.chat-window{border:1px solid var(--zinc-800);background:var(--zinc-950);-ms-overflow-style:none;scrollbar-width:none;border-radius:8px;flex-direction:column;max-width:1000px;height:80vh;margin:10px auto;font-family:sans-serif;display:flex;overflow:hidden}.loader-header{background:var(--zinc-900);border-bottom:1px solid var(--zinc-800);flex-shrink:0;align-items:center;gap:6px;padding:10px 14px;display:flex}.dot{border-radius:50%;width:10px;height:10px}.dot.red{background:#ef4444}.dot.yellow{background:#eab308}.dot.green{background:#22c55e}.chat-header-right{align-items:center;margin-left:auto;display:flex}.config-gear-btn{border:1px solid var(--zinc-700);color:var(--zinc-400);cursor:pointer;background:0 0;border-radius:6px;align-items:center;gap:4px;padding:4px 10px;font-size:.8rem;transition:all .15s;display:flex}.config-gear-btn:hover{background:var(--zinc-800);color:var(--zinc-200);border-color:var(--zinc-600)}.button-container{justify-content:flex-end;margin-top:1rem;padding:10px;display:flex}.messages{flex-direction:column;flex:1;padding:12px;display:flex;overflow-y:auto}.user-who{margin-bottom:2px;font-size:.85rem;font-weight:600}.user-msg .user-who{color:var(--cyan)}.ai-msg .user-who{color:#f97316}.user-msg{background:var(--zinc-800);color:var(--zinc-100);text-align:left;border-radius:12px;align-self:flex-end;max-width:70%;margin:6px 0;padding:10px 14px}.ai-msg{background:var(--zinc-900);color:var(--zinc-200);text-align:left;border-radius:12px;align-self:flex-start;max-width:70%;margin:6px 0;padding:10px 14px}.input-area{border-top:1px solid var(--zinc-800);background:var(--zinc-900);padding:10px;display:flex}.input-area input{background:var(--zinc-800);border:1px solid var(--zinc-700);color:var(--zinc-200);border-radius:6px;flex:1;padding:10px;font-size:16px;transition:border-color .2s,box-shadow .2s}.input-area input:focus{border-color:var(--zinc-500);outline:none;box-shadow:0 0 0 2px #71717a4d}.input-area-btn{color:#fff;border:1px solid var(--zinc-700);background:linear-gradient(135deg, var(--zinc-700), var(--zinc-600));cursor:pointer;white-space:nowrap;border-radius:6px;margin-left:10px;padding:10px 30px;font-size:16px;font-weight:500;transition:all .15s}.input-area-btn:hover{background:linear-gradient(135deg, var(--zinc-600), var(--zinc-500));border-color:var(--zinc-500)}.input-area-btn:active{transform:scale(.97)}.course-chat{max-width:900px;color:var(--zinc-200);margin:0 auto;padding:1rem}.course-description{color:var(--zinc-300);margin-bottom:2rem;font-size:1.1rem}.modules-container{flex-direction:column;gap:0;display:flex}.module-card{border-bottom:1px solid var(--zinc-800);gap:1.5rem;padding:1rem;transition:box-shadow .3s;display:flex}.module-card:hover{box-shadow:0 6px 15px #0000001a}.thumbnail-box{flex:0 0 33%;max-width:33%}.thumbnail-box img{object-fit:cover;border-radius:10px;width:100%;height:auto;transition:transform .3s;display:block;box-shadow:0 2px 6px #00000026}.thumbnail-box a:hover img{transform:scale(1.05)}.info-box{flex-direction:column;flex:1;justify-content:space-between;display:flex}.module-title{color:var(--zinc-100);margin:0 0 .3rem;font-size:1.3rem}.video-duration{color:var(--zinc-400);margin:0 0 1rem;font-size:.9rem}.module-description{color:var(--zinc-300);margin-bottom:1rem;font-size:1rem;line-height:1.4}@media (max-width:768px){.chat-window{margin-left:1px;margin-right:1px}.module-card{flex-direction:column}.thumbnail-box,.info-box{flex:none;max-width:100%}.thumbnail-box{margin-bottom:1rem}.thumbnail-box img{width:100%;height:200px}.ai-msg,.user-msg{max-width:90%}}