.nas-chat-launch, .nas-chat {
    --chat-bg: var(--color-bg, #09111d);
    --chat-surface: var(--color-surface, #0d1728);
    --chat-raised: var(--color-surface-alt, #132035);
    --chat-text: var(--color-text, #eef4ff);
    --chat-muted: var(--color-text-muted, #a7b5ce);
    --chat-line: var(--color-line, #556173);
    --chat-accent: var(--color-accent, #23c4ff);
    --chat-focus: var(--color-focus, #23c4ff);
    color: var(--chat-text);
    background: var(--chat-surface);
    border: 1px solid var(--chat-line);
    font: inherit;
}
.nas-chat-launch {
    position: fixed;
    right: 24px;
    bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    z-index: 39;
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    padding: 0;
    border-color: var(--chat-focus);
    border-radius: 50%;
}
.nas-chat-launch .icon { display: block; width: 20px; height: 20px; }
.nas-chat-launch:hover { color: var(--chat-accent); border-color: var(--chat-accent); }
.scroll-top-fab { bottom: calc(84px + env(safe-area-inset-bottom, 0px)); }
body:has([data-nav].is-open) .nas-chat-launch, body:has([data-cookie-banner].is-visible) .nas-chat-launch { visibility: hidden; }

.nas-chat {
    position: fixed;
    inset: auto 24px calc(24px + env(safe-area-inset-bottom, 0px)) auto;
    width: min(26rem, calc(100% - 48px));
    height: min(38rem, calc(100dvh - 48px - env(safe-area-inset-bottom, 0px)));
    max-width: none;
    max-height: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border-radius: 1.15rem;
    box-shadow: 0 20px 65px rgb(0 0 0 / .25);
}
.nas-chat[open] { display: grid; grid-template-rows: auto minmax(0, 1fr) auto; }
.nas-chat::backdrop { background: rgb(6 11 18 / .38); }
.nas-chat :is(button, textarea, a, .nas-chat-thread):focus-visible, .nas-chat-launch:focus-visible {
    outline: 2px solid var(--chat-focus);
    outline-offset: 2px;
}

.nas-chat-head {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .75rem 1rem;
    border-bottom: 1px solid var(--chat-line);
}
.nas-chat-avatar {
    display: grid;
    flex: 0 0 auto;
    place-items: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    color: var(--chat-accent);
    background: var(--chat-raised);
}
.nas-chat-heading { flex: 1; }
.nas-chat-heading h2 { margin: 0; font-size: 1rem; line-height: 1.25; }
.nas-chat-heading h2:focus { outline: none; }
.nas-chat-heading p { margin: .15rem 0 0; color: var(--chat-muted); font-size: .8rem; }
.nas-chat-close, .nas-chat-form button {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    border-radius: 50%;
}
.nas-chat-close { color: var(--chat-muted); background: transparent; }
.nas-chat-close:hover { color: var(--chat-text); background: var(--chat-raised); }
.nas-chat .nas-chat-close:focus-visible { outline: 1px solid var(--chat-muted); }

.nas-chat-thread {
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 1rem;
    background: var(--chat-bg);
}
.nas-chat-thread:focus-visible { outline-offset: -3px; }
.nas-chat-log { display: grid; gap: .75rem; }
.nas-chat-log:not(:empty) { margin-top: 1rem; }
.nas-chat-turn {
    width: fit-content;
    max-width: 94%;
    padding: .65rem .85rem;
    border: 1px solid var(--chat-line);
    border-radius: .9rem .9rem .9rem .25rem;
    background: var(--chat-raised);
    font-size: .875rem;
    line-height: 1.5;
    overflow-wrap: anywhere;
}
.nas-chat-turn--user {
    justify-self: end;
    max-width: 85%;
    border-radius: .9rem .9rem .25rem .9rem;
    background: color-mix(in srgb, var(--chat-accent) 15%, var(--chat-raised));
}
.nas-chat-turn strong { display: block; margin-bottom: .2rem; font-size: .72rem; color: var(--chat-muted); }
.nas-chat-turn p { margin: 0; white-space: pre-wrap; }
.nas-chat-loading { display: flex; align-items: center; min-height: 1.4rem; color: var(--chat-accent); }
.nas-chat-loading::after {
    content: '';
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--chat-line);
    border-top-color: currentColor;
    border-radius: 50%;
}
@media (prefers-reduced-motion: no-preference) {
    .nas-chat-loading::after { animation: nas-chat-spin .75s linear infinite; }
}
@keyframes nas-chat-spin { to { transform: rotate(1turn); } }
.nas-chat-turn ul {
    display: grid;
    gap: .35rem;
    margin: .55rem 0 0;
    padding: .55rem 0 0;
    border-top: 1px solid var(--chat-line);
    list-style: none;
    font-size: .8rem;
}
.nas-chat a, .nas-chat-reset { color: var(--chat-text); text-decoration: underline; text-underline-offset: .16em; }
.nas-chat a:hover, .nas-chat-reset:hover { color: var(--chat-accent); }
.nas-chat-reset { padding: 0; border: 0; background: transparent; font: inherit; }
.nas-chat-suggestions { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .7rem; }
.nas-chat-suggestions button {
    min-height: 36px;
    padding: .3rem .65rem;
    border: 1px solid var(--chat-line);
    border-radius: 999px;
    color: var(--chat-text);
    background: var(--chat-surface);
    font-size: .77rem;
}
.nas-chat-suggestions button:hover { color: var(--chat-accent); border-color: var(--chat-accent); }

.nas-chat-compose { padding: .65rem 1rem .75rem; border-top: 1px solid var(--chat-line); }
.nas-chat-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: .55rem; }
.nas-chat-form textarea {
    width: 100%;
    min-height: 44px;
    max-height: 7rem;
    padding: .65rem .8rem;
    resize: none;
    field-sizing: content;
    border: 1px solid var(--chat-line);
    border-radius: .75rem;
    color: var(--chat-text);
    background: var(--chat-bg);
    font-size: 1rem;
    line-height: 1.35;
}
.nas-chat-form textarea::placeholder { color: var(--chat-muted); }
.nas-chat-form button { background: var(--color-toggle-bg, #eef4ff); color: var(--color-toggle-icon, #09111d); }
.nas-chat-form button:hover { background: var(--chat-accent); color: var(--chat-bg); }
.nas-chat-form button:disabled { opacity: .6; cursor: wait; }
.nas-chat-status, #nas-chat-notice { color: var(--chat-muted); font-size: .75rem; line-height: 1.4; }
.nas-chat-status { margin: 0 0 .4rem; }
.nas-chat-status:empty { display: none; }
#nas-chat-notice { margin: .45rem 0 .2rem; }
#nas-chat-notice :is(a, button) { margin-inline-end: .55rem; }

@media (max-width: 560px) {
    .nas-chat {
        inset: auto 0 var(--chat-keyboard-offset, 0px);
        width: 100%;
        height: min(38rem, calc(var(--chat-viewport-height, 100dvh) - env(safe-area-inset-top, 0px) - .5rem));
    }
    .nas-chat-compose { padding-bottom: calc(.75rem + env(safe-area-inset-bottom, 0px)); }
}