:root{--frank-canvas:#fcfbff;--frank-surface:#fff;--frank-soft:#f7f4ff;--frank-lavender:#ede8ff;--frank-purple:#6c5ce7;--frank-purple-deep:#4e3bcb;--frank-purple-light:#8b7cf6;--frank-ink:#17131f;--frank-muted:#6c6675;--frank-border:#e7e1f0;--frank-success:#238a66;--frank-warning:#a96819;--frank-error:#c74646;--frank-info:#4668c9;--frank-user-bubble:#f1edff;--frank-gradient:linear-gradient(135deg, #4e3bcb 0%, #6c5ce7 50%, #a89cff 100%);--font-display:"Manrope", -apple-system, BlinkMacSystemFont, sans-serif;--font-body:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono:"IBM Plex Mono", "SF Mono", Menlo, monospace;--shadow-card:0 10px 30px #28194b12;--shadow-soft:0 4px 16px #28194b0d;--shadow-glow:0 0 0 3px #6c5ce71f;--r-sm:8px;--r-md:12px;--r-lg:16px;--r-xl:20px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%}body{font-family:var(--font-body);background:var(--frank-canvas);color:var(--frank-ink);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:15px;line-height:1.65}a{color:var(--frank-purple);text-decoration:none;transition:color .15s}a:hover{color:var(--frank-purple-deep);text-decoration:underline}button{cursor:pointer;font-family:var(--font-body);border-radius:var(--r-md);background:var(--frank-surface);color:var(--frank-ink);border:none;border:1px solid var(--frank-border);padding:10px 18px;font-size:14px;font-weight:500;transition:all .18s}button:hover:not(:disabled){border-color:var(--frank-purple-light);background:var(--frank-soft)}button:disabled{opacity:.45;cursor:not-allowed}input{font-family:var(--font-body);border:1px solid var(--frank-border);border-radius:var(--r-md);background:var(--frank-surface);color:var(--frank-ink);outline:none;padding:11px 14px;font-size:15px;transition:border-color .18s,box-shadow .18s}input::placeholder{color:var(--frank-muted);opacity:.6}input:focus{border-color:var(--frank-purple);box-shadow:var(--shadow-glow)}.auth-page{background:var(--frank-canvas);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex;position:relative;overflow:hidden}.auth-page:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(circle,#6c5ce714 0%,#ede8ff0a 40%,#0000 70%);width:600px;height:600px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.auth-card{z-index:1;background:var(--frank-surface);border:1px solid var(--frank-border);border-radius:var(--r-lg);width:100%;max-width:400px;box-shadow:var(--shadow-card);padding:40px 36px;position:relative}.auth-title{font-family:var(--font-display);text-align:center;color:var(--frank-ink);letter-spacing:-.5px;margin-bottom:6px;font-size:32px;font-weight:700}.auth-subtitle{text-align:center;color:var(--frank-muted);margin-bottom:28px;font-size:14px}.auth-form{flex-direction:column;gap:14px;display:flex}.auth-input{width:100%}.auth-error{color:var(--frank-error);text-align:center;border-radius:var(--r-sm);background:#c746460f;padding:8px 12px;font-size:13px}.auth-submit{background:var(--frank-purple);color:#fff;border:none;width:100%;margin-top:4px;padding:12px;font-size:15px;font-weight:600}.auth-submit:hover:not(:disabled){background:var(--frank-purple-deep)}.auth-link{text-align:center;color:var(--frank-muted);margin-top:20px;font-size:13px}.auth-link a{font-weight:500}.app-layout{background:var(--frank-canvas);height:100vh;display:flex}.sidebar{background:var(--frank-soft);border-right:1px solid var(--frank-border);flex-direction:column;width:264px;min-width:264px;padding:16px 12px;display:flex}.sidebar-new-btn{background:var(--frank-purple);color:#fff;border-radius:var(--r-md);border:none;justify-content:center;align-items:center;gap:8px;margin-bottom:16px;padding:11px 16px;font-weight:600;transition:background .18s;display:flex}.sidebar-new-btn:hover{background:var(--frank-purple-deep)}.sidebar-list{flex:1;overflow-y:auto}.sidebar-item{border-radius:var(--r-sm);cursor:pointer;border:1px solid #0000;justify-content:space-between;align-items:center;margin-bottom:4px;padding:10px 14px;transition:background .15s;display:flex}.sidebar-item:hover{background:var(--frank-lavender)}.sidebar-item.active{background:var(--frank-lavender);border-color:var(--frank-purple-light)}.sidebar-item-title{text-overflow:ellipsis;white-space:nowrap;color:var(--frank-ink);flex:1;font-size:14px;overflow:hidden}.sidebar-delete-btn{opacity:0;color:var(--frank-muted);background:0 0;border:none;padding:4px;transition:opacity .15s}.sidebar-item:hover .sidebar-delete-btn{opacity:.5}.sidebar-delete-btn:hover{opacity:1;color:var(--frank-error)}.sidebar-empty{color:var(--frank-muted);text-align:center;padding:24px;font-size:13px}.chat-main{background:var(--frank-canvas);flex-direction:column;flex:1;min-width:0;display:flex}.chat-header{border-bottom:1px solid var(--frank-border);background:var(--frank-surface);justify-content:space-between;align-items:center;padding:14px 24px;display:flex}.chat-header-title{font-family:var(--font-display);text-overflow:ellipsis;white-space:nowrap;color:var(--frank-ink);font-size:16px;font-weight:600;overflow:hidden}.chat-header-right{align-items:center;gap:16px;display:flex}.chat-header-user{color:var(--frank-muted);font-size:13px}.logout-btn{color:var(--frank-muted);background:0 0;border:none;padding:6px;transition:color .15s}.logout-btn:hover{color:var(--frank-error);background:0 0;border:none}.usage-indicator{color:var(--frank-muted);flex-direction:column;align-items:flex-end;font-size:12px;line-height:1.4;display:flex}.usage-remaining{color:var(--frank-purple);font-weight:500}.chat-body{flex:1;padding:24px 24px 32px;overflow-y:auto}.chat-empty{text-align:center;flex-direction:column;justify-content:center;align-items:center;height:100%;display:flex;position:relative}.chat-empty:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(circle,#6c5ce70f 0%,#ede8ff08 40%,#0000 70%);width:480px;height:480px;position:absolute;top:40%;left:50%;transform:translate(-50%,-50%)}.chat-empty h2{z-index:1;font-family:var(--font-display);color:var(--frank-ink);letter-spacing:-.8px;margin-bottom:10px;font-size:40px;font-weight:700;position:relative}.chat-empty p{z-index:1;color:var(--frank-muted);font-size:16px;position:relative}.chat-empty-hint{color:var(--frank-purple);margin-top:20px;font-size:14px;font-weight:500}.message-list{max-width:800px;margin:0 auto}.message{margin-bottom:24px}.message-role{color:var(--frank-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px;font-size:12px;font-weight:600}.message-user .message-content{background:var(--frank-user-bubble);color:var(--frank-ink);border-radius:var(--r-md) var(--r-md) var(--r-md) 4px;max-width:85%;padding:12px 16px;line-height:1.6;display:inline-block}.message-assistant .message-content{color:var(--frank-ink);padding:4px 0;line-height:1.7}.message-content{white-space:pre-wrap;word-wrap:break-word}.cursor-blink{color:var(--frank-purple);animation:1s step-end infinite blink}@keyframes blink{50%{opacity:0}}.message-pending{color:var(--frank-muted)}.message-status-tag{border-radius:100px;margin-left:8px;padding:2px 8px;font-size:11px;font-weight:500;display:inline-block}.message-status-tag.cancelled{background:var(--frank-lavender);color:var(--frank-muted)}.message-status-tag.failed{color:var(--frank-error);background:#c7464614}.feedback-buttons{gap:6px;margin-top:8px;display:flex}.feedback-btn{opacity:.35;color:var(--frank-muted);background:0 0;border:1px solid #0000;padding:5px;transition:opacity .15s,color .15s}.feedback-btn:hover{opacity:.7;background:0 0;border-color:#0000}.feedback-btn.active{opacity:1;color:var(--frank-purple)}.warming-up-notice{background:var(--frank-soft);border:1px solid var(--frank-lavender);border-radius:var(--r-md);text-align:center;max-width:800px;color:var(--frank-ink);margin:16px auto;padding:20px}.warming-up-timer{color:var(--frank-muted);margin-top:6px;font-size:13px}.warming-up-retry{background:var(--frank-purple);color:#fff;border:none;align-items:center;gap:6px;margin-top:14px;padding:8px 16px;font-size:13px;font-weight:500;display:inline-flex}.warming-up-retry:hover{background:var(--frank-purple-deep)}.chat-footer{border-top:1px solid var(--frank-border);background:var(--frank-surface);padding:16px 24px 20px}.chat-input-form{align-items:center;gap:10px;max-width:800px;margin:0 auto;display:flex}.chat-input-field{border:1px solid var(--frank-border);border-radius:var(--r-lg);background:var(--frank-surface);box-shadow:var(--shadow-soft);flex:1;padding:13px 16px;font-size:15px;transition:border-color .18s,box-shadow .18s}.chat-input-field:focus{border-color:var(--frank-purple);box-shadow:var(--shadow-soft), var(--shadow-glow)}.chat-input-send{background:var(--frank-purple);color:#fff;border-radius:var(--r-md);border:none;flex-shrink:0;justify-content:center;align-items:center;padding:12px;transition:background .18s;display:flex}.chat-input-send:hover:not(:disabled){background:var(--frank-purple-deep)}.cancel-btn{background:var(--frank-error);color:#fff;border:none;align-items:center;gap:6px;margin:0 auto;padding:10px 20px;font-weight:500;display:flex}.cancel-btn:hover{opacity:.9;background:var(--frank-error)}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--frank-border);border-radius:100px}::-webkit-scrollbar-thumb:hover{background:var(--frank-purple-light)}@media (width<=768px){.sidebar,.chat-header-user{display:none}.auth-card{padding:28px 24px}.chat-empty h2{font-size:32px}}@media (prefers-reduced-motion:reduce){*{transition-duration:.01ms!important;animation-duration:.01ms!important}}