:root {
    --companion-surface: #1a1d24;
    --companion-surface-soft: #22262f;
    --companion-border: #343a48;
    --companion-text: #e8e4dc;
    --companion-accent: #7189aa;
    --companion-shadow: rgba(0, 0, 0, 0.28);
    --companion-size: 4.75rem;
}

html[data-theme="bright"] {
    --companion-surface: var(--wuxia-paper-raised, #f8f3e7);
    --companion-surface-soft: var(--wuxia-paper-muted, #ded4c1);
    --companion-border: var(--wuxia-hairline, rgba(40, 50, 43, 0.22));
    --companion-text: var(--wuxia-ink, #20251f);
    --companion-accent: var(--wuxia-pine, #31594d);
    --companion-shadow: rgba(57, 48, 36, 0.2);
}

.jianghu-companion {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 40;
    width: var(--companion-size);
    height: var(--companion-size);
    isolation: isolate;
    transition: top 0.2s ease-out, left 0.2s ease-out;
}

.jianghu-companion.is-dragging {
    transition: none;
}

.jianghu-companion-toggle {
    display: grid;
    width: 100%;
    height: 100%;
    overflow: hidden;
    padding: 0;
    border: 1px solid var(--companion-border);
    border-radius: 50%;
    background:
        radial-gradient(circle at 50% 38%, var(--companion-surface-soft), var(--companion-surface) 72%);
    box-shadow: 0 8px 24px var(--companion-shadow);
    color: var(--companion-text);
    cursor: grab;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    place-items: end center;
}

.jianghu-companion-toggle:hover {
    border-color: var(--companion-accent);
    box-shadow: 0 10px 28px var(--companion-shadow);
}

.jianghu-companion-toggle:focus-visible {
    outline: 2px solid var(--companion-accent);
    outline-offset: 3px;
}

.jianghu-companion.is-dragging .jianghu-companion-toggle {
    cursor: grabbing;
}

.jianghu-companion-avatar {
    display: block;
    width: 108%;
    max-width: none;
    height: 108%;
    pointer-events: none;
    object-fit: contain;
    object-position: center bottom;
    transform: translateY(2%);
}

.jianghu-companion-message {
    position: absolute;
    top: 50%;
    width: max-content;
    max-width: min(16rem, calc(100vw - var(--companion-size) - 2rem));
    padding: 0.72rem 0.88rem;
    border: 1px solid var(--companion-border);
    border-radius: 8px;
    background: var(--companion-surface);
    box-shadow: 0 8px 24px var(--companion-shadow);
    color: var(--companion-text);
    font: 600 0.82rem/1.55 "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
    pointer-events: none;
}

.jianghu-companion-message[hidden] {
    display: none;
}

.jianghu-companion-message::after {
    content: "";
    position: absolute;
    top: var(--companion-arrow-y, 50%);
    width: 0.62rem;
    height: 0.62rem;
    border: solid var(--companion-border);
    background: var(--companion-surface);
}

.jianghu-companion.is-right .jianghu-companion-message {
    right: calc(100% + 0.72rem);
}

.jianghu-companion.is-right .jianghu-companion-message::after {
    right: -0.36rem;
    border-width: 1px 1px 0 0;
    transform: translateY(-50%) rotate(45deg);
}

.jianghu-companion.is-left .jianghu-companion-message {
    left: calc(100% + 0.72rem);
}

.jianghu-companion.is-left .jianghu-companion-message::after {
    left: -0.36rem;
    border-width: 0 0 1px 1px;
    transform: translateY(-50%) rotate(45deg);
}

.jianghu-companion.is-speaking .jianghu-companion-message {
    animation: jianghu-companion-message-in 0.18s ease-out;
}

.jianghu-companion.is-speaking .jianghu-companion-avatar {
    animation: jianghu-companion-greeting 0.42s ease-in-out 2;
    transform-origin: center bottom;
}

@keyframes jianghu-companion-message-in {
    from { opacity: 0; transform: translateX(0.25rem); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes jianghu-companion-greeting {
    0%, 100% { transform: translateY(2%) rotate(0); }
    50% { transform: translateY(2%) rotate(-2deg); }
}

@media (max-width: 460px) {
    :root { --companion-size: 4rem; }
    .jianghu-companion-message {
        max-width: calc(100vw - var(--companion-size) - 1.5rem);
        padding: 0.65rem 0.75rem;
        font-size: 0.78rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .jianghu-companion,
    .jianghu-companion-toggle {
        transition: none;
    }
    .jianghu-companion.is-speaking .jianghu-companion-message,
    .jianghu-companion.is-speaking .jianghu-companion-avatar {
        animation: none;
    }
}