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0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px 0 rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04)}.dark-mode{--bg-primary: #1f2937;--bg-secondary: #111827;--bg-tertiary: #374151;--card-bg: #ffffff;--hover-bg: #f3f4f6;--text-primary: #f9fafb;--text-secondary: #6b7280;--text-tertiary: #9ca3af;--dark-color: #111827;--border-color: #e5e7eb;--shadow: 0 1px 3px 0 rgba(0, 0, 0, .3), 0 1px 2px 0 rgba(0, 0, 0, .2);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3), 0 4px 6px -2px rgba(0, 0, 0, .2);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .3), 0 10px 10px -5px rgba(0, 0, 0, .2)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-secondary);color:var(--text-primary);transition:background-color .3s ease,color .3s ease}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-tertiary)}::-webkit-scrollbar-thumb{background:var(--text-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.container{max-width:1400px;margin:0 auto;padding:0 20px}.btn{padding:10px 20px;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500;transition:all .3s ease;display:inline-flex;align-items:center;gap:8px}.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-danger{background-color:var(--danger-color);color:#fff}.btn-outline{background-color:transparent;border:2px solid var(--primary-color);color:var(--primary-color)}.card{background:var(--bg-primary);border-radius:8px;padding:20px;box-shadow:var(--shadow);transition:background-color .3s ease}.input-group{margin-bottom:20px}.input-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-secondary)}.input-group input,.input-group textarea,.input-group select{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:6px;font-size:14px;transition:border-color .3s ease,background-color .3s ease,color .3s ease;background-color:var(--bg-primary);color:var(--text-primary)}.input-group input:focus,.input-group textarea:focus,.input-group select:focus{outline:none;border-color:var(--primary-color)}.error-message{color:var(--danger-color);font-size:14px;margin-top:5px}.success-message{color:var(--secondary-color);font-size:14px;margin-top:5px}.spinner{border:3px solid #f3f3f3;border-top:3px solid var(--primary-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:20px auto}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--bg-primary);border-radius:12px;padding:30px;max-width:600px;width:90%;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-xl);transition:background-color .3s ease}@media (max-width: 768px){.container{padding:0 15px}.btn{padding:8px 16px;font-size:13px}}