:root {
    --chat-nav-radius: 12px;
    --chat-hero-radius: 16px;
    --chat-surface-elev: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.chat-module-nav {
    border: 1px solid rgba(15, 23, 42, 0.06);
    border-radius: var(--chat-nav-radius);
    background: color-mix(in srgb, var(--mud-palette-surface) 92%, transparent);
}

.chat-mod-nav__inner {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
}

.chat-mod-nav__link {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 12px;
    border-radius: 10px;
    color: var(--mud-palette-text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.chat-mod-nav__link:hover {
    background: color-mix(in srgb, var(--mud-palette-primary) 9%, transparent);
    color: var(--mud-palette-primary);
    transform: translateY(-1px);
}

.chat-mod-nav__link--active {
    background: color-mix(in srgb, var(--mud-palette-primary) 14%, var(--mud-palette-surface));
    color: var(--mud-palette-primary);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--mud-palette-primary) 18%, transparent);
}

.chat-header-gradient {
    border-radius: var(--chat-hero-radius);
    background:
        radial-gradient(900px 260px at 12% -10%, rgba(255, 255, 255, 0.24), transparent 60%),
        linear-gradient(135deg, #12355b 0%, #1b5c8f 52%, #3f7fc6 100%);
    color: #fff;
}

.chat-surface-border {
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: var(--chat-surface-elev);
}

.chat-smart-header__avatar,
.chat-smart-header__back {
    color: #fff;
    background: rgba(255, 255, 255, 0.14);
}

.chat-smart-header__kicker {
    color: rgba(255, 255, 255, 0.74);
    font-weight: 700;
    letter-spacing: 0.08em;
}

.chat-smart-header__title {
    color: #fff;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.chat-smart-header__subtitle {
    color: rgba(255, 255, 255, 0.86);
    max-width: 760px;
}

.chat-smart-header__panel {
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.11);
    color: #fff;
    backdrop-filter: blur(10px);
}

.chat-smart-header__chip {
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    color: #fff;
}

.chat-page-shell {
    min-height: calc(100dvh - 96px);
}

.chat-command-grid {
    display: grid;
    grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
    gap: 16px;
    min-height: min(760px, calc(100dvh - 280px));
}

.chat-command-sidebar,
.chat-command-main {
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 18px;
    background: var(--mud-palette-surface);
    box-shadow: 0 8px 28px rgba(15, 23, 42, 0.055);
    overflow: hidden;
}

.chat-command-main {
    min-width: 0;
}

.chat-insight-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.chat-insight-pill {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 10px 12px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
}

.chat-insight-pill__value {
    display: block;
    font-size: 0.95rem;
    font-weight: 750;
    line-height: 1.1;
}

.chat-insight-pill__label {
    display: block;
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.74);
}

.chat-action-card {
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 16px;
    background: var(--mud-palette-surface);
    box-shadow: 0 8px 28px rgba(15, 23, 42, 0.055);
    transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.chat-action-card:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--mud-palette-primary) 30%, transparent);
    background: color-mix(in srgb, var(--mud-palette-primary) 4%, var(--mud-palette-surface));
}

@media (max-width: 960px) {
    .chat-command-grid {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .chat-smart-header__panel {
        margin-top: 8px;
    }

    .chat-insight-strip {
        grid-template-columns: 1fr;
    }
}