:root{--bg: #111;--surface: #222222;--surface-2: #2c2c2c;--surface-3: #363636;--border: #5a5a5a;--border-strong: #737373;--fg: #e0e0e0;--fg-muted: #888888;--fg-dim: #6b6b6b;--accent: #7ddcff;--accent-bright: #b9efff;--accent-dim: rgba(125, 220, 255, .14);--coral: #e85454;--font: "Helvetica Neue", Helvetica, Arial, sans-serif}*{box-sizing:border-box;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:var(--font);height:100vh;height:100dvh;overflow:hidden;font-size:16px;letter-spacing:-.01em}.app{position:relative;width:100%;height:100dvh;display:flex;flex-direction:column}header{width:100%;padding:16px 24px;border-bottom:1px solid var(--border);background:var(--bg)}.header-inner{width:100%;max-width:800px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.header-actions{display:flex;align-items:center;gap:8px}.model-selector{position:relative}.model-btn{display:flex;align-items:center;gap:10px;max-width:220px;padding:8px 12px;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--fg);font-family:inherit;font-size:14px;font-weight:500;cursor:pointer;transition:all .18s;letter-spacing:-.01em}.model-btn:hover{border-color:var(--border-strong);background:var(--surface-2)}.model-btn span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.model-btn .chevron{flex:0 0 auto;width:14px;height:14px;color:var(--fg-muted);transition:transform .2s}.model-btn[aria-expanded=true] .chevron{transform:rotate(180deg)}.model-dropdown{position:absolute;top:calc(100% + 8px);right:0;width:280px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:4px;box-shadow:0 24px 60px #00000073;opacity:0;transform:translateY(-8px) scale(.97);pointer-events:none;transition:all .18s cubic-bezier(.4,0,.2,1);z-index:100;display:flex;flex-direction:column;gap:2px}.model-dropdown.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}.model-dropdown-header{display:grid;grid-template-columns:minmax(0,1fr) 56px 20px;gap:4px;padding:6px 12px 4px;color:var(--fg-dim);font-size:10px;font-weight:600;letter-spacing:.06em;line-height:1.2;text-transform:uppercase}.model-dropdown-header span:last-child{text-align:center}.model-option{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 56px 20px;align-items:center;gap:4px;padding:8px 12px;border-radius:8px;cursor:pointer;transition:background .15s}.model-option:hover{background:var(--surface-2)}.model-option.active{background:var(--accent-dim)}.model-info{min-width:0}.model-name{font-size:14px;font-weight:500;color:var(--fg)}.model-check{justify-self:center;width:16px;height:16px;color:var(--accent);opacity:0;transition:opacity .15s}.model-option.active .model-check{opacity:1}.model-country{display:flex;align-items:center;justify-content:center}.country-flag{display:block;flex:0 0 auto;width:24px;height:16px}.icon-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--surface);border:1px solid var(--border);border-radius:10px;color:var(--fg-muted);cursor:pointer;transition:all .18s}.icon-btn:hover{color:var(--fg);border-color:var(--border-strong);background:var(--surface-2)}.chat-container{flex:1;width:100%;overflow-y:auto;scrollbar-gutter:stable;padding:24px 24px 16px;-webkit-overflow-scrolling:touch}.chat-container::-webkit-scrollbar{width:8px}.chat-container::-webkit-scrollbar-track{background:transparent}.chat-container::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.chat-container::-webkit-scrollbar-thumb:hover{background:var(--border-strong)}.empty-state{position:relative;max-width:600px;margin:0 auto;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:20px}.messages{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:16px}.message{animation:slideIn .35s cubic-bezier(.2,.8,.2,1);width:100%}.is-hidden{display:none!important}@keyframes slideIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message-role{font-size:12px;color:var(--fg-dim);margin-bottom:4px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;word-break:break-all}.message-text{font-size:16px;line-height:1.65;color:var(--fg);word-wrap:break-word;overflow-wrap:break-word}.input-area{width:100%;padding:16px 24px 20px;background:var(--bg);border-top:1px solid var(--border)}.input-inner{max-width:800px;margin:0 auto}.input-wrapper{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:8px;position:relative}.input-row{display:flex;align-items:center;gap:6px}textarea{flex:1;display:block;align-self:center;min-height:44px;max-height:200px;background:none;border:none;outline:none;color:var(--fg);font-family:inherit;font-size:16px;line-height:24px;padding:10px 12px;resize:none;letter-spacing:-.01em}textarea::placeholder{color:var(--fg-dim)}.input-actions{align-self:flex-end;display:flex;align-items:center;gap:2px;padding:4px}.send-btn{width:40px;height:40px;background:var(--accent);color:var(--bg);border:none;border-radius:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .18s}.send-btn:hover:not(:disabled){background:var(--accent-bright);transform:scale(1.06)}.send-btn:active:not(:disabled){transform:scale(.96)}.send-btn:disabled{background:var(--surface-3);color:var(--fg-dim);cursor:not-allowed}.send-btn.stop{background:var(--surface-3);color:var(--fg)}.send-btn.stop:hover{background:var(--border-strong)}.input-footer{display:block;text-align:center;margin-top:10px;font-size:11px;color:var(--fg-dim);line-height:1.4}.input-footer a{color:var(--fg-muted);text-decoration:underline;transition:color .18s}.input-footer a:hover{color:var(--fg)}@media(max-width:640px){header{padding:12px 16px}.chat-container{padding:16px 16px 12px}.input-area{padding:12px 16px 16px}.icon-btn{width:40px;height:40px}.model-btn{max-width:none;padding:10px 12px}.model-dropdown{width:min(280px,calc(100vw - 32px))}}