.tina-ai-v4-wrap{max-width:920px;margin:32px auto;padding:24px;border:1px solid #e5e7eb;border-radius:16px;background:#fff;box-shadow:0 8px 24px rgba(0,0,0,.05)}
.tina-ai-v4-header h2{margin:0 0 8px;font-size:28px}
.tina-ai-v4-header p{margin:0 0 20px;color:#555}
.tina-ai-v4-buttons{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:20px}
.tina-ai-v4-tool-btn{padding:12px 14px;border:1px solid #d1d5db;border-radius:999px;background:#f9fafb;cursor:pointer;font-size:15px}
.tina-ai-v4-tool-btn.active,.tina-ai-v4-tool-btn:hover{background:#111827;color:#fff;border-color:#111827}
.tina-ai-v4-box{padding:20px;border-radius:14px;background:#f9fafb}
.tina-ai-selected-tool{margin-bottom:8px;color:#374151}
.tina-ai-v4-status{margin-bottom:12px;color:#666;font-size:14px}
#tina-ai-v4-user-input{width:100%;min-height:150px;padding:14px;border:1px solid #d1d5db;border-radius:12px;resize:vertical;font-size:16px;box-sizing:border-box}
#tina-ai-v4-submit{margin-top:14px;padding:12px 22px;border:0;border-radius:999px;background:#111827;color:#fff;font-size:16px;cursor:pointer}
#tina-ai-v4-submit:disabled{opacity:.6;cursor:not-allowed}
#tina-ai-v4-loading{margin-top:14px;color:#555}
.tina-ai-v4-answer{margin-top:18px}
.tina-ai-v4-answer-content{padding:18px;border-radius:12px;background:#fff;border:1px solid #e5e7eb;line-height:1.8;white-space:normal}
.tina-ai-v4-error{padding:14px;border-radius:12px;background:#fee2e2;color:#991b1b}
@media(max-width:768px){.tina-ai-v4-buttons{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.tina-ai-v4-buttons{grid-template-columns:1fr}}


.tina-ai-v4-answer-content p{margin:0 0 12px}
.tina-ai-v4-answer-content h1,
.tina-ai-v4-answer-content h2,
.tina-ai-v4-answer-content h3,
.tina-ai-v4-answer-content h4{margin:18px 0 10px;line-height:1.4}
.tina-ai-v4-answer-content ul{margin:8px 0 14px 24px}
.tina-ai-v4-answer-content li{margin:4px 0}
.tina-ai-v4-table-wrap{width:100%;overflow-x:auto;margin:14px 0}
.tina-ai-v4-md-table{width:100%;border-collapse:collapse;background:#fff;font-size:15px}
.tina-ai-v4-md-table th,
.tina-ai-v4-md-table td{border:1px solid #d1d5db;padding:10px;vertical-align:top;text-align:left}
.tina-ai-v4-md-table th{background:#f3f4f6;font-weight:700}
.tina-ai-v4-answer-content code{background:#f3f4f6;padding:2px 5px;border-radius:4px}