.chat-window {
    position: relative;
    display: grid;
    grid-template-rows: auto minmax(8.5rem, 1fr) auto auto auto;
    min-height: 30rem;
    height: 100%;
    overflow: hidden;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-card);
    background: var(--color-card);
    box-shadow:
        0 18px 48px rgba(0, 0, 0, 0.32),
        0 0 28px var(--glow-soft);
    scroll-margin-top: calc(var(--header-height) + 0.75rem);
}

.chat-window__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.9rem 1rem 0.85rem 1.05rem;
    border-bottom: 1px solid var(--border-default);
}

.chat-window__brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    min-width: 0;
}

.chat-window__mark {
    width: 2rem;
    height: 2rem;
    flex-shrink: 0;
}

.chat-window__identity {
    display: grid;
    gap: 0.08rem;
}

.chat-window__name {
    color: var(--color-title);
    font-family: var(--font-display);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.chat-window__role {
    color: var(--color-text-muted);
    font-family: var(--font-ui);
    font-size: var(--text-caption);
}

.chat-status {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-text-subtle);
    font-family: var(--font-ui);
    font-size: var(--text-caption);
    white-space: nowrap;
}

.chat-status__dot {
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 999px;
    background: #3ecf8e;
    box-shadow: 0 0 8px rgba(62, 207, 142, 0.55);
}

.chat-status.is-offline .chat-status__dot {
    background: var(--color-text-subtle);
    box-shadow: none;
}

.chat-log {
    display: grid;
    align-content: start;
    gap: 0.85rem;
    overflow: auto;
    padding: 1rem 1.05rem 0.35rem;
}

.chat-turn {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.65rem;
    align-items: start;
}

.chat-avatar {
    width: 1.75rem;
    height: 1.75rem;
    margin-top: 0.15rem;
    border-radius: 0.55rem;
}

.chat-bubble {
    max-width: 100%;
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--border-default);
    border-radius: 0.95rem;
    font-size: 0.9rem;
    line-height: 1.55;
    white-space: pre-wrap;
}

.chat-turn__content {
    display: grid;
    gap: 0.45rem;
    min-width: 0;
}

.chat-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.chat-action {
    min-height: 2.15rem;
    padding: 0.4rem 0.85rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.03);
    color: var(--color-text);
    font-family: var(--font-ui);
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
}

.chat-action:hover,
.chat-action:focus-visible {
    border-color: var(--border-accent);
    background: rgba(255, 87, 34, 0.08);
    color: var(--color-title);
}

.chat-action--primary {
    border-color: var(--color-accent);
    background: var(--color-accent);
    color: #14171c;
}

.chat-action--primary:hover,
.chat-action--primary:focus-visible {
    background: var(--color-accent);
    box-shadow: 0 0 18px var(--glow-medium);
    color: #14171c;
}

.chat-action:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.chat-bubble--user {
    justify-self: end;
    max-width: 92%;
    border-color: var(--border-accent);
    background: rgba(255, 87, 34, 0.08);
    color: var(--color-title);
}

.chat-bubble--system,
.chat-bubble--loading {
    justify-self: stretch;
    border-color: var(--border-accent);
    background: rgba(255, 87, 34, 0.06);
    color: var(--color-text);
    font-size: var(--text-small);
}

.chat-bubble--loading {
    color: var(--color-text-muted);
}

.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding: 0.55rem 1.05rem 0.35rem;
}

.chat-chip {
    min-height: 2rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.03);
    color: var(--color-text);
    font-family: var(--font-ui);
    font-size: 0.72rem;
    font-weight: 500;
    transition:
        border-color var(--transition-fast) var(--ease-mastertech),
        background-color var(--transition-fast) var(--ease-mastertech),
        color var(--transition-fast) var(--ease-mastertech);
}

.chat-chip:hover,
.chat-chip:focus-visible {
    border-color: var(--border-accent);
    background: rgba(255, 87, 34, 0.08);
    color: var(--color-title);
}

.chat-window__composer {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.55rem;
    align-items: end;
    padding: 0.55rem 1.05rem 0.2rem;
}

.chat-window__composer textarea {
    min-height: 3rem;
    max-height: 7.5rem;
    padding: 0.8rem 0.95rem;
    border: 1px solid var(--border-strong);
    border-radius: 0.95rem;
    background: rgba(8, 11, 15, 0.72);
    color: var(--color-text);
    resize: none;
    font-family: var(--font-body);
}

.chat-window__composer textarea:focus-visible {
    border-color: var(--border-accent);
    box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.12);
}

.chat-send {
    width: 3rem;
    min-height: 3rem;
    border: 0;
    border-radius: 0.85rem;
    background: var(--color-accent);
    color: #14171c;
}

.chat-send:hover:not(:disabled) {
    box-shadow: 0 0 18px var(--glow-medium);
}

.chat-send:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.chat-send svg {
    width: 1.05rem;
    height: 1.05rem;
    margin-inline: auto;
}

.chat-note {
    padding: 0.35rem 1.1rem 0.85rem;
    color: var(--color-text-subtle);
    font-size: 0.68rem;
    line-height: 1.45;
}

@media (max-width: 1023px) {
    .hero__title {
        font-size: clamp(2rem, 8.5vw, 2.8rem);
    }

    .chat-window {
        min-height: 26rem;
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    .chat-status__dot {
        box-shadow: none;
    }
}