.app{align-items:center;min-height:calc(100vh - 120px);position:relative;padding-bottom:20px}.app,.chat-container{display:flex;justify-content:center}.chat-container{width:100%;max-width:900px;background:#fff;flex-direction:column;animation:fadeIn .5s ease-in;padding:0 20px 40px}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.messages-container{flex:1 1;overflow-y:auto;padding:40px 30px;display:flex;flex-direction:column;gap:20px}.messages-container::-webkit-scrollbar{width:6px}.messages-container::-webkit-scrollbar-track{background:transparent}.messages-container::-webkit-scrollbar-thumb{background:rgba(102,126,234,.3);border-radius:3px}.messages-container::-webkit-scrollbar-thumb:hover{background:rgba(102,126,234,.5)}.typing-indicator{display:flex;align-items:center;gap:6px;padding:16px 20px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:20px;max-width:-moz-fit-content;max-width:fit-content;margin-left:0;animation:slideIn .3s ease-out}.typing-indicator span{width:8px;height:8px;background:#fff;border-radius:50%;animation:bounce 1.4s ease-in-out infinite}.typing-indicator span:first-child{animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(.6);opacity:.5}40%{transform:scale(1);opacity:1}}@keyframes slideIn{0%{opacity:0;transform:translateX(-20px)}to{opacity:1;transform:translateX(0)}}@media (max-width:768px){.chat-container{padding:0}.messages-container{padding:20px 16px}}.welcome-screen{flex:1 1;display:flex;align-items:center;justify-content:center;padding:40px;animation:fadeInUp .8s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.welcome-content{text-align:center;max-width:600px}.welcome-logo{max-width:350px;width:100%;height:auto;margin-bottom:16px;animation:logoFade .8s ease-out}@keyframes logoFade{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.welcome-subtitle{font-size:18px;color:#000;margin-bottom:8px;line-height:1.5;font-weight:400}.welcome-subtext{font-size:14px;color:#666;font-style:italic;margin-bottom:0;line-height:1.5}@media (max-width:768px){.welcome-screen{padding:20px}.welcome-logo{max-width:250px}.welcome-subtitle{font-size:16px}}.chat-input-container{padding:20px 0;background:#fff;margin-top:-.75rem}.chat-input-form{display:flex;align-items:center;gap:12px;background:#f5f5f7;border-radius:24px;padding:12px 16px;transition:all .3s ease;box-shadow:0 2px 12px rgba(0,0,0,.08);max-width:700px;margin:0 auto}.chat-input-form:focus-within{background:#ebebed;box-shadow:0 4px 16px rgba(0,0,0,.12)}.chat-input{flex:1 1;border:none;background:transparent;outline:none;font-size:15px;font-family:inherit;resize:none;max-height:120px;line-height:1.5;color:#1d1d1f}.chat-input::placeholder{color:#86868b}.send-button{background:linear-gradient(90deg,#e5cf18,#c4a614)!important;border:none;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease;flex-shrink:0;color:#fff}.send-button:hover:not(:disabled){background:linear-gradient(90deg,#e6d78f,#d4b66f);transform:scale(1.05);box-shadow:0 4px 12px hsla(50,69%,80%,.4)}.send-button:active:not(:disabled){transform:scale(.95)}.send-button:disabled{opacity:.4;cursor:not-allowed}.send-button svg{width:20px;height:20px}@media (max-width:768px){.chat-input-container{padding:16px 0}.chat-input-form{padding:10px 14px;margin:0 16px}.chat-input{font-size:16px}.send-button{width:36px;height:36px}}.chat-input-form:focus-within{box-shadow:0 0 0 3px hsla(50,69%,80%,.15),0 2px 12px rgba(0,0,0,.08)}.header-nav{position:fixed;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:center;padding:20px;background:hsla(0,0%,100%,.95);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid #f0f0f0;z-index:100}.header-left{flex:1 1}.header-center{flex:0 0 auto;justify-content:center}.header-center,.logo-link{display:flex;align-items:center}.logo-link{text-decoration:none;transition:opacity .2s ease}.logo-link:hover{opacity:.8}.header-logo{height:18px;width:auto;object-fit:contain}.header-right{flex:1 1;display:flex;justify-content:flex-end;align-items:center;gap:12px}.heart-icon{width:18px;height:18px;object-fit:contain;cursor:pointer;transition:opacity .2s ease}.heart-icon:hover{opacity:.7}.bookmark-icon{width:18px;height:18px;object-fit:contain;cursor:pointer;transition:opacity .2s ease}.bookmark-icon:hover{opacity:.7}.user-menu{position:relative}.user-menu-button{display:flex;align-items:center;gap:8px;padding:8px 16px;background:transparent;border:1px solid #e5e5e7;border-radius:20px;font-size:14px;color:#1d1d1f;cursor:pointer;transition:all .2s ease;font-family:inherit}.user-icon{width:18px;height:18px;object-fit:contain}.user-menu-button:hover{background:#f5f5f7;border-color:#d1d1d6}.menu-arrow{font-size:10px;color:#6e6e73}.user-menu-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:#fff;border:1px solid #e5e5e7;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.1);min-width:200px;overflow:hidden;animation:dropdownFade .2s ease-out}@keyframes dropdownFade{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.menu-item{display:block;width:100%;padding:12px 16px;background:#fff;border:none;text-align:left;font-size:14px;color:#1d1d1f;text-decoration:none;cursor:pointer;transition:background .2s ease;font-family:inherit}.menu-item:hover{background:#f5f5f7}.menu-item-logout{color:#ff3b30;border-top:1px solid #f0f0f0}.menu-item-logout:hover{background:#fff5f5}.signup-button{padding:8px 20px;background:transparent;color:#1d1d1f;border:1px solid #e5e5e7;border-radius:20px;font-size:14px;font-weight:400;cursor:pointer;transition:all .2s ease;font-family:inherit}.signup-button:hover{background:#f5f5f7;border-color:#d1d1d6}@media (max-width:768px){.header-nav{padding:16px}.user-menu-button{font-size:13px;padding:6px 12px}.user-menu-dropdown{min-width:180px}}