2px solid #222;transform:translateY(-1px)}
.nast-tool-panel{margin-top:24px}
.nast-external-tools{margin:14px 0;padding:16px;border:1px solid #ddd;border-radius:12px;background:#fff}
.nast-external-tools .nast-btn{margin-right:8px;margin-bottom:8px}

/* Final dashboard layout */
.nast-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
.nast-card{cursor:pointer;transition:transform .15s,box-shadow .15s,outline .15s}
.nast-card.active{outline:2px solid #222;transform:translateY(-2px)}
.nast-panel{margin-top:24px}
.nast-panel-title{font-size:22px;font-weight:700;margin:0 0 14px}
@media(max-width:900px){.nast-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

/* Nexora AI Student Tool — professional 4.5 UI */
.nast-wrap{max-width:1180px;margin:32px auto;padding:0 20px;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.nast-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:28px}
.nast-head h1{margin:0;font-size:34px;line-height:1.15}
.nast-head p{margin:8px 0 0;opacity:.68}
.nast-head>a{font-weight:600;text-decoration:none}
.nast-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.nast-card{appearance:none;border:1px solid #e5e7eb;background:#fff;border-radius:18px;padding:22px 16px;min-height:138px;text-align:left;cursor:pointer;box-shadow:0 4px 16px rgba(0,0,0,.05);transition:.18s ease;display:flex;flex-direction:column;gap:9px}
.nast-card:hover{transform:translateY(-3px);box-shadow:0 10px 25px rgba(0,0,0,.09)}
.nast-card.active{border-color:#111827;box-shadow:0 10px 28px rgba(0,0,0,.12);transform:translateY(-2px)}
.nast-card:first-letter{font-size:25px}
.nast-card b{font-size:16px}
.nast-card small{font-size:13px;opacity:.65;line-height:1.35}
.nast-panel{margin-top:24px;border:1px solid #e5e7eb;border-radius:20px;padding:28px;background:#fff;box-shadow:0 8px 28px rgba(0,0,0,.06)}
.nast-panel-title{margin:0 0 22px;font-size:25px}
.nast-tool-content label{display:block;font-weight:650;margin:0 0 9px}
.nast-tool-content textarea{width:100%;box-sizing:border-box;border:1px solid #d9dee7;border-radius:14px;padding:15px 16px;min-height:170px;font:inherit;resize:vertical}
.nast-upload{margin-top:18px;padding:18px;border:1px dashed #cbd5e1;border-radius:14px;background:#fafafa}
.nast-upload input[type=file]{display:block;margin:10px 0}
.nast-upload small{display:block;opacity:.65}
.nast-upload-preview{display:block;max-width:240px;max-height:240px;margin-top:14px;border-radius:12px;object-fit:cover}
.nast-external-tools{margin-top:20px;padding:22px;border-radius:16px;background:#f8fafc;border:1px solid #e2e8f0}
.nast-external-tools p{margin-top:0;opacity:.72}
.nast-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 18px;background:#111827;color:#fff;text-decoration:none;font-weight:650;cursor:pointer;margin:6px 6px 0 0}
.nast-btn:hover{opacity:.9;color:#fff}
.nast-result{margin-top:20px;padding:18px;border-radius:14px;background:#f8fafc;white-space:pre-wrap;line-height:1.6;min-height:60px}
@media(max-width:900px){.nast-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.nast-head h1{font-size:28px}}
@media(max-width:520px){.nast-grid{grid-template-columns:1fr}.nast-wrap{padding:0 12px}.nast-panel{padding:18px}}

/* v4.6 — Image/Video tools: clean studio-only card */
.nast-panel.nast-external-only{
  background:transparent;
  border:0;
  box-shadow:none;
  padding:0;
  margin-top:26px;
}
.nast-panel.nast-external-only .nast-panel-title,
.nast-panel.nast-external-only .nast-tool-content > label,
.nast-panel.nast-external-only #nast-prompt,
.nast-panel.nast-external-only #nast-prompt-upload,
.nast-panel.nast-external-only #nast-generate,
.nast-panel.nast-external-only #nast-result{
  display:none !important;
}
.nast-panel.nast-external-only .nast-external-tools{
  display:flex !important;
  align-items:center;
  justify-content:center;
  min-height:150px;
  margin:0 auto;
  padding:30px;
  max-width:680px;
  background:#fff;
  border:1px solid #e5e7eb;
  border-radius:22px;
  box-shadow:0 10px 35px rgba(0,0,0,.07);
}
.nast-panel.nast-external-only #nast-external-help{display:none}
.nast-panel.nast-external-only .nast-external-tools .nast-btn{
  margin:0;
  padding:15px 24px;
  font-size:16px;
  border-radius:14px;
}


/* v4.7 professional tool actions */
.nast-external-actions{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}
.nast-btn-secondary{background:#eef2f7;color:#111827;border:1px solid #d7dee8}
.nast-btn-secondary:hover{color:#111827;background:#e5eaf1}
.nast-note{display:block;text-align:center;margin-top:12px;opacity:.58;line-height:1.4}
@media(max-width:620px){.nast-external-actions{flex-direction:column}.nast-external-actions .nast-btn{width:100%;box-sizing:border-box;margin:0}}

/* v4.8 — separate Watermark Remover + Student Resources */
.nast-resources-box{margin-top:0;padding:24px;border:1px solid #e5e7eb;border-radius:20px;background:#fff;box-shadow:0 10px 35px rgba(0,0,0,.07)}
.nast-resources-intro{margin:0 0 18px;opacity:.72;line-height:1.6}
.nast-resource-list{display:grid;gap:10px}
.nast-resource-item{display:flex;align-items:center;gap:12px;padding:15px 16px;border:1px solid #e5e7eb;border-radius:14px;text-decoration:none;color:#111827;background:#f8fafc;transition:.15s ease}
.nast-resource-item:hover{transform:translateY(-1px);box-shadow:0 5px 18px rgba(0,0,0,.06);color:#111827}
.nast-resource-item strong{flex:1}
.nast-resource-open{font-size:13px;opacity:.65}
.nast-resource-empty{padding:18px;border-radius:12px;background:#f8fafc;text-align:center;opacity:.6}
.nast-panel.nast-external-only .nast-external-tools{min-height:130px}