:root{color-scheme:light;--sage-field: #d7e2dc;--ink: #1e2a24;--rule: #8fa396;--brass: #c4a35a;--night: #243b33;--paper: #eef3ef;--shadow: rgba(36, 59, 51, .12);--font-display: "Syne", sans-serif;--font-body: "Source Serif 4", Georgia, serif;--font-mono: "IBM Plex Mono", monospace}*,*:before,*:after{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;color:var(--ink);font-family:var(--font-body);background:linear-gradient(90deg,rgba(143,163,150,.14) 1px,transparent 1px),linear-gradient(rgba(143,163,150,.14) 1px,transparent 1px),var(--sage-field);background-size:28px 28px}button,input,a{font:inherit}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(280px,1.1fr) minmax(320px,.9fr);gap:2rem;padding:clamp(1.5rem,4vw,4rem)}.login-aside{align-self:end;max-width:34rem}.login-mark{margin:0 0 .5rem;font-family:var(--font-display);font-size:clamp(3rem,8vw,5rem);line-height:.9;color:var(--night)}.login-aside h1{margin:0 0 1rem;font-family:var(--font-display);font-size:clamp(1.8rem,4vw,2.6rem);font-weight:700;letter-spacing:-.02em}.login-lede{margin:0;max-width:32ch;font-size:1.08rem;line-height:1.55}.login-panel{align-self:center;padding:2rem;background:color-mix(in srgb,var(--paper) 88%,transparent);border:1px solid color-mix(in srgb,var(--rule) 55%,transparent);box-shadow:0 18px 40px var(--shadow)}.login-kicker{margin:0 0 1.25rem;font-family:var(--font-body);font-size:1rem;color:var(--night)}.provider-list{list-style:none;margin:0;padding:0;display:grid;gap:.75rem}.provider-button{width:100%;display:flex;justify-content:space-between;align-items:center;padding:.95rem 1rem;border:1px solid var(--rule);background:var(--paper);color:var(--ink);text-decoration:none;cursor:pointer;transition:transform .12s ease,border-color .12s ease}.provider-button--live:hover,.provider-button--live:focus-visible{transform:translateY(-1px);border-color:var(--night);outline:none}.provider-button--soon{opacity:.45;cursor:not-allowed}.provider-button--soon small{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.02em}.chat-shell{min-height:100vh;display:grid;grid-template-rows:auto 1fr auto;padding:clamp(1rem,3vw,2rem);gap:1rem}.chat-shell--loading{place-items:center}.chat-header{display:flex;justify-content:space-between;align-items:center;gap:1rem}.chat-mark{margin:0;font-family:var(--font-display);font-size:1.4rem;color:var(--night)}.chat-user{margin:.15rem 0 0;font-family:var(--font-mono);font-size:.85rem}.ghost-button{border:1px solid var(--rule);background:transparent;padding:.55rem .9rem;cursor:pointer}.ghost-button:hover,.ghost-button:focus-visible{border-color:var(--night);outline:none}.chat-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(220px,.8fr);gap:1rem;min-height:0}.chat-thread{overflow:auto;padding:1rem;background:color-mix(in srgb,var(--paper) 90%,transparent);border:1px solid color-mix(in srgb,var(--rule) 50%,transparent);display:flex;flex-direction:column;gap:.85rem}.bubble{max-width:46ch;padding:.85rem 1rem;line-height:1.5}.bubble p{margin:0}.bubble--assistant{align-self:flex-start;border-left:3px solid var(--brass);background:#ffffff8c}.bubble--user{align-self:flex-end;background:var(--night);color:var(--paper)}.chat-typing{margin:0;font-family:var(--font-mono);font-size:.82rem;color:var(--night)}.factorial-panel{padding:1rem;border:1px solid color-mix(in srgb,var(--rule) 50%,transparent);background:var(--night);color:var(--paper);display:flex;flex-direction:column;justify-content:flex-end;min-height:220px}.factorial-label{margin:0 0 .5rem;font-family:var(--font-mono);font-size:.75rem;color:var(--brass)}.factorial-digits{margin:0;font-family:var(--font-mono);font-size:clamp(1rem,2.4vw,1.35rem);line-height:1.35;word-break:break-all}.chat-composer{display:grid;grid-template-columns:1fr auto;gap:.75rem}.chat-composer input{padding:.9rem 1rem;border:1px solid var(--rule);background:var(--paper)}.chat-composer input:focus-visible{outline:2px solid var(--brass);outline-offset:1px}.chat-composer button{padding:.9rem 1.2rem;border:1px solid var(--night);background:var(--night);color:var(--paper);cursor:pointer}.chat-composer button:disabled{opacity:.5;cursor:not-allowed}@media(max-width:860px){.login-shell,.chat-layout{grid-template-columns:1fr}.factorial-panel{min-height:140px}}@media(prefers-reduced-motion:reduce){.provider-button{transition:none}}