/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* 聊天容器 */
.chat-container {
    width: 100%;
    max-width: 800px;
    height: 90vh;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* 头部样式 */
.chat-header {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    padding: 20px 25px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: white;
}

.therapist-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.status {
    font-size: 14px;
    opacity: 0.9;
}

.status.online::before {
    content: '●';
    color: #4ade80;
    margin-right: 5px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

/* 消息区域 */
.chat-messages {
    flex: 1;
    padding: 25px;
    overflow-y: auto;
    background: #f8fafc;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.message {
    display: flex;
    margin-bottom: 20px;
    animation: fadeInUp 0.5s ease;
}

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

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin: 0 12px;
    flex-shrink: 0;
}

.message.therapist .message-avatar {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: white;
}

.message-content {
    max-width: 70%;
    background: white;
    padding: 15px 20px;
    border-radius: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
}

.message.user .message-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.message.therapist .message-content::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 8px solid white;
}

.message.user .message-content::before {
    content: '';
    position: absolute;
    right: -8px;
    top: 15px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 8px solid #667eea;
}

.message-content p {
    line-height: 1.6;
    margin-bottom: 8px;
}

.message-content p:last-of-type {
    margin-bottom: 0;
}

.message-time {
    font-size: 12px;
    opacity: 0.7;
    display: block;
    margin-top: 8px;
}

/* 输入区域 */
.chat-input-container {
    background: white;
    padding: 20px 25px;
    border-top: 1px solid #e2e8f0;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background: #f8fafc;
    border-radius: 25px;
    padding: 12px 20px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: #4facfe;
    background: white;
}

#messageInput {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    outline: none;
    font-family: inherit;
    font-size: 16px;
    line-height: 1.5;
    max-height: 120px;
}

#messageInput::placeholder {
    color: #94a3b8;
}

.input-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.btn-send {
    width: 40px;
    height: 40px;
    border: none;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-send:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.btn-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
    font-size: 12px;
    color: #64748b;
}

.char-count {
    opacity: 0.7;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #4facfe;
}

.typing-indicator i {
    font-size: 6px;
    animation: typing 1.4s infinite;
}

.typing-indicator i:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator i:nth-child(3) {
    animation-delay: 0.4s;
}

/* 设置面板 */
.settings-panel {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.settings-content {
    background: white;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.settings-header {
    padding: 20px 25px;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.settings-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.btn-close {
    width: 30px;
    height: 30px;
    border: none;
    background: #f1f5f9;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
}

.settings-body {
    padding: 25px;
}

.setting-group {
    margin-bottom: 20px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
}

.setting-group input,
.setting-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.setting-group input:focus,
.setting-group select:focus {
    outline: none;
    border-color: #4facfe;
}

.setting-group small {
    display: block;
    margin-top: 5px;
    color: #64748b;
    font-size: 12px;
}

.setting-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

.settings-footer {
    padding: 20px 25px;
    border-top: 1px solid #e2e8f0;
}

.btn-primary {
    width: 100%;
    padding: 12px 20px;
    border: none;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

/* 加载指示器 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-spinner {
    text-align: center;
    color: #4facfe;
}

.loading-spinner i {
    font-size: 40px;
    margin-bottom: 15px;
}

.loading-spinner p {
    font-size: 16px;
    font-weight: 500;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .chat-container {
        height: 95vh;
        border-radius: 15px;
    }
    
    .chat-header {
        padding: 15px 20px;
    }
    
    .chat-messages {
        padding: 20px;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .chat-input-container {
        padding: 15px 20px;
    }
    
    .settings-content {
        width: 95%;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .therapist-info .info h3 {
        font-size: 16px;
    }
    
    .avatar {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .message-avatar {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .message-content {
        padding: 12px 16px;
        max-width: 90%;
    }
}