:root{color-scheme:dark;--bg:#212121;--side:#171717;--panel:#2f2f2f;--line:#373737;--text:#ececec;--muted:#a1a1a1;--green:#10a37f}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:14px}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.sidebar{position:fixed;z-index:20;inset:0 auto 0 0;width:260px;background:var(--side);display:flex;flex-direction:column;padding:12px;gap:14px}.side-top{display:flex;align-items:center;justify-content:space-between;padding:4px 3px 8px}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px}.brand-mark{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:#fff;color:#111;font-size:20px}.icon-btn{border:0;background:transparent;color:#ddd;cursor:pointer;width:36px;height:36px;border-radius:9px;font-size:17px}.icon-btn:hover,.new-chat:hover,.history-item:hover{background:#282828}.mobile-toggle{display:none}.new-chat{display:flex;align-items:center;gap:10px;width:100%;padding:12px 13px;border:1px solid #393939;border-radius:10px;background:transparent;color:#eee;text-align:left;cursor:pointer}.new-chat span{font-size:20px}.history-title{padding:13px 8px 0;color:#aaa;font-size:12px;font-weight:600}.history-list{overflow:auto;display:flex;flex-direction:column;gap:3px}.history-empty{color:#777;padding:10px 8px;font-size:12px}.history-item{border:0;background:transparent;color:#ddd;text-align:left;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:10px;border-radius:8px;cursor:pointer}.history-item.active{background:#303030}.sidebar-bottom{margin-top:auto;border-top:1px solid #303030;padding-top:12px;display:flex;align-items:center;gap:8px}.profile-row{display:flex;align-items:center;gap:9px;width:100%;min-width:0}.profile-avatar{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:#565656;font-weight:700}.profile-meta{display:flex;flex-direction:column;min-width:0;flex:1}.profile-meta strong{font-size:13px;overflow:hidden;text-overflow:ellipsis}.profile-meta small{font-size:11px;color:#aaa}.profile-menu{padding:8px;color:#aaa}.login-link,.signup-link{flex:1;text-align:center;border-radius:8px;padding:10px 5px}.login-link{border:1px solid #444}.signup-link{background:#f5f5f5;color:#111;font-weight:650}.app{margin-left:260px;min-height:100vh;display:flex;flex-direction:column;align-items:stretch}.topbar{height:56px;position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:10px;padding:0 22px;background:rgba(33,33,33,.92);backdrop-filter:blur(10px)}.model-name{font-weight:650;font-size:16px;letter-spacing:-.2px}.model-name span:first-child{color:#b7b7b7}.chevron{color:#777;margin-left:5px}.top-actions{margin-left:auto;display:flex;align-items:center;gap:12px}.limit-pill{font-size:11px;color:#bdbdbd;border:1px solid #454545;padding:5px 9px;border-radius:999px}.top-signup{font-size:12px;background:#f4f4f4;color:#171717;padding:7px 11px;border-radius:999px;font-weight:700}.menu-toggle{display:none}.welcome{width:min(100% - 32px,760px);margin:auto auto 12px;padding:32px 0 22px;text-align:center}.welcome[hidden]{display:none}.welcome-mark{font-size:34px;width:64px;height:64px;border:1px solid #454545;border-radius:50%;display:grid;place-items:center;margin:0 auto 25px;background:#282828;color:#f5f5f5}.welcome h1{font-size:clamp(23px,3vw,30px);font-weight:550;letter-spacing:-.7px;margin:0 0 30px}.suggestions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.suggestions button{display:flex;align-items:center;gap:12px;min-height:72px;text-align:left;padding:13px;background:transparent;border:1px solid #454545;border-radius:14px;color:#eee;cursor:pointer}.suggestions button:hover{background:#292929}.suggestion-icon{width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;background:#333;border-radius:10px;font-size:18px}.suggestions button span:last-child{display:flex;flex-direction:column;gap:3px}.suggestions strong{font-size:13px;font-weight:600}.suggestions small{font-size:11px;color:#999}.messages{width:min(100% - 32px,790px);margin:0 auto 24px;flex:0 0 auto}.message{display:flex;gap:17px;padding:21px 0;line-height:1.7}.message+.message{border-top:1px solid rgba(255,255,255,.025)}.message-avatar{width:30px;height:30px;flex:0 0 30px;border-radius:50%;background:#555;display:grid;place-items:center;font-size:12px;font-weight:700;color:white}.message-avatar.ai{background:#10a37f;color:#fff;font-size:17px}.message-content{min-width:0;flex:1}.message-role{font-size:12px;font-weight:700;color:#bbb;margin:0 0 7px}.message-text{white-space:pre-wrap;overflow-wrap:anywhere;font-size:15px}.composer-wrap{position:sticky;bottom:0;margin-top:auto;width:100%;padding:14px 20px 12px;background:linear-gradient(0deg,var(--bg) 78%,rgba(33,33,33,0));z-index:4}.composer{width:min(100%,790px);margin:0 auto;border:1px solid #555;border-radius:26px;background:#2f2f2f;padding:13px 14px 9px;box-shadow:0 8px 28px #0002}.composer:focus-within{border-color:#777}.composer textarea{display:block;width:100%;min-height:31px;max-height:180px;resize:none;outline:0;border:0;background:transparent;color:#eee;padding:4px 3px 10px;font-size:15px;line-height:1.5}.composer textarea::placeholder{color:#aaa}.composer-tools{display:flex;align-items:center;gap:12px}.composer-hint{font-size:10px;color:#888;flex:1}.send-btn{border:0;border-radius:50%;width:34px;height:34px;background:#f3f3f3;color:#171717;font-size:22px;line-height:1;cursor:pointer}.send-btn:disabled{opacity:.45}.composer-note{text-align:center;color:#888;font-size:10px;padding-top:9px}.scrim{display:none}.auth-page{display:grid;place-items:center;padding:20px}.auth-card{width:min(100%,420px);padding:30px;background:#242424;border:1px solid #414141;border-radius:18px}.auth-card h1{font-size:27px;margin:28px 0 5px}.auth-card p{color:#aaa}.auth-card label{display:block;margin:16px 0 6px;color:#ddd;font-size:13px}.auth-card input:not([type=hidden]){width:100%;padding:12px;background:#171717;color:#eee;border:1px solid #454545;border-radius:9px;outline:0}.auth-card input:focus{border-color:#888}.auth-submit{width:100%;margin-top:22px;padding:12px;border:0;border-radius:9px;background:#f5f5f5;color:#111;font-weight:700;cursor:pointer}.auth-bottom{text-align:center;margin-top:18px!important;font-size:13px}.auth-bottom a{color:#fff;text-decoration:underline}.error{padding:10px;background:#4b2525;border-radius:8px;color:#ffdada}@media(max-width:760px){.sidebar{transform:translateX(-100%);transition:transform .2s;width:280px;box-shadow:none}.sidebar.open{transform:translateX(0);box-shadow:12px 0 35px #0007}.mobile-toggle{display:block}.scrim.show{display:block;position:fixed;z-index:19;inset:0;background:#0008}.app{margin-left:0}.menu-toggle{display:block}.topbar{padding:0 12px}.welcome{padding-top:25px}.suggestions{grid-template-columns:1fr}.suggestions button{min-height:62px}.messages{width:calc(100% - 28px)}.composer-wrap{padding:10px 10px 8px}.limit-pill{max-width:125px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.message{gap:11px;padding:16px 0}}