/* ============================================
   聊天页样式 - 现代简约
   ============================================ */

.chat-screen {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ============ 顶部栏 ============ */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    flex-shrink: 0;
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.room-badge {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-dark);
    background: var(--glass-strong);
    padding: 4px 12px;
    border-radius: var(--r-full);
    border: 1px solid rgba(255,255,255,0.4);
}

.online-count {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    background: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(22, 163, 74, 0.4);
}

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

.connection-status {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--r-full);
    transition: all var(--ease);
}

.status-connected { background: rgba(22, 163, 74, 0.12); color: var(--success); }
.status-connecting { background: rgba(217, 119, 6, 0.12); color: var(--warning); }
.status-disconnected { background: rgba(220, 38, 38, 0.12); color: var(--error); }

.user-profile {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 4px 10px;
    background: var(--glass);
    border-radius: var(--r-full);
    border: 1px solid rgba(255,255,255,0.3);
    cursor: pointer;
    transition: background var(--ease);
}

.user-profile:hover { background: var(--glass-strong); }

.user-profile .avatar {
    width: 26px;
    height: 26px;
    font-size: 11px;
}

.user-nickname {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
}

/* ============ 聊天主体 ============ */
.chat-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* ============ 在线用户侧栏 ============ */
.users-sidebar {
    width: 200px;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid var(--card-border);
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,0.3);
}

.users-list {
    list-style: none;
    overflow-y: auto;
    flex: 1;
}

.users-list::-webkit-scrollbar { width: 4px; }
.users-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.3); border-radius: 2px; }

.users-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    margin-bottom: 2px;
    border-radius: var(--r-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    transition: background var(--ease);
}

.users-list li:hover { background: var(--glass); }

.user-dot {
    width: 7px;
    height: 7px;
    background: var(--success);
    border-radius: 50%;
    flex-shrink: 0;
}

/* ============ 消息区域 ============ */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px 24px;
}

.messages-container::-webkit-scrollbar { width: 5px; }
.messages-container::-webkit-scrollbar-track { background: transparent; }
.messages-container::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.25); border-radius: 3px; }

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-height: 100%;
}

/* ============ 消息气泡 ============ */
.message {
    max-width: 70%;
    animation: msgIn 0.3s var(--bounce);
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(12px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.message.self { align-self: flex-end; }
.message.other { align-self: flex-start; }

.msg-row {
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.msg-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity var(--ease);
}

.msg-avatar:hover {
    opacity: 0.8;
}

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

.msg-avatar-text {
    font-size: 14px;
    color: #fff;
    font-weight: 600;
}

.msg-content-wrap {
    display: flex;
    flex-direction: column;
}
.message.self .msg-content-wrap { align-items: flex-end; }
.message.other .msg-content-wrap { align-items: flex-start; }
.message.system { align-self: center; align-items: center; max-width: 90%; }

.message-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 3px;
    padding: 0 6px;
}

.message-nickname {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary-dark);
}

.message.other .message-nickname { color: var(--text-secondary); }

.message-time {
    font-size: 11px;
    color: var(--text-muted);
}

.message-bubble {
    padding: 10px 16px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 1.55;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message.self .message-bubble {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-bottom-right-radius: 6px;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.2);
}

.message.other .message-bubble {
    background: var(--glass-strong);
    backdrop-filter: blur(4px);
    color: var(--text);
    border-bottom-left-radius: 6px;
    border: 1px solid rgba(255,255,255,0.35);
}

.message.system .message-bubble {
    background: var(--glass);
    color: var(--text-secondary);
    font-size: 12px;
    padding: 5px 16px;
    border-radius: var(--r-full);
    border: 1px solid rgba(255,255,255,0.2);
    text-align: center;
    font-weight: 500;
}

/* ============ 输入区域 ============ */
.input-area {
    padding: 14px 24px;
    padding-bottom: calc(14px + env(safe-area-inset-bottom));
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--card-border);
    flex-shrink: 0;
}

.message-form {
    display: flex;
    gap: 10px;
    align-items: center;
}

.message-input {
    flex: 1;
    padding: 12px 18px;
    background: var(--glass-strong);
    backdrop-filter: blur(4px);
    border: 1.5px solid rgba(255,255,255,0.4);
    border-radius: var(--r-md);
    color: var(--text);
    font-size: 15px;
    font-family: var(--font);
    outline: none;
    transition: all var(--ease);
}

.message-input:focus {
    border-color: var(--primary);
    background: rgba(255,255,255,0.7);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.message-input::placeholder { color: var(--text-muted); }

/* ============ 侧边栏切换（移动端） ============ */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    z-index: 50;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-left: none;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    padding: 6px 5px;
    cursor: pointer;
    transition: all var(--ease);
}

.sidebar-toggle:hover { background: var(--glass-strong); }

.sidebar-toggle-icon { font-size: 16px; color: var(--text-secondary); }

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 45;
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    .users-sidebar {
        position: fixed;
        left: -200px;
        top: 0;
        height: 100vh;
        width: 200px;
        z-index: 55;
        transition: left var(--ease);
        box-shadow: 4px 0 24px rgba(0,0,0,0.1);
    }
    .users-sidebar.open { left: 0; }
    .sidebar-toggle { display: flex; align-items: center; justify-content: center; }
    .sidebar-overlay.open { display: block; }
    
    .chat-header { padding: 10px 16px; }
    .header-left { gap: 10px; }
    .messages-container { padding: 14px 16px; padding-left: 34px; }
    .input-area { padding: 12px 16px; }
    .message { max-width: 85%; }
    .room-badge { font-size: 13px; }
    .message-input { padding: 11px 16px; font-size: 14px; }
    .btn-send { padding: 10px 20px; font-size: 13px; }
    .message-bubble { padding: 9px 14px; font-size: 14px; }
    .connection-status { display: none; }
}

@media (max-width: 480px) {
    .header-right .user-nickname { display: none; }
    .chat-header { padding: 8px 12px; }
    .messages-container { padding: 10px 12px; padding-left: 30px; }
    .input-area { padding: 10px 12px; }
    .message { max-width: 90%; }
    .message-input { padding: 10px 14px; font-size: 13px; }
    .btn-send { padding: 8px 16px; font-size: 12px; }
    .message-bubble { padding: 8px 12px; font-size: 13px; }
    .message-header { margin-bottom: 2px; }
    .message-nickname { font-size: 11px; }
    .message-time { font-size: 10px; }
    .sidebar-toggle { top: 50px; }
    .users-sidebar { width: 180px; left: -180px; }
}