:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#ececec;background:#212121;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button{cursor:pointer;border:0;border-radius:10px;padding:10px 14px;background:#2f2f2f;color:#fff}button:hover{background:#414141}button:disabled{opacity:.5;cursor:not-allowed}#app{min-height:100vh}.shell{display:grid;grid-template-columns:270px 1fr;min-height:100vh}.sidebar{background:#171717;border-right:1px solid #303030;padding:18px;display:flex;flex-direction:column;gap:14px}.brand{font-size:1.15rem;font-weight:700}.muted{color:#a7b2c1;font-size:.9rem}.conversation-list{overflow:auto;flex:1}.conversation{display:flex;align-items:center;gap:4px;margin:5px 0}.conversation button:first-child{flex:1;text-align:left;background:transparent;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conversation.active button:first-child{background:#303030}.conversation .delete{background:transparent;color:#b6c2d1}.main{display:flex;flex-direction:column;min-width:0}.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 20px;border-bottom:1px solid #303030}.status{display:inline-flex;align-items:center;gap:7px}.dot{width:9px;height:9px;border-radius:50%;background:#798594}.ready .dot{background:#8e8ea0}.busy .dot,.starting .dot{background:#a0a0a0}.messages{flex:1;overflow:auto;max-height:calc(100vh - 177px);padding:24px max(20px,calc((100% - 850px)/2));display:flex;flex-direction:column;gap:16px}.message{white-space:pre-wrap;line-height:1.5;padding:14px 18px;border-radius:15px;max-width:88%;overflow-wrap:anywhere}.user{align-self:flex-end;background:#2f2f2f}.assistant{align-self:flex-start;background:#252525}.composer{display:flex;gap:10px;padding:16px max(20px,calc((100% - 850px)/2));border-top:1px solid #303030}.composer textarea{resize:vertical;min-height:48px;max-height:150px;flex:1;padding:12px;background:#303030;color:white;border:1px solid #41546b;border-radius:10px}.notice{padding:12px 20px;color:#ffd28f;background:#392d20}.auth{max-width:520px;margin:15vh auto;padding:32px;text-align:center}.actions{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.small{font-size:.85rem}.danger{background:#693d49}@media(max-width:700px){.shell{grid-template-columns:1fr}.sidebar{min-height:auto;border-right:0;border-bottom:1px solid #303030}.conversation-list{max-height:120px}.messages{max-height:calc(100vh - 390px);min-height:250px}.topbar{align-items:flex-start;flex-direction:column}}

#gpu-control{display:none!important}#model-select{background:#303030;color:#ececec;border:1px solid #555;border-radius:10px;padding:10px;max-width:170px}.settings-dialog{background:#212121;color:#ececec;border:1px solid #444;border-radius:14px;padding:22px;min-width:min(420px,90vw);box-shadow:0 20px 80px #0009}.settings-dialog::backdrop{background:#0009}.settings-dialog h2{margin:0 0 16px}.settings-dialog .settings-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 0;border-top:1px solid #3b3b3b}.settings-dialog button{background:#303030;color:#ececec;border:1px solid #555;margin:4px}.settings-dialog button:hover{background:#414141}


/* Chat readability: blue user messages, neutral assistant cards, readable Markdown and math. */
.message.user{background:#1f4b8e;color:#f5f8ff;border:1px solid #315e9c}
.message.assistant{background:#262626;color:#e7e7e7;white-space:normal;line-height:1.72}
.message.assistant p{margin:.72em 0}
.message.assistant h1,.message.assistant h2,.message.assistant h3,.message.assistant h4{color:#f1f1f1;line-height:1.3;margin:1.45em 0 .55em}
.message.assistant h1{font-size:1.55rem}.message.assistant h2{font-size:1.35rem}.message.assistant h3{font-size:1.15rem}
.message.assistant ul,.message.assistant ol{padding-left:1.5em;margin:.65em 0}
.message.assistant li{padding:.12em 0}
.message.assistant hr{border:0;border-top:1px solid #4a4a4a;margin:1.4em 0}
.message.assistant blockquote{margin:1em 0;padding:.2em 1em;border-left:3px solid #777;color:#c9c9c9}
.message.assistant table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse;white-space:normal;margin:1em 0}
.message.assistant th,.message.assistant td{border:1px solid #4a4a4a;padding:.55em .7em;text-align:left;vertical-align:top;min-width:110px}
.message.assistant th{background:#333;color:#f2f2f2}
.message.assistant code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#383838;color:#ededed;padding:.12em .35em;border-radius:5px;font-size:.9em}
.message.assistant pre{white-space:pre;overflow-x:auto;background:#1b1b1b;border:1px solid #414141;border-radius:9px;padding:14px;margin:1em 0}
.message.assistant pre code{background:transparent;padding:0}
.message.assistant .katex-display{overflow-x:auto;overflow-y:hidden;padding:.45em 0;margin:1.2em 0;text-align:center}
.message.assistant .katex{font-size:1.04em}
@media(max-width:700px){.message{max-width:96%}.message.assistant{line-height:1.65}}


/* AstraForge sign-in */
.auth{box-sizing:border-box;width:min(460px,calc(100% - 36px));max-width:460px;margin:clamp(56px,15vh,150px) auto 40px;padding:42px 42px 38px;text-align:left;border:1px solid #343843;border-radius:22px;background:radial-gradient(ellipse at 100% 0%,#273653 0%,transparent 48%),linear-gradient(155deg,#22242b 0%,#18191f 100%);box-shadow:0 30px 90px #0008;color:#f3f4f7}
.auth-mark{display:grid;place-items:center;width:58px;height:58px;border:1px solid #8caaff66;border-radius:18px;background:linear-gradient(145deg,#83a7ff,#4778ed);color:#101a32;font-size:1.1rem;font-weight:800;letter-spacing:-.06em;box-shadow:0 10px 28px #4778ed44}
.auth-eyebrow{margin:34px 0 9px;color:#9db8ff;font-size:.72rem;font-weight:700;letter-spacing:.13em}
.auth h1{margin:0 0 12px;color:#f3f4f7;font-size:2.05rem;letter-spacing:-.045em;line-height:1.15}
.auth>p:not(.notice){max-width:34ch;margin:0 0 30px;color:#b4b8c4;font-size:1rem;line-height:1.65}
.auth .notice{margin:0 0 20px;padding:12px 14px;border:1px solid #765052;border-radius:10px;background:#39272b;color:#f1b8b8;text-align:left}
.auth .auth-cta{display:block;width:100%;min-height:50px;border:1px solid #79a0ff;border-radius:12px;background:#5b86ef;color:#fff;font-size:1rem;font-weight:700;box-shadow:0 8px 22px #4778ed33}
.auth .auth-cta:hover{background:#7097f7}
@media(max-width:520px){.auth{margin:10vh auto 28px;padding:32px 26px;border-radius:18px}.auth-eyebrow{margin-top:28px}.auth h1{font-size:1.8rem}}