/* 认证页面样式 - 亮色主题 */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Microsoft YaHei', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.auth-box {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    padding: 40px 32px;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo {
    width: 80px;
    height: auto;
    margin-bottom: 16px;
}

.auth-header h1 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 6px;
    font-weight: 600;
}

.auth-header p {
    color: #888;
    font-size: 14px;
}

/* 标签切换 */
.tab-switcher {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    background: #f0f2f5;
    border-radius: 10px;
    padding: 4px;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    color: #666;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active {
    background: #fff;
    color: #667eea;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* 表单 */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: #555;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    font-size: 14px;
    color: #333;
    background: #fafbfc;
    transition: all 0.3s;
}

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

.form-group input::placeholder {
    color: #aaa;
}

.btn {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(102,126,234,0.3);
}

/* 提示 */
.alert {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 13px;
}

.alert-error {
    background: #fff2f0;
    border: 1px solid #ffccc7;
    color: #cf1322;
}

.alert-success {
    background: #f6ffed;
    border: 1px solid #b7eb8f;
    color: #389e0d;
}

.form-tip {
    text-align: center;
    margin-top: 16px;
    font-size: 12px;
    color: #999;
}

/* 响应式 */
@media (max-width: 480px) {
    .auth-box {
        padding: 32px 24px;
    }
}