:root{--bg-primary:#212121;--bg-secondary:#2f2f2f;--bg-tertiary:#171717;--bg-hover:#2a2a2a;--bg-input:#2f2f2f;--text-primary:#ececec;--text-secondary:#8e8ea0;--text-muted:#6b6b7b;--accent:#10a37f;--accent-hover:#0d8f6f;--accent-blue:#3b82f6;--accent-purple:#7c3aed;--border:#3f3f3f;--border-light:#2a2a2a;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--shadow:0 4px 24px #0006;--shadow-sm:0 2px 8px #0000004d}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-tertiary);color:var(--text-primary);height:100vh;font-family:Söhne,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif;font-size:15px;line-height:1.6;overflow:hidden}.app-layout{background:var(--bg-tertiary);height:100vh;display:flex;overflow:hidden}.sidebar{background:var(--bg-tertiary);border-right:1px solid var(--border-light);flex-direction:column;flex-shrink:0;width:260px;transition:width .25s,transform .25s;display:flex;overflow:hidden auto}.sidebar.closed{border-right:none;width:0;overflow:hidden}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-track{background:0 0}.sidebar::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.sidebar-header{background:var(--bg-tertiary);z-index:10;border-bottom:1px solid var(--border-light);align-items:center;gap:10px;min-width:260px;padding:14px 16px;display:flex;position:sticky;top:0}.sidebar-header img{border-radius:var(--radius-sm);object-fit:cover;width:32px;height:32px}.sidebar-header h1{background:linear-gradient(135deg,#10a37f,#7c3aed);-webkit-text-fill-color:transparent;letter-spacing:-.01em;-webkit-background-clip:text;font-size:16px;font-weight:600}.sidebar-section{min-width:260px;padding:8px 10px}.sidebar-section h3{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px;padding:0 6px;font-size:11px;font-weight:600}.quick-btn{border-radius:var(--radius-md);cursor:pointer;text-align:left;letter-spacing:-.01em;border:none;align-items:center;gap:8px;width:100%;margin-bottom:4px;padding:9px 12px;font-size:13px;font-weight:500;transition:all .15s;display:flex}.quick-btn:hover{filter:brightness(1.1);transform:translate(2px)}.main-area{background:var(--bg-primary);flex-direction:column;flex:1;height:100dvh;min-height:0;display:flex;overflow:hidden}.chat-messages{flex-direction:column;flex:1;min-height:0;padding:0;display:flex;overflow-y:auto}.chat-messages::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar-track{background:0 0}.chat-messages::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.message{gap:16px;padding:20px 24px;transition:background .15s;display:flex}.message:hover{background:#ffffff05}.message.user{background:0 0;flex-direction:row-reverse}.message.ai{background:0 0}.message-bubble{max-width:720px;font-size:15px;line-height:1.7}.message.user .message-bubble{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);color:var(--text-primary);max-width:70%;padding:12px 18px}.message.ai .message-bubble{color:var(--text-primary);white-space:pre-wrap;padding:4px 0}.chat-input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-xl);color:var(--text-primary);resize:none;outline:none;min-height:52px;max-height:200px;padding:14px 18px;font-family:inherit;font-size:15px;line-height:1.5;transition:border-color .2s,box-shadow .2s}.chat-input:focus{border-color:#10a37f80;box-shadow:0 0 0 3px #10a37f1a}.chat-input::placeholder{color:var(--text-muted)}.send-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:16px;font-weight:600;transition:all .2s;display:flex}.send-btn:hover{background:var(--accent-hover);transform:scale(1.05)}.send-btn:disabled{background:var(--border);cursor:not-allowed;transform:none}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:9999;background:#0009;justify-content:center;align-items:center;width:100%;height:100%;padding:20px;animation:.2s fadeIn;display:flex;position:fixed;top:0;left:0}.modal-box{border-radius:var(--radius-lg);border:1px solid var(--border);width:100%;max-width:800px;max-height:90vh;box-shadow:var(--shadow);background:#1e1e1e;padding:28px;animation:.25s slideUp;overflow-y:auto}.modal-box::-webkit-scrollbar{width:6px}.modal-box::-webkit-scrollbar-track{background:0 0}.modal-box::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.modal-header{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;display:flex}.modal-header h2{color:var(--text-primary);letter-spacing:-.02em;margin:0;font-size:18px;font-weight:600}.modal-close{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);justify-content:center;align-items:center;width:32px;height:32px;font-size:18px;transition:all .15s;display:flex}.modal-close:hover{background:var(--bg-hover);color:var(--text-primary)}.notification{border-radius:var(--radius-md);color:#fff;z-index:99999;box-shadow:var(--shadow);align-items:center;gap:8px;max-width:320px;padding:12px 20px;font-size:14px;font-weight:500;animation:.3s slideIn;display:flex;position:fixed;top:20px;right:20px}.notification.success{background:#10a37f}.notification.error{background:#ef4444}.notification.warning{background:#f59e0b}.topbar{border-bottom:1px solid var(--border-light);background:var(--bg-primary);z-index:100;flex-shrink:0;align-items:center;gap:12px;min-height:50px;padding:10px 16px;display:flex;position:sticky;top:0}.topbar-menu-btn{color:var(--text-secondary);cursor:pointer;border-radius:var(--radius-sm);background:0 0;border:none;align-items:center;padding:6px;font-size:18px;transition:all .15s;display:flex}.topbar-menu-btn:hover{background:var(--bg-secondary);color:var(--text-primary)}.new-chat-btn{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);cursor:pointer;align-items:center;gap:6px;margin-left:auto;padding:7px 14px;font-size:13px;font-weight:500;transition:all .15s;display:flex}.new-chat-btn:hover{background:var(--bg-hover);border-color:var(--accent)}.welcome-screen{flex-direction:column;flex:1;justify-content:center;align-items:center;min-height:0;padding:40px 20px;display:flex;overflow-y:auto}.welcome-title{letter-spacing:-.03em;background:linear-gradient(135deg,#10a37f,#7c3aed);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:8px;font-size:32px;font-weight:700}.welcome-subtitle{color:var(--text-muted);margin-bottom:32px;font-size:15px}.suggestion-chips{flex-wrap:wrap;justify-content:center;gap:8px;max-width:600px;margin-top:16px;display:flex}.suggestion-chip{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-xl);color:var(--text-secondary);cursor:pointer;white-space:nowrap;padding:9px 16px;font-size:13px;transition:all .15s}.suggestion-chip:hover{background:var(--bg-hover);border-color:var(--accent);color:var(--text-primary)}.input-wrapper{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-xl);align-items:flex-end;gap:8px;width:100%;max-width:760px;margin:0 auto;padding:10px 12px;transition:border-color .2s,box-shadow .2s;display:flex}.input-wrapper:focus-within{border-color:#10a37f80;box-shadow:0 0 0 3px #10a37f14}.input-wrapper .chat-input{box-shadow:none;background:0 0;border:none;border-radius:0;flex:1;width:0;min-height:32px;max-height:200px;padding:4px;line-height:1.5;overflow-y:auto}.input-wrapper .chat-input:focus{box-shadow:none;border:none}.history-item{border-radius:var(--radius-md);cursor:pointer;justify-content:space-between;align-items:center;gap:8px;margin-bottom:2px;padding:8px 10px;transition:background .15s;display:flex}.history-item:hover{background:var(--bg-secondary)}.history-item.active{background:#10a37f1a;border:1px solid #10a37f33}.history-item-title{color:var(--text-primary);text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;overflow:hidden}.history-item-date{color:var(--text-muted);font-size:11px}.history-delete-btn{color:var(--text-muted);cursor:pointer;opacity:0;background:0 0;border:none;border-radius:4px;padding:2px 4px;font-size:13px;transition:all .15s}.history-item:hover .history-delete-btn{opacity:1}.history-delete-btn:hover{color:#ef4444;background:#ef44441a}.user-info{border-bottom:1px solid var(--border-light);padding:12px 16px}.user-email{color:var(--text-muted);text-overflow:ellipsis;white-space:nowrap;margin-bottom:8px;font-size:12px;overflow:hidden}.user-plan{color:#10a37f;text-transform:uppercase;letter-spacing:.05em;background:#10a37f26;border-radius:20px;margin-bottom:10px;padding:2px 8px;font-size:11px;font-weight:600;display:inline-block}.action-btns{flex-wrap:wrap;gap:6px;display:flex}.action-btn{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-secondary);cursor:pointer;padding:6px 12px;font-size:12px;font-weight:500;transition:all .15s}.action-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.action-btn.upgrade{color:#fff;background:linear-gradient(135deg,#f59e0b,#d97706);border-color:#0000}.action-btn.upgrade:hover{filter:brightness(1.1)}.action-btn.logout{color:#ef4444;border-color:#ef44444d}.action-btn.logout:hover{background:#ef44441a}.action-btn.admin{color:#fff;background:linear-gradient(135deg,#7c3aed,#6d28d9);border-color:#0000}.input-send-btn{display:none}.input-voice-btn,[data-has-input] .input-send-btn{display:flex}[data-has-input] .input-voice-btn{display:none}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(100px)}to{opacity:1;transform:translate(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.thinking{color:var(--text-muted);animation:1.5s infinite pulse}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#555}@media (width<=768px){.sidebar{z-index:1000;height:100vh;box-shadow:var(--shadow);position:fixed;top:0;left:0;transform:translate(-100%);width:280px!important}.sidebar.open{transform:translate(0)}.sidebar.closed{transform:translate(-100%);width:280px!important}.main-area{flex-direction:column;height:100dvh;display:flex;overflow:hidden}.topbar{z-index:100;background:var(--bg-primary);flex-shrink:0;position:sticky;top:0}.chat-messages{-webkit-overflow-scrolling:touch;flex:1;min-height:0;overflow-y:auto}.welcome-screen{flex:1;min-height:0;overflow-y:auto}.message{padding:12px 16px}.message.user .message-bubble{max-width:90%}.welcome-title{font-size:24px}.input-wrapper{max-width:100%}}