:root{color:#111827;background:#f3f4f6;font-family:Inter,system-ui,Arial,sans-serif}*{box-sizing:border-box}body{background:#f3f4f6;margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer;color:#fff;background:#1877f2;border:none;border-radius:10px;padding:12px 16px;font-weight:600}button:disabled{opacity:.6;cursor:not-allowed}img{max-width:100%;display:block}.app-shell{grid-template-columns:260px 1fr;min-height:100vh;display:grid}.sidebar{color:#fff;background:#111827;padding:24px}.sidebar h1{margin-top:0}.sidebar nav{flex-direction:column;gap:12px;display:flex}.sidebar a{color:#d1d5db;border-radius:10px;padding:10px 12px;text-decoration:none}.sidebar a.active,.sidebar a:hover{color:#fff;background:#1f2937}.main-content{padding:32px}.card{background:#fff;border-radius:16px;margin-bottom:20px;padding:20px;box-shadow:0 8px 24px #0000000f}.field{flex-direction:column;gap:8px;margin-bottom:16px;display:flex}.field input,.field select,.field textarea{border:1px solid #d1d5db;border-radius:10px;padding:12px}.grid-2{grid-template-columns:1fr 1fr;gap:16px;display:grid}.caption-option{border:1px solid #e5e7eb;border-radius:12px;margin-top:12px;padding:16px}.post-image{border-radius:12px;width:100%;max-width:320px;margin-top:12px}.error-text{color:#b91c1c}.success-text{color:#047857}@media (width<=900px){.app-shell,.grid-2{grid-template-columns:1fr}}