:root{color-scheme:light;--ink:#15221d;--muted:#6d7973;--paper:#f5f3ec;--panel:#fffdf7;--line:#d9ddd7;--green:#176b4d;--mint:#d9eee4;--orange:#e66e3d}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,sans-serif}button,textarea{font:inherit}button{cursor:pointer}.shell{min-height:100vh;display:grid;grid-template-columns:minmax(280px,37vw) 1fr}.rail{padding:34px clamp(28px,5vw,72px);background:var(--ink);color:#f7f2e8;display:flex;flex-direction:column;border-right:1px solid #36443e}.brand{display:flex;gap:11px;align-items:center;font-weight:700;letter-spacing:-.02em}.brand span{width:31px;height:31px;display:grid;place-items:center;border:1px solid #7ca38f;border-radius:50%;font-family:Georgia,serif;color:#bce0cd}.rail-copy{margin:auto 0;max-width:520px}.eyebrow{margin:0 0 12px;font-size:11px;font-weight:800;letter-spacing:.18em;color:#7b8b84}.rail .eyebrow{color:#8fb7a3}h1{font-family:Georgia,Times New Roman,serif;font-size:clamp(42px,5vw,76px);line-height:.98;font-weight:400;letter-spacing:-.045em;margin:0 0 30px}.rail-copy>p:last-child{color:#adbbb4;line-height:1.7;max-width:45ch}.substrates{display:grid;grid-template-columns:1fr 1fr;gap:0;margin:0;border-top:1px solid #405049}.substrates div{padding:17px 12px 17px 0;border-bottom:1px solid #405049}.substrates dt{color:#83958c;font-size:10px;letter-spacing:.14em;text-transform:uppercase}.substrates dd{margin:5px 0 0;font-size:14px}.disclaimer{color:#788a81;font-size:11px;line-height:1.5;margin:22px 0 0}.chat-panel{min-width:0;height:100vh;display:grid;grid-template-rows:auto 1fr auto;background:var(--panel)}.chat-panel header{padding:28px clamp(24px,5vw,64px);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}h2{margin:0;font-family:Georgia,serif;font-size:29px;font-weight:400}.secondary{border:1px solid var(--line);background:transparent;border-radius:999px;padding:10px 16px;color:var(--ink)}.messages{overflow:auto;padding:44px clamp(24px,7vw,90px)}.welcome{max-width:680px;margin:8vh auto 0;text-align:center}.pulse{width:48px;height:48px;margin:0 auto 25px;border-radius:50%;background:var(--mint);border:13px solid #edf7f1;box-shadow:0 0 0 1px #c7e1d4}.welcome h3{font:400 clamp(28px,4vw,44px)/1.1 Georgia,serif;letter-spacing:-.03em;margin:0 auto 14px;max-width:19ch}.welcome>p{color:var(--muted);line-height:1.65;margin:0 auto 30px;max-width:58ch}.starters{display:grid;grid-template-columns:1fr 1fr;gap:10px;text-align:left}.starters button{border:1px solid var(--line);background:#fff;padding:15px 16px;border-radius:10px;color:#35443d;line-height:1.35}.starters button:hover{border-color:#8ebba5;background:#f6fbf8}.message{max-width:690px;margin:0 auto 26px}.message span{display:block;font-size:10px;font-weight:800;letter-spacing:.14em;color:#829087;margin-bottom:7px}.message p{white-space:pre-wrap;margin:0;line-height:1.65;font-size:16px}.message.user{padding-left:15%}.message.user p{background:#eaf3ee;border:1px solid #d1e2d9;border-radius:14px 14px 3px 14px;padding:14px 17px}.message.assistant{padding-right:10%}.thinking p{color:var(--muted);font-style:italic}.error{color:#a33b2a;background:#fff0eb;border:1px solid #f1c3b4;border-radius:8px;padding:12px;max-width:690px;margin:0 auto}.composer{position:relative;padding:22px clamp(24px,5vw,64px) 30px;border-top:1px solid var(--line);background:rgba(255,253,247,.94);display:grid;grid-template-columns:1fr auto;gap:10px}.composer label{position:absolute;width:1px;height:1px;overflow:hidden}.composer textarea{resize:none;min-height:58px;border:1px solid #cfd6d1;border-radius:12px;padding:15px;outline:none;color:var(--ink);background:#fff}.composer textarea:focus{border-color:#5f9a7e;box-shadow:0 0 0 3px #e2f0e9}.composer>button{border:0;border-radius:12px;padding:0 24px;background:var(--green);color:white;font-weight:700}.composer>button:disabled{opacity:.45;cursor:not-allowed}.composer small{grid-column:1/-1;color:#87928c;font:10px ui-monospace,SFMono-Regular,monospace}@media (max-width:800px){.shell{grid-template-columns:1fr}.rail{display:none}.chat-panel{height:100dvh}.messages{padding:28px 18px}.starters{grid-template-columns:1fr}.chat-panel header,.composer{padding-left:18px;padding-right:18px}.message.user{padding-left:8%}}