/* ---- 悬浮按钮 FAB ---- */
.chat-fab {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 62px;
    height: 62px;
    border-radius: 50%;
    border: none;
    cursor: grab;
    z-index: 9999;
    background: linear-gradient(135deg, #FDC2CC 0%, #ffb3c1 50%, #ff8fa3 100%);
    box-shadow: 0 8px 28px rgba(253, 146, 168, 0.55), 0 2px 8px rgba(0,0,0,0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.3s ease;
    overflow: hidden;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

.chat-fab:active {
    cursor: grabbing;
}

.chat-fab:hover {
    box-shadow: 0 14px 36px rgba(253, 146, 168, 0.65), 0 4px 12px rgba(0,0,0,0.15);
}

.chat-fab--open {
    transform: scale(0.92) rotate(10deg);
}

.chat-fab-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.chat-fab-icon {
    font-size: 1.6rem;
    position: relative;
    z-index: 1;
}

/* FAB canvas（拼豆风格，不强制 pixelated） */
#chatFabCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
}

/* AI 消息头像 canvas */
.chat-msg canvas {
    flex-shrink: 0;
}

/* 头部头像 canvas */
.chat-header-avatar canvas {
    border-radius: 50%;
}

/* ---- 聊天窗口 ---- */
.chat-window {
    position: fixed;
    /* 默认位置由 JS 动态设置，CSS 这里只做 fallback */
    bottom: 108px;
    right: 32px;
    width: 360px;
    height: 520px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow:
        0 24px 60px rgba(253, 146, 168, 0.25),
        0 8px 24px rgba(0,0,0,0.12),
        inset 0 1px 0 rgba(255,255,255,0.9);
    border: 1px solid rgba(255, 183, 197, 0.4);
    display: flex;
    flex-direction: column;
    z-index: 9998;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.35s cubic-bezier(.34,1.4,.64,1);
    transform-origin: bottom right;
}

.chat-window--open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

/* ---- 头部 ---- */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    background: linear-gradient(135deg, #FDC2CC 0%, #ffb3c1 60%, #ff8fa3 100%);
    border-radius: 24px 24px 0 0;
    flex-shrink: 0;
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-header-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid rgba(255,255,255,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.3);
    flex-shrink: 0;
}

.chat-header-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-header-avatar-fallback {
    font-size: 1.2rem;
}

.chat-header-info {
    display: flex;
    flex-direction: column;
}

.chat-header-name {
    color: white;
    font-weight: 700;
    font-size: 0.95rem;
    text-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.chat-header-status {
    color: rgba(255,255,255,0.85);
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #4ade80;
    display: inline-block;
    box-shadow: 0 0 6px rgba(74, 222, 128, 0.8);
    animation: pulse-green 2s infinite;
}

.status-dot.thinking {
    background: #fbbf24;
    box-shadow: 0 0 6px rgba(251, 191, 36, 0.8);
    animation: pulse-yellow 1s infinite;
}

@keyframes pulse-green {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes pulse-yellow {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

.chat-header-actions {
    display: flex;
    gap: 4px;
}

.chat-action-btn {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.2);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    transition: background 0.2s;
}

.chat-action-btn:hover {
    background: rgba(255,255,255,0.35);
}

/* ---- 消息区域 ---- */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(253, 194, 204, 0.5);
    border-radius: 10px;
}

/* ---- 消息行 ---- */
.chat-msg {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    animation: msg-in 0.3s cubic-bezier(.34,1.2,.64,1) forwards;
}

@keyframes msg-in {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.user-msg { flex-direction: row-reverse; }

/* ---- 头像 ---- */
.msg-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.ai-avatar {
    background: linear-gradient(135deg, #FDC2CC, #ffb3c1);
    border: 2px solid rgba(253, 183, 197, 0.5);
}

.user-avatar {
    background: linear-gradient(135deg, #FDC2CC, #ff8fa3);
    border: 2px solid rgba(255, 143, 163, 0.5);
    color: white;
}

.msg-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-fallback { font-size: 1rem; }

/* ---- 气泡 ---- */
.msg-bubble {
    max-width: 72%;
    border-radius: 18px;
    padding: 10px 14px;
    position: relative;
    word-break: break-word;
    line-height: 1.55;
}

.msg-bubble p {
    margin: 0;
    font-size: 0.88rem;
    color: #333;
}

.msg-time {
    display: block;
    font-size: 0.68rem;
    margin-top: 4px;
    opacity: 0.55;
    text-align: right;
}

.ai-bubble {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(253, 194, 204, 0.5);
    box-shadow: 0 2px 10px rgba(253, 146, 168, 0.1);
    border-bottom-left-radius: 6px;
}

.user-bubble {
    background: linear-gradient(135deg, #FDC2CC 0%, #ffb3c1 100%);
    border-bottom-right-radius: 6px;
    box-shadow: 0 2px 12px rgba(253, 146, 168, 0.3);
}

.user-bubble p { color: white; }
.user-bubble .msg-time { color: rgba(255,255,255,0.7); }

/* ---- 思考中动画 ---- */
.thinking-bubble { padding: 12px 16px; }

.thinking-dots {
    display: flex;
    align-items: center;
    gap: 5px;
    height: 18px;
}

.thinking-dots span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FDC2CC, #ff8fa3);
    animation: dot-bounce 1.2s infinite ease-in-out;
}

.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dot-bounce {
    0%, 80%, 100% { transform: translateY(0); opacity: 0.5; }
    40% { transform: translateY(-7px); opacity: 1; }
}

/* ---- 输入区域 ---- */
.chat-input-area {
    padding: 10px 12px 14px;
    border-top: 1px solid rgba(253, 194, 204, 0.3);
    background: rgba(255, 245, 247, 0.8);
    flex-shrink: 0;
    border-radius: 0 0 24px 24px;
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: rgba(255,255,255,0.9);
    border: 1.5px solid rgba(253, 194, 204, 0.5);
    border-radius: 18px;
    padding: 6px 6px 6px 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-input-wrapper:focus-within {
    border-color: #FDC2CC;
    box-shadow: 0 0 0 3px rgba(253, 194, 204, 0.2);
}

.chat-input {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    color: #333;
    outline: none;
    min-height: 24px;
    max-height: 120px;
    overflow-y: auto;
}

.chat-input::placeholder { color: #bbb; }

.chat-send-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #FDC2CC, #ff8fa3);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 3px 10px rgba(253, 146, 168, 0.4);
}

.chat-send-btn:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: 0 5px 16px rgba(253, 146, 168, 0.55);
}

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

/* ---- 遮罩（移动端）---- */
.chat-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.15);
    z-index: 9997;
}

.chat-overlay--show { display: block; }

/* ---- 响应式 ---- */
@media (max-width: 480px) {
    .chat-window {
        left: 16px !important;      /* 左右对称的边距 */
        right: 16px !important;     
        bottom: 50% !important;      /* 垂直居中 */
        top: auto !important;
        transform: translateY(50%) !important;  /* 配合 bottom:50% 实现居中 */
        width: auto !important;
        height: 70vh !important;
        border-radius: 24px !important;  /* 所有角都是24px圆角 */
        max-width: calc(100% - 32px);
        margin: 0 auto;
    }
    
    /* 当窗口打开时，确保 transform 不被覆盖 */
    .chat-window--open {
        transform: translateY(50%) !important;
    }

    .chat-fab {
        bottom: 20px;
        right: 20px;
    }
}

.chat-fab.chat-fab--hidden {
    opacity: 0 !important;
    pointer-events: none !important;
    visibility: hidden !important;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}