.ai-chat-widget {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 1000;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.ai-chat-widget__bubble {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: var(--accent);
    color: var(--bg);
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.ai-chat-widget__bubble:hover {
    filter: brightness(1.08);
}

.ai-chat-widget__panel {
    position: absolute;
    right: 0;
    bottom: 68px;
    width: min(340px, calc(100vw - 40px));
    max-height: min(480px, calc(100vh - 120px));
    flex-direction: column;
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
    overflow: hidden;
}

.ai-chat-widget__panel:not([hidden]) {
    display: flex;
}

.ai-chat-widget__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--fg);
    font-weight: 600;
}

.ai-chat-widget__close {
    background: none;
    border: none;
    color: var(--fg-muted);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 4px;
}

.ai-chat-widget__close:hover {
    color: var(--fg);
}

.ai-chat-widget__messages {
    flex: 1;
    overflow-y: auto;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 160px;
}

.ai-chat-widget__message {
    max-width: 85%;
    padding: 8px 12px;
    border-radius: 12px;
    line-height: 1.4;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-word;
}

.ai-chat-widget__message--user {
    align-self: flex-end;
    background: var(--accent);
    color: var(--bg);
}

.ai-chat-widget__message--assistant {
    align-self: flex-start;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--fg);
}

.ai-chat-widget__message--typing {
    color: var(--fg-muted);
    font-style: italic;
}

.ai-chat-widget__message--error {
    border-color: #c0392b;
    color: #e57373;
}

.ai-chat-widget__form {
    display: flex;
    gap: 8px;
    padding: 12px;
    border-top: 1px solid var(--border);
}

.ai-chat-widget__input {
    flex: 1;
    min-width: 0;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--fg);
    font-size: 0.9rem;
}

.ai-chat-widget__input:focus {
    outline: 1px solid var(--accent);
}

.ai-chat-widget__send {
    padding: 8px 14px;
    border-radius: 8px;
    border: none;
    background: var(--accent);
    color: var(--bg);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

.ai-chat-widget__send:hover {
    filter: brightness(1.08);
}

.ai-chat-widget__send:disabled,
.ai-chat-widget__input:disabled {
    opacity: 0.6;
    cursor: default;
}

@media (max-width: 420px) {
    .ai-chat-widget {
        right: 12px;
        bottom: 12px;
    }

    .ai-chat-widget__panel {
        right: -8px;
    }
}