/* 抖音自动续火花系统 - 全局样式 */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

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

/* 头部导航 */
.header {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 20px;
    color: #333;
}

.user-menu {
    display: flex;
    gap: 15px;
    align-items: center;
}

.user-menu a {
    color: #667eea;
    text-decoration: none;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s;
}

.user-menu a:hover {
    background: #667eea;
    color: white;
}

/* 登录/注册框 */
.login-box {
    background: white;
    border-radius: 15px;
    padding: 40px;
    max-width: 400px;
    margin: 60px auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo h1 {
    font-size: 24px;
    color: #333;
    margin-bottom: 10px;
}

.logo p {
    color: #666;
    font-size: 14px;
}

/* 标签切换 */
.tabs {
    display: flex;
    margin-bottom: 25px;
    border-bottom: 2px solid #eee;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    background: none;
    border: none;
    font-size: 16px;
    color: #999;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active {
    color: #667eea;
    border-bottom: 2px solid #667eea;
    margin-bottom: -2px;
}

/* 表单 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s;
}

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

.captcha-row {
    display: flex;
    gap: 10px;
}

.captcha-row input {
    flex: 1;
}

.captcha-row img {
    height: 44px;
    border-radius: 8px;
    cursor: pointer;
}

.btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.links {
    text-align: center;
    margin-top: 20px;
}

.links a {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
}

/* Tab内容切换 */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 空状态 */
.empty-state {
    background: white;
    padding: 60px 20px;
    text-align: center;
    border-radius: 10px;
    color: #999;
}

.empty-state a {
    display: inline-block;
    margin-top: 15px;
    background: #667eea;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
}

/* 响应式 */
@media (max-width: 768px) {
    .login-box {
        margin: 20px;
        padding: 25px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .user-menu {
        font-size: 14px;
    }
    
    .container {
        padding: 15px;
    }
}

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

.login-box {
    animation: fadeIn 0.5s ease;
}