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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f8f9fa;
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 房间号输入界面 */
.room-input-section {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    margin: 50px auto;
    max-width: 500px;
    border: 1px solid #e1e5e9;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: #2563eb;
    font-weight: 700;
}

.header p {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.room-input-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-group label {
    font-weight: 600;
    color: #555;
    text-align: left;
}

.input-group input {
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1.2rem;
    text-align: center;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.divider {
    position: relative;
    text-align: center;
    color: #999;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e1e5e9;
}

.divider span {
    background: rgba(255, 255, 255, 0.95);
    padding: 0 20px;
}

/* 按钮样式 */
.btn-primary, .btn-secondary, .btn-danger, .btn-tool {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: #f8f9fa;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-secondary:hover {
    background: #2563eb;
    color: white;
    transform: translateY(-2px);
}

.btn-danger {
    background: #dc3545;
    color: white;
    padding: 10px 20px;
    font-size: 0.9rem;
}

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-2px);
}

.btn-tool {
    background: #6c757d;
    color: white;
    padding: 8px 16px;
    font-size: 0.9rem;
    margin-right: 10px;
}

.btn-tool:hover {
    background: #5a6268;
    transform: translateY(-1px);
}

/* 文本编辑界面 */
.text-editor-section {
    background: #ffffff;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin: 20px auto;
    border: 1px solid #e1e5e9;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e1e5e9;
}

.room-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.room-code-display {
    font-weight: 600;
    color: #667eea;
    font-size: 1.1rem;
}

.connection-status {
    font-size: 0.9rem;
    color: #28a745;
}

.connection-status.disconnected {
    color: #dc3545;
}

.device-count {
    font-weight: 600;
    color: #666;
}

.editor-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.toolbar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

#shared-text {
    width: 100%;
    min-height: 400px;
    padding: 20px;
    border: 2px solid #e1e5e9;
    border-radius: 15px;
    font-size: 1rem;
    line-height: 1.6;
    resize: vertical;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    transition: border-color 0.3s ease;
}

#shared-text:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.text-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #666;
}

/* 设备列表 */
.device-list {
    background: #ffffff;
    border-radius: 15px;
    padding: 20px;
    margin-top: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e1e5e9;
}

.device-list h3 {
    margin-bottom: 15px;
    color: #2563eb;
}

.device-list-items {
    list-style: none;
}

.device-list-items li {
    padding: 10px;
    margin: 5px 0;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.device-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #28a745;
    animation: pulse 2s infinite;
}

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

/* 通知样式 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: #28a745;
}

.notification.error {
    background: #dc3545;
}

.notification.info {
    background: #17a2b8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .room-input-section {
        margin: 20px auto;
        padding: 30px 20px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .editor-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .toolbar {
        justify-content: center;
    }
    
    .text-info {
        flex-direction: column;
        gap: 5px;
        text-align: center;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}