:root { color-scheme: dark; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: #212121; color: #ececec; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
.app-layout { min-height: 100vh; display: flex; }
.sidebar { width: 260px; flex: 0 0 260px; background: #171717; border-right: 1px solid #343434; padding: 20px 16px; display: flex; flex-direction: column; }
.sidebar-brand { display: flex; gap: 9px; align-items: center; font-size: 18px; font-weight: 650; padding: 0 4px 30px; }
.flow-intro h2 { font-size: 14px; margin: 0 0 6px; }.flow-intro p, .flow-note { color: #9b9b9b; font-size: 12px; line-height: 1.45; margin: 0; }
#flow-options { border: 0; padding: 16px 0; margin: 0; display: grid; gap: 4px; }
#flow-options label { display: flex; gap: 10px; align-items: center; padding: 10px 8px; border-radius: 8px; cursor: pointer; font-size: 14px; }#flow-options label:hover { background: #2a2a2a; }
#flow-options input { accent-color: #10a37f; width: 15px; height: 15px; }.flow-note { margin-top: auto; padding: 12px 4px 0; }
.chat-shell { min-height: 100vh; width: 100%; max-width: 920px; margin: auto; padding: 18px 28px 20px; display: flex; flex-direction: column; }
header { display: flex; align-items: center; justify-content: space-between; padding-bottom: 10px; }
.brand { display: flex; align-items: center; gap: 9px; font-size: 18px; font-weight: 650; }
.logo, .welcome-logo { color: #fff; background: #10a37f; border-radius: 50%; display: grid; place-items: center; }
.logo { height: 27px; width: 27px; font-size: 17px; }.welcome-logo { width: 48px; height: 48px; margin: 0 auto 13px; font-size: 25px; }
button { font: inherit; cursor: pointer; border: 0; }.secondary { background: #303030; color: #eee; padding: 9px 12px; border-radius: 9px; font-size: 14px; }.secondary:hover { background: #3b3b3b; }
.messages { flex: 1; width: 100%; display: flex; flex-direction: column; gap: 20px; padding: 42px 0 20px; overflow-y: auto; }
.welcome { margin: auto; text-align: center; transform: translateY(-10%); }.welcome h1 { font-size: clamp(28px, 5vw, 38px); margin: 0 0 10px; letter-spacing: -.8px; }.welcome p { color: #a5a5a5; margin: 0; }
.message { display: flex; gap: 12px; max-width: 780px; line-height: 1.55; white-space: pre-wrap; }.message.user { align-self: flex-end; max-width: 75%; background: #303030; padding: 11px 15px; border-radius: 20px 20px 4px 20px; }.message.assistant { padding: 6px 4px; }.avatar { flex: 0 0 27px; height: 27px; border-radius: 50%; display: grid; place-items: center; background: #10a37f; font-size: 14px; }.error { color: #ffb4ab; }
.composer { display: flex; gap: 10px; align-items: flex-end; padding: 10px 12px 10px 16px; background: #303030; border: 1px solid #4c4c4c; border-radius: 25px; box-shadow: 0 8px 24px #0003; }.composer:focus-within { border-color: #777; }
textarea { resize: none; border: 0; outline: 0; background: transparent; color: #eee; font: inherit; line-height: 1.45; width: 100%; max-height: 180px; padding: 4px 0; }textarea::placeholder { color: #aaa; }
#send { background: #10a37f; color: white; width: 32px; height: 32px; border-radius: 50%; font-size: 22px; line-height: 1; }#send:disabled { background: #5d5d5d; cursor: not-allowed; }.hint { color: #8e8e8e; text-align: center; font-size: 12px; margin: 9px 0 0; }
@media (max-width: 720px) { .app-layout { flex-direction: column; }.sidebar { width: 100%; flex-basis: auto; padding: 12px 14px; border-right: 0; border-bottom: 1px solid #343434; }.sidebar-brand { padding: 0 0 12px; }.flow-intro, .flow-note { display: none; } #flow-options { display: flex; gap: 5px; overflow-x: auto; padding: 0; } #flow-options label { white-space: nowrap; padding: 7px; font-size: 12px; }.chat-shell { min-height: calc(100vh - 126px); padding: 14px 14px 16px; }.messages { padding-top: 28px; }.message.user { max-width: 88%; } .hint { font-size: 11px; } }