.artifact-popup{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.7);display:flex;justify-content:center;align-items:center;z-index:1000}
.artifact-content{background:white;padding:0;border-radius:12px;max-width:90%;max-height:90vh;width:800px;box-shadow:0 5px 30px rgba(0,0,0,0.3);display:flex;flex-direction:column}
.artifact-header{padding:20px;border-bottom:1px solid #e0e0e0;display:flex;justify-content:space-between;align-items:center}
.artifact-header h3{margin:0;color:#764ba2}
.close-artifact{background:none;border:none;font-size:32px;color:#999;cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;line-height:1}
.close-artifact:hover{color:#333}
.artifact-body{padding:20px 20px 20px 30px;overflow-y:auto;flex:1}
.artifact-body h1,.artifact-body h2,.artifact-body h3{margin-top:1.2em;margin-bottom:0.6em}
.artifact-body h1:first-child,.artifact-body h2:first-child,.artifact-body h3:first-child{margin-top:0}
.artifact-body p{margin-bottom:0.8em;line-height:1.6}
.artifact-body ul,.artifact-body ol{margin-left:1.5em;margin-bottom:1em;margin-top:0.5em}
.artifact-body li{margin-bottom:0.4em;line-height:1.5}
.artifact-body ul ul,.artifact-body ol ul,.artifact-body ul ol,.artifact-body ol ol{margin-top:0.3em;margin-bottom:0.3em}
.artifact-footer{padding:15px 20px;border-top:1px solid #e0e0e0;display:flex;gap:10px;justify-content:flex-end}
.artifact-footer button{background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;padding:10px 20px;border-radius:5px;cursor:pointer;transition:all 0.2s}
.artifact-footer button:hover{transform:translateY(-2px);box-shadow:0 3px 10px rgba(0,0,0,0.1)}
.artifact-footer button:active{transform:scale(0.98)}
.topic-popup{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.7);display:flex;justify-content:center;align-items:center;z-index:1000}
.topic-popup-content{background:white;padding:20px;border-radius:10px;max-width:90%;width:500px;box-shadow:0 5px 30px rgba(0,0,0,0.3)}
.topic-popup-content h3{margin-bottom:10px;color:#764ba2}
.topic-popup-content p{margin-bottom:20px;line-height:1.5}
.close-popup{background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;padding:8px 16px;border-radius:5px;cursor:pointer;transition:all 0.2s}
.close-popup:hover{transform:translateY(-2px);box-shadow:0 3px 10px rgba(0,0,0,0.1)}
.welcome-popup{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.7);z-index:1000;display:flex;justify-content:center;align-items:center}
.welcome-content{background:white;padding:25px;border-radius:12px;max-width:90%;width:600px;box-shadow:0 5px 30px rgba(0,0,0,0.3);text-align:center}
.welcome-content h2{margin-bottom:15px;color:#764ba2}
.welcome-content p{margin-bottom:20px;line-height:1.6;color:#333;font-weight:500}
.welcome-content button{background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;padding:10px 20px;border-radius:5px;font-size:16px;cursor:pointer;transition:transform 0.2s}
.welcome-content button:hover{transform:translateY(-2px);box-shadow:0 3px 10px rgba(0,0,0,0.1)}
.welcome-content button:active{transform:scale(0.98)}