*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:#f5f5f5;color:#333;line-height:1.6}.app-container{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding:20px;max-width:1200px;margin:0 auto;width:100%}.game-card{border-radius:8px;overflow:hidden;box-shadow:0 2px 8px #0000001a;transition:transform .2s ease,box-shadow .2s ease}.game-card:hover{transform:translateY(-2px);box-shadow:0 4px 16px #00000026}.upload-area{border:2px dashed #d9d9d9;border-radius:8px;padding:40px;text-align:center;background:#fafafa;transition:border-color .3s ease}.upload-area:hover{border-color:#1890ff}.upload-area.dragover{border-color:#1890ff;background:#e6f7ff}.game-iframe{width:100%;height:600px;border:none;border-radius:8px;box-shadow:0 2px 8px #0000001a}@media (max-width: 768px){.main-content{padding:10px}.game-iframe{height:400px}}.loading-spinner{display:flex;justify-content:center;align-items:center;height:200px}.error-message{color:#ff4d4f;background:#fff2f0;border:1px solid #ffccc7;border-radius:4px;padding:12px;margin:16px 0}.success-message{color:#52c41a;background:#f6ffed;border:1px solid #b7eb8f;border-radius:4px;padding:12px;margin:16px 0}