/* 群组聊天样式 */

/* 聊天面板容器 */
.group-chat {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 400px;
    max-width: calc(100vw - 40px);
    height: 600px;
    max-height: calc(100vh - 40px);
    background-color: var(--color-bg-surface);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--color-border);
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    visibility: hidden;
    transition: all var(--transition-normal);
}

.group-chat--visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    visibility: visible;
}

/* 头部 */
.group-chat__header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: var(--color-bg-surface-alt);
    flex-shrink: 0;
}

.group-chat__title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-main);
    margin: 0;
}

.group-chat__close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 1.25rem;
    line-height: 1;
    padding: 0;
}

.group-chat__close:hover {
    color: var(--color-text-main);
    background-color: var(--color-bg-body);
}

/* 消息列表容器 */
.group-chat__messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    min-height: 0;
}

.group-chat__messages::-webkit-scrollbar {
    width: 6px;
}

.group-chat__messages::-webkit-scrollbar-track {
    background: transparent;
}

.group-chat__messages::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
}

.group-chat__messages::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* 加载更多提示 */
.group-chat__load-more {
    text-align: center;
    padding: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.group-chat__load-more:hover {
    color: var(--color-text-secondary);
}

.group-chat__load-more--loading {
    cursor: default;
    opacity: 0.6;
}

/* 消息项 */
.group-chat__message {
    display: flex;
    gap: var(--spacing-sm);
    animation: message-slide-in var(--transition-fast) ease-out;
}

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

.group-chat__message--own {
    flex-direction: row-reverse;
}

/* 头像 */
.group-chat__avatar {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    background-color: var(--color-bg-surface-alt);
}

/* 消息内容区域 */
.group-chat__message-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
}

.group-chat__message--own .group-chat__message-content {
    align-items: flex-end;
}

/* 消息气泡 */
.group-chat__bubble {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    word-wrap: break-word;
    word-break: break-word;
    max-width: 80%;
    line-height: 1.5;
    white-space: pre-wrap;
}

.group-chat__message--own .group-chat__bubble {
    background-color: var(--color-primary);
    color: #ffffff;
    border-bottom-right-radius: var(--radius-sm);
}

.group-chat__message:not(.group-chat__message--own) .group-chat__bubble {
    background-color: var(--color-bg-surface-alt);
    color: var(--color-text-main);
    border-bottom-left-radius: var(--radius-sm);
}

/* 用户名 */
.group-chat__username {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.group-chat__message--own .group-chat__username {
    text-align: right;
}

/* 时间戳 */
.group-chat__timestamp {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.group-chat__message--own .group-chat__timestamp {
    text-align: right;
}

/* 系统消息 */
.group-chat__system-message {
    text-align: center;
    padding: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-style: italic;
}

/* 输入区域 */
.group-chat__input-area {
    position: relative;
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--spacing-sm);
    background-color: var(--color-bg-surface-alt);
    flex-shrink: 0;
}

.group-chat__input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-surface);
    color: var(--color-text-main);
    font-size: 0.875rem;
    font-family: inherit;
    resize: none;
    min-height: 40px;
    max-height: 120px;
    transition: border-color var(--transition-fast);
}

.group-chat__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

.group-chat__send-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
}

.group-chat__send-btn:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
}

.group-chat__send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 触发按钮（控制台开启） */
.group-chat__trigger {
    position: fixed;
    bottom: calc(var(--spacing-xl) + 48px + var(--spacing-md));
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
    z-index: 999;
}

.group-chat__trigger:hover {
    background-color: var(--color-primary-hover);
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

.group-chat--visible ~ .group-chat__trigger,
.group-chat--visible + .group-chat__trigger {
    display: none;
}

/* 深色模式适配 */
@media (prefers-color-scheme: dark) {
    .group-chat {
        box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
    }

    .group-chat__trigger {
        box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    }

    .group-chat__trigger:hover {
        box-shadow: 0 6px 16px rgba(59, 130, 246, 0.5);
    }
}

/* 移动端适配 */
@media (max-width: 640px) {
    .group-chat {
        bottom: 0;
        right: 0;
        left: 0;
        top: 0;
        width: 100%;
        max-width: 100%;
        /* 使用动态视口高度，适配移动端地址栏 */
        height: 100vh;
        height: 100dvh;
        height: calc(var(--vh, 1vh) * 100);
        min-height: -webkit-fill-available;
        max-height: 100vh;
        max-height: 100dvh;
        max-height: calc(var(--vh, 1vh) * 100);
        border-radius: 0;
        border-left: none;
        border-right: none;
        border-bottom: none;
        border-top: none;
        /* 支持安全区域（刘海屏等） */
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }

    .group-chat__header {
        /* 确保头部不被安全区域遮挡 */
        padding-top: calc(var(--spacing-md) + env(safe-area-inset-top, 0px));
    }

    .group-chat__input-area {
        /* 确保输入区域不被安全区域遮挡 */
        padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom, 0px));
    }

    .group-chat__trigger {
        bottom: calc(var(--spacing-lg) + 40px + var(--spacing-md) + env(safe-area-inset-bottom, 0px));
        right: var(--spacing-lg);
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }

    .group-chat__bubble {
        max-width: 85%;
    }

    .group-chat__avatar {
        width: 32px;
        height: 32px;
        min-width: 32px;
    }
}

/* 平板适配 */
@media (min-width: 641px) and (max-width: 1024px) {
    .group-chat {
        width: 360px;
        height: 500px;
    }
}

/* 移动端按钮大小调整（与返回顶部按钮一致） */
@media (max-width: 768px) {
    .group-chat__trigger {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
}